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Philips 27VM34 U Service Manual
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Philips 27VM34 U Service Manual

Philips 27VM34 U Service Manual

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Colour Television
Contents
5. Faultfinding and Test point Overview with Waveform Diagram
6. Block Diagram, I2C And Supply Voltage Diagram
7. Electrical Diagrams and PWB's
9. Circuit Description, IC pins description
10. Spare Parts List
© Copyright 2001 Philips Consumer Electronics B.V. Eindhoven, The
Netherlands. All rights reserved. No part of this publication may be reproduced,
stored in retrieval system or transmitted, in any form or by any means, electronic,
mechanical, photocopying, or otherwise without the prior permission of Philips.
Published by RB 0166 Service PaCE
Line Deflection (Diagram A2)
Frame Deflection (Diagram A3)
Tuner IF (Diagram A4)
Video IF and Sound IF (Diagram A5)
Micro controller (Diagram A6)
Audio/Video Source Switching (Diagram A7)
CRT Panel (Diagram B)
Side AV (Diagram E)
List of Abbreviations
Printed in Netherlands
Subject to modification
1--60
Chassis
27VM34 U
Page
2 - 3
4 - 5
6 - 22
23
24 - 32
33 - 34
Diagram
PWB
35
35
36
36
37
38
39
40
40
41
41
42
42
43 - 46
47 - 50
51 - 58
59 - 60

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  • Page 1: Table Of Contents

    Netherlands. All rights reserved. No part of this publication may be reproduced, stored in retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, or otherwise without the prior permission of Philips. Published by RB 0166 Service PaCE...

  • Page 2: Technical Specifications, Connections And Chassis Overview

    1. Technical Specifications, Connections and Chassis Overview Index: 1. Technical Specifications. 2. Connections. 3. Chassis Overview. 1.1 Technical Specifications 1.1.1 Reception Tuning system: PLL Color systems: NTSC-M Sound systems: FM-mono & FM-stereo A/V connections: NTSC 3.58 Channel selections: TV: 2-69,CATV: 2-13,A-W, Aerial input: 75 OHM, 1VP-P 1.1.2 Miscellaneous Audio output: ≥6W+6W...
  • Page 3 1.2.2 Rear Connections Monitor Out 1 - Video CVBS (1 Vpp / 75 _) __ 2 - Audio L (0.5 Vrms / 1 k_) __ 3 - Audio R (0.5 Vrms / 1 k_) __ AV2 In 4 - Video CVBS (1 Vpp / 75 _) __ 5 - Audio L (0.5 Vrms / 10 k_) __ 6 - Audio R (0.5 Vrms / 10 k_) __ 1 - Video CVBS (1 Vpp / 75 _) __...

  • Page 4: Safety & Maintenance Instructions, Warnings And Notes

    2. Safety & Maintenance Instructions, Warnings, and Notes 2.1 Safety Instructions For Repairs Safety regulations require that during a repair: • Due to the ‘hot’ parts of this chassis, the set must be connected to the AC power via an isolation transformer. •...
  • Page 5 2.3 Warnings • In order to prevent damage to ICs and transistors, avoid all high voltage flashovers. In order to prevent damage to the picture tube, use the method shown in Fig. 2-1, to discharge the picture tube. Use a high voltage probe and a multi-meter (position VDC).

  • Page 6: Directions For Use

    3. Directions for Use Antenna Connection • Connect the aerial plug to the antenna socket ¬on the back cover. • Insert the mains plug into the wall socket. Mains Connection• For correct mains voltage, refer to type sticker at the rear of the TV set •...
  • Page 7 USING THE LANGUANGE CONTROL 7--60...
  • Page 8 SETING THE TV/CABLE TV CONTROL 8--60...
  • Page 9 USING THE AUTO MEMORY CONTROL 9--60...
  • Page 10 USING THE MAUNAL TUNE CONTROL 10--60...
  • Page 11 HOW TO ADD/ERASL CHANNELS 11--60...
  • Page 12 HOW TO ADJUST TV PICTURE 12--60...
  • Page 13 SMART PICTURE CONTROL 13--60...
  • Page 14 SMART PICTURE CONTROL 14--60...
  • Page 15 SETTING THE CLOCK FEATUREE 15--60...
  • Page 16 SETTING THE ON TIMER CONTROL 16--60...
  • Page 17 SETTING THE OFF TIME CONTROL 17--60...
  • Page 18 SETTING THE TV FOR CLOSED CAPTION 18--60...
  • Page 19 USING THE SMART SOUND CONTROL 19--60...
  • Page 20 USING THE SLEEP TIMER CONTROL 20--60...
  • Page 21 USING THE FIVE EQUALIZER BAND CONTROL 21--60...

  • Page 22: Mechanical Instructions

    USING THE BALANCE AND DBE CONTROL 4. Mechanical Instructions 22--60...
  • Page 23 Index: 1. Rear Cover Removal 2. Serv e Position Main Panel 3. Side I/O Panel Removal 4. Rear Cover Mounting Note: Figures can deviate slightly from the actual situation,due to different set executions. 4.1 Rear Cover Removal 1. Remove all fixation screws of the rear cover. 2.
  • Page 24 5.1 Faul tfinding Figure 1 Fuse Blown Fuse Blown Is DB801 OK? Replace DB801 Is it IC801 PIN3 shorted to earth? Cheek / Replace IC801 Check the components such as C812, C813, etc. Figure2 No Raster Abnormal +B Ok No raster abnormal + B Voltage Check IC 802, IC...
  • Page 25 No raster abnormal + B Voltage Is the + B, +26V, +12V, +12VA Check IC802, IC831 and Check Q830 Q831, resistance to earth ok? their peripheral D840 etc. components Check IC801 and their Check/Replace the load of the peripheral components abnormal br anch Check D803 D804 T802...
  • Page 26 Symptom: rast ok, no Check & Repair Q251, Z252 picture, no sound, sparse and their peripheral noise do Are there illati on waves at P50 and P51 of Replace Apply the pointer mul i TB1240N? TB12 eter at R X 1 KΩ, connect Is T271 one probe to GND, use er to touch TB1240N...
  • Page 27 Figur e 6 No Sound No sound Is the speaker ok? Replace the speaker Replace pply the pointer of mult i meter at IC601 X1KΩ connect one probe to GND, ck power use another to touch the j unct Is it mute at ply of IC601 oint of C404 R602 C604, R6 01, Is...
  • Page 28 Check Check +9V, Check R516 ~ R521 TV&AV Q501~Q502 +200V etc. haven’t Picture Check RGB Check P39 of Check P17 of Replace signal IC201 IC201 and IC201 related circuit TV has Check Q901 Q903 etc. Check Pin13 Picture. And Video alleyway C901 AV hasn’t Circuit...
  • Page 29 Figure 8 No Vertical Scanning Check Vcc (28V) at C432 ( + ) Chec k signal at Pin 4 of Check/Rep lace IC301 D431 , R303 Check/Replace IC301 Check signal at pin 24 of IC201 Check/Replace R301, Check/Replace R229 etc. C223~C225 Check su pply voltage...

  • Page 30: Power Supply (Diagram A1)

    Check Q004 Q007 Symptom: Check the power and the related uning Control supply of IC001. circuit not work Are there H & V flyback pul ses at Is th ere th e OSD Is there the OSD P26 & P27 of IC001 pulse at pulse output at Press...
  • Page 31 heck th e remote control ① Is there any change on eceiver and transmitter the level of IC001 Is the VDD (+ voltage at th e P42 of Check IC001 ok? Q008 etc. s there t he 16MHz/5Vp-p Are C022, C023 sine wave oscillations at pin and L002 ok? 31 of IC001?
  • Page 32 6 Block Diagrams 32--60...
  • Page 33 33--60...

  • Page 34: Audio Processor (Diagram A8)

    hassis Overview A2 Line Deflection A3 Frame Deflection A4 Tuner IF A5 Video & Sound IF A6 Micro controller A7 Video & Audio source switching A9 Audio Power Amplifier B CRT Amplifier E Side AV panel AV/TV SWITCHING AUDIO PROCESSOR AUDIO AMPLIFIER 34--60...
  • Page 35 7. Electrical Diagrams and PWB’s A1 Power Supply A2 Line Deflection WF16 WF15 WF12 35--60 WF14 WF13...
  • Page 36 A3 Frame Deflection WF10 WF11 A4 Tune r IF 36--60...
  • Page 37 A5 Video & Sound IF 37--60...
  • Page 38 A6 Micro controller A7 Video & Audio source switching 38--60...
  • Page 39 39--60...
  • Page 40 A8 Audio Processor A9 Audio Power Amplifier 40--60...
  • Page 41 B CRT Amplifier 41--60...

  • Page 42: Layout Main Carrier (Part 1 To Part 4)

    E Side AV Panel Layout Main Carrier(Part 1) 42--60...
  • Page 43 ayout Main Carrier(Part 1) 43--60...
  • Page 44 Layout Main Carrier(Part 2) 44--60...
  • Page 45 Layout Main Carrier(Part 3) ayout Main Carrier(Part 4) 45--60...

  • Page 46: Alignments

    . Alignment hassis alignment instruction 46--60...
  • Page 47 Enter factory mode in production line imply press the D-mode key on the factory remote handset. Enter service mode Press and hold the VOLUME DOWN key tightly on the unit until minimum level and don’t release the VOLUMN DOWN key, then press the “0” key on the remote handset three times. “D”...
  • Page 48 Vertical VPOS60 (00) Input a NTSC cross Adjust VPOS60 for vertical position. geometry for HIGH60 (21) hatch pattern. Adjust HIGH60 for vertical amplitude. NTSC system VLIN60 (05) Adjust VLIN60 for vertical linearity. (Key 3) VSC60 (08) Adjust VSC60 for vertical S-correction OSD60 (2B) Adjust OSD60 for OSD position (normally use default value).
  • Page 49 ite balan R CUT (80) Black and white 1. Measure the dark side of the picture wi th a color adjustment G CUT (80) pattern (PAL) analyzer and set RCUT to 80. Then ad just BCUT (key 1) B CUT (80) and GCUT until the data on the analyz er become x G DRV (40)
  • Page 50 SELF ADJ (00) INTRO ---------- SELF ADJ– auto detection option ELF VCO (80 F VCO – auto detection of VCO CD OSD (42) OSD – adjust horizontal location for CCD CD OSDF (63 displ OL OUT (73) CCD OSDF – oscillating frequency setting for CCD displ OUT –...
  • Page 51 9 B ck Diag In the TV body TDA2822 BTSC TDA2616Q TUNER (MSP3440) S Vi TDA2616Q AV1 IN C BUS WOOFE 4052 PIF&SI COMB.F(TDA9181) CVBS/YC PAL/NT SC 1 CHIP EEPROM OSD RGB MICRO COMPUTER 1240 TMP88CS38N RECEIVER HOUT Body VERT STRF6656 REMOTE C ONTROL...
  • Page 52 9.1 IC pin Description POWER SUPPLY SFA-6656 52--60...
  • Page 53 FRAME IC TA8427K TA8427K is a power amplifier for driving a deflection circuit of a large and medium screen size color television. TA8427K is available for construction a stable deflection circuit with small number parts in an application with a single chip signal processing IC TA8879N. 53--60...
  • Page 54 MICROPRO CESSOT IC TMP88PS3 pin 42: Power supply, +5VDC. pin 20: Standby control. pin 41: Video signal input, used by pin 19: Mute control. CCD, V-chip decoder. pin 18: X-RAY control output. when pin 40: Video synchronous signal input, the high voltage exceeds protective used by CCD,V-chip decoder.
  • Page 55 EEPROM M24C04 Two Wire I2C Serial Interface Supports 400 kHz Protocol Hardware Write Control BYTE and PAGE WRITE (up to 16 Bytes) RANDOM and SEQUENTIAL READ Modes Self-Timed Programming Cycle Automatic Address Incrementing Enhanced ESD/Latch-Up Behavior 1 Million Erase/Write Cycles (minimum) AV/TV AND AV1/AV2 SWITCH IC 4052 Pin No Fu nction...
  • Page 56 PROCESSOR IC TB1240 Pin 1 is the AFT output to the CPU. he VCD H-sync is presen t, the horizontal drive (IC201) will detect the frequency drift of the transformer (T401 ) and the flyback (T461) IF signal and then feed back to the CPU. The will oscillate and the whole TV set will turn DC voltage at this pin should be 2.5V if the IF...
  • Page 57 Audio Power Amplifier TDA2616Q Pin No Pin Name Function Function -INV1 Non-inverting in put 1 Mute Mute input 1/2Vp /GND 1/2 supply voltage or ground Out 1 Output 1 Supply voltage (negative) Out 2 Output 2 Supply voltage INV 1,2 Inverti ng voltage (positive) -INV 2...
  • Page 58 Audio Processor MSP3440 Pin1 is used to test.This pin enables factory test Pin21 and pin22 is used for headphone out ,right modes. and left. Pin2 is used for audio cl ock o Pin24 and pin25 is used for loudspeaker Pin3 and pi n4 i s used for D_CTR_...
  • Page 59 .2 abbreviation list 2 Carrier (or Channel) Stereo Automatic Channel Installation: al gorithm that insta lls TV sets directly from cable network by means of a predefine XT page Analogue to Digital Converter Automatic Frequency ontrol: contr ol signal used to tune to the correct frequency Automatic Fine Tunin Automatic Gain Cont...
  • Page 60 Loudspeaker Multi-standard Sound Processor: Mute-Line Not Connected National Television Standard Committee. Colour system mainly used in North America and Japan. Colour carrier NTSC M/N = 3.579545 MHz, NTSC 4.43 = 4.433619 MHz (this is a VCR norm, it is not transmitted off-air) Non Volatile Memory: IC containing TV related data e.g.

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