bai giang radio-cassette

7/21/2019 Bai Giang Radio-cassette

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BAI M AU

LCH S PHAT TRIEN NGANH

IEN T THONG TIN1- LCH S PHAT TRIEN CUA NGANH VO TUE!N

Vo tuyen ien va ien thoc la mot nganh hoc mi phattrien nhng a co nhng bcphat trien manh me va ngaycang hoan chnh! phong phu!ong gop rat nhie"u cho viec

phuc vu ne"n #inh te $uoc %an!phuc vu $uoc phong va nhie"ul&nh vc nghien cu #hoa hoc #hac'

V"# $%&'() co ngha la khong day.

Vo tuyen !e"n #VT$% la nganh khoa ho&c ngh!en c'u(!e"n )ha) th'&c h!e"n *'& l!en la&c+ t,uyena&t nh'ng t/n h!e"u+ t!n t'c+ thong t!n+tha01 do g!'a ha! hoa2c nh!eu !e31 1akhong co day da4n no! g!'a nh'ng

!e31 o+ ch5 d'&a 6ao ('c 7a& 6a lant,uyen cac *ong !e"n t'8.

*'+) $, ."/0 la nganh khoa ho&cngh!en c'u 6!e"c khong che+ !eu kh!e3nchuye3n d9ch cu8a luong !e"n t'8 6a d'&a6ao h!e"u :ua8 cu8a *'& khong che naye3 th'&c h!e"n cac 1u&c /ch 6o cung ada&ng cu8a loa! ng';!.

1 - L0. 2, 3.45$ 2*). 647 3.45$ $8*'9)


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>a01 ?@H a01 ?H?B 1ay thu o3! tan. ay ta&o *ong cao tan dung en!e"n t'8 ,a ;!>a01 ?HMJ co a! )hat thanh 6o tuyen !e"n

>a01 ?HMK )hat 1!nh ,a en K c'&c

>a01 ?HB? )hat 1!nh ,a en c'&c

Sau ch!en t,anh the g!;! lan ha!+ du&ng cu& (an da4n)hat t,!e3n 1a&nh a thay the en !e"n t'8 6;! 'u !e31 h!e"u

*uat cao+ kho! l';&ng nho8.>h'ng a! )hat thanh au t!en t,en the g!;! la a!

at7c;6a 6ao na01 ?HMM co cong *uat la ?MkN+ a! uoc TeCo"ng Sa8n na01 ?HBM co cong *uat la KJkN+ 6ao na01 ?HBPcong *uat en JJkN.

>gay nay cac a! )hat thanh :uoc te co cong*uat en hang ngan kN+ nh!eu nganh khoa ho&c khac nh',aa+ t'& o"ng hoa+ !eu kh!e3n 7a luye"n the) (aQng cao tan+t,ong y te+ 1ay t/nh . . .

: - T;). .;). 3.45$ $8*'9) o! chuye"n !e"n thoa&! co the3 nh=nthay ng';! 6;! 1=nh cung a ';&c th'&c h!e"n.

>goa! ,a 6o tuyen !e"n t'8 ';&c a) du&ng nh!eu 6ao

6!e"c ch!nh )hu&c 6u t,u&. Tuy nh!en ;8 cac n';c t' (a8n+ kythua"t 6o tuyen !e"n con h';ng 6ao cong ngh!e") ch!en

- M -


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t,anh nh' ne1 (o1 (aQng t!a ade+ !eu kh!e3n 1ay (ay dotha1 khong ng';! la!. . .

- T;). .;). 3.45$ $8*'9) o"! 6a Fa8!


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>eu ta 'a t/n h!e"u a1 tan 6ao 1a&ch !e"n e3 la1 thayo3! *ong 1ang #(!en o"+ tan *o% go&! la ky thua"t !eu chehay go&! la (!en !e"u. T,ong ,ad!o 6a t!6! ta co cac k!e3u !euche nh' *auX

$!eu che AX A1)l!tude odulat!onX $!eu che (!en o"

$!eu che LXL,e:uency odulat!onX $!eu che tan *o

$!eu che SSUX S!ngle S!de UandX $!eu che ;n (!en

$!eu che DSUX Dou(le S!de UandX $!eu che *ong (!enY$!eu che can (aQng

II- S O HO!I MOT MA PHAT AM C BAN

1- P.4#) T0. N.*'+ V%/ C450 ."(*-N?%") $) .*'+%X Thu nha"n cac t!n t'c au 6ao (!en

o3! ,a cac da&ng *ong !e"n+ e3 'a 6ao 1a&ch khuech a&!. >h'

t/n h!e"u a1 thanh (!en o3! ,a t/n h!e"u dong !e"n h=nh *!nZ-T*') en ngo ,a co t/n

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>guonT/nh!e"u

T!en$ $!eucheA

$CSCaotan

Daoo"ng#OSC%

A>T

F=nh .M T/n h!e"u a !euche L

V

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F=nh .? T/n h!e"u a !euche A


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h!e"u a ';&c !eu che la t/n h!e"u *ong 1ang co (!en o"thay o3!.

-CS 04" $4)D nhaQ1 khuech a&! t/n h!e"u *au kh! a!eu che co cong *uat u8 l;n+ 'a en anten ('c 7a& ,akhong g!an thanh *ong !e"n t'+ e3 t,uyen en 1ay thu.

:- M4/0. >*'% 0.'( AM4- M4/0. >*'+)

- -


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- P.4#) T0. N.*'+ 6%/ K*). h' 6a"y t/n h!e"u a1 tan 'a 6ao a la1 thay o3! (!eno" *ong 1ang+ nen ta go&! la !eu che (!en o" hay !euche A #A1)l!tude odulat!on%

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F=nh .? T/n h!e"u a !eu cheA


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4/)? 2"5)? $) .*'+% 84 )., 24%D- #*%X T/n h!e"u a1 tan #AL%.- #c%X T/n h!e"u *ong 1ang #RL%.- #1%X T/n h!e"u cao tan a !eu che A #RL%.

T,ong ky thua"t !eu che A+ neu *ong 1ang co tan *ola #C%+ t/n h!e"u a1 tan 'a 6ao !eu che co tan *o la #S%+

th= ngo ,a *au kh! !eu che *e co B t/n h!e"u c; (a8n la #C%Y #C\ S% Y #C- S% 6a cac *ong ha! cu8a chung. 6= ;8 tan *o caoneu 'a ha! t/n h!e"u co tan *o khac nhau 6ao 1o"t 1a&chkhuech a&! th= ngo ,a *e co *'& t,o"n *ong+ ta&o ,a cac t/nh!e"u to3ng 6a h!e"u cung cac *ong ha! (a"c M+ (a"c B Z en(a"c n+ co tan *o ga) M+ ga) B+ ga) n lan. Ta ch5 7et B t/nh!e"u c; (a8n nh' 6/ du& *auX

>eu *ong 1ang co tan *o la #C%[ P?JFW.

T/n h!e"u a1 tan 'a 6ao !eu che co tan *o la #S%[

FWSong ';&c !eu che *e co cac t/n h!e"u nh'X C[ P?JFW

Y #C\ S% [ P?FW #C- S% [ PJFW.


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>eu t/n h!e"u a1 tan 'a 6ao !eu che co tan *o la#S% [ J en FW 6ao !eu che 6;! *ong 1ang t,en th= t/n h!e"ungo ,a *e co )ho3 l!en tu&c nh' *auX

o&! U] la (and thong cu8a a! )hat hay con go&! la kho3*ong X

V= g!a8! tan *o dung cho (and A co g!;! ha&n t' BJ en?PJFW+ g!a8! thong khoa8ng ??JJFW. 1a t,ong 1o"t :uoc g!ala&! co ,at nh!eu a! )hat+ 1o4! t5nh thanh co 1o"t a! A+1o4! a! )hat co 1o"t tan *o ,!eng 6a ch!e1 1o"t khoa8ngtan *o can th!et #(and thong%. $e3 ha! a! )hat co tan *ogan nhau 1a khong (9 g!ao thoa *ong+ khong gay nh!e3u la4nnhau th= ha! *ong 1ang ch/nh )ha8! cach nhau to! th!e3u )ha8! la [ MU]. V= 6a"y (and thong cu8a a! )hat A (9 g!;! ha&nkhoa8ng HFW.

Va"y t/n h!e"u a1 tan 'a 6ao !eu che co tan *o (9g!;! ha&n ;8 tan *o cao+ ch5 cho )he) l;n nhat la K+FW. Doo 1a ;8 (and A a1 thanh thu ';&c nghe ke1 chat l';&ng

6e a1 *ac+ khong co t!eng t,e(le #tan *o cao%.III- MAWCH GIAI IEU CHE! AMD '"%K4$*") J$450. 2"5)? -'$'0$"8

^_ 1ay thu+ anten thu ';&c *ong !e"n t' cu8a a! )hat+:ua cac 1a&ch khuech a&! ,o! 'a 6ao tang tach *ong+ da&ng*ong 'a 6ao la *ong 1ang cao tan+ co (!en o" thay o3!theo *ong *!n. Do o 1a&ch tach *ong co nh!e"1 6u& loa&! (o8*ong 1ang cao tan ta! ta&o la&! a1 tan nh' ;8 a! )hat 'a6ao !eu che.

a&ch tach *ong th'&c chat la 1a&chnan !e"n 1o"t (an ky+ 6;! tu& lo&c co t,9*o nho8 e3 loa&! (o8 *ong 1ang cao tan+neu *ong 1ang 'a 6ao co (!en o" cangl;n th= !e"n a) DC ,a cang cao 6a ng';&cla&!. >gha la !e"n a) ,a la thanh )hanDC thay o3! theo *ong 1ang #do !euche%+ neu ta dung tu& l!en la&c tachthanh )han g;&n *ong ,a kho8! DC th= ta thu

';&c t/n h!e"u a1 tan nh' ;8 a! )hat 'a6ao !eu che. a&ch !e"n nh' *auX

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1 JHBX

BX Y J0 Z 2 -

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F=nh . T/n h!e"u t,ung tan*au d!ode


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1- M4/0.>*'+)4/)?1

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R13D1

AGC

ILB $E>

C14C13 VOLUME

F=nh .K a&ch tach *ong a1tan


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:- M4/0. >*'+) 4/)? : J.;). [

- P.4#) $0.

- $!ode 1 la1 nh!e"1 6u& ch5nh l'u n'8a chu k= cu8a *ong1ang+

- R1ong 6a! t,o nh' ta8! cu8a 1a&ch ch!8nh l'u.

- C1 tu& lo&c cao tan+ kh! d!ode da4n th= tu C1na&) 6a tu& 7a8 :uaR kh! d!ode tat. Tu& c c' l!en t!e) na&) 7a8 :ua R nen no! l!en

cac *ong C la&! thanh 1o"t ';ng cong l!en tu&c g!ong nh' h=nh(ao cu8a *ong 1ang. >eu t/nh toan R 6a C cho )hu h;&) th=*ong ,a g!ong y nh' ';ng (ao #day 6!en% cu8a *ong 1ang ola da&ng *ong *!n t,';c kh! 'a 6ao !eu che. >h'ng t/n h!e"u ,aco ha! thanh )hanX o"t 1'c DC t,ung (=nh 6a 1o"t *ong *!n(!en th!en t,en 1'c DC+ e3 lay *ong *!n ,a kho8! DC ta 1ac1o"t tu& l!en la&c.

- D!ode D? ';&c dung la lo&a! tach *ong co !e"n the 1;8V

nho8 [ J.?6 #e%+ 6a ho&at o"ng ';&c ;8 tan *o cao.

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F=nh .P


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RADIO- CASSETTE

- >eu thay D!ode D? (aQng d!ode th';ng S! th= t/n h!e"u ,anho8 khong u8 1'c da4n cu8a d!ode nen d!ode luon luon tatdo o khong co t/n h!e"u ,a.

- >eu R+ C :ua nho8 #tu& nho8 :ua% th= t/n h!e"u ,a khong';&c l!en la&c. Cac (an k= d';ng cu8a Cc' ,;! ,a&c nhau+ *ong,a khong tot t/n h!e"u ,a khong tot.

- >eu R+ C :ua l;n th= th;! g!an 7a8 ,at lau+ la1 (!enda&ng t/n h!e"u ,a+ t/n h!e"u ,a (!en th!en khong k9) 6;! *ong1ang+ la1 t/n h!e"u (9 1eo+ co da&ng nh' *au X

IV SONG IEN T

1- .45* )*'+Da nh'ng dao o"ng !e"n 6a t' co tan *o ,at cao # `

?JJ hW% lan t,uyen ';&c t,ong khong g!an 6;! 6a"n toc (aQng6a"n toc anh *ang . # V [ BJJ.JJJ 1*%.:- 4\0 $8,)?D

Song !e"n t' la da&ng 6a"t chat nen no 1ang na0ngl';&ng+ t,en ';ng t,uyen na0ng l';&ng *e (9 g!a81 dan+ cac6a"t the3 k!1 loa&! *e ha) thu 1a&nh *ong !e"n t' .

- B,@50 2"5)?X JX a :uang ';ng *ong ! ';&c t,ong 1o"tchu ky. ;n 69 t/nh (aQng 1et #1%.6/ du& X *ong !e"n t' cu8a 1o"t a! )hat cotan *o la [ ?JJJFW th= (';c *ong la [BJJ1.

]- T4) 2"(Da a2c t,'ng :uan t,o&ng cu8a *ong !e"n t' no :uy 9nh t/nhchat 6a *'& lan t,uyen cu8a *ong nay. >eu tan *o cang

cao no 1ang ';&c cang nh!eu t!n t'c.VI PHAN LOAWI SONG IEN T

D'&a 6ao (';c *ong 1a ng';! ta )han loa&! *ong !e"n t'nh' *auX

1- S"5)? 47*X LX#ong Na6e%Co tan *o t' BJJhW b JJhW+ co (';c *ong la [

?JJJ1 en PJJ1

( )u iemX an t,uyen ! 6ong :uanh ch';ng nga&! 6a"t+co kha8 na0ng ! 6ong theo (e cong t,a! at theo oa&n ngan

nen co ta1 hoa&t o"ng t,ung (=nh+ n';c /t ha) thu& *ong

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da! nen ';&c dung t,ong ha8! :uan+ hang ha8! hoa2c thongt!n l!en lu&c 9a.

( *hc iemX )ho3 tan #kenh% l;n khoa8ng H hW nena1 thanh )ha8! ';&c nen la&! 1;! t,uyen ! nh!eu t/n h!e"u';&c+ 6= da! tan *o )hat ,at he&).

:- S"5)? $8%)?X MX#ed!u1 Na6e %Co tan *o t' JJ hW b ?PJJ hW. co (';c *ong la

[ PJJ1en MJJ1

( )u iemX co kha8 na0ng )hat ';&c nh!eu a! h;n 6= coda! tan ,o"ng h;n ] .

( +huyet iemX ta1 hoa&t o"ng ngan h;n *ong da!+nen ';&c dung la1 a! )hat thanh 9a )h';ng+ #a! )hatcac t5nh %.

S"5)? )?4^)X SX #*ho,t -Na6e%

Da! tan t' #BhW b BJhW%+ co (';c *ong la [ ?JJ1en ?J1.

)u iemX T,uyen ! ,at 7a+ neu cong *uat )hat ?J] th=! ';&c n'8a 6ong t,a! at. V= no )ha8n 7a& g!'a 1a2t at6a tan !e"n ly #tang !e"n ly cach 1a2t at ?MJ 1%. Ua0ng*ong nay ';&c :uoc te :ua8n ly+ ch5 dung cho cac a!)hat thanh ca) :uoc g!a+ )hat thanh en cac n';c t,enthe g!;!.

Ua0ng SXch!a la1 nh!eu (a0ng nh' SX1en SX. Foa2cSX1en SX

SX1 X BhW b ?JhW.

SX:X ?JhW b MJhW.

SXX MJhW b BJhW.

]- S"5)? 2*'#% 04" $4) D VH_#Ve,y F!ght L,e:uency%.

Day tan BJ b BJJhW. Dung e3 )hat thanh a! _M 6at,uyen h=nh .

( )u iem ,co kha8 na0ng 1ang nh!eu t!n t'c .( *hc iemX ta1 hoa&t o"ng ngan la&! (9 *uy g!a1 ,at

1a&nh+ khong ';&c tan !e"n ly )ha8n 7a& 6a ! 7uyen :uatang !e"n ly nen ';&c dung e3 l!en la&c 6u t,u& 6a !eukh!e3n t' 7a.

Day VH_ch!a la1 cac (a0ng nh' X #t!eu chua3n _CCcu8ay%.

VLX kenh ? en kenh X [ K hW b @K hW.

VHX kenh P en kenh ?MX [ ?K hW b M?P hW.

- ?M -


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_MX @@ b ?J@ hW #t!eu chua3n :uoc te+ ,!eng cu8a >ha"tla J b HJ hW %.

- S"5)? 2*'#% 0,/0 $4)D UH_

Day tan BJJhW -BhWDung t,ong t,uyen h=nh (a0ng UH_co en kenh t,ong (and *ong nay co the3 dung *ong

V!(a+ *ong ,ada *ong V!(a g!'a )hat 6a thu )ha8! nh=n thaynhau.

- S"5)? 6'+ $*).DDa! tan *o t' BFW en ?KFW

Ua0ng CX ';&c dung ;8 chau A co tan *oB hW b K.M hW.Ua0ng SX ';&c dung ;8 chau y - y at!nh co tan *o

hW b H hW.Ua0ng UX ';&c dung ;8 chau AGu 6a cac n';c thuo"c S>

co tan *o?JhWb?K hW.BAI :

MA THU AM

I- S O HO!I MA THU AM

11 P.4) $, $.% 2"5)? D

Thu nha"n t/n h!e"u t' a! )hat g;8! en+ loa&! (o8nh!e4u+ o la An-ten )ho! h;&) 6;! 1a&ch co"ng h';8ng - C

- ?B -

?[ @J b ?JJ

6ong

M[ @ b ?J 6ong

CVA[ MMJ) b KJ)


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1a&ch co"ng h';ng co tan *o co"ng h';ng thay o3! ';&c t'1!n en 1a7 t,ong (and tan cu8a 1ay thu.

V/ du&X (and ] th= co"ng h';ng t' tan *o BJFW en?PJFW

-Uand ] co tan *o t' BJJ en JJFW.

-Uand S] co tan *o t' M.MFW en BJFW. $e3 a&t chatl';&ng cao th= (and S] )ha8! ch!a la1 nh!eu (and nh' S] [ S]?+S]MZ..S]P.

- ?t' @J en ?JJ 6ong :uan t,en lo! than #Anten thu%

- CVAX Tu& 7oay !eu ch5nh ';&c t' MMJ) en KJ).

- h! !eu ch5nh CVA1a7 en 1!n th= tan *o co"ngh';8ng *e thay o3! t' 1!n en 1a7. t,ong (and ] th=X

-

^_ tan *o BJ FW th= [ MaxCVL12

1

- ^_ tan *o ?PJ FW th= [1!n

CVS1

2

1

V/ du&X uon thu ';&c a! t!eng no! nhan dan ThaQ1 khuech a&! t/n h!e"u thu ';&c t' anten cho ,a(!en o" l;n len+ e3 chong ';&c nh!e4u.

- Tan RL b A1) khong khuech a&! 1a&nh 6= t/n h!e"u 6aola tan *o cao 6a day thong ,at ,o"ng. a&ch khuech a&! *ekhong a) 'ng ';&c o" khuech a&! nh' nhau ;8 1o&! tan *o+do o )ha8! co 1a&ch o3! tan #6/ du& X (and A X BJ FW en?PJFW%

1 ."(* >"9* $4) 647 4" >"+)?

-Uo" dao o"ng ta&o ,a t/n h!e"u h=nh *!n co tan *o ##o%% e3'a 6ao (o" o3! tan ket h;&) 6;! t/n h!e"u t' anten ##a%% 'a6ao e3 cho tan *o t,ung g!an go&! la t,ung tan #IL%

I_Y "` 4Y ]H

->h' 6a"y J)ha8! thay o3! *ao cho IL la haQng *o

-Do o e3 thu ';&c ? t/n h!e"u #a% (at ky th= )ha8! ch5nh(o" co"ng h';8ng thu *ong 6a (o" dao o"ng *ao cho t';ng 'ng

oThay o3! M tu& ong t,u&c CVA 6a CVO

oThay o3! !e"n a) )han c'&c cho M d!ode (!en dung # D!odeVa,! Ca) %

- ?K -


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- #IL%ch5 la haQng *o kh! J(!en th!en t,ong 1o"t )ha&1 6!nao o+ e3 a&t chat l';&ng cao th= )ha8! ch!a day tan J ,anh!eu (and X S] [ S]?+S]MZ.S]P. #nh' t,en%

-Va"y kho! o3! tan *o chuye3n t/n h!e"u tan *o cao thanhtan *o tha) 6a la haQng *o. #T!eu chua3n A la K FW% e3'a en khuech a&! t,ung tan.

]1 .%'(0. >4/* $8%)? $4) 647 K"/0 JI_ AMP- Cho&n lo&c 1o"t tan *o t,ung tan. huech a&! t/n h!e"u

l;n len nh!eu lanX la kho! khuech a&! chu8 yeu cho toan1ay. V= t/n h!e"u t,ung tan luon luon la haQng *o+ de4 dangkhuech a&! co o" l;&! l;n. >eu t/n h!e"u t,ung tan (9 le"ch th=1at t/n h!e"u ngo ,a hoan toan.

- Tang IL A< co B (!en the t,ung tan co"ng h';8ng ;8tan *o IL[ KFW. #TB+ TK+ Tco lo! !eu ch5nh ';&c tan *oco"ng h';8ng%.

- IL?X lo&c t/n h!e"u IL duy nhat 'a 6ao khuech a&!+ loa&! (o8cac tan *o a+ o6a a\o

1 ."(* $450. 2"5)? J'$'0$"8D-am nhiem vu ngc lai vi ta"ng ie"u che

may phat' *gh&a la bien oi t.n hieu a ie"u chethanh t.n hieu am ta"n! hay goi la loai bo /ong mangtai tao lai am ta"n'

*go ra cua mach tach /ong co ca ien ap motchie"u %o %io%e chnh lu! %ien ap nay ty le thuan

vi bien o t.n hieu vao' 0o o lay ien ap nayphan cc ngc lai 1ran/i/tor #huyech ai trung ta"n 2!lam nhiem vu 345 63uto 4ain 5ontrol 7 t ong ie"uchnh o li8

1 ."(* AGCD J.4& AVC

JAGCD A%$" G4*) C")$8"KD t'& o"ng !eu ch5nh o" l;&!+ hayAVCX Auto Volu1e cont,olX t'& o"ng !eu ch5nh a1 l';&ng%

T/n h!e"u thu ';&c t' anten luon co (!en o" thay o3!+ doo t/n h!e"u au ,a ;8 loa co khuynh h';ng thay o3! theoX luc

l;n+ luc nho8 go&! la h!e"n t';&ng Lad!ng #a1 thanh cha") ch;n%.9ach 345 c thiet #e nha:m giam bt hien

tng ;a%ing' 9ach hoat ong nh /au,

!a8 *'8 t/n h!e"u 6ao anten co (!en o" l;n !eu nayla1 cho !e"n the a1 *au tach *ong ta0ng len #a1 nh!euh;n% 6a tac o"ng en )han c'&c cho Mla1 cho Mda4n yeuh;n+ he" *o khuyech a&! M*e g!a81 do t/n h!e"u ,a khong ta0ng';&c. Va ng';&c la&! neu t/n h!e"u 6ao anten co (!en o" g!a81th= !e"n a) AC *e g!a81 a1 la1 Mda4n 1a&nh #ta0ng )han

c'&c% nen he" *o $ Mta0ng do o t/n h!e"u ,a khong g!a81.>o! cach khac kh! t/n h!e"u au 6ao thay o3! nh; 1a&ch AC

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16/125

RADIO- CASSETTE

t/n h!e"u au ,a /t (!en o3!. e1 nh' h!e"n t';&ng Lad!ng (9 loa&!t,'.

-C.%5 &5D V;! ly g!a8! t,en th= D?)ha8! la tach *ong a16;! t,an*!*to, la loa&! n)n. >eu dung t,an*!*to, la )n) th= )ha8!la tach *ong d';ng.

[1 T*') 4/* 0"#)?2%4($D

- T!en khuech a&!X la 1a&ch $ !e"n a) l;n len 'aen 1a&ch khuech a&! cong *uat

- huech a&! cong *uatX cho cong *uat l;n )hu h;&)6;! loa+ 'a ,a loa )hat ,a a1 thanh cho ng';! nghe.

II- RAIO AM 1 BAN SONG MXD

:1 ."(* 04" $4)D

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17/125

RADIO- CASSETTE

';&c :uan t,en lo8! than t,ong 1ay+ 6a tu& *ong *ong co"ngh';8ng la CVAco the3 thay o3! ';&c !e"n dung. >h' 6a"y ayla khung dao o"ng co the3 thay o3! ';&c tan *o co"ngh';8ng t/nh theo cong th'cX

co"ng h';8ng [LC2

1

>h' 6a"y cuo"n day anten :uan t,en lo8! than t,ong 1ay*e )ho! h;&) 6;! CVA *ao cho kh! 7oay CVAt' g!a t,9 nho8 nhaten l;n nhat th= 1a&ch co"ng h';8ng co the3 co"ng h';8ng';&c 6;! cac a! )hat co tan *o t,ong khoa8n BJFW en?PJFW.

- ho! khuech a&! cao tanX huech a&! nang cao (!en o" t/nh!e"u thu ';&c t' anten #A%.

ho! dao o"ngX U!en o3! na0ng l';&ng nguon DC thanh t/n h!e"u

AC #O% t,o"n 6;! t/n h!e"u thu t' anten. T,ong :ua t,=nh t,o"n t/nh!e"u #A% 6a #O% *e 7ay ,a cac :ua t,=nh co"ng t,' tan *o t/nh!e"u la4n nhau+ nh'ng ta ch5 cho&n 1o"t tan *o la IL [ O- A[KFW. $e3 g!'8 6'ng t/n h!e"u t,ung tan t,ong :ua t,=nh cho&na! co Athay o3! th= O*e thay o3! theo+ do o ng';! ta *'8du&ng CVAong ch5nh 6;! CVO.

:1: M4/0. >*'+)D

Cuo"n day co"ng h';8ng cho&n a! con go&! la day anten

';&c :uan t,en lo8! than (en t,ong 1ay co M cuo"n day*; ca) 6a th' ca).

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F=nh @.B 1a&ch !e"n kho! caotan

Q1

R2

R1

C3CVa

CVo

CTa

CTo

DAO $O> $O_

VCC

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IL? VA>


18/125

RADIO- CASSETTE

+ Cuo"n *; ca) th';ng co khoa8n ?JJ6ong+ neu dung ong ho o oh1co !e"n t,;8 khoa8n K-@ oh1. h! dayanten 't ta co the3 thao ,a :uanla&!.

+ Cuo"n th' ca) co khoa8n ?J-MJ6ong+ no"! t,;8 ,at nho8 gan (aQngJ #e1 h=nh @.K%

- CVA 6a CVO ';&c th!et ke chung t,ongho") CVong ch5nh chung ? t,u&c #e1h=nh @.%

- CtA+CtOcu8a (a0ng ] ';&c a2t t,ongho") CV co tac du&ng t!nh ch5nh kh!*a8n 7uat (a8o a1 *ao cho tat ca8

cac ,ad!o kh! 7uat 7';8ng )ha8! cocac thong *o ky thua"t g!ong nhaut'c la )ha8! thu ';&c cac a! )hat A t,ong (a0ng *ong ]co tan *o t' BJFW b?PJJFW #e1 h=nh @.P%

- R?+ RM ta&o !e"n the )han c'&c t!e) g!a) fEt,an*!*to, ?.

- ? la1 ch'c na0ng dao o"ng+t,o"n *ong 6a khuech a&! cao tan.

- Cuo"n day dao o"ng cu8a (a0ng] co lo8! *;n 1au o8. $';&c 1ac

*ong *ong 6;! CVO 6a CTO ta&o thanh1a&ch dao o"ng ';&c cung ca)na0ng l';&ng thong :ua (!en thet,ung tan ?. T,ong :ua t,=nh *'8ach'a khong ';&c tuy t!e"n !euch5nh cac CVO+ CVA 6a lo8! cuo"nday dao o"ng #h=nh @.%.

- CM ho! t!e) thua"n gay dao o"ng.

- U!en the t,ung tan 6ang ';&c

th!et ke co"ng h';8ng ;8 tan *oKFW 6a (a0ng thong #U]% la?JFW+ la1 nh!e"1 6u& l!en la&c 6alo&c t/n h!e"u+ 'a en kho! khuecha&! t,ung tan M+ loa&! (o8 cac t/nh!e"u co tan *o khac gay nh!e3ucho 1ay.

:1 N?%&'#) K&5 ."4/$>"+)?D

- ay thu ang ';&c a2t 6ung co*ong cu8a ? a! )hat thanh nao

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S;

ca)

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CV

F=nh @. Fo") dao

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A CtAA C

VOA CtoA

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19/125

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o+ kh! ng';! *'8 du&ng do t=1 a! ch/nh la 7oay CV+ luc naytan *o co"ng h';8ng cu8a (a3y *ong thay o3!+ kh! tan *o daoo"ng ,!eng cu8a (a3y *ong t,ung 6;! tan *o *ong 1angcu8a 1o"t a! )hat nao o th= h!e"n t';&ng co"ng h';8ng 7ay,a t,en (a3y *ong. uc nay to3ng t,;8 cu8a (a3y *ong ,atl;n o! 6;! t/n h!e"u cu8a cu8a a! )hat ';&c co"ng h';8ng

nen (!en o" t/n h!e"u cu8a a! )hat o l;n+ t';ng 'ng ;8au cuo"n day th' ca) ta cung *e co (!en o" t/n h!e"ul;n+ ngha la t/n h!e"u cu8a a! )hat o a ';&c cho&n. $o!6;! cac a! )hat co tan *o *ong 1ang khong co"ngh';8ng th= to3ng t,;8 (a3y *ong nho8+ nen t/n h!e"u cu8a caca! )hat nay khong ';&c ca81 'ng :ua cuo"n th' ca)anten+ do ty8 le" cu8a (!en a) anten la ?JX?. T/n h!e"u cu8a a!)hat ';&c cho&n A';&c 'a 6ao chan U? khuech a&! nangcao (!en o".

-

a&ch dao o"ng 'a t/n h!e"u O6ao chan E? nh' 6a"y ha!t/n h!e"u O6a A ';&c t,o"n ta&! chan C t,an*!*to,. >h' 6a"y ta&!chan C? ta co t/n h!e"u t,ung tan co tan *o KFW.

:: ."(* $8%)? $4)D

::1 .45* )*'+

- ho! t,ung tan th'&c chat la he" khuech a&! nang cao(!en o" t/n h!e"u *ao cho kh! tach *ong ta thu ';&c t/n h!e"ua1 tan co (!en o" t,ung (=nh khoa8n ? V


20/125

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- T/n h!e"u t,ung tan ';&c cho&n thong :ua (!en the t,ung tan? co 1au 6ang.

- Th';ng tang t,ung tan co t' M en B tang khuech a&!l!en la&c (aQng cac (!en a) co"ng h';8ng nhaQ1 loa&! (o8cac t/n h!e"u nh!e4u khong )ha8! la KFW.

Cac (!en the a) t,ung tan eu co"ng h';8ng ;8 tan *oKFW tuy nh!en he" *o )ha31 chat cu8a B cuo"n day khongg!ong nhau th';ng ';&c ky h!e"u co 1au 6ang+ t,ang+ en.>h' 6a"y neu cuo"n day nao co he" *o )ha31 chat cao (a0ngthong *e ,o"ng+ t,anh chuye3n o3! 69 t,/ cac cuo"n day t,ungtan *e la1 nh!e41 nh!e3u 6ao kho! khuech a&! t,ung tan+la1 g!a1 chat l';&ng a1 thanh.

::: M4/0. >*'+)D

e1 1a&ch !e"n nh' h=nh 6e @.@X

T/n h!e"u t,ung tan t' 1a&ch o3! tan 'a 6ao (!en thet,ung tan ? #6ang% co"ng h';8ng ;8 tan *o KFW l!en la&c t/nh!e"u 'a 6ao chan UM khuech a&! lan th' nhat.

RK ca) !e"n the )han chan UM.

RH lay !e"n the AC t' 1a&ch tach tach *ong e3 !euch5nh o" l;&! cu8a ? theo nguyen ly nh' *auX

- h! t/n h!e"u 6ao co (!en o" l;n t/n h!e"u ,a co (!en o"l;n da4n en 1'c !e"n a) DC cu8a 1a&ch AC ta0ng theoch!eu a1 la1 g!a1 !e"n a) )han c'&c ? da4n yeu g!a1(!en o" t/n h!e"u lay ,a.

- h! t/n h!e"u 6ao co (!en o" nho8 th= :ua t,=nh d!e4n ,a

ng';&c la&!.

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ILB $E>

ILM TRA>

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Q2

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R5

R4

C8

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C4

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R7

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C9


21/125

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- R o3n 9nh nh!e"t M.

- CP tu& (y)a** tan *o cao ta0ng o" l;&! cho 1a&ch khuech a&!t,ung tan.

- C 6a C@ la ha! tu& t,ung hoaX Ta thay t/n h!e"u ta&! cuo"nday 'a 6ao tu& C 6a C@ co )ha ng';&c 6;! t/n h!e"u ta&!

chan U t,an*!*to, nh' 6a"y kh! co t=n h!e"u nh!e"u 6ao co (!eno" l;n thong :ua ';ng ho! t!e) nay *e t,!e"t t!eu cac t/nh!e"u nh!e4u.

: T4)? $450. 2"5)?D

a1 nh!e"1 6u& ta! ta&o t/n h!e"u a1 tan t' t/n h!e"u t,ungtan co tan *o KFW 1ang t/n h!e"u a1 tan.

e1 1a&ch !e"n nh' h=nh 6e @.HX

- Ta thay 1a&ch tach *ong loa&! (o8 (an ky d';ng cu8a t/nh!e"u+ ch5 g!'8 la&! (an ky a1 cu8a t/n h!e"u t,ong kh! o ;8)han d';ng cu8a t/n h!e"u t,ung tan 6a4n ch'a thanh )hana1 tan t';ng t'& ;8 (an ky a1. ^_ ay ta thay t,an*!*to,

t,ung tan loa&! > kh! ta lay t/n h!e"u *au tach *ong co (anky a1 :ua ? !e"n t,;8 RAC6a tu& lo&c CAC ta&o thanh !e"n a)

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R13D1

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ILB $E>

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F=nh @.?M t/n h!e"u t,ung tan*au d!ode


22/125

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DC a1 le" thuo"c 6ao (!en o" t/n h!e"u ,a ch/nh !e"n a)nay *e ta&o h!e"u 'ng t'& o"ng !eu ch5nh o" l;&!+ neu tach5nh l'u (an ky d';ng th= *e ta&o ho! t!e) d';ng. >h' 6a"yk!e3u tach *ong d';ng *'8 du&ng cho 1a&ch t,ung tan *'8 du&ngt,an*!*to, k!e3u guyen ly hoa&to"ng nh' *auX

- h! t/n h!e"u 6ao co (!en o" l;n+ *au tach *ong 1'c

!e"n a) DC t,ung (=nh ;8 au ,a ta0ng cao. Ch/nh !e"n a) a1nay la1 g!a1 )han c'&c UEM+ la1 M da4n yeu+ g!a1

- MM -


23/125

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(!en o" t/n h!e"u ,a 6a khong e3 M (a8o hoa t,ong t,';ngh;&) t/n h!e"u *ong 1ang co (!en o" :ua l;n ! 6ao 1aykh! 1ay thu ;8 :ua gan a! )hat.ua t,=nh *e d!e4n ,ang';&c la&! kh! 1ay thu ;8 7a a! )hat t/n h!e"u thu 6ao co(!en o" nho8.

- MB -


24/125

RADIO- CASSETTE

- MK -

R1

C1

ILB $E> R13

R6

R2

C8

R5

CVa

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C9

R3

IL? VA>

DAO $O> $O_

C3

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CV o CTo

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C7

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R4

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25/125

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: R4*" AM ).*'% B4)D

:1 N?%&'#) $4^0D

T';ng t'& nh' ,ad!o A ? (and+ nh'ng e3 (at ';&c nh!eu a!;8 nh'ng khoa8ng tan *o khac nhau+ ta *'8 du&ng nhie"u cuon%ay anten 'ng 6;! 1o4! (and *ong.

R3

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26/125

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- ?la cuo"n day lay t/n h!e"u t' anten ,od ta0ng c';ng t/nh!e"u cho cho lo8! than.

- Mla cuo"n day anten cu8a (and S]?+ co Cta?*ong *ong la1ch'c na0ng t!nh ch5nh khac )hu&c *a! *o *ao cho kh! ch5nh CVAt' 1!n en 1a7 th= (ay *ong cu8a (and S] )ha8! (at ';&ccac a! )hat co *ong 1ang t' ?+FW en FW.

- B la cuo"n *; ca) anten cu8a (and *ong ]+ K la cuo"nth' ca) lay t/n h!e"u (aQng ca81 'ng.

- Fa! cuo"n day (a3y *ong cu8a ha! (and *ong *'8 du&ng chungCVa thong :ua cong tac o3! (and. h! chuye3n cong tac 6e(and *ong nao th= CVA*e ';&c n;! 6ao cuo"n day cu8a (and*ong o.

-T/n h!e"u Acu8a (and S] ';&c lay (aQng t'& nga3u 6a 'a 6aochan E ?

-T/n h!e"u Acu8a (and ] ';&c lay (aQng ca81 'ng thong:ua ca81 'ng ;8 cuo"n th' ca) 6a 'a 6ao chan U?.

- P la cuo"n day dao o"ng cu8a (a0ng *ong ].

- la cuo"n day cung ca) na0ng l';&ng cho khung dao o"ng.

- la cuo"n day lay t/n h!e"u Ot,o"n 6;! t/n h!e"u A ta&!cuo"n th' ca) anten.

- @ la cuo"n day dao o"ng cu8a (a0ng *ong S].

- H la cuo"n day cung ca) na0ng l';&ng cho khung dao o"ng.

- ?J la cuo"n day lay t/n h!e"u Ot,o"n 6;! t/n h!e"u A ta&!chan U?.

- Ta&! chan C? ta thu ';&c t/n h!e"u t,ung tan+ )han t,ung tancu8a ,ad!o nh!eu (and hoan toan g!ong nh' ,ad!o ? (and.

:[ R4*" AM %7)? IC

:[1 M4/0. >*'+) )?%&'#) K&5D

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27/125


28/125

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4 P.4) 49& 2"5)? 0."/) >47*D

- ? la cuo"n day ta0ng c';ng t/n h!e"u thu t' anten ,o!d 'a6ao lo8! than (en t,ong 1ay.

- M cuo"n day *; ca) anten ] co CT? *ong *ong la1nh!e"1 6u& t!ng ch5nh *ao cho kh! ch5nh CVAt' 1!n en 1a71a&ch (a3y *ong co the3 thu ';&c cac a! )hat t,ong (and

*ong ] #BJFW-?PJJFW%.-T';ng t'& nh' (and ] cac cuo"n day B+ K la cac cuo"nanten cac (and *ong S]? 6a S]M.

-Tat ca8 cac cuo"n day cu8a cac (and *ong eu ';&c no!en cong tac o3! (and e3 ';&c no! en CVAta&o thanh1a&ch (a3y *ong cho&n a!.

- Cac cuo"n day + P+ la cac th' ca) cu8a cac cuo"nday (a3y *ong cho&n a! lay t/n h!e"u (aQng ca81 'ng :uacong tac cho&n (and 'a 6ao chan ? IC #RL !n%.

- Chan M IC cung ca) thanh !e"n a) DC cho kho! khuecha&! cao tan A thong :ua cac cuo"n day th' ca) anten+ kh!

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chuye3n 6e (and L chan ? IC khong ';&c ca) !e"n nen)han ,ad!o A t,ong IC khong hoa&t o"ng t,anh gay nh!e3ulen )han ,ad!o L ';&c a2t chung t,ong IC.

P.4) 4" >"+)?

- @+ H+ ?J la cuo"n day dao o"ng cu8a cac (and *ong t,ong

o chan K IC cung ca) na0ng l';&ng cho khung dao o"ng+ chanB IC l!en la&c t/n h!e"u Ocung ca) cho tang t,o"n *ong t,ong IC.

0 P.4) $8%)? $4)

- Chan ?K IC la ngo8 ,a cu8a tang t,o"n *ong taco ';&c t/n h!e"u t,ung tan co tan *o KFW+ t/n h!e"u nay';&c 'a cuo"n day co"ng h';8ng t,ung tan # 1au 6ang%6atha&ch anh KFW loa&! (o8 cac t/n h!e"u nh!e3u khac *au o'a t/n h!e"u t,ung tan en chan ?B IC.

- a&ch tach *ong ';&c th'&c h!e"n t,ong IC 6a t/n

h!e"u a1 tan ';&c lay ,a ta&! chan H cu8a IC.S; o (en t,ong IC TA@??J

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:uoc te+ ,!eng >ha"t J-HJ hW%._MX L,e:uency odulat!onX !eu che tan *oX t/n h!e"u a1

tan 'a 6ao !eu che la1 thay o3! tan *o *ong 1ang1: % -

VCOSTOen 1ay )hat )ha8! cocong *uat l;n.

\ Tan *o *ong 1ang cao th!et (9 7'8 ly at t!en.\ a&ch g!a8! !eu che 6a !eu che )h'c ta&) h;n.

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31/125

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huech a&! cong *uat cao tanX e3 co cong *uat l;n 'aen a0ng ten )hat *ong.

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CVd!ode (!en dungX kh! )han c'&c ngh9ch 6;! !e"n a) )hanc'&c thay o3! th= !e"n dung *e thay o3!. a thanh )han !e"nkhang thay o3! kh! cho t/n h!e"u a1 tan 6ao !eu che.

L1CDca8n cao tan+ nga0n ca8n t/n h!e"u *ong 1ang khong choa8nh h';8ng ng';&c 6e T?

C1CX tu& thoat #no! 1a**%.

R1 R: RX )han c'&c che o" Acho 1. e3 ta&o !eu k!e"n cho

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T1(!en the ghe) l!en la&c t/n h!e"u a1 tan.

a C: C X tu& ho! t!e) d';ng duy t,= dao o"ng.

T: ta8! cho 1 ong th;! ta&o k/ch th/ch cho 1 dao o"ng.

L: C: C CV CBbCe3 7ac 9nh tan *o dao o"ng .

Tan *o dao o"ng ';&c 7ac 9nh (aQng cong th'c.

C6!e"n dung cu8a d!ode 6a,!ca).Cb0X !e"n dung k/ *!nh cu8a 1o! no! BC

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2'2'2 0ang /ong,

2'2'B *guyen ly hoat ong,>eu khong 'a t/n h!e"u a1 tan 6ao th= d!ode 6a,!ca) ';&c)han c'&c (aQng 1o"t !e"n a) nhat 9nh+ *e co 1o"t !e"ndung khong thay o3!+ la1 cho 1 dao o"ng ;8 1o"t tan *onhat 9nh+ o la tan *o *ong 1ang #tan *o a! )hat%.

>eu t/n h!e"u a1 tan 'a 6ao co (an k= d';ng la1 !e"nthe )han c'&c d!ode ta0ng do o !e"n dung g!a81 la1 1 daoo"ng co tan *o ta0ng len. >g';&c la&! neu t/n h!e"u 'a 6aoco (an k= a1 la1 !e"n the )han c'&c d!ode g!a81 nen !e"n

dung d!ode ta0ng la1 tan *o dao o"ng cu8a ? *e g!a81.ta no!t/n h!e"u a1 tan 'a 6ao la1 thay o3! t/n h!e"u *ong 1angnen go&! la !eu che tan *o #!eu che L%.2'B 9ach ie"u che ;9 %ung tran/it/torX #thn !"nt#$n M%$ 'h$(n !a()% 2'B'@


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- 1 t,an*!*to, !e"n khang ';&c dung e3 dao o"ng ta&o*ong 1ang+ co 1o! no! UC (9 )han c'&c ngh9ch nh' d!ode (!endung.

- R?)han c'&c cho 1!c,o !e"n dung- RMRBRK)han c'&c cho ?khuech a&! che o" A- ? CMca8n cao tan- MCB CK Cho! t!e) d';ng duy t,= dao o"ng- Bta8! cho ?6a ta&o k/ch th/ch dao o"ng

2'B'2 *guyen ly hoat ong,

? 1a&ch dao o"ng ta&o *ong 1ang co 1o! no! UC (9)han c'&c ngh9ch t';ng t'& nh' d!ode 6a,!ca).

>eu t/n h!e"u 'a 6ao :ua tu& C?co (an k= d';ng la1!e"n the c'&c U ta0ng+ )han c'&c 1o! no! UC g!a81 nen !e"ndung cu8a 6a,!ca) #1o! no! UC% la1 tan *o dao o"ng cu8a ?g!a81 6a ng';&c la&!.

: M4/0. M*08"


34/125

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a1 cho t/n h!e"u L (a1 theo tan *o cu8a 1o"t 1a&ch daoo"ng nh; 6ong khoa )ha #


35/125

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: M4/0. $450. 2"5)? $.'" )?%&'#) $4^0 1D

:1 S@ >"


36/125

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#ch5 th';ng dung t,ong cac 1ay loa&! th';ng% do o ng';! tadung 1a&ch tach *ong t5 le". B'2'2 9ach tach /ong t le can ba:ng! oi CngX

0ang @,

%ang 2,

L 1*ong *ong C1co"ng h';8ng ;8 tan *o ?J. hW.

L:C:DLCco"ng h';8ng le"ch 6;! tan *o t,ung tanX 6/ du&X

L: C:co"ng h';8ng ;8 tan *o `?J. hW.

L Cco"ng h';8ng ;8 tan *o ?J. hW.

>eu t/n h!e"u _M 'a 6ao la khong thay o3! #ch'a co t/nh!e"u a1 tan 'a 6ao !eu che% th= t/n h!e"u ,a ;8 M 6a B

(aQng nhau th= dong :ua R1 16a R::(aQng nhau nen !e"n a)t,en Rkhong thay o3!+ do o khong co t/n h!e"u ,a .

- h! co t/n h!e"u a1 tan 'a 6ao !eu che th= t/n h!e"uL *e co tan *o thay o3! X >eu t/n h!e"u L 6ao co tan *o `?J. hW la1 cho !e"n a) t,en L: l;n h;n !e"n a) t,en Ldo o dong I1cI:la1 cho !e"n a) t,en R #VR% ta0ng danlen d';ng. >g';&c la&! neu t/n h!e"u _M'a 6ao co tan *o ?J.hW la1 cho VLc VL:+ dong I:c I1la1 cho VRg!a81 dan7uong a1. >h' 6a"yX neu t/n h!e"u _M'a 6ao co tan *o thay

o3! 7ung :uanh ?J.hW #do !eu che% th= !e"n a) t,en R *e

- BP -


37/125

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thay o3! #ta0ng 6a g!a81%+ ngha la ta thu ';&c t/n h!e"u a1tan nh' ;8 a! )hat 'a 6ao !eu che #t/n h!e"u a1 tan ala1 thay o3! tan *o *ong 1ang%.IV S O HO!I MA THU _M MONOD

D'@ Ahan t.ch,

R_ - AMPX khuech a&! cao tan+ la 1a&ch khuech a&!co"ng h';8ng co tan *o !eu ch5nh ';&c (aQng CVA+ nhaQ1khuech a&! t/n h!e"u thu t' Apng ten.

4" >"+)?Dta&o ,a t/n h!e"u h=nh *!n co tan *o O+ cungco tan *o thay o3! ';&c (aQng CVOong ch5nh 6;! CVA.

"9* $4)#t,o"n *ong%X t,o"n ha! t/n h!e"u o 6a a cho ,at/n h!e"u IL[ ?J.hW.

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a&! co"ng (a (!en the t,ung tan hoa2c (a tan khuech a&! co"ng(on (!en the t,ung tan nhaQ1 khuech a&! cho (!en o" l;nlen en 1o"t V33 #(!en o" 5nh 5nh% 'a en 1a&ch tach*ong.

_M - ETX tach *ong _MnhaQ1 ta&o la&! t/n h!e"u a1 tannh' ;8 a! )hat a 'a 6ao !eu che.

]: .%'(0. >4/* 4# $4)X Thong th';ng la *'8 du&ng ICkhuech a&! cong *uat OT

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ay thu AX (a0ng thong he&) do o kh! nghe a1 thanh(9 1at t!eng (a**-t,e(le 6= 6a"y nghe khong hay.

ay thu L-onoX (a0ng thong ,o"ng u8 (a** - t,e(lenh'ng a1 thanh ch'a *!nh o"ng do o ng';! ta )hat 1!nh ,a

a1 thanh L-Ste,eo cho ,a M loa 6a R ,!eng (!e"t +a1 thanh no3!

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38/125

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*!nh o"ng+ chat l';&ng cao a) 'ng ';&c nhu cau cu8a g!;!nghe nha&c *anh !e"u.

ay thu L-Ste,eo ,a ;! *au L -ono+ t,en th9 t,';ngco ,at nh!eu 1ay L-ono. Do o 1a a! )hat L-Ste,eo

)ha8! )hat t/n h!e"u *ao cho 1ay thu L-ono thu ';&c 6a ayu8 thong t!n. >g';&c la&!X 1ay thu L-Ste,eo cung )ha8! thu ';&ct/n h!e"u cu8a a! )hat L-ono co t' t,';c.

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39/125

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M'2'2 5ac t.n hieu cua may phat ;9K, L Z RX co tan *o t' BJFW b ?hW cho t/n h!e"u L-

ono. JL ` RSBX a ';&c !eu che can (aQng cho 1ay thu

L-Ste,eo. S"5)? 2*) 1d .Dt/n h!e"u *ong (ao e3 thong (ao

cho 1ay thu la L-ono hay L-Ste,eo. $ong th;! t/n h!e"u *ong(ao dung e3 ong (o" 6e )ha g!'a dao o"ng B@hW cu8a a!)hat 6a 1ay thu.

0- P."9 0%4 $) .*'+% _M-S$'8'"

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40/125

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a&ch lo&c co (a0ng thong t' BJ FW b ?hWX lay t/n h!e"u\R *au o ';&c khuech a&! 6a 'a en kho! 1a t,a"nq.

>goa! ,a neu 1ay thu ';&c t/n h!e"u L-ono hoa2c t/n h!e"u Ath= cung :ua 1a&ch lo&c nay ,o! 'a en tang t!en khuech a&!.

a&ch lo&c co (a0ng thong MB b B hW lay t/n h!e"u b R#DSU% 'a en tang g!a8! 1a DSU ta&o la&! t/n h!e"u -R e3 'aen kho! 1a t,a"nq.

a&ch lo&c co CF[ ?HhW lay t/n h!e"u *ong (ao 'a en1a&ch nhan M e3 'a en kho! g!a8! 1a L-Ste,eo. >eu thu';&c t/n h!e"u nay th= 1a&ch g!a8! 1a L-Ste,eo 1;! hoa&t o"ng+con neu khong co hoa2c yeu co th= *e tat khong gaynh!e3u.

ho! 1a t,a"nq #co"ng 6a t,'% e3 ta&o ,a t/n h!e"u M6aMR 'a en kho! khuech a&! a1 tan cho ,a loa.

h! chuX t,ong ,ad!o t' *au tang tach *ong L en1a&ch t!en khuech a&! ch5 co 1o"t IC la1 nh!e"1 6u& g!a8! 1aL-Ste,eo #L 1ult!)le7e,%. cac IC g!a8! 1a L thong du&ng nh' X

TABKB Y A>K?J Z

^8 cac 1ay thu ;! cu khong co dao o"ng B@FW+

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41/125

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42/125

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[:] ."(* "20*D1a&ch dao o"ng ta&o ,a t/n h!e"u o t,o"n6;! t/n h!e"u A e3 co ';&c IL theo nguyen tac IL [ o - A[?J+ FW nh' kh! t/n h!e"u A thu t' anten thay o3! th= o *e thayo3! theo e3 g!' 6'ng t/n h!e"u t,ung tan.

[: ."(* I_ AMPLIDkhuech a&! t/n h!e"u t,ung tan *aocho co (!en o" u& l;n e3 cung ca) cho tan tach *ong.

[: ."(* ETECTORX 1a&ch tach *ong L d'&a 6ao *'&thay o3! tan *o cu8a *ong 1ang luc nay a ';&c tha)thanh t/nh h!e"u t,ung tan co tan *o ?J+ FW e3 ta! ta&o la&!t/n !e"u a1 tan a ';&c g'8! t,ong *ong 1ang.

[:[ ."(* EMUTIPLEfDkho! )ha kenh la1 ch'c na0ngg!a8! !eu che t/n h!e"u L *te,eo e3 co ';&c t/n h!e"u *te,eo t'a! )hat *te,eo.

[:g ."(* A_CD #Auto1at!c L,e:uency Cont,ol% la1 ch'cna0ng t'& o"ng !eu ch5nh tan *o cu8a 1a&ch dao o"ng *ao chog!' 6'ng ';&c t/n h!e"u t,ung tan t,ong t,';ng h;&) t/n h!e"u*ong 1ang (9 thay o3!.

T,ong th'&c te cac kho! U


43/125

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h';8ng cho&n a! luc nay do co"ng h';8ng *ong *ong nen to3ngt,;8 cu8a khung co"ng h';8ng cho&n a! co g!a t,9 l;n nhat t/nh!e"u cu8a a! )hat o *e co co (!en o" l;n cac a! )hatkhong co"ng h';8ng to3ng t,;8 cu8a 1a&ch *e nho8 6a (9 loa&!(o8 7uong 1a** thong :ua ';ng nguon cung ca).

- T/n h!e"u cu8a a! )hat ';&c cho&n 'a 6ao chan EMkghuech a&! lan th' M lay ,a ta&! chan C t,o"n 6;! t/n h!e"ucu8a 1a&ch dao o"ng.

- CVO+CTO+ *ong *ong cuo"n day P la khung dao o"ng ta&o Ot,o"n6;! t/n h!e"u ata&! chan C M ta co ';&c t/n h!e"u t,ung tan cotan *o ?J+FW.

- T/n h!e"u t,ung tan ';&c l!en la&c :ua (!en the the t,ung tanco"ng h';8ng ;8 tan *o ?J+ FW 6a tha&ch anh e3 'a en

tang khuech a&! t,ung tan.- DM la d!ode (!en dung nha"n !e"n the ALC t' 1a&ch tach*ong !eu ch5nh )han c'&c kh! t/n h!e"u cu8a a! )hat thay o3!tan *o *e la1 t/n h!e"u t,ung tan thay o3! do t/n h!e"u Okhong ';&c thay o3! nen t/n h!e"u ,a le"ch kho8! tan *o?J+FW do o t/n h!e"u :ua cac cuo"n day co"ng h';8ng t,ungtan (9 *uy g!a81 (!en o" ang ke3. Ch/nh !eu nay *e la1thay o3! !e"n the ALC la1 thay o3! !e"n the )han c'&c DMthyay o3! !e"n dung cu8a DM+ thay o3! !e"n dung cu8a 1a&ch daoo"ng+ thay o3! tan *o cu8a 1a&ch dao o"ng cho en tan *ot,ung tan a&t ung g!a t,9 ?J+FW th= 1a&ch 1;! tho! !euch5nh.

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44/125

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thanh 1a&ch lo&c (a0ng thong.Chan ? IC nha"n t/n h!e"u C#L,e:uency Ca,,y% t' cac a! )hat ! :ua 1o"t tang khuech a&!t,ong IC *au o ! ,a ;8 chan B ta&! ay co M *ong *ong 6;! CV? +CT? co"ng h';8ng cho&n a! . *au kh! cho&n ';&c ? a! )hat naoo co tan *o la A t/n h!e"u nay *e ';&c 'a 6ao chan K ICthong :ua tu& l!en la&c CB en tang tang t,o"n *ong t,ong IC.

-Ta&! chan @ IC co cuo"n day B *ong *ong 6;! CVM+ CTM la

1a&ch dao o"ng ta&o O 'a 6ao chan @ IC en tang t,o"n *ong(en t,ong.

- Chan P IC la ngo8 ,a cu8a tang t,o"n *ong ta co ';&c t/nh!e"u t,ung tan co tan *o ?J+ FW :ua (!en the t,ung tan 6atha&ch anh CL co"ng h';8ng ;8 tan *o ?J+ FW loa&! (o8 cac t/nh!e"u ha! t,ong :ua t,=nh t,o"n *ong ch5 l!en la&c t/n h!e"u t,ungtan 'a en tan khuech a&! t,ung tan ;8 )h/a *au.

- DM la d!ode (!en dung ';&c )han c'&c ngh9ch+ lay !e"nthe ALC ta&! au d';ng !eu ch5nh tan *o dao o"ng *ao cho t/n

h!e"u t,ung tan luon ';&c o3n 9nh kh! t/n h!e"u A thay o3!.

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48/125

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cu8a IC thong :ua cac 1a&ch lo&c thong tha) 6a cao *au ocung ca) cho tang a1 *ac .

?- a&ch !e"n #e1 h=nh 6e%

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49/125

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Aha"n cau hi on tap,

Cau ?X Ve *; o kho! 1ay thu L.

Cau MX T,=nh (ay nh!e"1 6u& cac kho! t,ong *; o kho! Rad!o L.

Cau BX eu lay t/n h!e"u AL *au tach *ong 'a en tang a1*ac 1ay hat ';&c khongs

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Aha"n tom ta=t bai hoc,- Rad!o L th';ng *'8 du&ng B ICX IC cao tan+ IC t,ung tan

\ tach *ong+ IC )han kenh.- o"t *o 1ay *'8 du&ng )han cao tan (aQng 1a&ch !e"nM t,an*!*to,.

- ho! cao tan go1 co cac thanh )hanX- Uo" lo&c (a0ng thong.- huech a&! cao tan.- Co"ng h';8ng cho&n a!.- Dao o"ng.- ho! t,ung tan 6a tach *ong dung chung ? IC ch5 co

cuo"n day tach *ong a2t ;8 ngoa!.

- ho! )han kenh nha"n t/n h!e"u t' IC t,ung tan t'& g!a!1a L *te,eo (en t,ong 6a cho ,a t/n h!e"u a1 tan*te,eo cung ca) cho tang a1 *ac.


50/125

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PHAN II CASSETTE

B47* 1D S O HO!I RAIO `CASSETTE

I- CA!U TRUC TONG UAT MA RAIO - CASSETTE

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51/125

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- >guon !e"n ';&c lay t' day ca1 AC 'a en congtac cho&n nguon !e"n ??J6 b MMJ6 'a 6ao cuo"n *; ca) (!enthe ha& a).

- Cuo"n th' ca) (!en the ha& a) cung ca) !e"n the

tha) #P6 b ?M6% cho 1a&ch ch5nh l'u.- >guon !e"n *au kh! ch5nh l'u co da&ng DC ! :ua la k!1

t,ong ack ca1 AC co ha! 69 t,/X

N'(% 0"5 4#& 04^ AC K45 *'+)$,7 )?%") 3*)

- Day M cu8a la k!1 t,ong ack ca1 AC lay !e"n DC ,a+ t'

ay ch!a la1 M ';ng en cong tac Rad!o bTa)e t,en (oa,dch/nh 6a en la k!1 t,en he" c;X

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53/125

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II- SW LIEN E!T CAC THANH PHAN TRONG MA RAIO `CASSETTE

- >h' chung ta a (!et t,ong 1ay Rad!o b Ca**ette conh!eu thanh )han nh' Rad!o A+ L+ Ca**ette+ CD Z666. Cac

thanh )han nay ch5 hoa&t o"ng lan l';&t ch' khong hoa&t o"ngong th;!+ do 6a"y e3 chuye3n o3! cac ch'c na0ng hoa&t o"ngcu8a 1ay t';ng 'ng 6;! cac thanh )han th!et (9 ng';! tadung cong tac chuye3n o3! nguon cung ca) 6a nguon t/nh!e"u+ con go&! la cong tac g!ao hoan #Lunct!on%.

- $o! 6;! cac 1ay Rad!o Ca**ette thong du&ng th= cong tacnay dung da&ng c; kh/

- $o! 6;! cac 1ay Rad!o- Ca**ette !eu kh!e3n t' 7a caccong tac nay ng';! ta dung cac cong tac !e"n t'8+ th';ng

la cac d!ode hoa2c cac IC cong tac chuyen dung lay le"nh!eu kh!e3n thong :ua IC 6! 7'8 ly.

1- N?%") 0%)? 04(3D- Co ha! nguon cung ca) ch/nh t,ong 1ay Rad!o- Ca**etteX4- N?%") $8,@50 "9) 453 JB1.

- >guon nay t,';c kh! ! 6ao 1ay luon luon ! :ua congtac cho&n ch'c na0ng #Rad!o - Ta)e% cung ca) cho cac thanh)han t!eu thu& dong l;n nh'X o t;+ khuech a&! cong *uat+1a&ch o3n a+ en ch5 th9 666.

- T,ong cac 1ay thong th';ng th= ng';! ta dung congtac c; kh/.

- T,ong cac 1ay co !eu kh!e3n t' 7a do dong l;n nenng';! ta dung cac Relay thong :ua !eu kh!e3n cu8a IC 6! 7'8 ly.

- N?%") 24% "9) 453 JB:D

- >g';! ta dung cac 1a&ch o3n a) (aQng t,an*!*to, hoa2c IC*au o cung ca) cho cac thanh )han con la&! t,ong 1ay.

- T,ong cac 1ay thong du&ng th= *'8 du&ng cong tac c; kh/+1o"t *o 1ay l!en la&c t,'&c t!e) en cac thanh )han khact,ong 1ay thong :ua cac !e"n t,;8 co la") 6a tu& lo&c.

- T,ong cac 1ay co !eu kh!e3n t' 7a+ nguon nay cothe3 ';&c cung ca) t,'&c t!e) :ua cac !e"n t,;8 co la") nh'ngcung co ';&c !eu kh!e3n (aQng cach thay o3! !e"n the )hanc'&c cho cac t,an*!*to, ca) t' IC 6! 7'8 ly.

- T,@)? $,/D *eu trong may co them cac thanhpha"n thiet bN #hac nh 50! thO cung /e c #et noinh tren

- K -


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: - N?%") $) .*'+%D

>guon t/n h!e"u cu8a cac th!et (9 *au kh! a ';&c 7'8 lythanh t/n h!e"u a1 tan co ha! kenh *e ! :ua K cong tac cho&nch'c na0ng #Rad!o b Ta)e% e3 cung ca) choX

- Fa! ';ng t/n h!e"u en 1a&ch a1 *ac *au o en 1a&chkhuech a&! cong *uat )hat ,a loa.

- Fa! ';ng t/n h!e"u en 1a&ch khuech a&! gh! ,o! enau t' e3 gh! len (a0ng.

- o"t *o 1ay co ch5 th9 t/n h!e"u+ th= t/n h!e"u con ';&c'a en 1a&ch nay.

III - CAC THUAT NG UNG TRONG MA RAIO `CASSETTE

- P OXER AMPLIX huech a&! cong *uat.- GRAPHIC EUALIkERX a&ch a1 *ac nh!eu nut ch5nh 6;!

nh!eu tan *o.

- POXER SUPPLX Uo" nguon cung ca) !e"n cho 1ay.

- BP_ #Uand a1 cha1.

- AGC#Auto1at!c a!n Cont,ol%X a&ch t'& o"ng !eu ch5nh o"l;&! .

- _M X# L,e:uency odulat!on% b y8 thuya"t !eu che t/n h!e"ula1 thay o3! tan *o t/n h!e"u *ong 1ang #U!en !e"u tan *o%.

- -


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- AMD #A1)l!tude odulat!on% b y8 thuya"t !eu che t/n h!e"ula1 thay o3! (!en o" t/n h!e"u *ong 1ang #U!en !e"u (!eno"%.

- BIAS OSCI #U!a* O*c!lat!on%X 1a&ch dao o"ng ta&o t/n h!e"u

7oa (a0ng 6a )han c'&c au t' kh! gh!.- VU METERX a&ch ch5 th9 t/n h!e"u.

- VOLX #Volu1e%X U!en t,;8 ch5nh a1 l';&ng.

- UBBINGX h! t/n h!e"u t' Ta)e A *ang Ta)e U.

- TUNERDThu t/n h!e"u t' *ong !e"n t' #RADIO%.

- HIGH SPEEX Toc o" cao dung kh! *ang (a0ng toc o"nhanh.

- NORMAL SPEEX Toc o" (=nh th';ng.

- VCO#Voltage Cont,olled O*c!lat!on%X a&ch dao o"ng co !eukh!e3n (aQng !e"n the.

- VAC #Volt* Allte,at!ng Cu,,ent%X $!e"n the 7oay ch!eu.

- TP #Te*t


56/125

RADIO

- AVCX #Auto1at!c Voltage Cont,ol% T'& o"ng !eu ch5nh !e"nthe

- AVCX #Auto1at!c Volu1e Cont,ol% T'& o"ng !eu ch5nh a1l';&ng.

- -

Aha"n tom ta=t bai hoc,

- T,ong 1ay Rad!obCa**ette go1 co nh!euthanh )han th!et (9 nh' Rad!o A+ Rad!o L+ Ca**ette+ CD*'8 du&ng chung nguon cung ca) 6a kho! a1 tan #1a&cha1 *ac 6a khuech a&! cong *uat%.

- Cac thanh )han ,!eng ,e t,ong 1ay hoa&to"ng lan l';&t thong :ua cac cong tac cho&n ch'c na0ng#Rad!o b Ta)e%.

- T,ong cac *; o 1ay Rad!o- Ca**ette ng';! ta*'8 du&ng ,at nh!eu thua"t ng'8 t!eng Anh 6!et tat nene3 o&c ';&c *; o )ha8! (!et cac thua"t ng'8 nay.


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Aha"n cau hoi on tap

C4#%1X Fay ke3 ten cac kho! t,ong 1ay Rad!o- Ca**ette.

C4#%:X Fay cho (!et ch'c na0ng cac kho! t,ong 1ay Rad!o

Ca**ette.C4#%X $e3 l!en ket cac kho! t,ong 1ay Rad!o ca**ette+dung l!nh k!e"n naos

C4#%]X Co 1ay loa&! nguon cung ca) t,ong 1ay Rad!o bCa**ettes Fay ke3 ten t'ng loa&!.

C4#%X >guon ch'a o3n a) t,ong 1ay Rad!o- Ca**ette cungca) cho nh'ng thanh )han naos

C4#% X >guon *au o3n a) t,ong 1ay Rad!o- Ca**ette cungca) cho nh'ng thanh )han naos

C4#% [X $e3 !eu ch5nh t/n h!e"u a1 tan cho tang cong*uat t,ong 1ay Rad!o ca**ette ng';! ta dung l!nh k!e"n naos

C4#% gX $e3 cung ca) t/n h!e"u a1 tan cho tang a1 *act,ong 1ay Rad!o ca**ette ng';! ta dung l!nh k!e"n naos

C4#% dX >go8 ,a cu8a tang cong *uat co l!nh k!e"n naos

C4#% 1X Ta&! *ao nguon U\t' 1a&ch nan !e"n )ha8! ! :uala k!1 t,ong ack ca1 ACs

C4#%11X ay ca**ette lay t/n h!e"u t' aus Thong :ua l!nhk!e"n naos

C4#%1:X ay Rad!o lay t/n h!e"u t' aus Thong :ua l!nhk!e"n naos

C4#%1X ay CD lay t/n h!e"u t' aus Thong :ua l!nh k!e"nnaos

C4#%1]X fack )hone* co cong du&ng g=s

- @ -


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BAI :D BO NGUON RAIO ` CASSETTEI- AlC IEM CHUNGD

- a&ch nguon t,ong 1ay Rad!o bCa**ette co ket cau ;n

g!a8n thong th';ng !e"n a) *au kh! ';&c ha& a) (aQng(!en the *e ';&c ch5nh l'u thanh nguon DC (aQng Mk!e3uX ch5nh l'u M (an ky 6a ch5nh l'u toan ky.

- a&ch o3n a) thong du&ng la dung t,an*!*to, khuech a&!dong o3n a) (aQng d!ode Wene,+ o! kh! dung IC.

- >h'ng 6!e"c )han )ho! nguon cho cac thanh )han t,ong1ay kha )h'c ta&) do )ha8! ! :ua cac la k!1 t,en he" c;6a cong tac cho&n ch'c na0ng

#Rad!o b Ta)e%

- o"t *o 1ay co the1 cac ch'c na0ng khac nh' Du((!ng+CD+ !ne !n+ th= cang )h'c ta&) h;n.

II- IEU CONG TAFC : CHC NAmNG RAIO- TAPE

1M4/0. >*'+)De1 h=nh M.?

P.4#) $0. 4/0.D

- >guon AC 'a 6ao (!en the thong :ua cong tac ??J- MMJ6

- Cuo"n th' ca) (!en the ca) !e"n cho 1a&ch ch5nh l'u

toan ky .';ng U\

? lay ,a ';&c 'a en la k!1 t,ng ack ca1AC co M t,a&ng tha!X

>eu co ack ca1 AC *e lay !e"n t' (o" ch5nh l'u .

>eu khong co ack ca1 AC lay !e"n t' nguon )!n.

- >guon U\?lay ,a t' ack ca1 AC *e ch!a la1 M ';ng!6ao cong tac Rad!o b Ta)e 6a ! 6ao la k!1 t,en he" c;.

- h! chuye3n cong tac Rad!o b Ta)e *ang 69 t,/ Rad!o nguonU\?*e ca) !e"n cho 1ay nh'ng 1o t; khong :uay neu ta an

(at ky )h!e1 nao t,en he" c; la k!1 ong *e ca) !e"n cho1o t; :uay.

- h! chuye3n cong tac Rad!o b Ta)e *ang 69 t,/ Ta)e nguon U\?*e khong ca) !e"n cho 1ay ch5 kh! nao ta an ? )h!e1 t,enhe" c; la k!1 ong 1;! ca) !e"n cho 1ay.

*h vay,

- P vN tr. La%io may c cap ien trc tiep

- P vN tr. 1ape may c cap ien $ua la #im tren

he c'

- H -


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- U\? *e ca) !e"n choX 1a&ch o3n a)+ 1a&ch cong *uat+ 1ot;.

- >guon *au o3n a) U\M *au o3n a) *e cung ca) cho tat ca8cac thanh )han khac t,ong 1ay.

II IEU CONG TAFC : CHC NAmNG RAIO- TAPE-SLEEP

SK''3D ngha la ngu8X kh! ta chuye3n cong tac cho&n ch'c na0ng6e 69 t,/ nay 1ay *e hat t/n h!e"u t' Rad!o neu ta an )h!e1*'+)De1 h=nh M.M:P.4#) $0. 4/0.D

- >guon AC 'a 6ao (!en the thong :ua cong tac ??J- MMJ6

- Cuo"n th' ca) (!en the ca) !e"n cho 1a&ch ch5nh l'utoan ky .$';ng U\? lay ,a ';&c 'a en la k!1 t,ong ack ca1AC co M t,a&ng tha!X

>eu co ack ca1 AC *e lay !e"n t' (o" ch5nh l'u.

>eu khong co ack ca1 AC lay !e"n t' nguon )!n.- >guon U\?lay ,a t' ack ca1 AC *e ch!a la1 M ';ng+ !

6ao cong tac Rad!o b Ta)e 6a ! 6ao la k!1 t,en he" c;.

- h! chuye3n cong tac Rad!o b Ta)e *ang 69 t,/ Rad!o nguonU\?*e ca) !e"n cho 1ay nh'ng 1o t; khong :uay+ neu ta an(at ky )h!e1 nao t,en he" c; la k!1 ong *e ca) !e"n cho1o t; :uay.

- h! chuye3n cong tac Rad!o b Ta)e *ang 69 t,/ Ta)e nguon U\?*e khong ca) !e"n cho 1ay+ ch5 kh! nao ta an ? )h!e1 t,enhe" c; la k!1 ong 1;! ca) !e"n cho 1ay6a 1o t;.

- h! chuye3n cong tac Rad!o b Ta)e *ang 69 t,/ Slee) nguon U\?*e khong ca) !e"n cho 1ay ch5 kh! nao ta an ? )h!e1 t,enhe" c; la k!1 ong 1;! ca) !e"n cho 1ay t';ng t'& nh' 69 t,/

Ta)e ngha la kh! het (a0ng 1ay t'& tat (aQng he" thong AutoSto) t,en he" c; *e tat nguon toan 1ay. uc nay nguon *auo3n a) ca) !e"n cho tang Rad!o nen ta nghe ';& ct/n h!e"u t'Rad!o.

*h vay,

- PJ -


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- P vN tr. La%io may c cap ien trc tiep

- P vN tr. 1ape va


61/125

RADIO

Q(@ /e cap ien cho, mach on ap! mach cong /uat!mo t'

- *guo"n /au on ap Q(2 /au on ap /e cung cap chotat ca cac thanh pha"n #hac trong may'

- P vN tr. *'+)#e1 h=nh M.B%

M. P.4#) $0. 4/0.D

-T,en he" c; co M (o" la k!1 1ac *ong *ong ';&c a2t

t,en ha! he" c;.- h! cong tac ;8 69 t,/ Ta)e 6a Du((!ng 1ay lay !e"n

thong :ua la k!1

- e1 cong tac S]B ta thay ay la cong tac ca) nguoncho 1a&ch o3! toc t,ong 1ot;.

- h! ;8 69 t,/ Rec \ Du((!ng 1a&ch o3! toc ';&c ca) !e"nla1 ta0ng toc o" 1o t;+ con tat ca8 cac 69 t,/ khac 1a&cheu khong ';&c ca) !e"n.

PM

Aha"n tom ta=t bai hoc,

- >guon cung ca) t,ong 1ay ca**ette co ha! thanh )hanXnguon khong o3n a) 6a nguon co o3n a)

- >guon khong o3n a) cung ca) choX 1ot;+ o3n a) 6a ICkhuech a&! cong *uat.

- >guon khong o3n a) ';&c cung ca) thong :ua congtac cho&n ch'c na0ng 6a la k!1 t,en he" c;.

+ V9 t,/ Rad!o ca) !e"n t,'&c t!e) cho 1ay.+ V9 t,/ Ta)e ca) !e"n cho 1ay :ua la k!1 t,en he"

c;.

- >guon *au o3n a) ca) !e"n cho cac thanh )han conla&! t,ong 1ay.

- Co M da&n ca t,'&c t!e en cac IC thon ua !e"n


62/125

RADIO

PB


63/125

RADIO

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+

M

AC IN

R

RADIO - DUBBING - TAPE

SW3

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CASSETTE RADIOJAC AC

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R2

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220!

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CD - DUUI> - TASkArT

SW1

P

R

SW4

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.3SP

A!TE!!A

S O NGU EN L NGUON AWNG CONG TAFCRAIO - TAPE - UBBING - C

O>A

220!

SW7

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T8"1

SW6

7 3

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15

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SW3

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65/125

RADIO

-

+

M

SW1

VCC

T8"1

110!

+ C1

PI!

RADIO - TAPE-DUBBING

NGUEN L CA!P NGUON CAI TIE!N

SW7

RADIO - TAPE-DUBBINGSP

AC IN

MAWCH

OI

TO!C

AGSAgC

DUBBING-TAPE-RADIO

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SW4

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JAC AC

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O>Ah!e"1 6u& he" c; kh/ la keo (a0ng ca**ette d! chuye3n t,ongho") (a0ng 6a )hat ,a t/n h!e"u a1 thanh+ t/n h!e"u a1 thanhnay ;8 da&ng (!en o" nho8.

&5 .*'+% 0"#)? %/)? 0%4 0450 3. 4()D

PLAD eo (a0ng :ua au t' 6;! 6a"n toc khong o3!e3 (a8o a1 chat l';&ng a1 thanh. >gay ca8 t,ong cac

t,';ng h;&) nguon cung ca) 6a he" *o 1a *at (a0ng thayo3!

RECD Che o" gh! t/n h!e"u len (a0ng.

__D fa8 (a0ng nhanh theo ch!eu


67/125

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0- RECD

h! an )h/1 nay+ )h/1


68/125

RADIO CASSTTE

c.ot;X la1 nh!e"1 6u& ch/nh t,ong 6!e"c chuye3n o"ng cu8a he"c;+ ta&o l'&c cho dan c; hoa&t o"ng+ thong th';ng 1ot; hoa&to"ng d';! *'& !eu kh!e3n cu8a t!e) !e31 la k!1

d.Cac )h/1 (a1X la1 nh!e"1 6u& cho&n cac t,a&ng tha! hoa&tcu8a (a0ng ca**ette+ thong th';ng cac )h/1 (a1 hoa&t o"ng

';&c g!' la&! (aQng cac 1oc ga! c; kh/.e.Cac (anh 7e t,uyen o"ngX la1 nh!e"1 6u& chuye3n o3! cac

t,a&ng tha! hoa&t o"ng cu8a (a0ng ca**ette.

. Day cu,oaX la1 nh!e"1 6u& t,uyen l'&c :uay t' 1ot; 6ao cac(anh 7e t,uyen o"ng.

]- PHAN LOAWI HE C D

T,ong he" c; ca**ette ';&c )han ch!a la1 cac loa&! nh' *auXFe" c; Auto *to)+ Fe" c; Auto Re6e,*e+ Fe" c; !eu kh!e3n.

II- MOT SO! LINH IEN UAN TROWNG TRONG HE CD1- BAmNG T CASSETTED

4- C4(% $4/" 3.4#) K"4/*

Ua0ng ca**ete ';&c cau ta&o (;8! *;&! day nh'&a to3ng h;&)+t,en o ';&c )hu8 1o"t l;) (o"t t' go1 nh!eu ha&t t' *a)7e) khong theo t,a"t t'&+ tuy theo l;) (o"t t' 1a ng';! ta ch!athanh cac loa&! (a0ng nh' >o,1al - O7yt C,o1 b etal.

Cach )han (!e"t B loa&! (a0ng nay la nh=n ch' !n t,en

(a0ng hay 6o8 ho") (a0ng. Tuy nh!en ta co the3 nh=n d';! ayho") (a0ng co ky h!e"u khoa8ng t,ong thay o3!+ (a0ng etalco khoa8ng t,ong l;n h;n O7yt C,o1+ (a0ng O7yt C,o1 # C,OM %khoa8ng t,ong l;n h;n (a0ng >o,1al.

- C450 >,@7)? ?.* $8'#) 4o)?D

o"t (a0ng t' ca**ete kh! ch'a gh! th= t' t,';ng t,en (a0ng*a) 7e) ho4n loa&n. h! gh! t,en (a0ng+ cac ha&t t' ';&c *a)7e) theo t,a"t t'& nhat 9nh #go&! la cac ';ng gh!X t,ack%.

U A p> F I S T E R E O

$ A jk T n eS T E R E O $ A jk T n eC O > O

U A p> F I C O > > O

$ A jk T n eC O > O

h! )hat+ cac ';ng gh! t,en (a0ng ! :ua khe t' cu8a aut'+ ta&o ,a t/n h!e"u d';! da&ng !e"n the 'ng.

T,';c kh! gh!+ ng';! ta lay t/n h!e"u tan *o cao ;8 au t'7oa chong len t/n h!e"u cu go&! la 7oa.

- PH -


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RADIO CASSTTE

V;! (a0ng Ca**ette ';&c gh! 6;! au t' 1ono th= ch5 co M';ng gh! #M t,ackX A 6a U%. $';ng gh! cu8a ? 1a2t (a0ng gh!1ono #A hoa2c U%+ co o" cao (aQng M lan o" cao cu8a M ';nggh! o! 6;! (a0ng gh! *te,eo+ do o kh! *'8 du&ng (a0ng gh! 1ono)hat 6;! 1ay *te,eo th= ta 6a4n nghe ';&c M ';ng t!eng ,a loanh'ng g!ong nhau.

V;! (a0ng Ca**ette ';&c gh!6;! au t' Ste,eo th= co K u;nggh! #1o4! 1a2t (a0ng A 6a U *e coM ';ng gh! l!en t!e) 6;! nhau%.

h! dung (a0ng gh! *te,eo)hat 6;! 1ay *te,eo th= ta *e nghe';&c M ';ng t!eng o"c la") ;8t'ng loa

:- 4% $,7a.H;). 4/)? C4(% $4/"X

- o1 co cuo"n day :uan t,enlo! *at ghe) t' nh!eu la *at+ lo!*at co ? khe h;8 nho8 go&! la khe t'+n;! ay dung e3 t,ao o3! t/n h!e"ug!'a au t' 6a (a0ng t'.

-he t' ';&c th!et ke co o",o"ng )hu h;&) *ao cho co the3 l!en

la&c ';&c t' t,';ng t' (a0ng totnhat *ong (a8o a1 khong ta&o t't,;8 l;n la1 g!a1 c';ng o" t'thong t,ong lo! *at *e la1 g!a1(!en o" t/n h!e"u ,a. #7e1 h=nh M 6aB%

- Do o kh! au t' *'8 du&ng laungay (9 1on+ nen khe t' ,o"ng la1g!a1 (!en o" cac t/n h!e"u co tan

*o cao cu8a t/n h!e"u a1. P.,@)? 3.453 $.4& $.'( 6470.h). >4% $,7D

- $au t' 1ay 1onoX F!e"n t,enth9 t,';ng khong co (an cac lo&a!au t' cu8a 1ay 1ono nh'ng 6a4ncon kha nh!eu 1ay 1ono con *'8du&ng do o ta )ha8! dung au t'*te,eo e3 thay the.

Cac (';c t!en hanh nh' *auX

- J -

Dayt/nh!e"u Day

1a**F=nh P

F=nh ?

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$ e ( a 0n g t '

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F=nh M

F=nh B

C F y> F O rC

F=nh K

F=nh

> O rI C F E cO C F A G> $ A j T n eS T E R E O

$ E tT F A e> F $ A j T n e O > O


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RADIO CASSTTE

?.Thao oc ;8 )h/a co )ad co 9nh.

M.>;! oc ;8 )h/a )ad co lo 7o. Chu y khong thao oc ,akho8! he" c; co the3 la1 6a0ng 1at lo 7o. #7e1 h=nh K%

B.Dung 1o8 han thao day ,a kho8! au t'.

K.Cho&n au t' *te,eo 1;! co ch!eu cao )ad ung (aQng au t'cu.

.$au cheo day nh' h=nh .

P.Fan day t/n h!e"u 6ao au t'. Chu y day 1a** la day(o&c g!a) han ;8 )h/a co 9nh

.an au t' 6ao he" c;.

@.Cho 1ay hat 6;! (a0ng chua3n.

H.Ch5nh oc ;8 )h/a co lo 7o cho en kh! 1ay hat nghe

t!eng t,e(le hay nhat.- $au t' 1ay *te,eo da&ng B day #1a** chung%X )h';ng )ha)

au day nh' h=nh P

- $au t' *te,eo da&ng day#day 1a** no! 7uong *';n he" c;e3 chong nh!e3u%. Cac (';c t!enhanh t';ng t'& nh' t,en nh'ng)h';ng )ha) au day nh' h=nhX

5hu y, +hi a can chnh

cho may hat phai th ghi t.nhieu t La%io va phat lai neunghe nho phai oi a"u %ay t.nhieu'

4% $,7 45& A%$" R'6'82' 4/)?e"4&X

$au t' ';&c (o t,/ t,en he" c;#7e1 h=nh @%

Cac (';c thay the 6a can ch5nh

1Thao oc au t' #7e1 h=nh H%.

:Thao that day au t' 6aohe" c;.

>hac au t' ,a kho8! he" c;.

] $o k!e31 t,a 7ac 9nh au t'7oa 6a au t' gh! )hat #au t'7oa co !e"n t,;8 nho8 h;n thongth';ng khoa8n - ?J Oh1%.

h! chu la&! 1au day.

Thao day ,a kho8! au t'.

- ? -

F=nh

F=nh@

V/t !euch5nh a1

F=nh ?J

F=nhH

V/t g!'8au t'6ao he" c;


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RADIO CASSTTE

[ >hac o3 7oay ,a kho8! 1a1 7oay.g Cho&n au t' 1;! co ';ng k/n 6a ch!eu cao ung (aQng

au t' cu #7e1 h=nh ?M%.d $o oh1 t,en au t' 1;! 7ac 9nh cac t,a&1 han cu8a au

t' 7oa 6a gh! )hat.

1 Fan day au t' 6ao o3 7oay.11 an o3 7oay 6ao 1a1 7oay t,en he" c;.1: Co"t day au t' 6ao he" c;.1 Cho 1ay )hat 6;! (a0ng

chua3n.1] Ch5nh oc ;8 )h/a co tay

on cho en kh! 1ay hat hay nhat#7e1 h=nh ?J%.

4% $,7 A%$" R'6'82' 4/)?


72/125

RADIO CASSTTE

- M"#$@D

a. H;). 4/)?X e1h=nh ?

C4(% $4/"D

o1 ha! thanh )han c; (a8n t,ong ? 6o8 6a 1a&ch o3n 9nh toco" cho 1ot;.

- ot; go1 co M thanh )han *ta,to la thanh )han co 9nh';&c cau ta&o (;8! 1o"t lo8! na1 cha1 6nh c'8u h=nh t,u& ,o3ng#h=nh?P%.

- Roto, la )han :uay hay con go&! la )han 'ng la B cuo"n day:uan t,en lo8! *at co B ca&nh h=nh canh :ua&t 6a ';&c ca) !e"n(aQng ha! la k!1. #7e1 h=nh ? 6a ?P %

0- &5 .*'+%D

Thong th';ng )han 1ot;h' khong the3 *'8a ch'a hoa2c

,at 1at th;! g!an th';ngng';! ta ch5 *'8a ch'a ;8)han o3n toc cho 1ot;.

- P.4#) K"4/*D

!. Theo d!e"n a) la1 6!e"c

Cac 1ot; thong du&ng t,en th9 t,';ng co !e"n the la1 6!e"claX PVY .VY HVY ?MV

-Theo ch!eu :uay cu8a 1ot;+ co M loa&!

Ch!eu :uay thua"nX :uay cung ch!eu k!1 ong ho. T,enot; gh! la CX

\ Ch!eu :uay ngh9chX :uay ng';&c ch!eu k!1 ong ho. T,en1ot; gh! la CCX

-Theo toc o" :uay cu8a 1ot;+ co M loa&!X

\ oa&! 1ot; ? toc o" #1ot; M day%X S'8 du&ng hau het o!6;! cac 1ay Ca**ette thong th';ng.

\ oa&! 1ot; M toc o" #1ot; K day%X oa&! nay *'8 du&ng 6;!

1ay M ho") (a0ng dung e3 gh! toc o" (=nh th';ng hoa2c toco" nhanh. oa&! nay ngoa! M day lay !e"n gh! #\% #-% con M daydung e3 thay o3! toc o" la A 6a U.

- B -

ot;

a&ch o3ntoc

F=nh?

F=nh?K

F=nh?P


73/125

500

R5

33"

/VCC

D2C1 !R

R6 10

D1

Q2

562

R1 2)7

C2 3)3MF

R7 120

M

+

-

Q1

C1815

R2 27"

R4 309

R3 207

RADIO CASSTTE

- >goa! ,a con co cac loa&! 1ot; dung t,ong au ca1 #auDeck%. h! thay the can chu y en toc o" :uay cu8a 1ot;+thong du&ng co B toc o"X ?@JJ R1*+ MMJJR1*+ MKJJR1*.

- ot; t,ong 1ay ca**ette 7e h;! *'8 du&ng 6;! !e"n the ?B+M6.

- M4/0. "9) $"(0 "# $@D

4- M4/0. "9) $"(0 %7)?DM4/0. >*'+)

- N.*'+ 6%/ 0450 K*).


74/125

RADIO - CASSETTE

+ o t; :uay ,at nhanh ch5nh (!en t,;8 khong co h!e"u :ua8Xcha&1 1o! no! CEM.

+ o t; :uay *a! toc o" ch5nh (!en t,;8 co h!e"u :ua8 nh'ngkhong t=1 ';&c !e31 1o t; :uay ung toc o"X (!en t,;8 (9chay.

+ An )lay 1o t; khong :uay dung tay a3y (anh t,;n 1ayhat (=nh th';ngX tu& CPg!a1 t,9 *o.

(.M4/0. "9) $"(0 %7)? ICX

- h! 1a&ch o3n toc t,ong 1ot; (9 h' ho8ng+ taco the3 thay (aQng 1a&ch o3n toc dung ICA?M co ket cau ;n g!a8n+ hoa&t o"ng o3n9nh. T,ong 1a&ch nay (!en t,;8 VR dung e3thay o3! toc o" :uay cu8a 1ot;. Ch5nh (!ent,;8 theo ch!eu k!1 ong ho 1o t; :uay nhanh+ng';&c k!1 ong ho 1ot; :uay cha"1.

- h! thay 1ot; co 1a&ch o3n toc la) *azn (en t,ong+ neu1ua nha1 1o t; 1;! co ch!eu :uay ng';&c 6;! ch!eu :uaycu8a 1o t; cu. $e3 1o t; :uay ung ch!eu ta )ha8! cat 1a&chau day a8o ch!eu ca) !e"n cho 1o t;.

- hong ';&c a8o ch!eu ca) !e"n len 1a&ch o3n toc+ 6= *ela1 h' ho8ng IC o3n toc.

0C450


75/125

k

V

DUUI>

?Jk

R3

5$6

R6

5$6

R5

15$

R4

5$

R8

15$

VR?

Q2

C1815

R2

15$

?Jk

Q1

C1815

REC

VRB

kR1

15$

VRM

SW1


76/125

RADIO - CASSETTE

III-HE C AUTO STOPD

Fe" c; Auto *to) la cac he" c; co the3 t'& o"ng tat 1aykh! hat het (a0ng. F!e"n t,en th9 t,';ng co M lo&a!X

T'& o"ng tat 1ay (aQng c; kh/.

Tu& o"ng tat 1ay !eu kh!e3n (aQng !e"n t'8

1H'+ $."()? >*'%


77/125

RADIO - CASSETTE

nhau e3 cung ca) cho !eu kh!e3n ta&o ,a le"nh !eu kh!e3n )huh;&).

-Thong th';ng ng';! ta *'8 du&ng cac lo&a! ca81 (!en nh'Yca81 (!en dung cac lak!1+ ca81 (!en t' 6a ca81

(!en :uang.- ho! !eu kh!e3nX nha"n

t/n h!e"u t' ca81 (!en nha"nda&ng cac t/n h!e"u e3 nha"n(!et t,a! khe t,en 1a1:uan (a0ng con :uay haykhong t' ay *e co le"nh!eu kh!e3n )hu h;&) cungca) cho 1a&ch khuech a&!dong t' ay ca) dong cho

1o"t Soleno!d ta&o l'&c taco"ng 6ao he" c; e3 tat 1ay.

- Fe" c; la c; cau cha) hanh !eu kh!e3n

M. *'9% 4/0. 2, %/)? 04 *'() 4q)? K45 g';! ta dung nhong M tang t,ong o co ? nhong a2tle"ch ta1. >hong nay co the3 a2t chung t,u&c 6;! 1a1 :uan(a0ng+ hoa2c co the3 thong :ua he" thong nhong t,uyen o"ng

e3 :uay theo 1a1 :uan (a0ng kh! 1ay )hat.- h! 1ay hat (=nh th';ng nhong ,a0ng :uay thanh t,';&t la

k!1 *e t,';&t t,en nhong le"ch ta1 do o cac la k!1 lan l';&tchuye3n o3! 69 t,/ t!e) 7uc+ cacla k!1 lan l';&t ';&c no! tat.>h' 6a"y ta co the3 7e1 cacca81 (!en t';ng t'& nh' 1o"tcong tac t'& chuye3n o3! t,ong:ua t,=nh 1ay ang hat+ 6a

ch5 ;8 t,a&ng tha! co 9nh kh!cac a ca1 khong :uay.

-


78/125

RADIO - CASSETTE

- M4/0. >*'+)#h=nh B?%

r N.*'+ 6%/ 0450 K*). eu ? ong 6;! B CM 7a !e"n :ua cuo"n *oleno!d tu& CMt,ong. h! ? ong 6;! M C? 7a :ua CM do o tu& CM khong the(9 ay nen l!en tu&c duy t,= dong I(cho ? (a8o hoa M ng'nga4n khong ca) dong ccho cuo"n day *oleno!d khong taco"ng 6ao he" cc; kh/ 1ay hoa&t o"ng (=nh th'ong.

- !a8 *'8 he" c; co *'& co hoa2c het (a0ng t,a! khe t,en1a1 :uan (a0ng khong :uay+ cac t!e) !e31 ch5 ;8 ? t,angtha! duy nhat nen tu& CM khong co !eu k!e"n 7a !e"n. h!tu& C? na&) ay !e"n I([ JV ? ng'ng da4n nen Mda3n ca)dong cho cuo"n *oleno!d tac o"ng 6ao he" c; kh/ la1 tat1ay.

MAWCH IEN CAM BIE!N BApNG RELA UE

4C4 *'()D

- H -

D1

Q1R5

47"

R1

330

+ C210"#

VCC

R4

105

SW1

33"#

R2

1""

Q2R3

10

+C1

SOLE!OID

F=nh B?.


79/125

RADIO - CASSETTE

- Relay :ue co da&ng t,on da!6o8 thuy8 t!nh co the3 nh=n thay';&c (en t,ong.

- >g';! ta dung 1o"t 6anhna1 cha1 co t' t,';ng khong

eu th';ng ';&c a2t t,en (o"e1 *o 6ong + t' (o" e1 *o6ong co day cua b ,oa 1ang6ao t,a! khe t,en 1a1 :uan(a0ng.

- h! con (a0ng t,uc :uan(a0ng con :uay keo (o" e1 *o6ong :uay eu t' t,';ng :uet:ua Relay :ue thay o3! l!en tu&c la1 la k!1 ong 1;8 l!en tu&cay la t,a&ng tha! khong tac o"ng 6ao he" c; kh/.

- h! het (a0ng t,u&c :uan (a0ng khong :uay (o" e1 *o6ong khong :uay t' t,';ng :ua Relay :ue khong thay o3!la1 la k!1 ch5 ;8 1o"t t,a&ng tha! nhat 9nh ong hoa2c1;8 ay la t,a&ng tha! tac o"ng 6ao he" c; kh/ la1 tat1ay .

- >goa! ,a ng';! ta con dung ? *o l!nh k!e"n (an da3n nh'IC Fald kh! co t' t,';ng u8 l;n :uet :ua IC *e la1 !e"nt,;8 IC g!a1 nho8 ang ke3.

- @J -

?

M

B

K

Relay :ue

Vanh na1cha1

F=nh B?+ Ca81(!en t'

IC Fald


80/125

RADIO - CASSETTE

M4/0. >*'+)#h=nh BM

N.*'+ 6%/ 0450 K*). g';! ta dungo"t a u&c lo3+ a)ha8n 7a& anh *ang hoa2c a co da&ngh=nh canh :ua&t #7e1 h=nh BM% t,en a co1o"t (uly ';&c 1ang day cua- ,oa 6aot,a! khe t,en 1a1 :uan (a0ng.

-


81/125

RADIO - CASSETTE

- h! het (a0ng t,u&c :uan (a0ng khong :uay a khong:uay anh *ang ch!eu len :uang t,;8 khong thay o3! la1g!a t,9 !e"n t,;8 cu8a :uang t,;8 ;8 1o"t g!a t,9 nhat 9nhl;n nhat kh! (9 che to! nho8 nhat kh! ';&c ch!eu *ang ayla t,a&ng tha! tac o"ng 6ao he" c; kh/ la1 tat 1ay

M4/0. >*'+).

N.*'+ 6%/ 0450 K*). 4% $,7 e"4&

- @M -

+C1

+

C7

R7

33"

Q1

R4

33"

VCC

R6

1"0R1"

47"

Q2CDS

SOLE!OID

Q3

D2

R2

27$

220"#

R5105

C51n

47"#

+

C8

D1

+

C1

33"#

+C2

100"#

R310

+

C6

D3

R1

608

1"#

R9802

220"#

R847$

F=nh BK


82/125

RADIO - CASSETTE

e1 1a&ch !e"n nh' h=nh BK.

-Ta thay ha! (anh e) ';&c (o t,/ 6e ha! )h/a t';ng 'ng6;! ha! cot (anh t,;n ';&c 1ang day cua ,oa *ao cho lu;n:uay ng';&c ch!eu nhau.

-Thanh t,uyen a3y (anh e) *e d! chuye3n theo )h';ngngang 1o3! kh! 1ay o3! ch!eu )hat .T,ong h=nh 6e 1ay ang;8 t,a&ng tha! )hat theo ch!eu t' t,a! *ang )ha8! + thanht,uyen a3y (anh e) d! chuye3n 6e )h/a )ha8! a3y (anh e))ha8! e 6ao cot (anh t,;n *e a3y (a0ng :ua au t'

4/)? >4% $,7


83/125

RADIO - CASSETTE

4/)? :

BAI ]D TANG HUE!CH AWI CONG SUA!T

I .45* i%45$1N?%&'#) $4^0 0.%)?D

-Tang cong *uat t,ong 1ay Rad!o Ca**ette la tang khuecha&! o"ng l'&c cung ca) t/n h!e"u cho loa.

- >go 6ao cu8a tang cong *uat lay t/n h!e"u t' 6olu1e.

- >go ,a t/n h!e"u cu8a tang cong *uat en ack ca1 )hone:ua t!e) !e31 th';ng ong t,ong ack ca1 )hone *au o enloa.

-Thong th';ng cac IC cong *uat co nho1 ta8n nh!e"t+nh'ng 1o"t *o 1ay cong *uat nho8 th= khong co ta8n nh!e"t.

- >guon cung ca) cho tang khuech a&! cong *uat ';&c layt,'&c t!e) t' U?\khong ! :ua o3n a).

:P.4#) K"4/*D

-T';ng t'& nh' cac loa&! A1)l! dung t,an*!*to, cac A1)l! IC t,ong1ay ,ad!o ca**ette cung co cac loa&!

-

>1-X Dung nguon ;n+ *'8 du&ng tu& l!en la&c t/n h!e"u ,a loa.Co cong *uat khong l;n khoa8n ?] en 6a! ?J]. Thongth';ng cac 1ay Ca**ette e3 (an cong *uat nho8 *'8 du&ng

- @K -

IE UA>F E

!e3u (anh e) t't,en 7uong

Da&ng B

F=nh BP


84/125

RADIO - CASSETTE

loa&! nay. Ta thay co ? IC cong *uat cho M loa 6a dung nguon;n.

- >5-,o"t *o 1ay Ca**ette co cong *uat l;n *'8 du&ngk!e3u A1)l! IC dung nguon o! th';ng la cac 1ay dan F! L!khong *'8 du&ng )!n. Cac IC t,ong 1ay *'8 IC ho& STZ

- Q1-,S'8 du&ng M IC t,ong ? 1ay+ t'c la ? IC cho ? loa+ cong*uat t';ng o! l;n co the3 *'8 du&ng k!e3u OT hoa2c OC e3ghe). oa&! nay M day ,a loa khong co day no! a**.

II IC 0"#)? 2%4($


85/125

N-L +

C1

""-16V

+C6

1""-16V

+ C7

1"""F

5

+

C3

-16V

+C5

"-16V

4 +

C 9 1"""-16V

10

14

2

1

6

SPEAK 2

N-R

+

C14

1""-16V

2

11

13

LA ]g

+

C4

-16V

3

#12V - 20V

+C 2 4 7- 16 V

R1

4'7

8

C13

1"4

9

R2

4'7

1

+

C8

1""-16V

+

C 12 1" "" -1 6V

7

C11

1"4

C1"

1"4

12

SPEAK 1

RADIO - CASSETTE

C450 4/0. >*'+) >*'9) .;).D

a- a&ch ?X #e1 h=nh K.M%

IC A KJ@ *'8 du&ng t,ong 1ay Rad!o b Ca**ette h!e"u >at!onalodel RL ?JJJ

- Chan M6a chan ?B la ngo8 6ao lay t/n h!e"u t' chau

g!'a (!en t,;8 6olu1e thong :ua cac !e"n t,;8 ha&n (!en )ho!h;&) t,;8 khang 6a tu& l!en la&c nga0n DC Chan B 6a chan ?M lango8 6ao a8o nha"n t/n h!e"u ho! t!e) (en t,ong IC con go&! lachan >L #>egat!6e Leed(ack%. Uen ngoa! chan IC nay dung tu&no! 1a** thoat t/n h!e"u ho! t!e) 7uong a** e3 ta0ng o" l;&!cho IC cong *uat. Ta co the3 no! t!e) !e"n t,;8 6a! chu&c 6ao ha! tu& ta&! chan nay e3 g!a1 o" l;&! IC nh' 1ong 1uon.

- Chan K 6a chan ?? l!en la&c t/n h!e"u ,a loa thong :ua tu&nga0n DC.

- Chan P 6a chan H co tu& ho! t!e) #tu& t'& c'8%.- Chan @ lay ngu;n U\.

- Chan ? tu& lo&c nguon tha) t,ong IC #LX oN L!lte,%.

- Chan 6a ?J tu& lo&c nh!e3u tan *o cao.

- @P -

F=nh K.M. A1)l! OT dung ICAKJ@


86/125

RADIO - CASSETTE

(- a&ch MX ICKKKJ #e1 1a&ch !e"n h=nh K.B%

- C; (a8n IC AKKKJ co cau t,uc t';ng t'& nh' IC A KJ@ nh'ngco the1 cac chan ch'c na0ng khac

- Chan ?J 6a chan ?M l!en la&c t/n h!e"u ,a loa thong :ua tu&nga0n DC cac tu& nay th';ng co !e"n dung kha l;n khoa8nKJL - ?JJJL+

- ChanH 6a chan ?B co tu& ho! t!e) #tu& t'& c'8 %.

- Chan ?? lay ngu;n U\.

- Chan tu& lo&c nguon tha) t,ong IC #LX oN L!lte,%. Tu& nayco !e"n dung ?JJL- KJL.

- Chan ? 6a tu& ta0ng o" l;&!. uon thay o3! o" l;&! ta ganthe1 !e"n t,;8 no! t!e) 6;! tu& ta&! ha! chan nay. !a t,9 !e"nt,;8 ty8 le" ngh9ch 6;! o" l;&! cu8a IC #!e"n t,;8 ta0ng+ o" l;&!g!a1%.

- Chan K nha"n t/n h!e"u la1 ca1. >eu chan nay nha"n1'c !e"n the 6 hoa2c l;n h;n *e la1 ca1 tang khuech a&!cong *uat.

- @ -

8

C1"

1"4

7

6

+

C 8 1"""-16V

1

C91"4

R1

4'7

+C 2 4 7- 16V

5

LA 4440 4

N-R

3

N-L

M$TE

1 +

C 7 1"""-16V

SPEAK 2

2

14

2

+

C5

1""-16V

13

SPEAK 1

12

+C4

1""-16V

+ C1

1"""F

11

#12V - 20V

10

+

C3

47-16V

+

C6

1""-16V

R2

4'7

9

F=nh K.B. A1)l! OT dung ICAKKKJ


87/125

RADIO - CASSETTE

0- M4/00. X IC A MMJP ';&c *'8 du&ng ,o"ng ,a! t,ong cac Rad!o-Ca**ette T,ung uoc IC nay t';ng ';ng 6;! cac IC IA MJM+AK?HM+ TAPH.

- @@ -

+

C 8 1"""-16V

12

C1"

1"4

+C4

1""-16V

2

SPEAK 2

+

C3

47-16V

+

C11

47-16V

+ C1

1"""F

#12V - 20V

R1

4'7

N-R

1 +

C 7 1"""-16V

SPEAK 1

+C 2 4 7- 16 V

3

6

9

R2

4'7

10

14

1

8

KA2206

+

C6

1""-16V

R3

4'7

R4

4'7

5

7

2

+

C12

47-16V

N-L

11

+

C5

1""-16V

C9

1"4

4

F=nh K.K1a&ch khuech a&! cong *uat dungICAMMJP+ @]


88/125

F=nh K. Cong *uat dung ICAK?HM+ @]

+

C 12 1 "" "- 16 V

11

2C1"

1"4

R1

4'7

+ C7

1"""F

+

C3

47-16V

+C6

1""-16V

C13

1"4

+

C14

1""-16V

N-L

2

+

C4

1-16V

+

C 9 1 "" "-1 6V

4

1

8

+

C1

1-16V

6

N-R

+

C8

1""-16V

10

+C 2 4 7- 16 V

7

5

#12V - 20V

3

R2

22"

1

R2

4'7

LA]1d:

SPEAK 1

9

SPEAK 2

R2

22"

12

RADIO - CASSETTE

- @H -

F=nh K.P Cong *uat dung IC

+

C8

1""-16V

+

C 12 1 "" "- 16 V

12

8

C11

1"4

+C6

1""-16V

10

9

#12V - 20V

4

+ C7

1"""F

2

+

C1

1-16V

R2

4'7

1

1

SPEAK 2

+

C 9 1"""- 16V

C1"

1"4

R1

4'7

11

+C 2 4 7- 16 V

R2

22"

4

2

+

C3

47-16V

C13

1"4

7

5

+

C4

1-16V

R2

22"

+

C14

1""-16V

3

SPEAK 1

6

N-L

TA[:

N-R


89/125

RADIO - CASSETTE

III IC 0"#)? 2%4($


90/125

RADIO - CASSETTE

:P.4#) $0.D

- CFAG> I> \lay t/n h!e"u t' chau g!'a (!en t,;8 6olu1e :uatu& l!en la&c+ thong th';ng t,en ';ng t/n h!e"u nay co tu&khoa8n 6a! t,a01 en 6a! ngan )L e3 loa&! nh!e3u tan *o cao6a luon luon co !e"n t,;8 khoa8n 6a! chu&c no! a** ay

ch/nh la !e"n t,;8 )han c'&c cho tang khuech a&! 6! *a! ngo86ao IC.

- Chan I>-con go&! la chan >L #>egat!6e Leed(ack% chan ho!t!e) a1. T/n h!e"u ho! t!e) t' ngo8 ,a loa 'a 6e ';&c th'&ch!e"n (en ngoa! IC (aQng RB+ co tu CM 6a !e"n t,;8 RM thoat t/nh!e"u AC e3 ta0ng o" l;&!.

+ >eu !e"n t,; 8 RM nho8 th= o" l;&! ta0ng 6a ng';&c la&!

- Chan LX la chan co nguon tha) t,ong IC t,h';ng IC co1a&ch o3n a) cho tang *'9) .;).D

aK 9ach @, S5 L #>egat!6e Leed(ack%

- H? -


91/125


92/125

RADIO - CASSETTE

(. M4/0. :D dung IC STKJKP da&ng 1o"t IC cung ca) t/n h!e"ucho ? loa.

- C.4#) 1:+ ?KX ay nguon Vcc.

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C.4#) D >o! 1a**.- C.4#) 1D ay t/n he"u 6ao co !e"n t,;8 Pk no! 1a** la

!e"n t,;8 )han c'&c DC cho ngo8 6ao 6! *a! cu8a IC.

- C.4#) :D >go8 6ao t,' nha"n t/n h!e"u ho! t!e).

- C.4#) ]X $!e"n t,;8 )han c'&c cho nguon dong haQng t,ongIC.

- C.4#) D Ca) nguon tha) :ua !e"n t,;8 ?JJ cho t=enkhuech a&! t,ong IC.

- C.4#) D>ha"n le"nh la1 ca1 tang cong *uat d';! da&ng!e"n a) 6.

- C.4#) [DTu& chong dao o"ng t'& k/ch tan *o cao.

- C.4#) gDChong dao o"ng t'& k/ch tan *o cao.

- C.4#) dD Chong dao o"ng t'& k/ch tan *o cao tangkhuech a&! a8o )ha.

- C.4#) 1DT';ng t'& chan H.

- C.4#) 11DT';ng t'& chan @.

- C.4#) 1 1 1[ 1gD Cac !e"n t,;8 o3n 9nh nh!e"t chotang khuech a&! cong *uat.

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: P.4#) $0.D

- Ve nguyen tac cau t,uc IC UT cung t' cac IC OT hoa2cOC ghe) .Tuy nh!en cac ngo8 6ao t/n h!e"u co thay o3!.

- e1 h=nh K.?J+ ngo8 6ao co"ng cu8a kenh th' ha! ';&c no!1a** e3 chong nh!e3u.

- >go8 6ao t,' kenh th' ha! nha"n t/n h!e"u t' ngo8 6ao t,'cu8a kenh th' nhat khuech a&! a8o )ha nen ngo8 ,a loa ta coha! t/n h!e"u a8o )ha nhau.

- ^_ ngo8 ,a loa ';c& no! t,'&c t!e) en loa khong co tu& ,aloa.

M4/0. >*'+) >*'9) .;).

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P.4#) $0.D- Chan M lay t/n h!e"u t' chau g!'a (!en t,;86olu1e :ua tu& l!en la&c+ thong th';ng t,en ';ng t/n h!e"u nayco tu& khoa8n 6a! t,a01 en 6a! ngan )L no! 1a** e3 loa&!nh!e3u tan *o cao.

- Chan B con go&! la chan >L #>egat!6e Leed(ack% chan ho!t!e) a1. T/n h!e"u ho! t!e) t' ngo8 ,a loa 'a 6e ';&c th'&ch!e"n (en t,ong IC+ (en ngoa! ch5 co tu& 6a !e"n t,;8 thoat t/nh!e"u AC e3 ta0ng o" l;&! ong th;! cung ca) t/n h!e"u cho ngo86ao t,' cu8a kenh th' ha! #chan %. >h' 6a"y ta co M t/n h!e"u

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