UHF/VHF FM TRANSCEIVER PX-777/328/338

SERVICE MANUAL

------------------CONTENTS-------------------------- INTRODUCTION……………………………………………………2 GENERAL ................................................................................. 2 REALIGNMENT……………………………………………………..3 TROUBLE SHOOTING GUIDE……………………………………6 TECHNICAL SPECIFICATION ............................................. …7 FUNCTION SPECIFICATION…………………………………….8 CIRCUIT DESCRIPTION ......................................................... 9 SEMICONDUCTOR DATA.............................................……. 16 PARTS LIST............................................................................ 17 BLOCK DIAGRAM …………………........................................ 22 PCB BOARD………………………………………………………23 SCHEMATIC DIAGRAM....................................................... 25

INTRODUCTION SCOPE OF THIS MANUAL This manual is intended for use by experienced technicians familiar with similar types of commercial grade communications equipment. It contains all required service information for the equipment and is current as of the publication data. Changes which may occur after publication are covered by either Service Bulletins or Manual Revisions. These are issued as required. ORDERING REPLACEMENT PARTS When ordering replacement parts or equipment information, the full part identification number should be included. This applies to all parts : components, kits, or chassis. If the part number is not known, include the chassis or kit number of which it is a part, and a sufficient description of the required component for proper identification. PERSONNEL SAFETY The following precautions are recommended for personnel safety: DO NOT transmit until all RF connectors are verified secure and any open connectors are properly terminated. SHUT OFF and DO NOT operate this equipment near electrical blasting caps or in an explosive atmosphere. This equipment should be serviced by a qualified technician only. SERVICE This radio is designed for easy servicing. Refer to the schematic diagrams, printed circuit board views, and alignment procedures contained within.

GENERAL Your Transceiver is an electronic product of exact design and should be treated with care .The suggestions below will help you to fulfill any warranty obligations and to enjoy this product for many years. Do not attempt to open the unit. Non-expert handling of the unit may damage it. When using regulated power supply, take notice of power voltage must be between 6V and 8V to

avoid damaging the unit. Do not store the Radio under the sunshine or in hot areas.

High temperatures can shorten the life of electronic devices, and warp or melt certain plastics. Do not store the Radio in dusty, dirty areas Keep the Radio dry. Rainwater or damp will corrode electronic circuits. If it appears that the Radio diffuses peculiar smell or smoke, please shut off its power

immediately and take off charger or battery in the Radio, then contact with PUXING agency. Do not transmit without antenna.

REALIGNMENT

1. MODE: USER MODE: For normal use, when turn on enter this mode. PC MODE: used to read and program radio. SELF-PROGRAMMING MODE: Hold down [MONI] and [menu] key accomplished by turning on the VOL/POWER switch until “SELF” displays.

2.

2. LCD DISPLAY

3. SELF-PROGRAMMING MODE For frequency,signal,feature write to the radio

TECHNICAL SPECIFICATION

General

Frequency Range 136 ― 174MHz ， 350 — 390MHz ， 400 —

470MHz,245Mhz Working Temperate －20℃―＋50℃ Operating Voltage DC 7.2V Operate Mode Simplex or Semi-duplex

Channel spacing 25Khz/12.5Khz Dimension 100mm×55mm×32mm (Not included Antenna) Weight 220g (Including battery) Antenna impedance 50Ω Transmitter Frequency Stability ±2.5PPM Output Power 5W/4W ±0.5W Max Frequency Deviation ≦5KHz Audio Distortion ≦3% Modulation Character +3dB—-3dB Adjacent Channel Power ≥65dB Spurious Radiation ≤7.5UW Occupied Bandwidth ≤16KHz Receiver RF Sensitivity ＜0.2UV Audio Distortion ≦3% Audio Response +2dB—-10dB Adjacent Channel Selectivity ≥60dB Intermodulation Rejection ≥60dB Spurious Response ≥60dB Blocking ≥80dB

CPU PIN FUNCTION PX-777ITEM DESCRIPTION I/O FUNCTION

1 CLK ROM I/O CLOCK AND EEPROM2 D0 O Key scan output3 D1 O Key scan output4 D2 O PLL clock port/Key scan output5 D3 O PLL data port/Key scan output6 PLL CS O PLL CS port7 LAMP2 O Lcd/backlight control output8 K1 I Key scan input9 K2 I Key scan input10 K3 I Key scan input11 K4 I Key scan input12 AVDD MPU+5MV13 RX0 O IF output control port14 RX1 I IF input control port15 TX1 I MIC input control port16 TX0 O MIC output control port17 BEEP/QT O BEEP output /CCTCS tone signal output18 ACC MPU power filter19 AVSS Connect to VSS20 APC/TUNE O Automatic power &frequency automatic gain output 21 AT X O Transmitter data output select control22 AR X I Receiver data input/audio amplifier adjustment input23 BATT Test O Battery check /Reset24 VOX I VOX input25 AN SQL I Squelch signal input port26 OSCin I Internal oscillator input27 OSCout O Internal oscillator output28 VSS GND 29 EN1 I Encoder data input30 EN2 I Encoder data input31 MONI I Monitor key input32 Reset I CPU reset port33 Vdd +5V power supply34 5TC O TX power supply control output35 LED G O LED green36 TXD/LED R O RX232 output/ LED red37 AFC O Audio amplifier control input38 5CC O Power supply control output39 P-AMP O Audio amplifier power supply control output40 N/W/LD O Unlock detection41 PTT/RX D I PTT key input/RX232 input42 HT1621 CS I LCD CS port43 LAMP1 O Backlight control output44 DQT O DTC audio signal output

Footprint Comment Quantity

电容类 备注

C0402 0.5P 2 C332 C349C0402 1P 1 C231C0402 1.5P 1 C346

C423 C456 C315 C317_2 C313_2 C175C535 C536 C537 C538 C315_2 C314_2C416 C415 CAP CAP C593 CAP

C387_1 C318_1 C316_2 C312_2 C326_1 C227C121 C132 C135 C133 C142 C144C156 C223 C222 C322 C612 CAPR808 C386_1 C146 C145 C176 C122C123 C455 C515C413 C269 C254 C610 C451C623 CAP C633 C529 C528 C613C450 C665_1 C105 C581 C520 C701C174 C181 C244 C247 C321 C351C668 C454 C621 CAP C594 C301C514 C392 C391CAP CAP C257 C268 C266 C267C411 C453 C202 C203 C561 C271C663_1 C388_1 C319_1 C250 CAPC103 C101 C573 C571 C511 C521C182 C208 C316 CAP C354 C662CAP C302 C418 C102 C147 C661C201 C131

C0402 105P 4 C517 C611 C609 C664C263 C255 C361 C363 C362 C213C348 C330 C331

C0402 120P 1 C259C0402 12P 3 C224 C241 C359C0402 15P 1 C113C0402 18P 3 18NH C523 C246C0402 1P 2 C327 C329

C264 C265 C394 C513 C512 C592C591

C0402 222P 1 C272C0402 223P 2 C421 C417C0402 224P 1 C256C0402 22P 1 C353C0402 273P 3 C414 C556 C555C0402 27P 1 C134C0402 332P 2 C426 C432C0402 333P 1 C516

C0402 220P 7

32103PC0402

37104PC0402

PX777 part list(136-174MHz)

33102PC0402

C0402 100P 12

Designators

910PC0402

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C0402 33P 2 C126 C343C0402 3P 2 C226 C232

C262 C258 C546 C666 C311 C221C112 C111 C127 C125 C141 C233C177 C317 C243 C314 C355 C312C356 C358 C313 C204 CAP C310C412 C622 C632 C531 C534 C533C180 C260 C532 C173 C667

C0402 473P 3 C424 C431 C458C0402 47P 2 C393 C324C0402 5P 2 C215 C347C0402 680P 2 C428 C433C0402 683P 1 C543C0402 6P 1 C352C0402 82P 1 C395C0402 8P 3 C211 C229 C235

0603电容C0603 10P 5 C163 C167 C165 C169 C154C0603 15P 3 C153 C161 C164C0603 20P 1 C152C0603 22P 3 C168 C166 R818C0603 470P 1 C162C0603 56P 1 C155C0603 6P 2 C325 C344C0603 104P 1 L333太阳电诱C0805 0.1uF 4 E367_1 E364 E411 C541C0805 1uF 4 E454 E319_1 C104 C143C0805 2.2uF 4 E435 E413 E363_1 E474

E412 E242 E326_1 E180 E311 E273

R0402电阻L121 R457 R663 R364_1 R363_2R235 R134 R362 C251 R662

R0402 1.8K 1 R365_1R413 R301 R524 R113 R131 R363R321 R314 R352R594 R595 R269 R547 R529 R528

R391 R351 R459 R809 R223R258 R429 R434 R453 R201R543 R184 R333 R203 R111R561 R101 R361_2 R820

R0402 10R 4 R458 R127 R125 R354R541 R582 R392 R172 R175 R174R173 R170 R171 R583

R0402 150R 2 R456 R362_2R0402 15K 4 R519 R522 15K R478

C0805 4.7uF 6

R0402 0R 10

11

1410K

R0402 100R

150K

C0402 470P 35

9100KR0402

R0402

R0402

10

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R0402 180K 2 R265 R263R0402 18K 2 R414 R187

R573 R591 R593 R251 R254 R411R666 R312_2 R313 R667 R668R417 R596 R393

R0402 1K5 2 R421 R124R0402 1M 2 R664_1 R183R0402 1M8 2 R428 R433R0402 2.2K 1 R261R0402 2.7K 1 R259R0402 220K 4 R252 R551 R181 R512R0402 220R 6 R389_1 R331 R348 R312 R571 R244R0402 20K 3 R544 R472 R436R0402 22K 4 R552 R415 R313_2 R515R0402 22R 2 R112 R315R0402 270k 1 R665R0402 270R 3 R156 R155 R358R0402 27K 3 R556 R141 R555

R255 R452 R451 R455 R202 R302R103 R516

R0402 3.3K 3 R367_1 R366_1 R264R0402 30K 2 R422 R177R0402 330R 3 R128 R811 R126

R426 R427 R431 R432 R42333K

R0402 39K 1 R554R0402 3K3 4 R435 R355 R359 R357R0402 3K9 1 R123R0402 470R 1 R572R0402 470K 1 R553

R518 R592 R525 R527 R526R322 R581 R132 R142 R186 R182R597 R222 R221 R387

R0402 47R 4 R326_1 R133 R143 R247R272 R273 R574 R575 R576R243 R311 R538 R262 R271 L342L323

R0402 560R 3 R412 R368_1 R110R0402 56K 2 R311_2 R517R0402 5K6 2 R661 R356R0402 680K 1 R416R0402 680R 1 R114R0402 68K 2 R542 R185R0402 6K8 1 R424R0402 82K 2 R521 R523R0603 0R 3 L591 L133 L331

R1206电阻

4K7 12

82K2R0402

1KR0402

R0402

R0402

633KR0402

14

1547K

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R1206 0.39 3 R104 R105 R106L0603电感

L411 L511 L111 L122 100NH C697 高频叠层L326_1 L313 L315

L0603 101T 1 L521 瓷珠L0603 1UH 1 L391L0603 220NH 5 R807 L354 L351 L348 L242 高频叠层L0603 33NH 1 L143 高频叠层L0603 47nH 1 L352 高频叠层L0603 560UH 1 L392L0603 6.8UH 2 L321 L341

L611 L640 L131 L141 L227 瓷珠瓷珠

L1008 R12 4 L325 L343 L248 L316 绕线L0805 R22 1 L155 丰华绕线L1310 1uH 1 L168 太诱绕线L2520 1R0 2 L246 L132 太诱绕线L0805 68NH 3 L225 L229 L241 高频叠层L0805 R15 1 L215 绕线二极管类D_ESC B9 4 D322 D321 D342 D341D_ESC HSC277 4 D212 D235 D211 D111D_SMA 1SR154-400 1 D611D_USC 1SV220 1 D323D_USC MA77 1 D155D0603 GREEN 1 D571D0603 RED 1 D573D-ESC PMSD4148 2 D312_1 D311D-USC 3V 1 R806

D-USM-MA742 MA742 1 D661_1集成类SOP8 24C16 1 U561SOP8 LM4558 1 U411SOT24 3SK241 2 T241 T221SOT89 2SC4988 1 T121SRP8 10K 1 PR511SRP8 1K 2 PR752 PR311 1

SSOP10-P-225 TA7368F 1 U451SSOP16-225 TA31136 1 U261

SSOP8 LM2904V 1 U170U-SSOP20-225 LMX2332 1 U311_1三极管类T_ESM 2SC4617 3 T311 T421 T431T_ESM 2SJ243 1 T312T_ESM 2SK1824 1 T541T_ESM DTA114EE 2 T261 T573T_ESM DTC114EE 3 T451 T571 T572

L0805

9100NH

5101T

L0603

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T_SOT89 2SK3078 1 T131T_SOT89 5V 2 U631 U621T_TSM 2SK508NV 2 T331 T341T_USM 2SC4215 2 T251 T393 2SC4226T_USM 2SC4226-R25 3 T361 T352 T351 2SC4226T_USM DTC114EE 2 T181 T171T_TSM 2SB624 5 T452 T544 T101 T521 T3012SK3276 2SK3476 1 T141T_USM 1SS372 3 D411 T521 T301T_USM 2SC3356 1 T111T_USM DTC114EE 2 T181 T171T_USM MRF497 1 T411T_USV UMC4 1 T313

T-ESM-2SC47382SC4738 1 T662 BL放大最大T-ESM-DTA114EEDTA114EE 1 T661T-ESM-DTA114EEDTA114YE 1 T663电解类ECS2213 100uF 1 E457ELA3216 10uF 4 E456 E631 E623 E269晶体类

CR_DS0603 32.768KHz 1 CR521CR_DS6055 29.250MHz 1 FL251FX-DS0971 14.4MHz 1 CR311_1可调类VR1208 10K 1 VR552VR1208 50K 1 VR471线圈类LC042320 3T 1 L151 0.4*1.5*3LC042424 4T 1 L163 0.4*1.5*4LC042426 5T 2 L165 L167 0.4*1.5*5

L5T 8T 1 L142 0.31*1.5*8LC032326 6T 2 L211 L212 0.31*1.5*6其它类

PEF450R15KR1 450K 1 FL261QFP44 QFP44 1 U511ANT ANT 1 ANT111C28 C28 1 CR261

JK-ST-106 2.5mm 1 JK591JK-ST-301 3.5mm 1 JK592JP-18-1 18PIN 1 C681SW-SKRE ANKEY 2 AN593 AN591SW-SKRT ANKEY 1 AN592

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1 2 3 4 5 6

D

C

B

A

RV378100K

C378104P

32

54

1JK511

ST-301

2

54

1JK611

ST-106

R368560R

C313101P

R367

560R

C314101P

R365

2K2

C315101P

R3666K8

R3644K7E367

0.1uF E3631uF

E3640.1uF

L361

101T

PR3111K

R363

0R

R362150R

5CC

P-T

X/R

X

PLL_CS

PC3N/W/LD

DQTo

PC

1P

C2

PC

3P

C4

28.8MHZ

R361

0R

C834101P

C835101P

C836101P

C837101P

C838101PC831

101PC832101P

C833101P

PR81147K

PR8121K

C853101P

C856392P

C850104P

C857105P

C852221P

C858221P

C855333F

E8544.7uF

R85358K

R85568K

R85482K

R852R-1

R8582K2

R857

22K

L851101T

D813RED

D814GREEN

T813DTC114EE

T814DTC114EE

R814560R

R8154K7

R813560R

C817104P

T815DTA114EE

R8174K7

R816

10K

C818104P

R818

4K7

A01A12

GND4 DA 5CK 6A23 WP 7Vcc 8U821

24C08C827103P

R82710K

PC0

R8348K2

C372103P

C371223P

R371

4K7

R3754K7

R374

1K2

R3732K7

R3724K7

PC

7P

B3

PB

4P

B5

CR881

32.768KHz C883104P

C886104P R885

15K

R88482K

R883100K

L886301T

C81127P

C88227P

T881

2SB624

R886

0R

C885103P

R7010R

102P

R333

15KL347100nH

C351100P

L351

270nH

D3521SV325

L329

101TC347102P

R351180R

L352270nH

L35318nH

L3553.3uH

D351

1SV325

C3522P

C353

33P

C355

15P

C3595P

C3607P

C36110P

C3621P

T3512SK508NV(K52)

MOD

C27233P

C284104P

C285

221P

C286

221PC28710P

C288471P

C276

27P

C278104P

C275104P C274

104P

C280103P

E28310uF

R285180K

R2873K9

R286

180K

R2883K3

R27627K

R2741K2

R277100K

R283

100R

OSC

in1

Dec

6FI

L ou

t7

IF o

ut11

IF in

5

MIX

in16

AF o

ut9

RSS

I12

QU

AD10

MIX

out

3

OSC

out

2

FIL

in8

N-d

et13

N-r

ec14

Vcc

4

GN

D15

U261TA31136F

CR271C28

T275DTA114EE

C283104P

C282104P

R278

0R

C830102P

R833

150K

R831

150KR832150K

5V

PB1

RXi

ATX

QT

D0D1D2D3PC7PB3PB4

HT1621-CSGND_D

PC6

5VPB1

PB5

SB

PC4

C854103P

TX in

6N

.C.

7

RX

in11

V bi

as9

N.C

.10

Vss

8

C539

120PR539

100K

R540100K

C540104P

R52722K

C527150PC526

223PC525223P

C524104P

R528100K

R52922K

C542104P

R54147K

C528120P

R86610K

R86710K

R8643K3

R862

1K8

R865

20K

R863

100R

C867104P

C862332P

C863470P

T4612SK1824

C872473P

C871472P

R873

4K7

R872

4K7R8714K7

E87110uF

in

Gnd out

U9065A

C907103P

E90710uF

E90510uF

C905103P

C906

471P

5V

D/A20ATX21ARX22

AD1

23AD

224

AD3

25O

SCI

26O

SCO

27Vs

s28

Res

et32

Vdd

33

PA0 34PA1 35PA2 36PA3 37PA4 38PA5 39PA6 40PA7 41PB0 42PB1 43PB2 44PC0

1PC

12

PC2

3PC

34

PC4

5PC

56

PC6

7PC

78

PB3

9PB

410

PB5

11

PD3

31PD

129

PD2

30

AVdd12RXO13RXI14TXI15TXO16Tone17

AVss19 LC18U811

U-EM44

R868

4K7

R861RES

R71710K

C864104P

C529104P

5V

5CCP-TX/RX

MOD28.8MHZ

C281102P

GR

EE

NTX

D/R

ED

R379NC

R378

NC

N/W

/LD

C27120P

CR27221.250MHz

DEV MIX IN

SQL

CV

1

2

3

4

5

6

7

8

9

10

11

12

13

18

17

16

15

14

JP811

JP18

GND_D

R304100R

R713

100R

R714

100R

R7121KL711

101T

C304NC

C731102P

5V5C 5C

R71810K

C712221P

R846

4K7

R845

0RR844100R

R841

47KR842

47K

R843100R

321

SW811ASW/VOL

C842103P

C841103PSB

D3PB5

MIC+SP+

PTT/RXD

L902

101T

TXi TXi

P-AMPMIC

SB

AFin

APC/TUNE

D3

MONI

PB5

PTT

SP

N/WVOX

MIC

SBAPC/TUNE

D3

MONI

PB5

PTT

SP

SQL

VOX

O I

FL261450KPC6

PB

1

D0D1D2D3K1K2K3K4

LCD CS

LAMP 2

LAMP 1

SB

SB (T.Y.)

BE

EP

BE

EP

BEEPTXD/RED

BEEP

VOUT4 VDD 5GND3SDA1

RST 7GND 6OSC2 SCL 8

U511AUDIOR548

680RC548104P

C549104P

R5494K7

C547103P

C546

104P

R546330K

R54510K

R7020R

5M5MDQTo

C851104P

7 8 9 10 11 12

O I

FL25329.250MHZ

R433

1K8

L253

270nH

5V

C181102P

E1814.7uF

T1032SB624 R102

4K7R101

4K7C102104P

T201DTA114EE

C101104PC201

103P

R441

33K

C441

473P

R4431M8

R442

33K

C444104P

R44410K

C446470P

C445

473P

DTA114EE

C303470P

C302103P

C442

332P

C443680P

5C

5R

5R

5R5T

5T 5T

5T

MIC

5V 5V5V

5CCP-TX/RX P-TX/RX

R256

18K

R171

0.39RR172

0.39RR173

0.39R

R198

150K

R195150K

R196150K

R197150K

R194

150K

R192

150K

R185

10K

R193NC

R184220K

R18347K

R186

NC

R182

1M

R181

10K

R18739K

R188

47K

R189

18K

C195471P

C198NC

C173103P

C192

101P

C191102P

C185470P

C186103P

C188104P

2

31

84

U161ALM2904V

76

5

U161BLM2904V

T191DTC114EE

T181DTC114EE

APC/TUNE APC/TUNE

BA

TT

5T

5T

C447820P

C172105P

C171103P

C451103P

C448

332PR449

10K

R4471M8

R448

33KR451

3K3

T4512SC4617

R45247K

T4412SC4617

R446

33K

E4512.2uF

R45322K

C256103P

L402

101T

R401

470R

C402

104P

R4021K8

C403470P

R403100K

C404273P

R40418K

C407102P

R406750K

C406223P

R421820R

C422104P

E4212.2uF

R40522K

R43130K

C405102P

E4314.7uF

R432

1K5

R434

51K

C431

223PR4354K7

2

31

84

U411ALM4558

76

5

U411BLM4558

33

11

22

D4221SS372

T421MRF497

C438470P

R438100R

R4373K3

R4361K8

5T

C408102P

C401103P

T4312SK1824

C434

10P

C2143P

C215N.U.

C216470P

C217

0.3P

VC2206P

C2213P5

C222470P

C223

0.3P

VC2266P

C2274P5

C228470P

C231102P

C232102P

C233470P

C234

8P

C23710P

C238

0.5P

VC2416P

C2424P

C2526P

C230470P

R214N.U.

R217100K

R220100K

R223

0R

R226220K

R227100K

R228220R

R2290R

R2303K3

R231100R

L2123T

L213

3T

L2143T

L2163T

L21939nH

L22018nH

L2233T

L2243T

L23122nH

D215N.U.

D214HVC350B

D217HVC350B

D220HVC350B

T2313SK229

R213

100K

C205102P

R212

0R

C212

15P

C27233P

C254103P

C264104P

C284104P

R262

470RT261

2SC4215

R261

680K

R2642.7K

R2741K2

OSC

in1

Dec

IF o

ut

IF in

5

MIX

in16

RSS

I12

MIX

out

3

OSC

out

2

N-d

et13

N-r

ec14

Vcc

4

GN

D15

C273224P

C261103P

C2622P

C283104P

C282104P

R278

C243470P

C246

0.5P

C2474P

C250103P

R234100K

R237

0R

R2381KR239

220R L2273T

T2513SK229

L2520.56uH

C25115P

R2512.2K

R2421K

C206103P R252

1K

R254470R

C25315P

C26313P

R417

1M

T4112SC4738

33 1 1

22

D411MA742

R416

0R

C417104P

C415104P

R415100R

C416

470P

R414

270RC414

103P

R4135K6

5T

OSC

out

1

TX in

6N

.C.

7

RX

in11

TX A

out

5

Vdd

16

V bi

as9

RX

Aout

12

N.C

.10

N.C

.3

OSC

in2

Vss

8

RX

out

13

CLR

14TX

out

4

CLK

sel

15

U512FX/MX128

11 2 2CR537

3.58MHzR537

1MC53733PC538

47PC541150P

C535104P

R535100K

C539

120PR539

100K

R540100K

C540104P

C533470P

C534470P

R52722K

C527150P

C532470P

C542104P

R54147K

T525UMC4

R53010K

R53110K

D530

1N4148

D5311N4148

5V 5T

C501103P

C531103P

C2575P

FL25121.7MHz

FL25221.7MHz

C281102P

C2555P T102

DTA114EEC103470P

MIC MIC

C27120P

C27015P

CR27221.250MHz

R301

1K

R2021K

MIX IN

P-AMPMIC

SB

AFin

APC/TUNE

D3

MONI

PB5

PTT

SP

N/WVOX

P-AMPMIC

SB

AFin

APC/TUNE

D3

MONI

PB5

PTT

SP

N/W

P-AMPMIC

SB

AFin

APC/TUNE

D3

MONI

PB5

PTT

SP

SB

AP

C/T

UN

E

C279104P

O I

FL261450K

(T.Y.)

T401DTA114EE

C409470P

C410103P

5VOX5V

R408

1K

5CC

5CC

(T.Y.)

(T.Y.)

(T.Y.)

BEEP BEEP BEEP

BE

EP

E4014.7uF

C413103P

(T.Y.)

C412103P

T402DTA114EE

C411470P

R409

1K

R669

1K

in

Gndout

U9115A

C911103P

E91110uF

E91310uFC913

103P

C912471P

5M

BATTBATT

BATT

5M

C202470P

C301103P

9 10 11 12 13 14

A

B

C

D

R433

1K8

C6401uF

R646

0R

C181102P

E1814.7uF

nc 1Vcc 2nc 3Vin 4

Ripple 5NF6 Phase7 PreG8 PwG9 Pout10

U641TA7368

T6022SB624

T611DTC114EE

C612470P

R612

2K2

C601470P

R6132K2

C604104P

R60110K

C642104P

E6411uF

C602124P

R642150R C641

220P

R64410R

E64210uF

C643100P

C644104P

E651100uF

P-AMP

T1032SB624 R102

4K7R101

4K7C102104P

T201DTA114EE

C101104PC201

103P

R441

33K

C441

473P

R4431M8

R442

33K

C444104P

R44410K

C446470P

C445

473PC442

332P

C443680P

5T 5T

5T

MIC

5V5V

P-TX/RX

R171

0.39RR172

0.39RR173

0.39R

R198

150K

R195150K

R196150K

R197150K

R194

150K

R192

150K

R185

10K

R193NC

R184220K

R18347K

R186

NC

R182

1M

R181

10K

R18739K

R188

47K

R189

18K

C195471P

C198NC

C173103P

C192

101P

C191102P

C185470P

C186103P

C188104P

2

31

84

U161ALM2904V

76

5

U161BLM2904V

T191DTC114EE

T181DTC114EE

APC/TUNE APC/TUNE

BA

TT

5T

5T

C172105P

C171103P

R448

T4412SC4617

R446

33K

L402

101T

R401

470R

C402

104P

R4021K8

C403470P

R403100K

C404273P

R40418K

C407102P

R406750K

C406223P

R421820R

C422104P

E4212.2uF

R40522K

R43130K

C405102P

E4314.7uF

R432

1K5

R434

51K

C431

223PR4354K7

2

31

84

U411ALM4558

76

5

U411BLM4558

33

11

22

D4221SS372

T421MRF497

C438470P

R438100R

R4373K3

R4361K8

5T

C408102P

C401103P

T4312SK1824

C434

10P

C2143P

C215N.U.

C216470P

C217

0.3P

VC2206P

C2213P5

C222470P

C223

0.3P

VC2266P

C2274P5

C228470P

C231102P

C232102P

C233470P

C234

8P

C23710P

C238

0.5P

VC2416P

C2424P

C230470P

R214N.U.

R217100K

R220100K

R223

0R

R226220K

R227100K

R228220R

R2290R

R2303K3

R231100R

L2123T

L213

3T

L2143T

L2163T

L21939nH

L22018nH

L2233T

L2243T

D215N.U.

D214HVC350B

D217HVC350B

T2313SK229

R213

100K

C205102P

R212

0R

C212

15P

T4112SC4738

33 1 1

22

D411MA742C417

104PC415104P

R415100R

C416

470P

R414

270RC414

103P

R4135K6

5T

SW411A

RD91

R45010R

PX4401SCHEMATIC DIAGRAM

PX4401 Revision E01DDrawing By Lv Wei Jun Netec 0540

T102DTA114EE

C103470P

MIC MIC

R2021K

C901105P

L901101T

C902102P

C903103P

BATT

C904103P BAT111

BATTERY

SW711

ANKEY

SW712

PTT

SW713

ANKEY

R715

0R

R716

4K7

C711103P

C713102P

P-AMPMIC

SB

AFin

APC/TUNE

D3

MONI

PB5

PTT

SP

N/W

P-AMPMIC

SB

AFin

APC/TUNE

D3

MONI

PB5

PTT

SP

P-A

MP

SB

AP

C/T

UN

E

SP

AFi

n

B

(T. Y.)

SB

BATT

(T.Y.)

5VOX

(T.Y.)

(T.Y.)

BEEP BEEP

BEEP

BE

EP

BE

EP

E4014.7uF

C413103P

(T.Y.)

C412103P

DTA114EE

C411470P R669

1K

in

Gndout

U9115A

C911103P

E91110uF

C912471P

BATTBATT

BATT

654321

E

D

C

B

RV378100K

C378104P

32

54

1JK511

ST-301

C329

10P

R320

47R

C320

470P

R3251K

Vcc

11

Vp 1

2D

o R

F3

GN

D_D

4f i

n R

F5

f in

RF

6G

ND

_A7

OSC

in8

GN

D_D

9Fo

LD

10C

lock

11

Dat

a12

LE13

GN

D_A

14

f in

IF15

f in

IF16

GN

D_D

17

Do

IF18

Vp 2

19

Vcc

220

U311LMX2332

C318102P

R3121K

C386102P

C387102P

R388

33K

R389180R

C388104P

R3260R

C326102P

R368560R

C313101P

R367

560R

C314101P

R365

2K2

C315101P

R3666K8

R3644K7E367

0.1uF E3631uF

E3640.1uF

D312PMSD4148

XOUT 3

VC15C4

GND 2

CR311

14.4MHz

VR35150K

E3264.7uF

L361

101T

PR3111K

R363

0R

R362150R

E377

4.7uFR37722K

R37622K

C319104P

5C

5CC

P-T

X/R

X

PLL_CS

PC3N/W/LD

DQTo

PC

1P

C2

PC

3P

C4

E3194.7uF

C312NC

R311150KR313

NC

T3222SC3356

L32518nH

C327NC

C3282P

C325103P

C381

47P

R382220K

T3622SC4215

C38582P

R38110K

L382100nH

L363

100nH

C383560P

R383RES

+5R

C382390P

C384CAP

28.8MHZ

R361

0R

C317101P

C834101P

C835101P

C836101P

C837101P

C838101PC831

101PC832101P

C833101P

PR81147K

PR8121K

C853101P

C856392P

C850104P

C857105P

C852221P

C858221P

C855333F

E8544.7uF

R85358K

R85568K

R85482K

R852R-1

R8582K2

R857

22K

L851101T

D813RED

D814GREEN

T813DTC114EE

T814DTC114EE

R814560R

R8154K7

R813560R

C817104P

T815DTA114EE

R8174K7

R816

10K

C818104P

R818

4K7

A01A12

GND4 DA 5CK 6A23 WP 7Vcc 8U821

24C08C827103P

R82710K

PC0

R8348K2

C372103P

C371223P

R371

4K7

R3754K7

R374

1K2

R3732K7

R3724K7

PC

7P

B3

PB

4P

B5

CR881

32.768KHz C883104P

C886104P R885

15K

R88482K

R883100K

L886301T

C81127P

C88227P

T881

2SB624

R886

0R

C885103P

R7010R

C316102P

L326100nH

R38739K

R392120K

2SC3356

5C

R345100K

C331100P

R332100R

C324470P

R347

22R

C345470P

C344104P

R333

15K

C343470P

L331

180nH

D3321SV325

L332180nH

L33315nH

L33622nH

L3353.3uH

L347100nH

D331

1SV325

D3331SV278

C3322P

C333

27P

D321MA2S11

C335

11P

R3214K7

C3381P

C3394P

C321103P

C3405P

C3415P

C3421P

T3322SJ243

T352UMC4

C351100P

L351

270nH

D3521SV325

L329

101T

R331150R

C347102P

T3312SK508NV(K52)

T3212SC4617(S)

R32447K

C323470P

C322470P

R351180R

L352270nH

L35318nH

L3553.3uH

D351

1SV325

C3522P

C353

33P

C355

15P

C3595P

C3607P

C36110P

C3621P

T3512SK508NV(K52)

E32310uF

L324101T

R346

1K

MOD

5R

C27233P

C284104P

C285

221P

C286

221PC28710P

C288471P

C276

27P

C278104P

C275104P C274

104P

C280103P

E28310uF

R285180K

R2873K9

R286

180K

R2883K3

R27627K

R2741K2

R277100K

R283

100R

OSC

in1

Dec

6FI

L ou

t7

IF o

ut11

IF in

5

MIX

in16

AF o

ut9

RSS

I12

QU

AD10

MIX

out

3

OSC

out

2

FIL

in8

N-d

et13

N-r

ec14

Vcc

4

GN

D15

U261TA31136F

CR271C28

T275DTA114EE

C283104P

C282104P

R278

0R

C830102P

R833

150K

R831

150KR832150K

5V

PB1

RXi

ATX

QT

D0D1D2D3PC7PB3PB4

HT1621-CSGND_D

PC6

5VPB1

PB5

SB

PC4

C854103P

TX in

6N

.C.

7

RX

in11

V bi

as9

N.C

.10

Vss

8

C539

120PR539

100K

R540100K

C540104P

R52722K

C527150PC526

223PC525223P

C524104P

R528100K

R52922K

C528120P

R86610K

R86710K

R8643K3

R862

1K8

R865

20K

R863

100R

C867104P

C862332P

C863470P

T4612SK1824

C872C871

R873

4K7

R872

4K7R871 E871

in

Gnd out

U9065A

C907103P

E90710uF

E90510uF

C905103P

C906

471P

5V

D/A20ATX21ARX22

AD1

23AD

224

AD3

25O

SCI

26O

SCO

27Vs

s28

Res

et32

Vdd

33

PA0 34PA1 35PA2 36PA3 37PA4 38PA5 39PA6 40PA7 41PB0 42PB1 43PB2 44PC0

1PC

12

PC2

3PC

34

PC4

5PC

56

PC6

7PC

78

PB3

9PB

410

PB5

11

PD3

31PD

129

PD2

30

AVdd12RXO13RXI14TXI15TXO16Tone17

AVss19 LC18U811

U-EM44

R868

4K7

R861RES

R71710K

C864104P

C529104P

5V

5CCP-TX/RX

MOD28.8MHZ

R322100K

C281102P

GR

EE

NTX

D/R

ED

R379NC

R378

NC

N/W

/LD

C27120P

CR27221.250MHz

DEV MIX IN

SQL

CV

1

2

3

4

5

6

7

8

9

10

11

12

13

18

17

16

15

14

JP811

JP18

GND_D

R304100R

R713

100R

R714

100R

C304NC

5V5C 5C

R71810K

MIC+SP+

PTT/RXD

O I

FL261450KPC6

PB

1

D0D1D2D3K1K2K3K4

LCD CS

LAMP 2

LAMP 1

SB

SB

(T.Y.)

(T.Y.)

(T.Y.)

(T.Y.)

BE

EP

VOUT4 VDD 5GND3SDA1

RST 7GND 6OSC2 SCL 8

U511AUDIOR548

680RC548104P

C549104P

R5494K7

C547103P

C546

104P

R546330K

R54510K

R7020R

5M5MDQTo

C851104P

121110987

O I

FL25329.250MHZ

R433

1K8

L253

270nH

L391100nHC391

102P

L39347nH

L39222nH

C392

33P

C393

15P

C394471P

C395103P

C398102P

C397

P

C396102PR392

120K

R3963K3

R393100R

R3943K3

R3955K6

R397220R

T3922SC3356

R3993K3

T3912SC3356

R391680R

5C

C390NC

5V

C181102P

E1814.7uF

T1032SB624 R102

4K7R101

4K7C102104P

T201DTA114EE

C101104PC201

103P

R441

33K

C441

473P

R4431M8

R442

33K

C444104P

R44410K

C446470P

C445

473P

T301DTA114EE

C303470P

C302103P

C442

332P

C443680P

5C

5R

5T

5R

5T

5R5T

5T 5T

5C

5T

MIC

5V 5V5V

5CCP-TX/RX P-TX/RX

R256

18K

R171

0.39RR172

0.39RR173

0.39R

R198

150K

R195150K

R196150K

R197150K

R194

150K

R192

150K

R185

10K

R193NC

R184220K

R18347K

R186

NC

R182

1M

R181

10K

R18739K

R188

47K

R189

18K

C195471P

C198NC

C173103P

C192

101P

C191102P

C185470P

C186103P

C188104P

2

31

84

U161ALM2904V

76

5

U161BLM2904V

T191DTC114EE

T181DTC114EE

APC/TUNE APC/TUNE

BA

TT

BATT

5T

5T

C447820P

C172105P

C171103P

C451103P

C448

332PR449

10K

R4471M8

R448

33KR451

3K3

T4512SC4617

R45247K

T4412SC4617

R446

33K

E4512.2uF

R45322K

L133

22nH

D111

HSC277

T1312SK3078

T1112SC3356

T1412SK3476

C111

470P

C121470P

C112470P

C1157P

C1236P

C124104P

C13133P

C13327P

C134

102P

C136NC

C127470P

C146103PC143

103PC145104P

C141NC

R11115K

R113

33K

R12122R

R124

10R R1250R

R11422R

L123101T

L11218nH

L13115nH

L132101T

L1438T

L142101T

5TP_TXP_TX

C114470P

R115680R

R128120K C138

470P

C153NC

C135N.U.C125

470P

R1350R

C113103P

R153

0R

T1212SC4988

C122470P

C126N.U.

R123

150K

L12215nH R122

330RR12747K

R12622R

R13647R

R13747K

R13847K

C137470P

C15222P

C1511P

C144470P

C1421uF

C256103P

L402

101T

R401

470R

C402

104P

R4021K8

C403470P

R403100K

C404273P

R40418K

C407102P

R406750K

C406223P

R421820R

C422104P

E4212.2uF

R40522K

R43130K

C405102P

E4314.7uF

R432

1K5

R434

51K

C431

223PR4354K7

2

31

84

U411ALM4558

76

5

U411BLM4558

33

11

22

D4221SS372

T421MRF497

C438470P

R438100R

R4373K3

R4361K8

5T

C408102P

C401103P

T4312SK1824

C434

10P

C2143P

C215N.U.

C216470P

C217

0.3P

VC2206P

C2213P5

C222470P

C223

0.3P

VC2266P

C2274P5

C228470P

C231102P

C232102P

C233470P

C234

8P

C23710P

C238

0.5P

VC2416P

C2424P

C2526P

C230470P

R214N.U.

R217100K

R220100K

R223

0R

R226220K

R227100K

R228220R

R2290R

R2303K3

R231100R

L2123T

L213

3T

L2143T

L2163T

L21939nH

L22018nH

L2233T

L2243T

L23122nH

D215N.U.

D214HVC350B

D217HVC350B

D220HVC350B

T2313SK229

R213

100K

C205102P

R212

0R

C212

15P

C27233P

C254103P

C264104P

C284104P

R262

470RT261

2SC4215

R261

680K

R2642.7K

R2741K2

OSC

in1

Dec

IF o

ut

IF in

5

MIX

in16

RSS

I12

MIX

out

3

OSC

out

2

N-d

et13

N-r

ec14

Vcc

4

GN

D15

C273224P

C261103P

C2622P

C283104P

C282104P

R278

C243470P

C246

0.5P

C2474P

C250103P

R234100K

R237

0R

R2381KR239

220R L2273T

T2513SK229

L2520.56uH

C25115P

R2512.2K

R2421K

C206103P R252

1K

R254470R

C25315P

C26313P

C416 R414

R4135K6

R398

0R

5T

OSC

out

1

TX in

6N

.C.

7

RX

in11

TX A

out

5

Vdd

16

V bi

as9

RX

Aout

12

N.C

.10

N.C

.3

OSC

in2

Vss

8

RX

out

13

CLR

14TX

out

4

CLK

sel

15

U512FX/MX128

11 2 2CR537

3.58MHzR537

1MC537

C535104P

R535100K

C539

120PR539

100K

R540100K

C540104P

C533470P

C534470P

R52722K

C527150P

C532470P

T525UMC4

R53010K

R53110K

D530

1N4148

D5311N4148

5V 5T

C501103P

C531103P

C2575P

FL25121.7MHz

FL25221.7MHz

C281102P

C2555P

D213HSC277

T102DTA114EE

C103470P

C27120P

C27015P

CR27221.250MHz

R301

1K

R2021K

MIX IN

SB

AP

C/T

UN

E

C279104P

O I

FL261450K

C132N.U.

C128102P

C129N.U.

(T.Y.)

T401DTA114EE

C410103P

5VOX5V

R408

5CC

5CC

(T.Y.)

(T.Y.)

(T.Y.)

BE

EP

E4014.7uF

C413103P

(T.Y.)

C412103P

T402DTA114EE

R409

inG

ndout

U9115A

C911103P

E91110uF

E91310uFC913

103P

C912471P

5M

BATTBATT

BATT

5M

C202470P

C301103P

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B

C

D

E

14131211109

R433

1K8

R211

0R

C6401uF

R646

0R

C181102P

E1814.7uF

nc 1Vcc 2nc 3Vin 4

Ripple 5NF6 Phase7 PreG8 PwG9 Pout10

U641TA7368

T6022SB624

T611DTC114EE

C612470P

R612

2K2

C601470P

R6132K2

C604104P

R60110K

C642104P

E6411uF

C602124P

R642150R C641

220P

R64410R

E64210uF

C643100P

C644104P

E651100uF

P-AMP

T1032SB624 R102

4K7R101

4K7C102104P

T201DTA114EE

C101104PC201

103P

R441

33K

C441

473P

R4431M8

R442

33K

C444104P

R44410K

C446470P

C445

473PC442

332P

C443680P

5T

5T 5T

5T

MIC

5V5V

P-TX/RX

R171

0.39RR172

0.39RR173

0.39R

R198

150K

R195150K

R196150K

R197150K

R194

150K

R192

150K

R185

10K

R193NC

R184220K

R18347K

R186

NC

R182

1M

R181

10K

R18739K

R188

47K

R189

18K

C195471P

C198NC

C173103P

C192

101P

C191102P

C185470P

C186103P

C188104P

2

31

84

U161ALM2904V

76

5

U161BLM2904V

T191DTC114EE

T181DTC114EE

APC/TUNE APC/TUNE

BA

TT

BATT

5T

5T

D211HSC277

C2112P

C172105P

C171103P

R448

T4412SC4617

R446

33K

D212HSC277

L133

22nH

ANT111ANT

L1641uH

T1312SK3078

T1112SC3356

T1412SK3476

C121470P

C112470P

C1157P

C1236P

C124104P

C13133P

C13327P

C134

102P

C136NC

C127470P

C146103PC143

103PC145104P

C141NC

R113

33K

R12122R

R124

10R R1250R

R11422R

L123101T

L11218nH

L13115nH

L132101T

L1438T

L142101T

L157220nH

L161

4T

L162

4T

L163

3T

L2114T

R157270R

R158270R

C15415P

C1557P

C156

27P

C157470P

C1613P

C162

470P

C163

10P

C164

9P

C165

10P

D156

HVU131

C1662P

C1675P

C1683P

C1691.5P

5TP_TXP_TX

C114470P

R115680R

R128120K C138

470P

C153NC

C135N.U.C125

470P

R1350R

C158NC

R153

0R

T1212SC4988

C122470P

C126N.U.

R123

150K

L12215nH R122

330RR12747K

R12622R

R13647R

R13747K

R13847K

C137470P

C15222P

C1511P

C144470P

C1421uF

L402

101T

R401

470R

C402

104P

R4021K8

C403470P

R403100K

C404273P

R40418K

C407102P

R406750K

C406223P

R421820R

C422104P

E4212.2uF

R40522K

R43130K

C405102P

E4314.7uF

R432

1K5

R434

51K

C431

223PR4354K7

2

31

84

U411ALM4558

76

5

U411BLM4558

33

11

22

D4221SS372

T421MRF497

C438470P

R438100R

R4373K3

R4361K8

5T

C408102P

C401103P

T4312SK1824

C434

10P

C2143P

C215N.U.

C216470P

C217

0.3P

VC2206P

C2213P5

C222470P

C223

0.3P

VC2266P

C2274P5

C228470P

C231102P

C232102P

C233470P

C234

8P

C23710P

C238

0.5P

VC2416P

C2424P

C230470P

R214N.U.

R217100K

R220100K

R223

0R

R226220K

R227100K

R228220R

R2290R

R2303K3

R231100R

L2123T

L213

3T

L2143T

L2163T

L21939nH

L22018nH

L2233T

L2243T

D215N.U.

D214HVC350B

D217HVC350B

T2313SK229

R213

100K

C205102P

R212

0R

C212

15P

C416 R414

R4135K6

5T

SW411A

RD91

R45010R

PX4401

T102DTA114EE

C103470PR202

1K

C901105P

L901101T

C902102P

C903103P

BATT

C904103P BAT111

BATTERY

SW711

ANKEY

SW712

PTT

SW713

ANKEY

R715

0R

R716

4K7

C711103P

C713102P

P-A

MP

SB

AP

C/T

UN

E

SP

AFi

n

C132N.U.

C128102P

C129N.U.

B

(T. Y.)

SB

BATT

(T.Y.)

5VOX

(T.Y.)

(T.Y.)

BEEP

BE

EP

BE

EP

E4014.7uF

C413103P

(T.Y.)

C412103P

DTA114EE

in

Gndout

U9115A

C911103P

E91110uF

C912471P

BATTBATT

BATT