ndbtoantap

5/25/2018 NDBTOANTAP

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B GIAO THNG VN TI

HC VIN HNG KHNG VIT NAM

NDB TAN TP

NGUYN VN THANH2011


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TI LIU THAM KHO

1. 125 W RADIO BEACON TRANSMITTER - ND500

2. BEACON MONITOR RECEIVER - NRB3

3. MILLARD PA 000 A TOWERS

4. 1000W RADIO BEACON TRANSMITTER - ND4000

5. MILLARD PA 000 B TOWER6. ANNEX 10 VOLUME 1


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MC LC

CHNG ICHC NNG NHIM VCA I NDB

MNG NDB CA VIT NAM

1. Mu2. Chc nng, nhim v ca i NDB3. Mng NDB ca HK Vit Nam

CHNG IICC YU CU KTHUT I VI I NDB

1. Gii tn2. Cng sut3. iu ch4. Tn hiu nhn dng5. Hthng kim tra v iu khin6. Hthng cp ngun7. ng-ten8. Vtr t i

CHNG III

I NDB ND500

1. Cc sliu kthut2. Schc nng3. Gii thch smt my ND5004. Hthng ng-ten5. Hthng cp ngun6. Hthng chng st7. Hthng my thu Monitor8. Bnp Acqui

CHNG IVI NDB ND 4000

1. Cc sliu kthut2. Schc nng


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3. Gii thch smt my ND 40004. Hthng ng-ten5. Hthng cp ngun6. Hthng chng st7. Hthng my thu Monitor8. Bnp Aqui

CHNG VKIM TRA BO DNG SA CHA THNG THNG I

NDB

1. Kim tra, nh gi i NDB hot ng trong iu kin chophp - i ND 5002. Kim tra, nh gi i NDB - i ND 4000

3. Kim tra khnng tt v chuyn my4. Kim tra hot ng ca ATU5. Cc hng hc, sai st quan st c trn mt my, nguynnhn v cch khc phc.6. Kim tra tham sca i NDB.

CHNG VISNGUYN L

I DN NG ND500

CHNG VISNGUYN LI DN NG ND4000

________________________


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CHNG I

CHC NNG NHIM VCA I NDBMNG NDB CA HK VIT NAM

1. Mu.NDB (Non Directional radio Beacon) cng vi ILS (Instrument

Landing System), VOR/DME (VHF Omnidirectional radio Range /Distance Measuring Equipment), l cc hthng thit bdn ng nhmmc ch ph trkhng vn trong chai ch:

- Hcnh ( Landing) ( Hnh 1-1)

- Dn ng ( Enroute ) ( Hnh 1-2 )

cc nc ang pht trin vngnh hng khng nhnc ta, thvic sdng NDB rt khthi v n mang li hiu qa kinh tcao. c bittrong vic o to nhn vin k thut t tn km, tuy nhin chnh xcthp. Trong tng lai NDB skhng c sdng.

2. Chc nng - Nhim vca i NDB.

2.1 Chc nng: Cung cp cho my bay thng tin vgc gia hng mimy bay v ng thng ni tmy bay n vtr t thit btrn mt t(o theo chiu kim ng htnh tmi ca my bay).

2.2 Nhim v:

a. Khi NDB lm nhim vi gn, i xa (Locator) : N gip cho my bay

xc nh c trc ng bng hcnh ( chLanding ).- i TD, i GV xc inh trc ng bng 25R (TSN )

- i SG, i GN xc nh trc ng bng 25N (TSN )

- i BU, i HT xc nh trc ng bng 09 (BMT )

b. Khi NDB lm nhim vi im cho mt sn bay : N gip cho mybay xc nh c hng bay vsn bay sau hcnh theo phng thcbng mt.

c. Khi NDB lm nhim vi im cho mt ng bay ( chEn-route

): N c t ni giao im gia hai ng hng khng (Airway) haygia mt ng hng khng, gip my bay bay ng ng hng khng.

3. Mng NDB ca Vit nam : ( Xem phlc 1)


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Phlc 1

HTHNG I NDB KHU VC TCT CNG HKMN

STT Tn Khu Vc Nhim v Thit bfct

(Khz)Cngsut(W)

IdentGhiCh

1 Sn bay TSN

25 R i xa ND 500 358 50/125 TD

i gn ND 500 375 30/125 GV off

25 L i xa ND 500 326 50/125 SGi gn ND 500 343 30/125 GN

2 Sn bay LK i xa,im

ND4000

330 1000 DL

i gn ND 500 312 50/125 HYD

3 Sn bayBMT

i xa,im

ND4000

386 1000 BU

i gn ND 500 370 50/125 HT

4 Sn bay CL i gn XLA 50 350 50 CL off5 Sn bay PQ i gn ND 500 278 50/125 PQ

6 Sn bay RG i gn ND 500 335 50/125 RG

7 Sn bay QL i gn ND 500 305 50/125 QL

8 Sn bay CS i gn ND 500 333 100 CS


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HTHNG I NDB KHU VC TCT CNG HKMB


( Khz)Cngsut(W)

IdentGhiCh

1 Sn bay

Ni Bi

i xa 320 KW

i gn 230 K

2 Sn bay

Ct Bi

i xa 274 BK

i gn 327 B

3 Sn bayVinh

i xa 218 XW

i gn 448 X

4 Sn bayN sn

i gn 349 BQ

5 Sn bay inBin

i gn 380 DB

6 Sn bay GiaLm

i gn 408 GL


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HTHNG I NDB KHU VC TCT CNG HKMT


( Khz)Cngsut(W)

IdentGhiCh

1 Sn bay

Nng

35 R i xa ND4000

212 1000 DJ

i gn ND 500 234 50/125 D

2 Sn bay PhBi

i xa ND2000

440 500 PB

i gn ND 500 348 125 P

3 Sn bay PhCt

i xa ND

2000

250 500 PC

i gn ND 500 388 50/125 C

4 Sn bayPleiku

i gn ND4000

282 1000 PK

5 Sn bayng Tc

i gn LX4000

200 150 TH

6 Sn bay NhaTrang

i gn ND2000

289 200 NG

7 Sn bay CamRanh i gn


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HTHNG I NDB KHU VC TCT QUN L BAY


( Khz)Cngsut(W)

IdentGhiCh

1 Khu vc MN

i An Lc i im SA1000

320 1000 AC

2 Khu vc MB

i Ninh

Bnh

i im SA

1000

304 1000 HL

3 Khu vc MB

i McChu

i im SA1000

514 1000 MC


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i xa ( K2 )

i gn( K1 )

ng CHC

Hnh 1-1


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W1

PK

w1

D

w1 BU

AC

DInt 30 KmDDom 20 Km

Hnh 1-2


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CHNG II

CC YU CU KTHUT I VI I NDB

1. Cc khi nim cbn.- i Locator : Mt i NDB lm vic trong gii tn LF/MF c

sdng cho mc ch tip cn hcnh.- My thu ADF : C gii thng bng 6 KHz.

2. Gii tn slm vic ( Radio frequencies ).- Gii tn lm vic ca cc i NDB nm trong khong (190

1750) KHz. Vi sai stn s cho php f 0,01% so vi tn slmvic. Trong trng hp i NDB c cng sut pht ln hn 200W v tnslm vic ln hn 1606,5 KHz th f yu cu l 0,005 % .

- Vi cc i Locator lm nhim vkt hp btrcho hthng ILS

th tn slm vic gia hai i phi cch nhau mt khong fcr v cqui nh :15KHz < fcr < 25KHz

3. Cng sut pht ( Coverage ).

* Cng sut pht ca i NDB phi c m bo phsng ng vimt c ly nht nh ty thuc vo nhim vca i.

- Trong ch landing : T(15 20 ) nautical mile

- Trong ch en-route : T( 25 150 ) nautical mile

* Cng sut pht ca mt i NDB khng c vt qu 2dB so vimc cn thit m bo tm ph sng ca cly cho php.4. iu ch ( Modulation ).

Tn hiu m tn iu chca i NDB thomn cc tiu chun sau :

a. Tn sm thanh iu ch( The Modulating tone) :

- Tiu chun 1020 Hz 50 Hz .

- Tiu chun 400 Hz 25 Hz .b. su iu ch ( The depth of modulation ) 95% .

5. Tn hiu nhn dng ( Identification ).- Sdng m Morse quc t.

- Tc 7 Ident / 1 pht .

- Ni dung : Ti a l 3 t( chhoc s)

- Thi gian c php mt Ident : Khng qu 1 pht .


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6. Hthng kim tra v iu khin ( Monitoring ) .

Tiu chun ti thiu ca h thng kim tra v iu khin ca mti NDB gm :

- Cng sut : Khi cng sut gim -3dB phi tchuyn my (hoc tt

my).- Mt tn hiu nhn dng : Phi t chuyn my ( hoc tt my ).

- Hthng Monitor c sc: Phi t chuyn my (hoc tt my).7. Hthng cp ngun ( Power supply ).

H thng cp ngun y cho mt i NDB gm 3 dng theo thtu tin sau :

- in mng cng nghip ( AC )

- in my n( AC )

- Acquy ( DC )

Khi mt ngun, thi gian chuyn i t ngun ny sang ngun khcty thuc vo nhim vca thit b( thng thng t 820).

H thng chuyn i l tng l h thng chuyn i tng. Mhnh hot ng ca hthng c chra hnh v2-1.8. ng-ten ( Antenna ).

Thng thng cc i NDB sdng cc dng ng-ten sau :

- ng-ten ch T .

- ng-ten ch I .

- ng-ten c hsphm cht cao - Polestar.ng-ten c nh gi qua mt tham s gi l h s bc x ca

ng-ten. Hs c nh ngha : Cng sut bc xra khng gianCng sut u vo ca ng-ten

H s bc x ca ng-ten ph thuc vo cng sut u vo cang-ten ( tc cng sut ca my pht ). Cng sut u vo cng ln ihi h s bc x ca ng-ten cng ln tc phm cht ca ng-ten cngcao.

Bng 2-1 chra sphthuc gia cng sut u vo ca ng-ten vhsbc xca ng-ten ( tn s300KHz ) .


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Hnh 2-1

OK in mngcng nghip

NO

( 8 15 )

OK Ngun Acqui

NO

OK in my n

NO

OK Ngun Acqui

Bng 2-1Input power Radiation efficiencyto ng-tenna of ng-

tennaa. 5 KW 20% ( -7 dB )

b. 5 KW 10% ( -10 dB )

c. 1 KW 8% ( - 11 dB )d. 500 W 5% ( -13 dB )e. 100 W 3% ( -15 dB )f. 50 W 2% ( -17 dB )g. 10 W 1% ( -20 dB )h. 10 W 0,3% ( -25 dB )9. Vtr t i ( Siting ).

Ty thuc vo nhim v ca i NDB m v tr t i c xcnh.

a. Khi NDB l i im :

- Nu l i im trong ch En-route th n l giao im cahai Airway hoc nm trn mt Airway v l tm ca Airway . Chiu caoca ng-ten c tnh ton ph hp v cng sut ca my.


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- Nu l i im trong ch Landing th n c t ti Snbay mt vtr thun li cho vic pht sng, chiu cao ca ng-ten khngc vi phm vo tnh khng ca Sn bay .b. Khi NDB l i gn, i xa :

- Nu l i xa, chiu cao ng-ten ti thiu 18m, v tr i cchim chm bnh trn ng bng t 6.700 11200 m .

- Nu l i gn, chiu cao ng-ten ti a 12m, vtr i cch imchm bnh trn ng bng 1.050m 150 m .c. Khi NDB lm nhim vi locator kt hp btrcho hthng ILS thvtr ca n t vtr ca i Outer v Middle marker v nm vcng 1pha ca trc ng hct cnh .

========================


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CHNG III

I NDB ND500

I. CC SLIU KTHUT1. Gii tn lm vic : (190 535 ) KHz

2. Phng php n nh tn s.

- Dng dao ng thch anh .

- Dng tng hp tn s3. Sai stn scho php :0,005 %4. Dng truyn :

- NON : Pht sng mang lin tc (CW )

- A2A : Pht kha Manip ( MCW )5. Cng sut :T 25W n 125W ( iu chnh c vi ti 50)6. Tn sm iu ch: 1020 Hz hay 400Hz , vi sai scho php 5%7. su iu ch: ( 0 95) % ( iu chnh c )8. Cp ngun bng AC :

- in p : (180 250 ) V hay ( 95 125 ) V mt pha, xoay chiu

- Tn s: 50Hz hay 60 Hz

- Cng sut tiu th: Ti a 350 VA.

9. Cp ngun bng DC :Ngun Acqui 48V10. Cc iu kin tt / chuyn my :

- Mc Carrier gim hn -3dB ( cng sut gim 50% )

- Mc iu ch(su iu ch) gim hn -4dB ( gim 40% )

- Mt Keying .12. Cc sliu vKeyer :( minh ha H. 3-1)

- Tc : 7 ttrong 1 pht

- di ca Dot : 0.125 s

- di ca Dash : 0.375 s (gp 3 ln Dot )- Khong trng gia cc phn t: 0.125 s

- Khong trng gia cc t: 0.375 s

- di ca khung Code : 8s

- Ni dung : Ti a 3 t


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BNG M MORSE QUC T

A M Y

B N Z

C O 1

D P 2

E Q 3

F R 4

G S 5

H T 6

I U 7

J V 8

K W 9

L X

Bng 3 - 1

Thhin m hiu i TD

dash : 0,375s dot : 0,125s

Space : 0,375s

T D

13. iu kin ca mi trng :

- Nhit cho php : T -100 C n 550 C

- m cho php : T0 n 95%

- Cao : Ti a n 3000 m


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II. SCHC NNG : ( xem H. 3-2 )1. Cu hnh chung :

Mi mt my pht ND 500 c tchc gm 8 vmch ( k hiu tA1 n A9, trong A2 v A9 cng mt chc nng ) v hthng n ch

thcng mt ccu o hon chnh.2. Chc nng ca tng vmch :

a. Vmch A1 ( Power supply ) :

Vmch cung cp ngun c nhim v:

- To ra in p B++ 50 V

- To ra in p + 24 V

- To ra in p + 15 V

- Khi mt ngun AC tng chuyn sang cp ngun bng Acqui .

b. Vmch A2 ( A9 ) :Vmch to dao ng RF, theo 2 phng php :

- Dng Thch Anh ( A2 ) ( RF Drive )

- Dng tng hp tn s: ( A9 ) ( Synthesizer )

C nhim vto ra mt dao ng hnh Sin c tn sng bng tnslm vic ca i ( fCR ) vi sai stn scho php .c. Vmch A3 ( Keyer ) :

Vmch to dao ng Keyer, c nhim v:

- To ra tn sm thanh theo yu cu 1020 Hz hay 400 Hz vi saischo php.

- To ra Ident theo yu cu .d. Vmch A4 ( Modulator drive ) :

Vmch to tn hiu c iu ch. Tn hiu ny l tn hiu xungc iu chtheo chrng ca xung mang hai thng tin :

- Mc cng sut sng mang .

- Tn hiu m tn c m ho .

V vy vic iu chnh su iu ch( M % ) v mc cngsut sng mang ( O/P Power ) u c thc hin trn vmch ny.e. Vmch A6 ( Power amplifier / Modulator ) :

Vmch iu chv khuych i cng sut lm nhim viu chtn hiu xung vmch A4 to ra vi tn hiu rf tvmch A2 ( A9 ) sau


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a n khuych i to tn hiu cui cng c cng sut t c125 W vi su iu ch 95% gii tn scho php .f. Vmch A5 ( Monitor ) :

Vmch monitor c thcho php kim tra v tng iu khin cc

chc nng sau :- Kim tra cng sut sng ti ( Fwd Power ) : Kt hp vi ng h

M1

- Kim tra cng sut sng phn x( Refl PWR ) : Kt hp vi nghM1

- Kim tra tn hiu m thanh : Kt hp vi loa LS1

- Kim tra mc suy gim cng sut : Mc suy gim khng vt qu -3dB (50%)

- Kim tra mc suy gim ca su iu ch : Mc suy gim khngc vt qu -4dB ( 40% )

- iu khin tt v chuyn my : Khi mt Ident cng sut gim -3dB,su iu chgim -4dB , thi gian chuyn my khong t20 80.

- Kim tra squ iu ch: Khi su iu chqu mc cho php( M% > 95% )

- Kim tra sng phn x: Khi sng phn xln qu mc cho phpskhng ch cng sut pht (khng tng c cng sut ) v khng

chuyn c my .-Kim tra v iu khin chuyn ngun : Khi ngun AC c sclptc chuyn sang ngun Acqui dphng .

- Ni tt Monitor ( Bypass control ) : Khi s dng ch nyMonitor smt khnng iu khin tt v chuyn my.

g. Vmch A7 ( Harmonic filter ) :

Vmch lc sng hi, l mt b lc thng thp lm suy gim cc hibc cao ca tn hiu pht ra. s lng tin v cun cm ca mch lcc sdng ty thuc vo tn slm vic. Do khi thay i tn slmvic ca my pht cn lu n sthay i ny.

h. Vmch A8 ( Calibration ) :

Vmch l mt phn thuc ccu o lng trn mt my.

( xem bng 3-1 v hnh 3-2 )


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III. GII THCH SMT MY ND 500 :( xem H 3-4 )1. Trong khung ch POWER.

a. Cng tc ngun :

Dng khng chngun cAC - DC

- ON : Mngun

- OFF : Tt ngunb. Cu ch ( FUSE - SLOW ) :

Cu ch tc ng chm dng bo vmy khi qu ti, c gi tr4Avi ngun 230 V v 7A vi ngun 115 Vc. n Led mu xanh ( AC ) :

Khi c ngun AC cung cp n Led sng ln .2. Trong khung ch CONTROL.

a. Cng tc iu khin :Cho php iu khin my ti chhay txa.

- LOCAL : iu khin ti ch

- REMOTE : iu khin txab. n Led mu vng :

Khi t cng tc iu khin vvtr REMOTE n Led sng ln.3. Trong khung chMONITOR.

a. Cng tc kim tra :

Cho php MONITOR gim st hoc khng gim st my ( ch cchc nng Shutdown chuyn my ), c hai vtr nhsau :

- NORMAL : Monitor cho php Shutdown hay chuyn my khi cctiu chun bvi phm.

- BYPASS : Khnng trn khng c tc dng.b. n Led mu vng :

Khi t cng tc kim tra vvtr BYPASS n Led sng ln.4. Loa v chit p iu chnh m lng ( VOLUME ).

Dng iu chnh m thanh theo Key.5. ng hTEST v chuyn mch o.

Dng o cc tham s:

- Ngun + 15 V : Quan st thang 0 100 [V ]

- Ngun + 24 V : Quan st thang 0 100 [V ]


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- Ngun B+ : Quan st thang 0 100 [V ]

- Dng ca ngun DC ( DC CURRENT ) :

Quan st thang 0 100 [A ] [x 0,1 A ]

- Cng sut sng ti (FWD PWR) : Quan st thang 0 200 [W ] - Cng sut sng phn x(REFT PWR) :

Quan st thang 0 200 [W ]

- su iu ch ( MOD% ) : Quan st thang 0 100 [% ]Ring khi o su iu ch ( MOD % ) cn phi t chuyn mch

ng ho vv tr REF , sau xoay chit p SET 100% REF kimng hTEST chng v tr 100 ( thang 0 100 ), sau a chuynmch ng ho vvtr MOD% READ tin hnh php o.6. Cng tc KEYING.

Tt hoc mKEY- ON : Keyer hot ng, my lm vic chKeyed MCW

- OFF :Keyer khng hot ng, my lm vic chMCW7. Cng tc MOD.

Tt hoc mModulator driver hot ng

- ON : Cp + 15 V vo cho Modulator driver hot ng

- OFF : Ngt + 15 V ra khi Modulator driver8. Cc cu ch mt chiu.

- Cu ch BATTERY 10A SLOW : Cu ch tc ng chm dng bo vmy khi qu ti trong trng hp sdng ngun Acquy.

- Cu ch REG DC PWR 1A SLOW : Cu ch tc ng chm dngbo vmch Regulator +15V v + 24V.

-Cu ch + 15 V DC ext 3/4 A : Cu ch dng bo vkhi sdng ngun + 15V DC bn ngai.9. u Jack RF monitor.

Dng kim tra, hiu chnh my khi cn :

- Kim tra tn ssng mang.- Kim tra su iu ch.

- Kim tra dng sng.10. Trong khung chATU.

a. Nm n INCREASE : iu chnh theo chiu tng.


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b. Nm n DECREASE : iu chnh theo chiu gim

c. n Led STALL : Sng ln chthMotor ang hot ng.11. Trong khung chALARM.

a. n Led RF DRIVE : Nu Led sng ln chthmc rf drive suy

gim di ngng c hiu chnh.b. n Led Mod DRIVE : Nu Led sng ln chthxung PWM c

rng qu ln v l nguyn nhn lm tng cng sut rf u ra qamc cho php.

c. n Led OVEMOD : Nu Led sng ln chthdng ng-ten vtqa dng ng-ten theo tiu chun ca ti 50.

d. n Led SWR : Nu Led sng ln chthsng phn xvt qa5% i vi cng sut sng ti.

e. n Led BATTERY : Nu Led sng ln chthngun AC sdngbsc( mt AC ) v Batt c sdng.

f. n Led SHUTDOWN : Nu Led sng ln my khng hot ng.12. Cng tc chuyn my MAIN - STANBY.

t vvtr no ( A hay B ) th my c chn l my MAIN.IV. HTHNG NG-TEN

ng-ten s dng cho i NDB ND500 l dng ng-ten c h sphm cht cao Polestar A Series do hng Millard sn xut trn thit kcahng Nautel.

1. Sliu kthut ca ng-ten.- Gii tn lm vic : (190 535 ) Khz.

- Cng sut RF u vo ng-ten : > 125 W

- Trkhng u vo : 50

- Khong iu chnh tng ca motor : 2.5 % ca tng scmkhng ti.

- Gin hng : V hng.

- Ngun mt chiu cp cho motor : 12 V DC2. Cc yu cu vmt phn x:

- Mt phn xca NDB ND500, gm mt hthng dy dn gm 6tia, mi tia di 165 feet , cch nhau mt gc 60 . B tr mt phn xc trnh by trn hnh vH 3-5.


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- Cc tia ca mt phn xc chn su di mt t khong t(0,41 ) m, sau c ni n mt vng dy ng bao quanh chn cang-ten, v c tip t tht tt.

- Hthng cp in, cc cng trnh khng c xy ct gn hthng

mt phn x. Khong cch ti thiu l 1 m.- Tt c cc yu cu k thut i vi mt phn xphi c thc

hin, iu nh hng rt ln n phm cht ca ng-ten, tc cng sutsng ti v cng sut phn x( Lm gim cng sut sng ti v cng sutphn x).3. Hthng ATU . ( hnh v3-6 )

a. Chc nng ca hthng ATU :

- Phi hp trkhng gia my pht v ng-ten.

- iu chnh cng hng vtn scho ng-ten tn slm vic.b. Nguyn l lm vic ca hthng ATU : ( Xem hnh v3-6 )

- Bin p T1 ( Matching transformer ) : Lm nhim vphi hp trkhng gia my pht v ng-ten . N cho php my pht lm vic cvi ng-ten c trkhng nm trong khong ( 6.6 34.7 ) . Bc chnhth bin p T1 c thhin bng 3-2.

- Vi mt tn s lm vic c yu cu trc, th cun dy chnh(Main coil) sc qun trc cnh v chim 90% gi trcm khng.10% cn li nm cun L1 ( Tuning coil ) ( xem hnh vH 3-7) v ciu chnh cng hng tng nhhthng Servo-Tuning motor, tc cng hng l tng.4. Vtr lp t gia ng-ten v phng t thit b.

Vnguyn tc, gia phng t thit bv v tr t ng-ten cnggn cng tt nhm mc ch lm gim suy hao mc cng sut a tmypht n ATU. Nhng phi m bo khng lm nh hng n mt phnxnh ni.V. HTHNG CP NGUN

Hthng cp ngun ca i NDB ND 500 gm :

- Hthng cung cp ngun bi mng in cng nghip.- Hthng cung cp ngun bi my n( hai my )

- Hthng cung cp ngun bi ngun mt chiu (acquy ).Cch btr lp t trong phng my c m tnhhnh vH 3-8.

- Panel phn bngun ty thuc vo slng CB sdng khngchcc hthng. Thng thng gm c : CB tng, CB cho my pht, CB


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cho my iu ha, CB cho my np Acquy, CB cho ATU, CB cho n bosng, CB cho sa cha... cn tnh ton dng CB cho ph hp vi ti tiuth.

- TSurge protector dng bo vthit bkhi c sthng ging ca

in p cp ngun mt cch t ngt . Ty thuc vo slng pha ngunc s dng ( 1 pha, 3 pha...), cch mc Surge protector c trnh by hnh vH3-9.VI. HTHNG CHNG ST

- Ty thuc vo mc cng sut c s dng m iu chnhSpark gap cho ph hp. Spark gap c t nh ng-ten do cn phi lu khi iu chnh. Bng 3-3 chra khong cch iu chnhSpark gap ph hp vi cng sut.

- H thng tip Masse phi c m bo v ni vo trng-ten

mt cch chc chn , bo m tip xc tt thng xuyn.VII. HTHNG MY THU MONITOR1. Gii thiu chung .

My thu monitor v ng-ten l hthng ng bcng c thit kv sn xut ti hng Nautel.

- My thu : NRB3.

- ng-ten : NLA/1.2. Cc sliu kthut.

a. Ca my thu :

- Trkhng u vo : ( 50 70 ) .

- Gii tn : ( 190 535 ) KHz

- n nh tn s : 0.005%

- Tn strung tn : 4.4 MHz.

- nhy : 5 micro volt ( vi S/N = 10 dB, M% = 30% )

- Ngun cung cp : ( 102 132 ) VAC

: ( 204 264 ) VAC.b. Ca ng-ten :

- Gii tn : ( 190535 ) Khz

- Ngun cung cp : 12 VDC.3. Skhi ca my thu monitor NRB 3.Bao gm nhng khi sau : ( xem hnh H 3-10 ).


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a. Vmch to dao ng / khuych i Rf ( A1) : C nhim vtora tn hiu tbto dao ng ti chbng thch anh trn vi tn hiu Rfthu c tch ra tn hiu trung tn c tn s4.4 Mhz.

b. Vmch khuych i trung tn v tch sng ( A2 ) : khuych i

tn hiu trung tn tu ra ca A1 sau tch ra tn hiu audio.c. Vmch khuych i m tn ( A3 ) : Khuch i tn hiu Audio

ly tA2 ln a ra loa.

d. Vmch monitor ( A2 ) : monitor mc MOD% v mc cngsut sng mang ca tn hiu thu c.

e. Vmch ngun ( A4 ) : Bin ngun AC thnh cc ngun DC :12V, 28V cung cp cho mch.4. Gii thch smt my .

- Cng tc POWER ( ON/OFF ) : Cp v khng cp ngun chomy thu.

- Cu ch POWER - SLOW - 1/4 A : Bo vngun khi qa ti.

- n Led xanh POWER : Chthkhi c ngun AC cung cp.

- Chit p AUDIO LEVEL : iu chnh m lng ra loa.

- ng hCARIER LEVEL : cho php kim tra mc tn hiu sngmang thu c.

- Cc Led trong khung ALARM : CARRIER, MOD bo ng tnhiu thu nhn c b qu iu ch hoc gim cng sut khi Ledsng ln. ( gim di 3dB )

- Nm n TEST : Kim tra mc ngng ca mch Monitor ( kt hpvi ng hCarrier lever ).

VIII. BNP ACQUI1. Gii thiu chung.

B np Acqui 48V cng c thit k ng h v sn sut biNautel, nhm mc ch thng xuyn np btrngun mt chiu gm 04bnh Acqui 12 V .2. Cc sliu kthut.

- Tn gi ca Nautel : NAB 5

- in p np ( cha c ti ) : ( 51 67 )V

- Dng in np : Ti a 3A

- Ngun in cung cp : 115 VAC - 60 Hz

230 VAC - 50 Hz


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- Cng sut tiu thti a : 500 VA

- Nhit mi trng hot ng : - 10 0C + 55 0C

- m tng i : 0 90 %3. Skhi bnp Acqui. ( Hnh 3-11 )

a. Khi cp ngun xoay chiu : ( AC Power supply )

- Cp in p : 17,5 VAC cho bcp ngun 23 V DC khng cn p

- Cp 75 VAC i xng cho bnn cu hai bn k.b. Khi cp ngun 23V DC khng c n p :

Cp 23 V DC khng c n p cho :

- Khi cp ngun 15 V DC c n p .

- n hin thDS1 - Chthc ngun cung cp.- Bsha

- Bto xung rng ca

- Khi iu khin ng m Thyristor.c. Khi cp ngun 15V DC c n p :

Cp 15 V DC c n p cho :

- Khi so snh in p ngun Acqui.

- Bnh thi 8 S

- Khi iu khin dng np.d. Bsha :

Bin i tn hiu 23V DC nhp nh thnh tn hiu xung nhn cbin l 2,2V a n bto xung rng ca.

e. Bto xung rng ca :

To ra xung rng ca txung nhn

f. Khi so snh in p ngun Acqui :

- So snh in p chun vi in p ngun Acqui cho php bnphot ng

- Trch mu nhit tSensor nhit cho php bnp tnghot ng.

g. Bnh thi 8S :

- To tn hiu iu khin shot ng ca bxung rng ca .


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- To tn hiu Reset bnh thi.

h. Khi iu khin dng np :

Cho php iu chnh cng dng np trong phm vi cho php .

i. Khi iu khin ng mThyristor :

To tn hiu ng mtun t 2 Thyristor ca mch nn cu haibn k.

k. Bnn cu hai bn k:

Bin i tn hiu xoay chiu 75V thnh tn hiu mc mt chiu an u ra ca bnp.4. Gii thch smt my.( Hnh 3-12 )

- Cng tc ON/OFF : Khng chngun cung cp cho bnp .

- n Led xanh : Sng ln khi bo c ngun 23V.

- Cu ch F1 : Cu ch 5A - 250 V bo vngun u vo.

- Cu ch F2 : Cu ch 5A - 60 V bo vngun u ra .

- Vmch A 1 : Vmch iu khin bnp.

- Bin p T1 : Bin p ngun ca bnp.

- Cun chn L1 : Lc ly in p trung bnh mt chiu.

- TB1 : Ni in u vo .

- TB2 : Ni n acqui v sensor nhit.

5. Cc hin tng hng hc - Nguyn nhn - Cch khc phc .

Hin tng Nguyn nhn Cch khc phc

1. Khi bt cng tcngun v v tr ONn Led khng sng

a. Hng cu ch F1b. Khng c in p voc. Khng c 23V DC

a. Thay thb. Kim tra TB1 ( 4-5 )c. Kim tra +23V it

CR1

2. Khng c dngnp n Acqui

a. Hng cu ch F2b. Khng c xung kchmThyristor Q1 v Q2c. Acqui np y

a. Thay thb. Kim tra xung kch mti cc cng ca Q1 vQ2


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c. Kim tra in p Acqui

3. Acqui khng cnp n in p yucu

iu chnh sai bin trR24

iu chnh li

4. Dng np khngng yu cu

iu chnh sai bin trR18

iu chnh li


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CHNG IV

I NDB ND 4000

I. CC SLIU KTHUTCc tiu chun ca i ND4000 hu nhging i ND500, chkhc

cc im sau :1. Cng sut pht.

- Ngun AC : ( 200 1000 ) W

- Ngun DC : ( 150 750 ) W2. Ngun cung cp :

- Ngun xoay chiu AC : T180 250 Volt


- Ngun mt chiu : - 60 VII. SCHC NNG. ( Hnh 4-1 )1. Cu hnh chung .

Mi mt my pht bao gm cc khi : Khi ngun A7 ( A8 ), khiExciter A4 ( A5 ), khi Modulator/ Power amplifier A2 ( A3 ). Phnchung cho chai my gm :

A6 : Power panel Bng iu khin ngun AC - DC

A1 : Control/ Monitor Bng kim tra iu khin

A9 : Harmonic filter Blc sng hiA10 : Monitor/ Interface panel Bng giao tip u ni

2. Bng kim tra, iu khin ( A1 ) :

Cho php kim tra v iu khin cc thng tin, thao tc sau ( H 4-2 ) :

a. Kim tra ngun : Kim tra -15V DC , + 15V DC, + 24V DC, B _ ,dng ca chai my.

b. Kim tra cng sut sng ti, sng phn x, su iu ch.

c. Kim tra tn hiu m thanh theo Key .

d. Chn my main/ Standby ; Chn chiu khin ti ch, txa ; Chophp Monitor gim st hoc ngt trong khi cc iu kin tt, chuyn mybvi phm.

e. Hthng n bo Alarm :

- Bo qu iu ch( OVER MOD )


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- Bo sng di ln ( SWR )

- Bo tt my ( SHUT DOWN )

- Bo ngun AC c sc( BATTERY )

- Bo my pht Standby ang hot ng ( STANDBY )

f. Cc u Jack kim tra tn hiu : RF, Audio .3. Khi iu ch/ Khuych i cng sut A2 ( A3 ).

Cu to gm c ( Hnh 4-3 ) :

- 04 khi Modulator c nh du A1, A3, A5, A7

- 04 khi Power Amplifier c nh du A2, A4, A6, A8

Tng khi c nhim vging nhvmch A6 ca ND 500.4. Khi kch thch A4 ( A5 ) :

Bao gm cc vmch sau :- Vmch to Keyer - A1 ( ging nhvmch A3 ca ND 500 )

- Vmch kch thch iu ch- A2 ( ging nhvmch A4 ca ND500 )

- Vmch to dao ng rf - A3 ( ging nhvmch A2 ca ND 500)

- Vmch kch thch khuych i A4

- Vmch n p + 15DC v - 15V DC ( Hnh 4-4 )

5. Khi ngun A7 ( A8 ).Lm cc nhim v:

- Ly in p xoay chiu tin mng ( my n) c ththay iu vo cho ph hp ( xem bng 4-1 ) to ra cc in p mt chiu ;B- , + 24 V, + 15V.

- Khi in p u vo gim 10% in p danh nh, s t ngchuyn sang ngun Acqui sdng.

6. Blc sng hi A9.

Chc nng ging nhvmch A7 ca vmch ND 500 .7. Bng giao tip u ni A10 .

L mt hthng ni dy phc vcho cc chc nng ca Monitor. Vmch Monitor nm trong A10, chc nng cng ging nh Monitor caND 500.III. GII THCH SMT MY ND 4000


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1. Trn bng kim tra, iu khin ( A1 ).

Hon ton ging nhtrn mt my ca ND 500 ( Hnh 4-2 )2. Trn khi iu ch/ Khuych i cng sut A2, A3.

- Cc n Led vng di khung PA VOLTS c k hiu t1 4 , cc

n ny sng ln thhin cc biu chA1, A3, A5, A7 hot ng ( xemHnh 4-5 )

- n Led B - : Sng ln thhin c in p B - cung cp ti khiny .

- TP 1 : im kim tra, cho mt in p u ra trung bnh ty thucvo cng sut ra.3. Trn khi kch thch A4, A5 ( Hnh 4 - 6 ).

- Cc n Led RF DRIVE , MOD DRIVE trong khung chALARMchthchc nng ging nhND 500.

- Cc cng tc KEYING ( ON/OFF ), MOD ( ON/OFF ) chc nngging nhND500.

- Chit p PWR TRIM LOCAL : Cho php iu chnh ni blm gim cng sut sng mang nhng khng lm gim su iu chtrong qa trnh kim tra my. Thng thng t tn cng pha bn phi.4. Trn khi ngun A7, A8. ( Hnh 4 -7 )

a. Trong khung chPOWER :

- Cng tc AC LINE ( ON/OFF ) : Cung cp hoc khng cp in

xoay chiu cho khi ngun.- Cu ch 30 A - SLOW : Cu ch tc ng chm 30 A.

- n Led DC SUPPLY : Chthin p B- khi n Led sng ln.

b. Trong khung chCONVERTER :

- n Led +24 V : chth c in p B- cp n bi in tB-sang +24 V v c +24 V khi Led sng.

- Cu ch 1A : Bo vngun +24 V khi qa ti.5. Trn bng iu khin ngun AC-DC.( Hnh 4-8 )

a. Trong khung chPOWER :

- Cng tc AC LINE ( ON/OFF ) : Cung cp hoc khng cung cpin xoay chiu cho ton b thit b.

- Cng tc BATTERY ( ON/OFF ) : Cung cp hoc khng cung cpin mt chiu ( Battery ) cho ton b thit b.


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- Cu ch BATTERY - SLOW : Cu ch tc ng chm 30 A bo vngun BATTERY khi qa ti.IV. HTHNG NG-TEN ( HNH 4-9 )

- ng-ten sdng cho i NDB ND 4000 cng l dng ng-ten c

hsphm cht cao. Polestar B series do hng Millard sn xut theo thitkca hng Nautel.

- Vsliu kthut : Hin nhin Polestar B series c thit kchoND4000 nn chkhc nhau vcng sut RF a n u vo ca ng-ten.

- Vmt phn x: Btr nh mt phn xca ND 500 nhng c18 tia, mi tia di 500 feet.V . HTHNG CP NGUN

Ging nhhthng cp ngun ca ND 500.VI . HTHNG CHNG ST

Cn phi chnh Spark gap cho ph hp ( Bng 4-2 )VII . HTHNG MY THU MONITOR

Ging nhND500VIII . BNP ACQUY

Bnp Acquy ca ND 4000 khc ND 500 cc im sau :

- Tn gi ca Nautel : NAB 8

- in p np ( lc cha c ti ) : ( 6484 ) V

- Dng in np : ti a 7A


- C n Led vng chthbnp ang hoc khng hot ng.


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CHNG V

KIM TRA BO DNG THNG THNG I NDB

I. KIM TRA NH GI I NDB HOT NG TRONG IUKIN CHO PHP1. Vi i NDB ND500.

Hot ng tt khi :

a. Vtr cng tc : ( xem bng 5-1 )

b. Chthca cc n Led :

- Led xanh AC : sng

- Tt ccc n Led trong khung chALARM u tt.

- Led vng trong khung chCONTROL tt.- Led vng trong khung ch MONITOR tt.

- Led STALL trong khung chATU thnh thong chp.c. o cc tham s:

- o ngun

- o cng sut sng ti

- o cng sut sng phn x.

- o su iu ch

ng theo yu cu.2. Vi i NDB ND4000.

Hot ng tt khi :

a. Vtr cc cng tc : ( Xem bng 5-2 )

b. Chthca cc n Led :

- Trn khi ngun : Led xanh DC Supply chai ngun u sng,Led xanh +24 V ngun ca my no c chn ang lm vic ssng .

- Trn khi Exciter : Cc n Led trong khung chALARM lRF DRIVE, MOD DRIVE v Led vng Audio limiter u khng sng.

- Trn khi Modulator / Power amplifier : Khi no ca my cchn ang lm vic th cc n Led vng PA VOLTS 1, 2, 3, 4 v n Ledxanh B- s sng, cn khi ca my Standby th chc Led xanh B- sngln m thi.


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- Trn bng iu khin / kim tra : n Led vng trong khung chCONTROL v MONITOR khng sng ; Cc n Led trong khung chALARM khng sng ( nu Led STANDBY sng ch th mySTANDBY ang hot ng ) ; n Led xanh trong khung ch TX sng .c. o cc tham s:

- S dng ng h o DC VOLTS , DC AMPERES v cng tcchuyn mch thang o pha phi kim tra cc in p DC : -15 V,+15 V, +24 V , B- v dng DC. Chso c phi t yu cu .

- S dng ng h o RF KILOWATTS, MODULATION % vcng tc chuyn mch thang o pha tri kim tra cc tham s: cngsut sng ti (FWD PWR) ; cng sut sng phn x(REFL PWR ); su iu ch(MOD ). Chso c phi t nhkhi t ban u.

- Bt cng tc khung chSPEAKER vvtr ON v iu chnh chit

p m lng th nghe c tn hiu Ident ca i.3. kim tra khnng tt v chuyn my.

Trn mt chcho php kim tra khnng chuyn my v tt my khimt tn hiu Ident. Vic kim tra c tin hnh nhsau : ( Xem cchH5-1 )

- Vi ND500 vtr cng tc nhbng 5- 1, vi ND 4000 vtr cngtc nhbng 5-2.

- Tt cng tc KEYING v v tr OFF trn my ang hot ng(my Main : A hoc B ).

- Khong 20 sau ( c thiu chnh t20 80 ) , my main ( Ahay B) chuyn sang my Standby ( B hay A ).

- Tip tc tt cng tc KEYING ca my standby.- Khong 20 my Standby tt v n SHUTDOWN sng ln

4. Kim tra khnng hot ng ca ATU.

a. Vi my ND 500

Vic iu khin ATU nm ti mt my chnh.

- Trong qa trnh lm vic thnh thong thy n Led STALL chp

l ATU ang lm vic .- n nm INCEASE hay DECREASE thy motor quay l hthng

ATU ang lm vic.b. Vi my ND 4000 :Vic iu khin ATU nm c lp ngoi ATU.


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- Trong ch AUTO : n Led AUTO sng ln , khi cng tcAUTO/MAN a v v tr AUTO. Quan st thy motor thnh thong cquay.

- Trong chMAN : Cng tc MAN/AUTO a vvtr MAN.

n nm INCREASE hay DECREASE thy motor quay l h thng ATUlm vic.

OFF

ONKEYING t 20

Transmitter Transmitter

main stby

A ( B ) B ( A )

ONKEYING

OFF

t 20

SHUTDOWN

Hnh 5-1


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II. CC HNG HC , SAI ST QUAN ST C TRN MTMY V NGUYN NHN / KHC PHC

1. NDB ND 500 : Xem bng 5-3

2. NDB ND 4000 : Xem bng 5-4

3. Phn hiu chnh khi n Led OVERMOD v SWR sng schng dn tmphn thc hnh.

Bng 5-3

Hin tng Cch khc phc

1. Khi m cng tc POWER v vtr ON- n Led xanh AC v n Led BATTERY khng sng

- Kim tra cu ch 230V/4A hay115V/7A.

- n Led xanh AC khng sng,n Led BATTERY sng nhngmy khng hot ng

- Kim tra cu ch BATTERY 10A

- n Led xanh AC sng nhngmy khng hot ng, dng nghmt my kim tra khng c +15V v +24 V

- Kim tra cu ch REG DC PWR1A

2. Khi n Led RF DRIVE sngln, MOD DRIVE sng ln

- Bo cho Ban kthut - TTBD

3. Khi n Led SWR v LedOVERMOD sng

- Hng dn cch chnh phnthc hnh


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4. Motor ca ATU khng quay khin 2 nm INCREASE vDECREASE

- Kim tra cu ch- Kim tra u jack ni vo ATU

5. Cc sckhc - Yu cu bo co cho ngi phtrch


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Hin tng Cch khc phc

1. Khi cc cng tc AC LINE,

BATTERY trn POWER ON/OFFPANEL c a vvtr ON. Cccng tc AC LINE trn POWERSUPPLY a vvtr ON.- Nu n Led xanh DC SUPPLYkhng sng n Led BATTERYkhng sng

- Kim tra cc cu ch AC LINE 30A

- Nu n Led xanh DC SUPPLY

khng sng, n Led BATTERY sng

- Kim tra cu ch BATTERY 30

A

- Nu n Led DC SUPPLY sng ,n 24V trong khung Converterkhng sng ( Khi cng tc TX - ON)

- Kim tra cu ch 1A khungConverter

2. Khi my anh hot ng quanst thy : Cc n Led PA VOLTS1, 2, 3, 4 chp theo KEY

- Cng sut pht ra yu, kim train p ngun cung cp

3. Cc n Led trn khungALARM ca khi EXCITER sng

- Bo cho b phn sa cha tTBD


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III.KIM TRA THAM SCA I NDB1. Kim tra tham shng ngy.

u gigiao ca trong ngy hoc u gilm vic trong ngy cn phi tinhnh kim tra cc tham s:

- B+ Volts : 48V DC ( 44 54 )V- + 24Volts : 24V DC ( 22 26 )V

- + 15 Volts : 15V DC ( 14 16 )V

- DC Current : ( ty cng sut c t )

- FWD PWR : Cng sut c t

- REFL PWR : 5W Max

- MOD % : 95 % ( ng-ten l tng )

- Cc n trong khung ALARM khng sng .- Khnng chuyn my khi tt KEYING

2. Kim tra tham s theo tiu chun ICAO ( dnh cho nhn vin sacha ).

a. Hng thng :

- Kim tra cng sut ( bng my o cng sut ) .

- Kim tra su iu ch( bng OSC ).

b. Hng qu :

- Kim tra sai s ca tn s lm vic ( sdng Fr.counter c cpchnh xc > 0.0001 ).

- Kim tra sai sca tn sAUDIO .

- Kim tra khnng ca Monitor.3. Cc kim tra khc.

a. Hng tun :

- Kim tra v chy thmy bng Acqui .

- Kim tra cc u ni ca Conector .

- Kim tra khnng hot ng ca ATU.

- Kim tra hot ng ca bnp Acqui.

- Kim tra hthng cp ngun.

- Kim tra hthng Surge Protector.


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b. Hng thng :

- Kim tra cc u ni tip mass.

- Kim tra scng ca dy nu ng-ten.

- Kim tra, v du mtng .IV. CNG TC AN TON

1. Tuyt i khng c thao tc trn trng-ten, ATU v my pht khicha tt my.

2. Tin hnh cng tc sa cha khi c mt t nht l hai nhn vin .

3. Nm vng nhng thao tc vn hnh sdng , xl cc tnh hung cpcu.


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CHNG VI

SNGUYN L CA I ND- 500

I. VMCH NGUN A1 (POWER SUPPLY A1 Pcb).Mch cp ngun cung cp cho thit bcc loi ngun v cc chc nng

sau:

- + 50VDC (B+)

- +24 VDC khng n p

- +15 VDC n p

- H thng Monitor tng chuyn ngun AC sang DC khi ngun ACthp hn danh nh.

- Hthng Monitor tng chuyn tt my khi ngun DC thp hn danhnh.

1.Hthng ngun AC:

- Khi cng tc POWER (S3) t vtr ON, ngun xoay chiu sccung cp thng qua cu ch F2 ( 230V/ 4A hay 115V/7A ty thucvo in p c cung cp) n bin p T1- scp, bin p T1 cchn sao cho ph hp vi ngun cung cp. Thcp ca bin p T1 cnhiu u ra, la chn cc u ra tng ng phthuc vo in p uvo. Vic la chn c chra bng 2-1. Sau c a n bnn2 bn kU1. Di iu kin hot ng bnh thng in p u thcp o c l 57V AC. in p 1 chiu u ra bnn U1 thng quacun chn L1 n in trSHUNT R2.

- Trn u 3(+) v 4(-) ca in trSHUNT R2 c ni n ng hM1 thng qua chuyn mch o TEST (S6) o dng in 1 chiu -DC CURRENT.

- in p B+ c cp n u J1-6 thng qua mch hn chin pgm Q1, CR3, R4, R3 khi in p B+ vt qa 60V DC ( trong trnghp khng ti).

- ng thi u ra ca thcp T1- a n chn 2, 3 ca P1 n vA1dng kim tra in p AC.

POWER TRANSFORMER A1T1- SECONDARY WINDING TAPSELECTION:


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115 VOLT VERSION

AC VOLTAGE NI A1U1-1 N NI A1U1-2 N

95105105115

115130

A1T1- 5A1T1- 6

A1T1- 7

A1T1- 11A1T1- 10

A1T1- 9

230 VOLT VERSION

AC VOLTAGE NI A1U1-1 N NI A1U1-2 N

190211

211234234260

A1T1- 5

A1T1- 6A1T1- 7

A1T1- 11

A1T1- 10A1T1- 9

Bng 2-1

2.Ngun +24V DC khng n p :Bao gm:

- Transistor MOSFET Q2 (IRF 130)

- it Zene CR4 ( 1N5929B)

- Cng vi cc thnh phn kt hp .

Di iu kin hot ng bnh thng, B+ ly tchn 6 J1- 6 qua cuch F3 (1A) n J1-13- R5- cc mng Q2. ng thi tJ1- 13- P1- 9- R3-R11-P1-8- Cc cng Q2. Thng thng 1 in p c27V DC ly tucc ngun ca Q2 lm Q2 c m v s c + 24V DC ly tu ccngun ca Q2. Zene CR4 nhm mc ch lun duy tr +15V t vo cccng Q2. +24V DC a trc tip n J1-7, ng thi qua mch to in p+ 15V DC c n p.

3.Ngun + 15V DC n p :Bao gm:

- Bn p U2 ( MC78T15CK)

- Thyristor Q3 ( 2N3228)

- it Zene CR5 ( 1N5930C)

- Cng vi cc phn tkt hp: C1, C3, C2, R7


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Di iu kin hot ng bnh thng, +24V DC c cung cp n bn p U2. in p +15V DC c n p tu ra U2 qua it Zene CR5,qua tC2 lc v a n J1-8 (9) v J2-1.

it Zene CR5 nhm m bo cho u ra ca U2 c 1 in p khng

vt qu 16V DC. it Zene CR5 sm, do c 1 in p dng cungcp n cng ca Q3, Q3 mra mt ni t in p +24V DC. Cu ch F3sn. My sSHUTDOWN.

4.Ngun 1 chiu :Mch ngun 1 chiu bao gm:

- Cc rle K1, K2.

- it Zene CR6( 1N2984B).

- Cc phn tkt hp.

Di iu kin hot ng bnh thng, rle K1 sc cp ngun, rle

K2 khng c cung cp ngun. Ngun 48V DC tu vo J1-3 s bngt. Nu ngun AC ngt hay thp hn danh nh, rle K1 skhng ccp ngun. Ngun 18V DC tJ1-3 n tip im 1-3 ca K1, qua R1 nin trSHUNT R2 , tin C1 sc np thng qua R1, np n mcca 48V DC. Khi tin C1 np n qa 20V DC , it Zne CR6 sthng v rle K2 sc cp ngun thng qua R7 ni song song R8. Khirle K2 hot ng 4 chp 6, in trR1 bngt mch, tC1 stip tc nptrc tip t 48V DC. in p B+ s c cung cp trc tip t ngunAcqui.

Khi rle K1 bngt in, tip im 4 ngt 6, im t c ngt khimch. in p 1 chiu tP1- 10 ni n J1-15 qua it quang DS9 lmn BATTERY ALARM sng ln.

5.Mch MONITOR in p xoay chiu : Mch Monitor in p xoaychiu bao gm :

- Transistor Q2, Q4.

- Transistor MOSFET Q5.

- Rle K1.

- Cc thnh phn kt hp.

Di iu kin hot ng bnh thng, Transistor Q2 v Q5 scthin p thun v m. Rle K1 c cp in. Mt in p 1 chiu tP1-5cp n J1- 16 qua it quang DS10 lm n AC POWER sng ln.

Nu in p AC thp di mc cho php, in p B+ qua bnn 2 bnk CR1 v CR2, in p trn bchia R1, R2 khng vt qua in pZene ca it Zene CR4. Transistor Q2 s b thin p ngc v tt.


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Transistor Q4 sc thin p thun v m. in trR12 sbni t quaQ4. Q5 bthin p ngc v tt. Rle K1 bngt in, in p 1 chiu tJ1-3 sc ni n u B+ - J1-14/6.

Khi in p AC tr v danh nh, mch tng chuyn v s dng

AC, ngt DC.6. Mch Monitor in p B+ :Mch Monitor in p B+ bao gm:

- Cc Transistor Q1, Q3.

- Transistor MOSFET Q2.

- Cc phn tkt hp.

Di iu kin hot ng bnh thng B+ c cung cp n J1-13vt qua in p Zne ca CR3, Transistor Q1 sc thin p thun,Transistor Q1 m, Transistor Q3 thin p ngc v ng. Mt in p

dng c27V sc cung cp n J1-8 t vo cc cng ca Q2- Q2c thin p thun v m. u cc ngun ca Q2 sc + 24V. it ZeneCR4 hn chin p a vo ca Q2 l 15VDC.

Nu in p B+ b gim di mc danh nh, Zne CR3 s thin pngc v tt, Transistor Q1 sthin p ngc v tt, Q3 thin p thun vm. in trR11 sni t thng qua Q3, cc cng Q2 ni t- Q2 tt.Mt 24VDC u cc ngun . Mt 15VDC u ra U2. My SHUTDOWN.

II. V MCH TO DAO NG RF A2 (OSCILLATOR/ RFDRIVER- A2 Pcb):

Vto dao ng nhm mc ch to ra tn hiu cao tn RF c tn sng bng tn slm vic ca my pht.

1.Mch to dao ng sng mang (CARRIER OSCILLATOR) : Baogm cc transistor Q1, Q2, thch anh Y1 v cc thnh phn kt hp.

- Transistor Q1 cng cc thnh phn kt hp v thch anh Y1 to ra dao

ng c tn sng bng tn sca thch anh. Thch anh Y1 c tn snm trong khong t2MHz n 4 MHz.

- Transistor Q2 cng cc thnh phn kt hp to thnh mt bkhuch im nhm ngn cch tc ng ln nhau gia bto dao ng v bchiatn.


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- TC5 dng tinh chnh sai lch tn sdo bn thn thch anh gy ra(thng thng chvi Hz n vi chc Hz) .

- im kim tra TP1 dng kim tra hot ng ca mch to dao ngsng mang.

2. Mch chia tn s(FREQUENCY DIVIDER):Bao gm bchia tn sU1, cc ng ni chn hschia(chc 3 hsl: 4, 8 v 16) v ccthnh phn kt hp.

Bchia tn sU1 l 1 IC chia tn sdng CMOS (MC 14040B), c 12tng chia. y chsdng 3 hschia l 4, 8, 16 (vi u ra Q2,Q3, Q4).

Tuthuc vo tn ssng mang lm vic m ngi ta chn thch anhv hschia cho ph hp. Vic xc nh mi quan hny cho theo bngsau:

FREQUENCY(KHz)

MULTIPLYBY

CRYSTALFREQUENCY (KH z)

(190250)

(251500)

(501535)

16

8

4

30404000

20084000

20042140

3. Bkch thch cn bng tn hiu RF (BALANCE / RF DRIVE):Bao gm transistor Q3, Q4; b khuch i y ko cp D dng

transistor cng sut mosfet Q5, Q6; Bin p T1 v cc thnh phn kt hp.

- Tn hiu u ra ca bchia tn sU1 l xung vung c bin l +15Vv tn sng bng tn ssng mang c a n bazca transistorQ3 v Q4. Khi xung vung c mc + 15VDC, Q3 phn cc thun (Q3m), Q4 phn cc ngc (Q4 tt), tC9 c np n +15V qua ngnp +15VDC t J1- 1- L3- Q3- C9- s cp T1- t. Khi xung vungtin vmc 0VDC, Q3 phn cc nghch (Q3 tt), Q4 phn cc thun

(Q4 m), tC9 phng in ng phng +C9 - Q4 - t- scp T1-C9. Kt qul sc dng chy qua scp bin p T1, dng ny c bin+ 15VDC v tn sng bng tn ssng mang.

- Thcp ca bin p T1 gm 2 cun, mi mt cun c ni n cccng v cc ngun ca MOSFET Q5 & Q6. in p cp n cc cngca Q5 slch 180(ngc pha) so vi in p cp n cc cng ca


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Q6. Ngha l khi Q5 dn th Q6 stt v ngc li. C ngha l ti imu ra ca bkch thch cn bng tn hiu RF (u ni chung ca haicc ngun v cc mng) (Q5/Q6) sc thi im nhn c tn hiu cbin l B+ v c thi im nhn c tn hiu c bin l OVDC.

- u ra J1-4 (RF DRIVE) c cp n vmch iu chv khuch icng sut A6. u ra J1 6 sau khi qua btch sng nh CR3 & C13c cp n vmch kch thch iu chA4. im kim tra TP4- kim tra hot ng ca bkch thch cn bng tn hiu RF.

III. VMCH TO TN HIU NHN DNG A3 (KEYER A3 Pcb):

1. Keyer l mt khi bao gm cc mch logic, to ra cc tn hiu m(400Hz/ 1020Hz) theo Key 1 cch tng dng iu ch my pht.Chu kpht m gm 64 bt vi thi gian l 8s. di ca mt Dot (1 bit)l 125ms, di ca 1 Dash (3 bit) l 375ms.

2. Bto dao ng thi gian gm khuch i thut ton U2A v cc thnhphn kt hp- l 1 btdao ng to ra tn hiu xung vi tn s64Hz .u ra ca bto dao ng thi gian c thc kim tra ti im kimtra TP1.

3. Bm nhphn 12 cp gm bm U3 v cc thnh phn kt hp. 12u ra c nh du tQ1 n Q12, chia tn hiu ca b to dao ngthi gian theo cc hschia t24096 ty thuc vo u ra c chn.Tn hiu mi u ra t Q1 n Q12 l 1 xung vung c bin +15V vitn stng ng.

4. Cc u ra t Q5Q8 ca bm U3 c ni n cc u vo iukhin m ha nhphn ca cc bm ha U4 v U5. u ra Q9 cng viU2B v cc thnh phn kt hp khc to thnh mch chn U4 hay U5 csdng u tin. Cc u Q10Q12 c ni n cc u vo iu khinca bchn khung U6. Bng vic ni di cc u ra t X0X7 ca U6n cc u SPACE (s2) v MARK (s1), ni dung ca khung scchn. Cc u ra ca bchn khung U6 bt u chu k tu ra X0 vtip tc tun tn X7. Mi u ra tng ng vi 1 khung ring bit l 8s.Ni dung ca khung c thl 1 tone MARK, SPACE hay m hiu ca i.

5. Cc bkhuch i thut ton U7A/ U7B v cc thnh phn kt hp tothnh mt mch dao ng n nh cho php to ra mt dao ng hnh sinvi tn sdao ng n nh l 1020Hz ( hoc 400Hz), ty thuc vo vicsdng mch hi tip ( ni B-C to 1020Hz v ngt B-C to 400HZ).

6. Cc u vo EXTERNAL TONE: Cho php sdng tn hiu AUDIOiu chtbn ngoi ( lc ngt JUMP A ) ; KEYING OVERRIDE chophp sdng Key tbn ngoi ; u STBY2 cho php to ra 1 Dot khi bt


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u pht tn hiu nhn dng (nu ni t u STBY2); u STBY1 chophp to ra (1 qung trng = 1 Dot ) chn vo gia khong trng gia tth2 v th3. (M phng theo hnh v- Hnh 2-31 & Hnh 2-32).

7. Cc u ra X0, X1, X2 ca b dn knh U4 lun lun c ni n

BUS khong trng . bo m c 1 qung khong trng= 6 bits xuthin trc khi bt u c tn hiu nhn dng ca i. u ra X3 th khngc ni bi v phn tu tin ca bt kthoc sca tn hiu nhndng l 1 du dot.

8. a chm bao gm cc u ni TB1 v TB2 , ti cc u ni ny thchin vic hnh thnh tn hiu nhn dng ca i NDB. Nu khng c vicni gia TB1 v TB2 (tc ci t tn hiu nhn dng) th u ra ca Keyers l 1 chui lin tc cc tn hiu dot (.) . u ra Q4 ca U3 c tn hiuxung vung, tn s4Hz thng qua R15- CR7- iu khin tt mU1D.

a.Khi u ra c ni n DASH- cng lp trnh DASH U1A sm.+15V thng qua R12 U1A CR7. iu khin tt mU1D. Khong thigian mU1D khi c sni n DASH tng ng l 2 bit (2 dot).

b.Khi u ra c ni n SPACE 1 Cng lp trnh SPACE U1B mv ni t U1D. Khong thi gian ni t (tt) U1D Khi c sni nSPACE 1 tng ng l 2 bit.

c.Khi u STB1 (J1-2) c ni t v u ra c ni n SPACE2.Cng U1C smv ni t Ant it CR1. iu ny slm cho btodao ng thi gian m chm li (tn sgim) bng 1/3 tn schun (f

gim 1/3 dn n T tng 3).d.Khi u STBY 2 (J1- 4) c ni t, ant CR4 c ni t, tn hiuu ra ca X15 c ni t. Do khng lm mcng U1/B ngnmch tn hiu tQ4 a n .Tn hiu ny c trc tip a n U1D-12 thng qua CR7, lm xut hin 1 dot u tin ca tn hiu nhn dng.

Ci t tn hiu nhn dng cho i NDB.

- Chn Tone cho tn hiu nhn dng: 1020Hz hay 400Hz .

- Thit lp IDENT theo m MORSE.

-

Khung m tn hiu nh

n d

ng g

m 64 bit, 7 bit

u tin l kho

ngtrng, bit th8 l dot, tbit th9 n bit th58 smang ni dung tn

hiu nhn dng, 6 bit cui cng l khong trng.

- Hnh vchra cch to IDENT XYZ (Hnh 2-3-3).

IV. V MCH KCH THCH IU CH A4 (MODULATORDRIVER A4 Pcb):


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V mch kch thch iu ch x l tn hiu m thanh v bin i tnhiu m thanh c xl thnh tn hiu iu chrng xung m tnhiu ny cha thng tin vtn hiu m thanh v mc cng sut sng mang.Cc mch Logic kim tra mc MOD DRIVE v RF DRIVE c a ncc n bo ng MOD DRIVE v RF DRIVE trc mt my. Khi ccngng ny bvt qu mc cho php.

1.Chuyn mch cho php iu ch:Bao gm- Chuyn mch tng tU1B/U1C

- Bkhuch i thut ton U6A

- Chit p iu chnh M% R2

- Cc phn tkt hp khc

Di iu kin hot ng bnh thng, tn hiu m thanh c m ho

trn J1- 6 (KEYED TONE) c cung cp qua tC26, R2, R3 n chuynmch U1B- 4. Chuyn mch MOD S2 t vtr ON, + 15VDC c cpn J1-5(MOD ENABLE) qua R43 n U1B- 5, U1C-6 lm 2 chuynmch ny m. Tn hiu m thanh c m ha c cung cp qua 2chuyn mch ny qua C4 n u o ca U6A-2 . Mt mc thin p ct n u khng o ca U6A-3 qua bchia in p R5-R6-R7, mc nyxc nh cng sut sng mang u ra cc i ca my pht. u ra U6A-1cp thng qua R8 n bchia tn hiu tng tU3. Ti u ra UA6-1 c 1im kim tra (TP1).

2. Bbin i +15VDC thnh 15VDC :Mch ny bao gm:

- Cc cng o tU2A U2F

- Cc TRANSISTOR Q8, Q9.

- Cc thnh phn kt hp khc.

Cc cng o U2A, U2B cng R41, R42, C3 to thnh mch t daong to ra 1 dng xung vung vi bin l +15V v tn sl 36KHz.u ra U2B-4 c cp n 4 cng o U2E-11, U2D-9, U2F-14, U2C-7v cung cp dng kch cho TRANSISTOR Q8/Q9. Cp TRANSISTORkch thch cn bng Q8/ Q9 sc tt hoc mtheo tn hiu xung vung

c bin +15V. u ra ti im ni emitchung ca Q8 /Q9 qua tC6.CR4 cho php phn tn hiu m ca xung vung c duy tr. Blc CR5-C25 slm bng tn hiu xung to tn hiu 1 chiu 15V.

3. Bto dao ng xung vung PWM:Mch ny bao gm:

- Bto thi U4.



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Tn sdao ng c iu chnh 70KHz nhtC11. u ra ca bto dao ng xung vung PWM l tn hiu xung vung 15V vi tn s70KHz cung cp n btch phn to xung rng ca PWM.

4. Bto xung rng ca PWM:Bao gm.

- Khuch i thut ton U7A- Cc thnh phn kt hp

Xung vung bin 15V cung cp n u o ca U7A-2. TC16,R32 to thnh mch hi tip ca U7A. Kt qa u ra U7A-1 s c mtdng xung vung rng ca. TP3 l im kim tra, chit p R26 (RAMPADJ) dng t in p nh ca xung rng ca trng vi im zero cain p mt chiu.

5. Bto xung c rng xung thay i: l mt bkhuch i vi sai mn so snh gia dng tn hiu xung rng ca tuyn tnh vi tn hiu mthanh to ra mt dng tn hiu xung chnht vi tn sl 70KHz chnh l tn hiu iu chtheo rng xung. Mch bao gm:

- Khuch i thut ton U7B.

- Transistor Q4, Q5

- Cc thnh phn kt hp

Mt phn ca tn hiu m thanh c cung cp n u vo khng oca U7B-5 tchit p R31. Bkhuch i m n vU7B cung cp inp ny n Bazca Q5. in p rng ca tU7A c cp n Bazca

Q4.Gi s tn hiu m thanh ban u l mt in p chun mt chiu m

khng cha thnh phn m thanh. Khi in p rng ca tuyn tnh m hnin p chun mt chiu, Q4 sc thin p thun v Q5 sc thinp nghch. Khi in p rng ca tuyn tnh t m hn in p chun mtchiu, Q5 sc thin p thun v Q4 sc thin p ngc. u ra Collector ca Q5 sxp x0 vn. Khi Q4 c thin p nghch v ngcli u ra Collector ca Q5 sxp x+15V khi Q4 c thin p thun.

Khi tn hiu m thanh c cng dn ln trn mc in p DC chun,

tn hiu m thanh u vo cung cp n Bazca Q5, slm m hn hoct m hn theo iu chca tn hiu m thanh v chu kthay i y sphthuc vo bin ca thnh phn tn hiu m thanh. Khi n m hn, Q5 sthin p ngc trong 1 khong lu hn ca tn hiu xung rng ca tuyntnh. Ngc li khi n t m hn, Q5 s thin p ngc trong 1 khongngn hn ca tn hiu xung rng ca tuyn tnh. Khi mt tn hiu m thanhhin din, kt qa u ra ca Collector Q5 sl 1 xung chnht c


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rng xung thay i theo bin ca tn hiu m thanh vi chu kxung l70KHz. C im kim tra TP4.

6. Bsuy gim tuyn tnh:Bsuy gim tuyn tnh bao gm:

- Bkhuch i thut ton U5A, U5B

- Cc TRANSISTOR Q1, Q2

- Cc thnh phn kt hp

Bkhuch i thut ton U5B v transistor Q2 hnh thnh mt it ni t cho Emitca Q2, kt qa l EmitQ2 c cp mt in p xpx0.6VDC.

Thng thng th in p iu khin c cp n u khng o caU5A tSWR CUTBACK J1-4 l OV. Tn hiu iu khin OV ny ccp n Baz Q1 thng qua b khuch i n vU5A, Q1 s thin p

ngc v tt, hnh thnh 1 trkhng cao gia tn hiu AUDIO v t.Khi c tn hiu VSWR CUTBACK dng cung cp n U5A-3, u ra

U5A-1 c mc dng, Q1 thin p thun v m, tr khng ca b suygim tuyn tnh sgim tlvi dng chy qua Q1. Hssuy gim sthayi tlvi tn hiu VSWR CUTBACK c cung cp n tJ1- 4.

7. Mch b in p khi c sthay i in p B+:Bao gm:

- Bchia tn hiu tng tU3

- Bkhuch i thut ton U6B

- Cc thnh phn kt hp.Mch b nhm bo m cho su iu ch v cng sut u ra l

khng i nu c sthay i in p B+ xy ra, ng thi cng cung cpmt phng thc iu chnh cng sut u ra txa theo phng thc iuchnh tng gim in p + 15VDC theo ng J2-4.

Cc u vo: Tn hiu m thanh c m ha, in p B+ v u iuchnh cng sut txa c a n U3. u ra ca U3 c a n uo ca U6B-6. u ra U6B-7 c im kim tra TP2.

Bt kmt sthay i no ca B+ khi a nU3-5 sdn n c s

thay i tng ng trn u ra ca U6B-7 . Tng ti vi sthay itng hay gim ca in p +15VDC trn u vo U3-1.

8. Mch ct btn hiu RF mc thp :Bao gm:

- Bkhuch i thut ton U9A

- Cc cng o U8A ; U8B


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- Transistor Q3

- Cc thnh phn kt hp

Mt in p mt chiu tng ng vi mc RF c cp n J1-1 nu vo khng o U9A-3. Mc thin p chun a n u vo o U9A-

2 qua bchia R33/ R47/ R34.Khi bt u mmy, mc RF c cp n U9A-3 khng vt

qa mc thin p chun, Q3 c thin p thun v m, u vo U9A-3 sc ni t. Do u ra U9A-1 smc thp.

Mc thp ny cp n U8A, U8A-2 c mc cao. Mt u mc cao quaCR3 a n U8C-7 cm tn hiu MOD DRIVE, u cn li a n U8B-5, u ra ca U8B-4 l mc thp a n J2-5 lm n RF DRIVEALAMR sng ln.

Sau thi gian khong 5s, mc RF cp n U9A-3 svt qa mc thinp chun, u ra U9A-1 smc cao. Transistor Q3 sthin p ngc vng. u ra ca U8A-2 smc thp. u ra MOD DRIVE skhng bcm lu hn, ng thi u ra U8B-4 s mc cao n RF DRIVEALARM stt.

9. Mch kch thch cn bng:Mch bao gm:

- Bkhuch i m U8C

- Cc Transistor Q6, Q7

- Cc thnh phn kt hp

c hnh thnh tmch kha chuyn mch, kha chuyn mch nyc kch bi tn hiu iu chrng xung.

Tn hiu c iu chrng xung c o cc bi khuch i mU8C, cc Transistor Q6, Q7 sng ngt theo tn schuyn mch ca tnhiu PWM. Hot ng chuyn mch ca cc Transistor Q6/Q7 bo mcc bin u v cui ca xung hnh chnht l thng.

u ra MOD DRIVE c ni n J2-8 l tn hiu c iu chtheorng xung c bin chuyn mch gia +15VDC v t.

10. Btch li rng xung:bao gm:- Bkhuch i thut ton U9B

- Bo U8D

- Rle K1



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Dng kim tra tn hiu iu ch rng xung theo cc xung+15VDC xut hin. Mt b lc thng thp 2 khu gm R37/ C21 vR38/C22 kim tra mt cch lin tc u ra ca tn hiu MOD DRIVE theosxut hin ca cc xung dng. Khi c xung dng xut hin, tC21 sc np n mt gi tr trung bnh phthuc vo tstt/ m. in ptrn tC22 sc cp n u vo U9B-5, in p ny skhng vtqa in p chun c cp n u vo o ca U9B-6 t+15VDC quabchia in p R39/ R40. Kt qu l u ra ca U9B sni t, u raU8D s l +15VDC. Mt tn hiu bo ng v MOD DRIVE s khngc cung cp n J2-6.

Nu in p trn C22 vt qu in p chun c cp n u vo oca U9B-6, u ra U9B-7 sc 1 in p +15VDC. Rle K1 sc cpngun v ngt tn hiu MOD DRIVE n J2-8. u ra U8D-15 c mc 0,n MOD DRIVE ALARM DS3 sc sng ln.

V. VMCH KIM TRA-IU KHIN A5 (MONITOR A5 PC):1.Gii thiu chung:V mch MONITOR dng kim tra cc tham sin hnh ca my pht v cc tn hiu iu khin ti chtheo stt / mca cc n PANEL pha trc mt my.

Cc chit p dng iu chnh cc tham s: Ngng bo ng cacng sut, ngng bo ng ca su iu ch, thi gian gichm tt/chuyn my, cc ccu hiu chnh cng sut sng ti, cng sut sng phnx.

Cc u ra iu khin txa kim tra c : Trng thi ngun hotng (AC hay DC), tn hiu AUDIO, trng thi SHUTDOWN, trng thiSWR.

2. Mch hiu chun cng sut sng ti (FORWARD POWERCALIBRATION).

Mch hiu chun v kim tra cng sut sng ti (FWD PWR CAL) Baogm (Sheet 1 of 2):

- Cc bkhuch i m U1A/ U1D.

- Chit p hiu chun R21.


u vo FWD PWR trn J1-3 c hai thnh phn: Mt thnh phn inp mt chiu tng ng vi mc cng sut, mt thnh phn in p xoaychiu tng ng vi mc su iu ch. Cung cp trn tC19, qua phnp R2/ R9 n u khng o U1A-3. T C3 lc ly thnh phn xoaychiu, ng thi np n mt mc mt chiu tng ng vi mc cng sut.


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u ra U1A-1 c cung cp n R17 v R21, qua J1-4 n ng hoM1. ng thi tU1A-1 cp n U1D-12 n J1-5 kim tra txa.

3. Mch kim tra tn hiu AUDIO:Mch kim tra tn hiu AUDIO baogm:

- Cc bkhuch i m U1B, U2B, U2A. (Sheet 1 of 2)- Cc thnh phn kt hp.

Tn hiu tu ra U1B-7 c tch ly thnh phn tn hiu AUDIO sau a n U2B-5. Cc in trR28, R29, R30 v tC8 quyt nh hskhuch i ca U2B. u ra U2B-7 qua C9 a n J1-6 a n loa LS1.

u ra U2B-7 cng uc a vo u khng o U2A-3 sau an J1-8 kim tra txa.

4. Mch cp ngun +15V DC cho MONITOR:in p B+ c cp n

J3-1 sau thng qua R1, R4, CR3, C20 cp +15V DC cho mchMONITOR (Sheet 1 of 2).

5. Mch tch sng ngng bo ng cng sut:Bao gm (Sheet 1 of 2):

- Bso snh U3C.

- Chit p ngng cng sut R10.


Di iu kin hot ng bnh thng, cng sut sng ti tu raU1B-7 c cp n R10. Chit p R10 c t ti ngng bo ng

(thng thng l -3db so vi cng sut hot ng). Mt in p DC trnR10 c cp n R18, C5 n u vo khng o U3C-11.

TC5 lc ra thnh phn iu chca tn hiu RF v np n mc DCtng ng vi mc cng sut sng mang. in p chun trn U3C-11tng ng vi mc ngng bo ng cng sut sng mang, ngng nyc so snh vi mc in p c thit lp bi cc in trR22, R23 trnu vo o U3C-10.

u ra U3C-13 sl trkhng cao so vi t, c mt in p mc caocung cp cho cc Bazca Q6- Q6 thin p thun v m.

Khi mc cng sut trn R10 gim 3db, u ra U3C- 13 schuyn sangtrng thi c trkhng thp so vi t, c mt in p mc thp cung cpcho cc Bazca Q6- Q6 thin p ngc v ng.

6.Mch tch sng ngng bo ng su iu ch:Mch tch sngngng bo ng su iu chgm:(Sheet 1 of 2)

- Khuch i thut ton U1C.


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- Chit p ngng su iu chR8.

- Mch tch sng ng bQ1, Q2, U3B.


Di iu kin hot ng bnh thng, cng sut sng ti tu raU1B-7 c cung cp n R8 n u vo khng o U1C-10. Chit pR8 c t ti ngng bo ng (thng thng l 4db so vi suiu chc t).

MOSFET Q2 V Transistor Q1 chtch cc tn hiu cng pha vi cctn hiu AUDIO c m ha a n u vo ca Q1. Di iu kinhot ng bnh thng u ra AC ca U1C-8 c cp n u o U3B-4, ti y n so snh vi in p thin p m c thit lp bi R24, R25trn u vo khng o ca U3B-5. u ra U3B-2 l mch vi phn R33-C7. Mch vi phn ny scung cp mt xung dng n Bazca Q6 trong

sut mi ln truyn.n DS1 s chp tt theo tc pht tn hiu AUDIO c m ha.

Khi cc xung dng cp n BazQ4 ngt i, Q4 s thin p ngc vng. Transistor Q5 sc thin p thun v m, n DS1 sng ln. Nun DS1 duy tr vic sng trong mt thi gian lu hn thi gian gichm chuyn tt my th my pht s tt my (Thi gian ny ph thuc vovic iu chnh R41 khong iu chnh t20s80s).

7.Mch iu khin tt my:Mch iu khin tt my bao gm (Sheet 1of 2)

- Khuch i thut ton U4B.

- Chit p gichm R41.

- Transistor Q6.

Di iu kin hot ng bnh thng, Transistor Q6 schuyn mchtt/ m theo tc ca tn hiu AUDIO c m ha (Cc xung dngc ly tmch vi phn). Khi Q6 m, tC10 sphng in qua Q6 nit v in p trn u khng o ca U4B-5 st dng hn in p trnu o ca U4B-6. Mt in p thp sxut hin trn u ra U4B-7 v

J4-8 (SHUTDOWN ALARM). n SHUTDOWN ALARM trn PANELtt. in p thp cng cp n BazQ7, Trasistor Q7 sthin p ngc vtt. Tn hiu iu khin INHIBIT trn J4-7 sl mt COLECTOR h.

Nu xung dng tmch tch sng ngng bo ng su iu chkhng xut hin (tng ng vi vic mt tn hiu IDENT, mc cng sutgim 3db, mc iu ch gim 4db) trn Baz ca Q6 trong khong thigian t20s 80s, Transistor Q6 tt. Lc tC10 sc np qua R45/


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R44/ R41. Khi in p trn u khng o ca U4B-5 vt qa in pthin p trn U4B-6, u ra ca U4B-7 smc cao.

Mc cao u ra U4B-7 s c cp qua J4-8 n n ALARMSHUTDOWN trn mt my lm n sng ln. Mc cao u ra U4B-7

cng sc cp qua R50 n Bazca Q7. Q7 thin p thun v mvcp mc thp (t) n J4-7 a n mch MONITOR in p B+. Cmvic cp 24VDC, 15VDC dn n SHUTDOWN my.

8.Mch tch sng kim tra sqa iu ch:Mch bao gm (Sheet 2 of2):

- Khuch i thut ton U5A.

- Bso snh U5B.

- Chit p hiu chun OVRMOD CAL R56.

- Transistor Q9.- Cc thnh phn kt hp.

Di iu kin hot ng bnh thng, mt in p mt chiu tlvimc cng sut cng vi mt in p xoay chiu tvi mc su iu chc cp n J2-1. Qua mch tch sng gm CR8, C12 . Tn hiu ctch sng qua ti R53 a n mch hn chgm CR9, R54. Mch hnch ny duy tr u vo ca U5A-2 mt mc in p khng vt qa+15VDC. in trR56 v R55 thit lp mt ngng chun trn u U5A-3. u ra U5A-1 sc mc thp, Q9 sbthin p ngc v tt.

Nu in p cp n U5A-2 tr ln thp hn in p chun U5A-3.u ra U5A-1 smc cao. Transistor Q9 sthin p thun v m. TC13 sphng in l nguyn nhn gy ra mc cao u U5B-7. Mccao ny cp n J2-3 n n OVERMOD ALARM PANEL pha trclm n ny sng ln.

9. Mch bo vkhi c hssng di ln:Mch bao gm:

- Khuch i thut ton U9B, U9A.

- Bo U7A.

- Transistor Q11.- Cc thnh phn kt hp.

Di iu kin hot ng bnh thng (Khng c cng sut phn xln) u ra U9B-7 smc thp v mch khng c tc dng. Nu mcin p tng ng vi cng sut phn x trn U9B-5 tr ln dng hnmc in p chun (c thit lp bi R68/ R70 v chit p SWR


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THRESH R69) trn U9B- 6, in p u ra trn U9B- 7 sc nng caoln. Mc in p u ra U9B- 7 sphthuc vo mc in p DC ca tnhiu mu ca cng sut phn x. TC17, R74, R75 dng chng li sthng ging khng mong mun.

u ra U9B- 7 c a n J3- 2 v cung cp n mch suy gimtuyn tnh nm vmch MOD DRIVER (A4). Khi u ra U9B- 7 cnng ln mc cao, u vo U9A- 3 cng c dng hn so vi mc inp chun ( c thit lp bi R79, CR11 khong 0.6VDC). u ra U9A-1smc cao. u ra ny cng c a n 4 mch ring r:

- Mt phn ca u ra U9A sc cp qua R82 v thin p thun choQ11 lm Q11 m. t s c cp n J3- 3 SWR ALARM(REMOTE).

- Mt phn a n u vo ca bo U7A, it CR14, khi u ra ca

U7A mc thp (c sng di ln), CR14 sthin p thun; t sccp n J3- 5 STANDBY 2 SWR. Tn hiu IDENT sc chthiu kin c SWR ln (c tn hiu DOT ban u trc khi c IDENT).

- Mt phn a qua R83 n J3 4 SWR ALARM a n lm sng nDS6 khi tn ti SWR cao.

- Phn cui cng sa n u U3D- 9, u ra ca U3D- 14 sdng mc cao, Transistor Q6 c thin p thun v m. Mch iu khintt my sbcm v my pht skhng bSHUTDOWN khi c SWRcao.

10. Mch kim tra ngun 1 chiu:Bao gm:- Bkhuch i m U6A

- Transistor Q10, Q3

- Cc thnh phn kt hp

Khi my pht lm vic bng ngun AC, u vo J3-7 c mc thp. Mcthp ny cp n U6A- 3 n BazQ10 lm Q10 thin p ngc tt. ura J3 8 l 1 COLLECTOR h. n ALARM BATTERY DS9 tt.

Nu ngun AC c sc, u vo J3- 7 c mc cao dn n U6A- 3

c mc cao dn n Q10 thin p thun v mdn n J3- 8 c ni tqua Q10, ng thi tn hiu mc cao tJ3- 7 n bazQ3, lm Q3 thinp thun v m. Q3 v cc thnh phn kt hp hnh thnh mt mch toxung m lm m tc th Q6 thng qua it CR18 RESET mch iukhin tt my khi ngun AC trthnh ngun dbv my pht ang hotng tngun cquy.


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11. Mch hiu chnh o su iu ch:Bao gm:

- Khuch i thut ton U6B/C/D.


Trn J2 6 c mt in p tlvi cng sut danh nh. u ra U6D-14 c cp n U6C- 10 ng thi cp n R78 n J2- 4 dn n chitp R2 (SET 100% REF) (trn mt my). Mt mch tch sng nh gmU6C, it CR13, R81, tC18 tch tn hiu tU6D- 14 v cp 1 tn hiuDC qua bm U6B n J3- 6.

Khi chuyn mch TEST S6 t vtr MOD-READ, ng hscni n gia J2- 4 v J3- 6. iu chnh 100% chuyn mch S6 st vvtr MOD- REF.

12. Mch hiu chun cng sut sng phn x:Bao gm:

- Cc khuch i m U8A, U8B.- Chit p hiu chnh R80- REFL PWR CAL

- Cc phn tkt hp.

Di iu kin hot ng bnh thng mt in p mt chiu tngng vi cng sut sng phn x cp n J1- 1 dn n C25 dn nR63/R66 dn n U8B-5. C25 c np n mt gi trtrung bnh tngng vi REFL PWR. u ra U8B-7 c a n R76 v R80 REFL PWRCAL v a n J2-7 n chuyn mch S6 thc hin php o.

Chit p R80 dng hiu chun thang o cho ng hM1. u J2-8ly tu ra U8A-1 dng thc hin php o txa.

13. Mch iu khin BYPASS:

Di iu kin hot ng bnh thng u vo BYPASS J4- 4 cni t. Mch BYPASS khng c tc dng.

Nu mch BYPASS hot ng (cng tc vvtr BYPASS) J4- 4 bht, Q7 tt bt chp mi tn hiu tu ra U4A. Mch SHUTDOWN sbcm v my pht vn duy tr shot ng.

VI.V MCH KHUCH I CNG SUT A6 (AMPLIFIER/

MODULATOR A6 Pcb).1. Gii thiu vbkhuch i cng sut chD.

a.Bkhuch i cng sut chD n gin (hnh 2-6-1):

- Gm ngun B+ c ni n chuyn mch (thc tl 1 MOSFET) nblc v cp n ti.


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- Nu chuyn mch ng / m vi DUTY CYCLE l 50% theo tn sng bng tn ssng mang th sc 1 xung vung xut hin u voblc.

- Blc c thit klc ly thnh phn ng bng tn ssng mang

v lm suy gim ng k cc hi th u ra ca b lc sxut hin 1thnh phn xoay chiu hnh sin.

b. Bkhuch i cng sut chD y ko (PUSH PULL VERVION)(Hnh 2-6-2):

- Nu thay thchuyn mch S bng 1 chuyn mch kp S1/ S2, hai uca chuyn mch S1/ S2 c ni n scp ca 1 bin p T, thcpca bin p c ni qua blc n ti ta sc mt bkhuch icng sut y ko chD.

- Dng chy cung cp tB+ n scp bin p T ln lt chy qua theochiu ngc nhau ty thuc vo chuyn mch S1 hay S2 c ni nngun.

Blc cng slc ly tn hiu tthcp bin p T v cung cp n ti1 tn hiu hnh sin tng ng.

c.B khuch i ch D kiu cu CASCODE (CASCODE BRIDGEVERSION)

WAVE

SQUARE

SINE

WAVE

B+

LOAD

S

FILTER

Hnh 2-6-1

FILTER

LOAD

T

SINE

WAVEB+

S2

S1

Hnh 2-6-2


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(Hnh 2-6-3)

- Nu thay th chuyn mch 2 cc S1/ S2 bng 4 chuyn mch 1 ccc trnh by nhhnh v, ta sc cu hnh ca bkhuch i chD kiu cu CASCODE.

- Hot ng ca bkhuch i chD kiu cu CASCODE cng gingnhbkhuch i chD kiu y ko.

d.Bkhuch i chD kiu cu CASCODE dng TRANSISTORMOSFET

- Trong bn chu ku, tn hiu + c a n cc ca Q1 v Q4, lmQ1 v Q4 thng, Q2 v Q3 tt. in p B+ chy qua Q1 dn n cunscp T2 dn n Q4 dn n ni t kn mch dng chy.

- Trong bn chu ksau, tn hiu + c a n cc ca Q2 v Q3, lmQ2 v Q3 thng, Q1 v Q4 tt. in p B+ chy qua Q3 dn n cunscp T2 dn n Q2 dn n ni t kn mch dng chy.

- Thcp T2 cung cp 1 in p xoay chiu n lc (FILTER) dn nti. Cchhot ng nh gii thiu phn trn.

- Nu in p B+ c duy tr l 1 hng sth u ra bin p T2 sc 1dao ng RF khng i. Nhng nu in p B+ c thay i theo 1mc xung quanh gi trB+ trung bnh theo 1 qui lut AUDIO no .Th tn hiu u ra ca T2 sc tn hiu RF c bin thin theo quilut ca tn hiu AUDIO. chnh l kt qa ca vic thc hinphng thc iu bin.

T

OUTPUT

S2.B

B+

S2.AS1.A

S1.B

RF

Hnh 2-6-3


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(Hnh 2-6-4)

2. Vmch iu chv khuch i cng sut A6.

Cu to: gm 2 phn.

- Phn thc hin iu chngun B+ theo qui lut tn sAUDIO.

- Phn khuch i tn hiu RF.a. Mch iu chngun B+: Gm:

- MOSEFT Q1 (IRF 140) v cc thnh phn kt hp.

- Ly tn hiu tMOD DRIVE a n J1 (u ni bng CORNECTOR),thc hin iu khin ngun B+ thay i theo qui lut tn hiu AUDIO1020Hz (400Hz) c m ha theo KEY.

b. Mch khuch i cng sut chD kiu cu CASCODE.

- Gm: Q2, Q3, Q4, Q5, bin p T1, T2 v cc thnh phn kt hp.

- Khuch i tn hiu RF ly t A2 (A9) a n J2 (u ni bngCONNECTOR), ng thi thc hin iu chbin .

VII. VMCH LC SNG HI A7 (HARMONIC FILER -A7 Pcb)

(XEM GIO TRNH)

FILTER.T2

+

Q2

Q4

B+

.

Q3

T1

+

B+

LOAD

+

Q1

Hnh 2-6-4


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VIII. HTHNG TNG IU CHNH CNG HNG (ATU-AUTO TURNING-UNIT):

1.Bd ng b.

Bd ng bc k hiu l vmch A1 ca ATU.

Bd ng biu khin hot ng ca mtcng hng. N duy tr1 cch tng 1 iu kin cng hng v cng c thbiu khin tbnngoi lm quay mttheo 1 hng no .

Bd ng bkim tra mi quan hvpha gia dng v p ca tnhiu RF. Khi hthng c cng hng th dng v p cng pha v khngc bt k tn hiu li no c to ra. Nu c 1 gc pha tn ti, mt tnhiu li sc to ra v l nguyn nhn mtcng hng iu chnhli ca cun dy cng hng L1 di chuyn vhng ph hp (chng linguyn nhn gy ra li).

Tn hiu mu ca dng RF c trch t bin p T1A cm ng quaT1B, thin p thun cho 1 cp it ca hai cu it theo cc bn ktuntca tn hiu mu ca btch sng pha. Cc cu it ny hot ng nhl cc chuyn mch ni tip m cc chuyn mch ny c kch bi tnhiu mu ca in p RF c quay pha 900 bi tC1 a n u voca cc chuyn mch transistor Q2 v Q3.

Nu NG-TEN c cng hng, in p mu ny c 1 gi trtrungbnh l zero. Nu c 1 li vpha tn ti, gi trtrung bnh sc cc tnhph hp (- OR+) thin p thun cho Q2 hay Q3.

Cc transistor Q4 v Q5 trong iu kin bnh thng c thin pthun bi cc in trR3 v R4 v vy + 15VDC c cp n cho c2u ca mtB1.

Cc transistor Q2 hoc Q3 biu khin bi tn hiu li, sc thinp thun v cung cp t cho + 15VDC qua cc it CR12 hoc CR13, timi u mt, cn u kia sc cung cp +15VDC.

Mt thao tc bng tay bn ngoi cng iu khin c mt cnghng quay theo mt hng no , phthuc vo vic n nm iu khinINCREASE/ DECREASE .Bng vic n nm INCREASE / DECREASE

trn PANEL mt my 1 thin p dng scung cp n u vo SERVOINHIBIT lm Q1 c thin p thun v ngt mch tn hiu li. ng thicung cp t n Bazca Q4 hay Q5 lm quay mtB1.

2.Bin p phi hp trkhng.

Bin p phi hp trkhng l mt bin p gii rng dng phi hptrkhng gia ng-ten v my pht. Ti l tng ca my pht l 50,


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trong khi ti thun trca ng-ten kh nh. Gii phi hp u ra ca binp vi ng-ten l (230) .

3.Bd in.

Dng kim tra dng thc tca dng ng-ten.

Khi ni A3TB1-3 vi t bng mt ng hDC AMMETER th miMILLIAMPERE tng ng vi 2A.

Khi ni A3TB1-2 vi t bng mt ng hDC AMMETER th miMILLIAMPERE tng ng vi 10A.

IX. BNP ACQUI 48V(NAB5).

1.Mch cung cp ngun xoay chiu (AC POWER SUPPLY):

- Ngun xoay chiu (115 VOLT RMS/ 50 Hz hay 230 VOLT RMS /60Hz) c ni n TB1-5 (LINE), TB1-4 (NEUTRAL) v TB1-3

(GROUND). Dy LINE (pha) v NEUTRAL (trung tnh) c ni nblc EMI U2 qua chuyn mch S1, cu ch F1. n TB1-1 v TB1-2(hai u scp ca bin p T1).

- S cp bin p T1 c hai cun dy, mi cun s dng cho in p115V. Khi dng in p xoay chiu 115V/ 50Hz th hai cun dy nyc u song song nhau. Khi dng in p xoay chiu 230V/ 60Hz thhai cun dy ny c u ni tip nhau.

- Thcp bin p T1 c hai cun dy cp ngun theo yu cu ca bnp ACQUI. Mt cun cung cp in p 17.5V(u 8 & 9). Mt cun

cung cp in p 75V i xng (75-0-75) (u 5-6-7).2.Mch cp ngun mt chiu khng c n p 23V.(UNREGULATED 23 VOLT DC POWER SUPPLY).

- in p xoay chiu 17.5V c cp n bnn cu A1U1 u ra bnn cu l in p danh nh 23V mt chiu. in p ny khng cn p v cha mt thnh phnnhp nh vi tn sgp i tn scain p xoay chiu.

- in p mt chiunhp nh c cp n u vo o ca khuch ithut ton A1U3A, ng thi thng qua it A1 CR1 n tlc C1, tC1 lm in p 23V trnn bng phng cn tA1C1 dng lc ccthnh phn tn scao khc.

- u m ca ngun 23V mt chiu khng c ni n vmy (t) mni n u dng ca acqui. im ny l mc DC chun i vi tt ccc mch logic.


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- it DS1 ssng ln khi mch cp ngun mt chiu khng c n p23V hot ng.

3.Mch cp ngun mt chiu c n p 15V (REGULATED 15 VOLTDC POWER SUPPLY).

- in p 23V mt chiu sau khi c lc sa n bn p 15VA1U1. u ra ca A1U1 sduy tr mt mc in p + 15VDC so vimc DC chun. A1U1 sloi bcc thng ging vin p ca ngun23VDC.

4.Mch sho (DIGITIZER).

- Mch sha gm khuch i thut ton A1U3A (dng nhmt bsosnh) v cc thnh phn kt hp. Cc in trA1R3, A1R4 hnh thnhmt bphn p v cp mt in p danh nh +0.18VDC n u vokhng o ca A1U3A.

- in p 23VDC nhp nh cha c n p a n u vo o caA1U3A. Khi in p 23VDC nhp nh t dng hn +0.18VDC thu ra ca A1U3A sc mc cao (+23VDC), cn khi in p 23VDCnhp nh dng hn +0.18VDC th u ra ca A1U3A s c mcthp (mc DC chun).

- Ti mi thi im nhp nh ca in p 23VDC nhp nh tngng vi na chu kca ngun xoay chiu th u ra ca A1U3A l mtxung hnh ch nht c rng nh, c tn sng vi tn snhpnh ca in p 23VDC nhp nh hay gp i tn sin p ngun

cung cp.5.Bto in p rng ca (RAMP GENERATOR).

- B to in p rng ca gm transistor A1Q1, cc in trA1R5/R6/R7 v t in A1C4. u ra ca A1U3A sc cp nBazca transistor A1Q1 (dng nhmt transistor chuyn mch). Ccin trA1R5/R6 hnh thnh bphn p bo m cho trn bazcaA1Q1 khng vt qa 2V khi u ra A1U3A mc cao.

- Khi u ra A1U3A mc cao, A1Q1 sthin p thun v m, v ngcli. in trA1R7 v tin A1C4 to thnh mt mch tch phn, c

hng sthi gian tng i di ti cc thi im lp li ca xung u raA1U3A

- Khi A1Q1 m, tA1C4 c phng in qua A1Q1. Khi A1Q1 ng,tA1C4 c np n 23V qua R7, kt quu ra A1Q1 sc mttn hiu rng ca tng i tuyn tnh (RAMP).


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- Hot ng chuyn mch ca A1Q1 c iu khin bi trng thi caA1Q2, m A1Q2 th biu khin bi bnh thi gian 8s . Khi A1Q2m, COLLECTOR ca A1Q1 c ni t, hot ng chuyn mch caA1Q1 b cm. Khi A1Q2 tt, hot ng chuyn mch ca A1Q1 bnhthng.

- Tn hiu u ra ca bto in p rng ca l mt chui xung rng ca8s, c ng bvi thi im khi u ca mi bn chu kin pngun xoay chiu mi khi bnh thi gian 8s c php hot ng.

6.B so snh in p acqui. (BATTERY VOLTAGECOMPARATOR).

- Bso snh in p acqui gm bkhuch i thut ton A1U3D (dngnhmt b so snh), cng OR A1U5D, cm bin nhit U1 v ccthnh phn kt hp. in p t u m acqui cp n b phn p

R2/A1R11, kt qa in p u ni R2/A11 l mt in p m c gitrxp x9% in p acqui. in trA1R22 v it n p A1CR2 tothnh mt mch ghim in p, n c ni gia hai ngun (ngun +15VDC v ngun 9% V BATT).

- in p ti im ni gia A1R22/CR2 c cp n u vo o caA1U3D, in p ny c ghim n mc 9V dng hn in p m tiim ni gia R2/A1R11. in p t vo u o ca A1U3D so vimc DC chun lun lun l in p dng. in p ny cng t dngkhi in p ngun acqui cng ln, cng dng khi in p ngun acquicng thp.

- Cc in trA1R23/R24/R25 v cm bin nhit U1 hnh thnh mtbphn p thhai. Bphn p ny cung cp mt in p mt chiu,cc tnh dng, b nhit v iu chnh c n u vo khng o caA1U3D nhl mt in p chun. Cc chit p A1R24 c iu chnhsao cho cung cp in p chun n u vo khng o ca A1U3Dphi hi dng hn mt cht so vi in p cp n u vo o caA1U3D trong trng hp acqui c np y.

- Khi acqui c np y, in p u vo khng o ln hn in pu vo o nn u ra A1U3D c mc cao (23VDC). Ngc li nu

in p acqui gim, in p u vo o ln hn in p u vo khngo nn u ra A1U3D c mc thp (mc DC chun).

- Cc in trA1R26/R27 to thnh bchia p bo m cho in pcp n u vo ca A1U5B khng vt qa +15VDC khi u raA1U3D c mc cao.


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- Mc ra ca A1U5B phthuc vo u ra ca U3D v Q ca A1U4 . TC8 v in trR21 to thnh mch vi phn, cung cp xung dngging nhu ra ca bso snh in p acqui.

- Khi in p acqui gim di mc chun th u raU3D-14 mc thp,

u vo U5B-5 sc gimc cao v u ra U5B-4 smc thpth bto dao ng thi gian hot ng (chu k8s).

7. Mch nh thi 8s (EIGHT SECOND TIMER).

- Mch nh thi gian 8s bao gm: b nh thi A1U4, cng NORA1U5D, transistor A1Q2 v cc thnh phn kt hp. Mch nh thicung cp mt xung dng c di 8s u ra Q, sau Q strvmc O cho n khi no c xung dng kch thch vo u MASTERRESET (MR-U4-6).

- Khi u ra Q mc thp, u ra U5D-11 mc cao Q2 sthng v s

ngn mch tt c cc tn hiu c to ra t Q1 (RAMPGENERATION).

- Khi u ra Q mc cao, u ra U5D-11 smc thp Q2 tt khnglm ngn mch cc tn hiu c to ra tQ1.

8. Mch iu khin dng np (CHARGING CURRENT CONTROL).

- Mch iu khin dng np bao gm: bkhuch i thut ton A1U3Cv cc thnh phn kt hp, bkhuch i thut ton c ni c khuch i xp x100 ln.

- in p ri trn R1, tng ng vi dng np cho acqui c cp nu vo khng o U3C-10 .B chia in p R17/R18 cung cp mtin p chun (c thiu chnh c) n u vo o U3C-9 . inp u ra ca U3C-8 dng iu khin thi gian mca cc thyristorQ1, Q2 v duy tr dng np acqui mc c iu chnh

- Nu in p ri trn R1 gim, u vo khng o ca A1U3C s tdng hn so vi u vo o. u ra ca A1U3C st dng hn vlm thyristor mtrhn trong mi bn kdng.

9.Mch iu khin ng mTHYRISTOR (THYRISTOR TURN- ON

CONTROL)- Mch iu khin ng mthyristor bao gm: bkhuch i thut tonA1U3B (lm vic nhmt bso snh), transistor A1Q3 (lm vic theochchuyn mch) v cc thnh phn kt hp.

- in p rng ca tuyn tnh c cp n u vo o, in p mtchiu c cp n u vo khng o ca bkhuch i A1U3B . u


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ra ca A1U3B c mc cao (23V) khi in p mt chiu ln hn inp rng ca v ngc li.

- Khi u ra A1U3B c mc cao (23V) th Q3 thin p ngc v tt,ngc li Q3 thin p thun v m . Khi Q3 m ti cc u ni

R13/R15 v R14/R16 c in p kch vo cc cng ccc thyristor Q1v Q2.

10. B nn hai bn k chuyn mch ( SWITCHED FULL WAVERECTIFIER)

- B nn hai bn k c chuyn mch bao gm: cc thyristor Q1, Q2(c ni nhmt bnn hai bn k), it CR1, cun chn LI v thcp bin p T1 (gm hai cun mc i xng 75V-0-75V).

- Cc in p xoay chiu 75V c cp n ant ca cc thyristor Q1vQ2 ngc pha nhau, cc thyristor Q1 v Q2 ln lt tt, dn theo in

p xung kch vo cc cng. Thi gian mcc thyristor phthuc vovic iu khin cng dng np.

- Cun cm L1 v tin trong ca bnh acqui ng vai tr nhblcv lm bng phng dng np.

CHNG VI

SNGUYN L CA I ND- 4000


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I. KHI CP NGUN (POWER SUPPLY MODULE) :

C hai khi cp ngun cung cp ring bit cho hai my pht A&Bc k hiu l A7 v A8. Khi cp ngun A7 s c hot ng khichuyn mch chn my pht chnh SELECT MAIN TX c t vtr

A v ngc li khi cp ngun A8 sc hot ng khi chuyn mchchn my pht chnh SELECT MAIN TX c t vtr B.

Khi ngun bao gm 4 thnh phn chyu sau:

- Bin p ngun v hthng bo vv nn in.

- Vmch iu khin A1 (CONTROL PCB)

- Vmch kim tra ngun xoay chiu A3 (AC SUPPLY MONITOR)

- Vmch bin i in p A2 (B-VDC TO + 24VDC CONVERTOR)

1.Bin p ngun v hthng bo v& nn in.

- in p 220V xoay chiu tJ1-1 v J1-2 a n chn 1 v chn 2 cacng tc ngun S1, qua cu ch F2 v F3 n scp bin p ngun T1.Thcp bin p ngun T1 gm 2 cun. Cun c in p cao c quni xng (chn 8 v 10 i xng qua 9) v cun c in p thp cngc qun i xng (chn 11 v 13 i xng qua 12).

- Tuthuc vo gii in p u vo sdng dao ng trong khong nom ta chn u vo s cp bin p T1 cho ph hp. Vic la chnc chra theo bng sau :

CHN BIN PIN P CUNGCP

(RMS)DY S5 DY S6


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180 189190 199200 209210 219

220 229230 239240 249250 259

44556677

21212121

- in p danh nh u ra cun thcp c in p cao (8-9-10) phio c l (89-0-89)RMS.

- u ra ny c nn qua bnn hai bn kbao gm SCR Q1, Q2, itCR1 v cun cm L1 ly ra in p mt chiu B- (danh nh l 70V). Hai varistor RV1 v RV2 dng bo vbin p T1 khi c st bin vin p.

- in p danh nh u ra cun th cp c in p thp (11-12-13)phi o c l (17.5- 0- 17.5) RMS. c cp n vmch A1 v A3.

2.Vmch iu khin A1.

- in p u ra ca cun thcp in p thp (11-12-13) c cp nJ1-1 v J1-2 ca A1. a n bnn hai bn kCR1 & CR2.

- u ra ca bnn hai bn ka qua CR3- R5- it n p CR5- bnp 15V U1 v cp n vmch A3. it n p CR5 nhm bo vu

vo bn p 15V U1 khi bcc thng ging in p. im kim traTP2 xc nh sc mt ca in p +15VDC.

- Mt u ra ca b nn hai bn k a n u khng o ca bkhuch i thut ton U2A-3 qua R3 v CR4. Bchia in p R7 v R6thin p chun cho u vo U2A-2. Ti cc thi im bin in pripple vzero (thng thng l nhhn 0,3V). Th in p chun caU2A-2 cao hn U2A-3, lc u ra U2A-1 bng khng, CR7 cthin p thun v tC4 sphng qua CR7 vU2A-1. Ti im TP3 haychnh l u vo khng o ca U2D-12 sxut hin in p xung rng

ca. Thi gian v bin ca xung rng ca phthuc vo gi trR8v C4.

- Bkhuch i thut ton U2C v cc thnh phn kt hp to thnh mtvng kn n nh in p cho B-. B chia in p R11/R12/R13dng thin p chun cho u vo khng o ca bkhuch i thutton U2C-10. Cc in trR2/R4 v tin C1 dng tch sai scain p B-. u ra U2C-8 scung cp n u vo o ca bkhuch


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i thut ton U2D-13 mt gi trtng ng vi sthay i ca in pB-.

- in p thin p u ra ca U2C sc so snh vi in p rng caa n u vo khng o ca U2D-12. Kt qa l u ra ca U2D-14

sxut hin cc xung dng c rng thay i ph thuc vo mcthin p.

- Cc xung dng u ra U2D-14 c cp n BAZ ca cctransistor Q1 v Q2 sthng qua R16 v R17. Cc transistor Q1 v Q2sthng v cung cp in p kch thch cho SCR Q1 v Q2 . Thi gianmSCR squyt nh dng chy qua SCR v iu chnh c in pB-.

3.Bbin i in p B- thnh in p 24VDC A2:

- in p B- c cp n u J1-6 qua cu ch F1, cun chn L1 t vo

cc E ca Q1. Khi mc in p B- t n c-40VDC th Q1 scthin p thun v m, dng collector ca Q1 slm cho Q2 m. Lc in p Zne +13V trn it n p CR1 st n cc C ca Q2. Khic dng +13VDC t vo chn 8-Vcc ca U1, U1 hot ng, u raca bnh thi U1 s to ra chui xung c tn s, rng, chu kcng tc phthuc vo cc thnh phn kt hp: R7R10, CR2, C2. ura U1 t vo cc cng ca mosfet Q1.

- Mosfet Q1, cun cm L3, it CR1 v tin C2 hnh thnh mt bqut ngc suy gim, b ny c nhim v lm bin i cc tnh ca

in p ngun. Khi Q1 mcun L3 c tch trnng lng (t - L3-Q1- B-), C2 phng in ra ti (m dng C2- ti - t). Khi Q1 ngcun L3 phng nng lng qua CR1 v np cho tC2. iu ny bom sc mt dng khng i cung cp n ti.

- it n p CR2 bo vvic qu p khi khng c ti; in trR3 hnchdng chy qua mosfet Q1. u ra ca bbin i in p B- thnh+24VDC a qua R4 n DS1 lm n LED sng ln. in p+24VDC c a n A2 TB1-5 cp i sdng.

4. Mch kim tra ngun xoay chiu A3.

Chc nng ca mch kim tra ngun xoay chiu A3 l to ra tn hiuAC SENSE (J1-12 v J1-8) :

- Chuyn sang sdng ngun DC khi mt ngun AC

- Chuyn sang sdng ngun DC khi ngun AC thp

Mch kim tra ngun xoay chiu cha cc transistor Q1, Q2, Q4,transistor mosfet Q3 v cc thnh phn kt hp.


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- Di iu kin hot ng bnh thng (in p ngun AC danh nh)ngng nh thng ca it n p CR3 sbvt qu (it n p hotng), cc transistor Q1, Q4 v mosfet Q3 s c thin p thun(transistor sm), transistor Q2 sc thin p ngc (transistor Q2tt). S c in p +15VDC c cp n J1-8 v J1-12 (c s xuthin ca AC SENSE).

- Nu it n p CR3 khng hot ng (do in p cp ngun cho vmch A3 mt hoc thp hn ngng nh thng ca it CR3).transistor Q2 sthin p thun (m) , Q1, Q4, Q3 thin p ngc (tt).u ra AC SENSE s b cm (mt 15VDC). Lc s thc hin haichc nng trn.

- Ngun cp cho vmch A3, c lt tJ1-4 (+15VDC) a n P3-4.ng thi tthcp bin p T1(11-12-13) a n qua bnn hai bnkCR1, CR2 v blc R1C1, bsuy gim R1/R2 mi cp n it np CR3.

II.VMCH IU KHIN NGUN MT CHIU A11 (BATTERYCONTROL PANEL)

1. Gii thiu chung:Chc nng vmch iu khin ngun mt chiu A11bao gm hthng rle chuyn i v cc mch d, c chc nng tngchuyn tngun xoay chiu sang ngun mt chiu khi:

- in p xoay chiu hxung thp hn gii hn cho php .

- Khng c (mt) in p xoay chiu.

Khi ang s dng ngun mt chiu, v mch iu khin ngun mtchiu cn c chc nng tng ngt ngun (tt my) khi ngun cung cpthp hn gii hn cho php (ngng thp ca ngun mt chiu lowbattery threshold ).

2.Vmch iu khin A1 (BATTERY CONTROL PCB) :

- Vmch iu khin A1 gm cc transistor Q1/Q2; Cc it n p 47VCR3/CR4 v cc thnh phn kt hp.

- Di iu kin hot ng bnh thng (ngun AC c cung cp), cc

transistor Q1, Q2 c thin p ngc (tt) cc rle K2/ K3 khngc cp in. u vo ca ngun mt chiu trn u cp ni J1- 1/2/3sbcm (do cc tip im 4-6 (rle K2), 6-4 (rle K3) bh). Nguynnhn Q1/Q2 tt l do cc u vo AC SENSE (A) v AC SENSE(B)(c in p + 15VDC) cung cp n qua P1-7 v P1-5, qua cc itn p CR3/ CR4 v n bazca cc transistor Q1/ Q2. in p t voBazca Q1/Q2 ly trn bphn p R5 /R7 v R6/R8. Khi c in p


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AC SENSE, R7 v R8 c iu chnh mt ghp EB ca Q1 vQ2 khng phn cc thun. Nu c u vo AC SENSE (A hayB) bmt in p +15VDC , th mt u vo cn li (B hay A) vn slm Q1/Q2 tt, nghi l khng c schuyn i tngun AC sang DCm sc schuyn i tmy A sang my B v ngc li.

- Khi hthng mt ngun xoay chiu, khng c tn hiu AC SENSE Ahay B (+15 VDC khng cp n J1-16 v J1-15). in p m ri trnbphn p R5/R7 v R6/R8 tng ln, mt ghp EB ca Q1 v Q2 phncc thun. transistor Q1/ Q2 m, in p B- ca BATTERY sccp qua rle K2 v K3 cc tip im 4 ni 6 (ca K2), 6 ni 4 (ca K3)scung cp B- ca ngun mt chiu tJ1-1/2/3 n J1-7/8/9 (ca myB) v J1-4/5/6 (ca my A) . c in p m B- cp n bphn pR5/R7 v R6/R8.

- Khi mt ngun xoay chiu (B-VDC (A) P1-8 v B-VDC (B) P1-5),cc tin C1 v C2 sphng in qua hai bphn p to thi imkn mch ban u khi rle K2 v K3 cha c cp in

3.Kim tra in p ngun DC khi in p DC thp :

- Khi hot ng vi ngun mt chiu, vmch A1 cn c chc nng kimtra ngng ca ngun DC sdng.

- Nu in p ngun mt chiu cung cp thp hn ngng cho trc(mc ch l bo vngun mt chiu) th vmch A1 sto tn hiungt ngun sdng- tt my.

- Khi sdng ngun mt chiu, cc transistor Q1 v Q2 m, cc rle K2v K3 c cp ngun. Ngng in p thp c t mc 53VDC(i vi i ND 4000) mc 42VDC (i vi i ND 2000). Ngngny c thit lp cc in trR7 v R8 ca hai bphn p R5/R7 vR6/R8. in p 53VDC l in p phi o c u ant ca ccit n p CR3 v CR4.

- Khi in p ngun mt chiu thp hn ngng 53VDC, mt ghp BEca cc transistor Q1/Q2 skhng c phn cc thun, Q1 v Q2 tt,ngun mt chiu sbcm do cc tip im ca rle K2 v K3 nhra.

- Khi sdng ngun mt chiu c lp, sau khi bt cng tt S2 (POWERBATTERY) v v tr ON, cn phi n nm BATTERY RESET trongvng t3s n 5s , lm kn mch cp ngun rle K1, cc tip im 9chp 5, 12 chp 8, cc u J1-7/8/9, J1-4/5/6 c in p B-VDC, cpn P1-8 v P1-4 .Q1/Q2 m, K2 v K3 c cp in v skn mchcp ngun mt chiu cho hthng.

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