Puxing PX-777 Service Manual
Uhf/vhf fm transceiver
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Also See for PX-777:
- Service manual (30 pages) ,
- User manual (16 pages) ,
- Operation manual (3 pages)
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Table of Contents
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
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Table of Contents
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Summary of Contents for Puxing PX-777
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Page 1: Table Of Contents
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... -
Page 2: Introduction
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. -
Page 3: Realignment
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. - Page 4 2. LCD DISPLAY...
- Page 5 3. SELF-PROGRAMMING MODE For frequency,signal,feature write to the radio...
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Page 7: Technical Specification
TECHNICAL SPECIFICATION General 136 ― 174MHz ， 350 — 390MHz ， 400 — Frequency Range 470MHz,245Mhz －20℃―＋50℃ Working Temperate 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... -
Page 16: Semiconductor Data
CPU PIN FUNCTION PX-777 ITEM DESCRIPTION FUNCTION CLK ROM I/O CLOCK AND EEPROM O Key scan output O Key scan output O PLL clock port/Key scan output O PLL data port/Key scan output PLL CS O PLL CS port LAMP2... -
Page 17: Parts List
PX777 part list(136-174MHz) Designators Footprint Comment Quantity 电容类 备注 C0402 0.5P C332 C349 C0402 C231 C0402 1.5P C346 C423 C456 C315 C317_2 C313_2 C175 C0402 100P C535 C536 C537 C538 C315_2 C314_2 C416 C415 C593 C387_1 C318_1 C316_2 C312_2 C326_1 C227 C121 C132 C135... - Page 18 C0402 C126 C343 C0402 C226 C232 C262 C258 C546 C666 C311 C221 C112 C111 C127 C125 C141 C233 C177 C317 C243 C314 C355 C312 C0402 470P C356 C358 C313 C204 C310 C412 C622 C632 C531 C534 C533 C180 C260 C532 C173 C667 C0402...
- Page 19 R0402 180K R265 R263 R0402 R414 R187 R573 R591 R593 R251 R254 R411 R0402 R666 R312_2 R313 R667 R668 R417 R596 R393 R0402 R421 R124 R0402 R664_1 R183 R0402 R428 R433 R0402 2.2K R261 R0402 2.7K R259 R0402 220K R252 R551 R181 R512...
- Page 20 R1206 0.39 R104 R105 R106 L0603电感 L411 L511 L111 L122 100NH C697 高频叠层 L0603 100NH L326_1 L313 L315 L0603 101T L521 瓷珠 L0603 L391 L0603 220NH R807 L354 L351 L348 L242 高频叠层 L0603 33NH L143 高频叠层 L0603 47nH L352 高频叠层 L0603 560UH L392...
- Page 21 T_SOT89 2SK3078 T131 T_SOT89 U631 U621 T_TSM 2SK508NV T331 T341 T_USM 2SC4215 T251 T393 2SC4226 T_USM 2SC4226-R25 T361 T352 T351 2SC4226 T_USM DTC114EE T181 T171 T_TSM 2SB624 T452 T544 T101 T521 T301 2SK3276 2SK3476 T141 T_USM 1SS372 D411 T521 T301 T_USM 2SC3356 T111...
- Page 25 102P C313 C314 C315 PR311 101P 101P 101P L329 R333 L347 C347 R368 R362 101T 100nH 102P C362 560R 150R C360 L351 L361 D351 C353 C355 R367 R365 R363 R361 270nH C906 560R 101T L352 1SV325 L355 T351 28.8MHZ 270nH 3.3uH R366 R364...
- Page 26 DTA114EE C181 E181 C173 R171 4.7uF 102P (T.Y.) 103P C171 C172 C302 C301 T201 105P 103P 0.39R 103P 103P R256 DTA114EE R195 R172 150K R301 U161A C195 T103 C256 C101 U161B C185 C201 LM2904V 0.39R R102 2SB624 470P 471P 103P 104P LM2904V R185...
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Page 27: Schematic Diagram
C181 E181 C173 R171 4.7uF 102P (T.Y.) 103P C171 C172 T201 105P 103P 0.39R C602 DTA114EE R195 R172 150K 124P U161A C195 T103 C101 U161B C185 T602 C201 LM2904V 0.39R R102 2SB624 470P 471P 104P LM2904V R185 2SB624 103P R181 R198 R173 R101... - Page 28 C329 E319 C325 C319 CR311 4.7uF 103P T321 R325 R389 C388 C387 104P 2SC4617(S) (T.Y.) T352 X OUT L326 R383 180R VR351 104P 102P 100nH UMC4 L324 L363 C318 R321 C321 D321 14.4MHz 101T C322 C327 C328 102P L325 T332 R388 MA2S11 R346...
- Page 29 P_TX P_TX C144 L142 C395 C394 R138 470P C128 C113 C114 R128 103P 101T C142 471P L132 L123 102P C138 R114 120K 103P 470P 101T 470P 101T C132 R393 N.U. R391 100R R137 R136 C146 R111 L131 C143 L143 C145 C131 C137 C122...
- Page 30 P_TX P_TX C144 L142 R138 470P C128 C114 R128 101T C142 L132 L123 102P C138 R114 120K 470P R158 R157 101T 470P 101T C132 270R 270R N.U. R137 R136 C146 L131 C143 L143 C145 C131 C137 C122 L122 103P L161 L162 L163 103P...
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добрый день а рация программируется на любую частоту которая в инструкции 67-470мгц или различие есть