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.
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
PDF created with pdfFactory Pro trial version www.pdffactory.com
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
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