1. Manuals
  2. Brands
  3. Philips Manuals
  4. TV
  5. L9.2EAA
  6. Service manual

Philips L9.2EAA Service Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual

Colour Television


Copyright reserved 1999 Philips Consumer Electronics B.V. Eindhoven, The
Netherlands. All rights reserved. No part of this publication may be reproduced,
stored in a retrieval system or transmitted, in any form or by any means, electronic,
mechanical, photocopying, or otherwise without the prior permission of Philips.
Published by JvR 9965 Service Department

Contents

2. Safety- and maintenance instructions,
Warnings and notes.
3. Directions for use
5. Faultfinding and repair tips
6. Faultfinding trees
Blockdiagram
Testpointsoverview and oscillograms
7. Electrical diagram's en PWB's
Diversaty table A1
Vertical deflection
Tuner en video IF (TDA 8844)
Tuner en video IF (TDA 8845)
Diversaty table A5
Video processing
Smart sound & mono amplifier
Front cinch and headphone
Rear IO Scart
ITT Audio decodering
Side Av panel
10. Spareparts list
Printed in the Netherlands
Page
2
3
4
5
8
8
15
19
20
21
Diagram PWB
(Diagram A1)
22
31,32
23
(Diagram A2)
24
31,32
(Diagram A3)
25
31,32
(Diagram A4)
25
31,32
(Diagram A5)
26
31,32
(Diagram A5)
27
31,32
28
(Diagram A8)
28
31,32
(Diagram A6)
29
31,32
(Diagram A7)
30
31,32
(Diagram A9)
33
31,32
(Diagram A10) 34
31,32
(Diagram A11) 35
31,32
(Diagram A13) 36
31,32
(Diagram B)
37
38
(Diagram D1)
39
38
(Diagram D2)
40
38
(Diagram E)
41
41
43
47
52
55
Subject to modification
1
Chassis
L9.2E
AA
CL 96532028_front.eps
190499
#
4822 727 21684

Advertisement

Table of Contents
loading

Related Manuals for Philips L9.2EAA

Summary of Contents for Philips L9.2EAA

  • Page 1: Colour Television

    Netherlands. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, or otherwise without the prior permission of Philips. Published by JvR 9965 Service Department...

  • Page 2: Technical Specifications

    GB 2 L9.2E Technical Specifications 1. Technical Specifications Specifications Off air : 100dBV On air : 90dBV Audio output Mains voltage : 150V - 276Vac; • Stereo : 2 * 3W; 2 * 1W Mains frequency : 50 - 60Hz •...
  • Page 3 Safety instructions, maintenance instruction, warnings and Notes L9.2E GB 3 20- CVBS (1Vpp/75) L - Audio L (red) (0.2-2Vrms 10kΩ) 21- Earth screen R - Audio R (white) (0.2-2Vrms 10kΩ) 1.2.3 Cinch - audio/video in 1.2.4 Headphone V - CVBS (yellow) (1Vpp/75)) - 8-600Ω...
  • Page 4 GB 4 L9.2E Safety instructions, maintenance instruction, warnings and Notes or the aerial connection on the set. The reading Where necessary, the oscillograms and direct voltages are should be between 4.5 MΩ and 12 MΩ measured with ( ) and without aerial signal ( ).

  • Page 8: Mechanical Instructions

    GB 8 L9.2E Mechanical instructions 4. Mechanical instructions Service positions The mono-carrier is removed by pushing the two centre clips at both chassis brackets outwards and pulling the panel forward. See figure 4.2 for the service position. Disconnect the connecting cable feeding the right-hand and the left-hand speaker, also disconnect the degaussing cable.
  • Page 9 Service Modes, fault finding and repair tips L9.2E GB 9 5.2.2 Diagnose features for service In the SDM the following information is displayed on the screen: L9 sets can be put in two service modes via the RC7150. These are the Service Default Mode (SDM) and the Service Alignment LLLL L90BBC X.Y Mode (SAM).
  • Page 10 GB 10 L9.2E Service Modes, fault finding and repair tips • By shorting pin 0225 and 0226 on the mono-carrier ( A7 ) Pressing the "MENU" key again will return to the last SAM while switching on the set. After switching on the set the status.
  • Page 11 Service Modes, fault finding and repair tips L9.2E GB 11 The menus and submenus Error code buffer and error codes 5.3.1 Tuner sub menu 5.4.1 Error code buffer The tuner sub menu contains the following items: The error code buffer contains all errors detected since the last •...

  • Page 12: Trouble Shooting Tips

    GB 12 L9.2E Service Modes, fault finding and repair tips Bimos start-up register is corrupted or the I2C line to the • The driver circuit around transistor 7400 is faulty Bimos is always low or no supply at pin 12 of the Bimos). •...
  • Page 13 ComPair will enable you to find most problems in a fast and effective way. 5.7.1 Introduction Compair (Computer Aided Repair) is a service tool for Philips Additional features Consumer Electronics products. ComPair is a further Beside fault finding, ComPair provides some additional...
  • Page 14 GB 14 L9.2E Service Modes, fault finding and repair tips Connect the RS232 interface cable to a free serial The set has now started up in ComPair mode. Follow the (COMM) port on the PC and the ComPair interface PC instruction in the L9.2E fault finding tree to diagnose the set.
  • Page 15 Faultfinding trees, blockdiagram, supply diagram and testpoints. L9.2E GB 15 6. Faultfinding trees, blockdiagram, supply diagram and testpoints. START Remark : In normal operation the Connect a pattern generator to the arial input. Red LED lights in half Set Patt.gen. to 475,25 MHz, colourbar, stereosound, intensity and in PAL B/G (for France SECAM l).
  • Page 16 Faultfinding trees, blockdiagram, supply diagram and testpoints. L9.2E GB 16 Ensure communication with the RC, Check/Replace No picture Picture OK (A8);IC7680 (Colour missing) Menu OK NO Picture Deflection not OK Put the set into the No Menu NO Sound NO Sound Pictures are not Service Default Mode Black screen...
  • Page 17 Faultfinding trees, blockdiagram, supply diagram and testpoints. L9.2E GB 17 Horizontal section Vertical section Picture unstable horizontally. Vertical picture is too small or unstable Picture width too small. No sync. E/W not ok (A4);<S3>,<S4> Check / Replace (A4); IC7250 (A4) ; <S2>, Check / Replace (A4);IC7250 Check / Replace...
  • Page 18 Faultfinding trees, blockdiagram, supply diagram and testpoints. L9.2E GB 18 ERR 4 ERR 1, ERR 5 ERR 8 ERR 2 ERR 7 ERR 10 and/or 3, 12 or 6 +5 V Protection High beamcurrent , General I C error. BIMOS error. uP Internal RAM Check ERROR 1...
  • Page 19 Faultfinding trees, blockdiagram, supply diagram and testpoints. L9.2E GB 19 SUPPLY VOLTAGE DIAGRAM TUNER + VIDEO IF POWER SUPPLY HORIZONTAL DEFLECTION 3002 3003 TO (9-1000) 2008 TUNER 6007 5545 5445 -/C33 MAIN 6550 5550 SUPPLY 95V 5551 BATT (MAIN SUPPLY 95V) ANODE CRT FOCUS FOCUS...
  • Page 20 Faultfinding trees, blockdiagram, supply diagram and testpoints. L9.2E GB 20 7601 ST REAR I/O SCART AM MONO DEMODULATOR SMART SOUND + MONO AMPLIFIER FRONT CINCH + FRONT CONTROL (FOR BG/I/LL'ONLY) 7600 (ONLY MONO SETS) CONTROL HEADPHONE SAA 5565 SCART 1 EXT AUDIO 7953 TDA 7052B (2,3,4 W) EEPROM...
  • Page 21 Faultfinding trees, blockdiagram, supply diagram and testpoints. L9.2E GB 21 MAIN PANEL COMPONENT VIEW 0232 7680 7600 50V / div DC 100V / div DC 1V / div DC 0.5V / div AC 1V / div DC 5ms / div 20µs / div 20µs / div 20µs / div...
  • Page 22 Schematics and PWB’s L9.2E GB 22 7. Schematics and PWB’s F01 F9 6503 B5 0211 C2 6504 B5 0211A C2 6505 B6 0211B C2 6507 B6 POWER SUPPLY 0212 A2 6508 C6 0213 D2 6510 D4 0231 B2 6520 D6 0241 D11 6521 D6 VlotAux13V...
  • Page 23 Schematics and PWB’s L9.2E GB 23 DIVERSITY LIST FOR A1 ITEM FR20/21 HR20/21 LR20/21 LR14 HR14 HR20/21 HR14 FR20/21 FR14 FR20/21 FR14 FR14 FR20 LR14 HR21 FR14 AP/LA INDIA INDIA INDO INDO US(no relay) CHINA AP/LA 5500 2820F 2820F 2820F 2820F 2820F 2820F...
  • Page 24 Schematics and PWB’s L9.2E GB 24 0220 F7 9404 E10 0221 B6 9408 C6 0221A A6 9424 B5 0221B A6 9425 B4 LINE DEFLECTION 0221C A6 1400 D10 2400 D4 2401 D4 2402 E4 2403 E5 2404 B5 0221A 2405 D5 2406 E4 FISH HOOKS 3416...
  • Page 25 Schematics and PWB’s L9.2E GB 25 0222 C5 2231 C3 0222A C5 2232 C4 0222B C5 2233 C2 2460 C2 2234 C3 FRAME DEFLECTION 2461 C2 2235 D5 SYNCHRONISATION 2462 C2 2236 C5 2463 B3 2237 D2 TDA 8844, 8845 2464 B4 2238 E2 2465 D3...
  • Page 26 Schematics and PWB’s L9.2E GB 26 F02 C3 9000 B6 0239 A11 9203 G6 0240 A9 9204 E4 1000 B2 9205 G7 1001 A7 9220 G7 TUNER, VIDEO IF, VIDEO DET, FM-AUDIO DET. 1002 B7 9279 A7 1003 E4 TDA8844 1005 G4 0240 0239...
  • Page 27 Schematics and PWB’s L9.2E GB 27 F02 C3 0239 A12 0240 A10 1000 B2 1003 E4 TUNER VIDEO IF, VIDEO DET, QSS-AUDIO DET. 1010 D2 1011 C2 TDA8845 1012 C2 0240 0239 1200 E9 A5-24 A5-46 1201 E9 1204 G4 AudioSupply10V|14VA AudioSupply10V|14V A5-25...
  • Page 28 Schematics and PWB’s L9.2E GB 28 0259 E3 DIVERSITY TABLE FOR A5 1680 B5 1681 B5 1682 B4 TUNER VIDEO IF (Europe) TUNER SOUND IF (Europe) FRONT CONTROL 1683 B4 1684 B3 Mono Stereo LL’ST LL’MN B/G, D/K SW 2680 E4 2697 B4 BG/DK BG/I/LL’...
  • Page 29 Schematics and PWB’s L9.2E GB 29 0243 B12 1205 D4 1208 D5 2210 C2 2211 C2 VIDEO PROCESSING (EUROPE) 2212 B4 2213 B4 TDA 8844, 8845 2214 D2 2215 D3 2216 D3 2217 D4 2218 E12 2221 D6 2222 D5 A7-24 2223 D8 A7-25...
  • Page 30 Schematics and PWB’s L9.2E GB 30 0219 A12 3645 B8 0224 A10 3646 B8 0225 F3 3647 G8 0226 F3 3648 F8 0228 A10 3649 F8 CONTROL 0236 D12 3650 E2 5603 +5VD 0237 E12 3651 F2 3V3A 0238 C12 3652 E2 7601 0256 F12...
  • Page 31 Schematics and PWB’s L9.2E GB 31...
  • Page 32 Schematics and PWB’s L9.2E GB 32...
  • Page 33 Schematics and PWB’s L9.2E GB 33 1701 D4 2702 E5 2703 E6 AM MONO DEMODULATOR 2704 E7 2705 F7 2706 E7 (for BG/I/LL’ Mono sets only) 2707 E9 2709 C7 2710 C7 3707 E8 3709 F7 3710 F8 3712 E9 3713 E9 4220 E8 7703 E8...
  • Page 34 Schematics and PWB’s L9.2E GB 34 0215 C10 0215A B11 0215B B11 0264 D4 2950 E5 SMART SOUND + MONO SOUND AMPLIFIER 2951 E7 2952 C7 2953 B6 2954 B8 2955 E3 2956 D7 2957 D9 2958 C10 2959 C10 2971 B4 2972 B5 VlotAux8V...
  • Page 35 Schematics and PWB’s L9.2E GB 35 0217 E6 0218-A C2 0218-B B2 0218-C D2 0230 C5 FRONT CINCH + HEADPHONE 0232 E4 0234 F6 0249 B5 1150 E3 1151 F3 FRONT CINCH 1152 D3 1153 B3 4151 1154 C3 2171 B4 LEFT 2172 C4 3151...
  • Page 36 Schematics and PWB’s L9.2E GB 36 0105 E3 0214 A11 0216 B11 0223-A A2 0223-B E2 REAR I/O SCART (EUROPE) 0227 E6 0229 H6 1101 A4 1102 B3 5100 3100 for ITV only 1103 B4 0223-A A5-44 1104 C5 150R 0214 A13-44 Audio R O/P...
  • Page 37 Schematics and PWB’s L9.2E GB 37 VG2 F10 0165 B8 0244 G3 0245 C2 CRT PANEL 0254 D8 1300 B8 2313 F4 2323 D4 160V 160V 2331 B4 2341 F6 2342 H3 2343 H4 3311 F3 3312 F4 3313 F4 190V 3314 E4 160V...
  • Page 38 Schematics and PWB’s L9.2E GB 38...
  • Page 39 Schematics and PWB’s L9.2E GB 39 0239 D2 0239 D2 0240 B2 0240 B2 0248 E3 0248 E3 0248A E4 0248A E4 0257 D11 0257 D11 ITT AUDIO DECODING 0258 D11 0258 D11 1801 B9 1801 B9 2801 C3 2801 C3 2802 C4 2802 C4 2803 C5...
  • Page 40 Schematics and PWB’s L9.2E GB 40 0104 A4 0246 B10 0247 B11 2950 E3 2951 E5 ITT AUDIO AMPLIFIER 2952 C4 2953 B4 2954 A7 2955 D10 2 x 3W SOUND AMPLIFIER 2956 E5 For /94 only 2957 C7 2958 C9 0104 AudioSupply10V|14VA 2959 C9...
  • Page 41 Schematics and PWB’s L9.2E GB 41 0250-A C2 0250-C B2 0252 B2 0261 D5 1153 D3 2171 D4 2173 C3 3150 D4 3152 C4 3155 A4 6161 A3 9153 B3 0250-B D2 0251 B5 0253 A5 1152 A3 1154 C3 2172 C4 2174 D3 3151 C3...
  • Page 42 Schematics and PWB’s L9.2E GB 42 Personal notes: Personal notes:...
  • Page 43 Alignments L9.2E GB 43 8. Alignments General: the Service Default Mode (SDM) and Service • The alignment of the VG2 has been completed; Switch the Alignment Mode (SAM) are described in chapter 5. set to Standby. The values adapted at the BRIGHTNESS- and the CONTRAST-menu during the alignment, will change back again to their default values.
  • Page 44 GB 44 L9.2E Alignments To go back to the main SAM-menu , press the MENU key on 8.3.5 White tone the RC. To leave the SAM-menu and store the alignments in the NVN, • Connect a pattern generator (e.g. PM5418) and set it to press the STANDBY-key on the RC.
  • Page 45 ED = Europe Tri Mono EF = Europe Full Multi EL = Europe Full Multi with LL’ Tuner (OFF: Philips tuner; ON: Alps tuner) Default value = OFF Channel Select Time Window (OFF: 2 seconds; ON: 5 Time interval for entering a second digit for channel selection...
  • Page 46 GB 46 L9.2E Alignments (*) Remark: When option RC = OFF, the P+ and the P- key on the remote control have the same functions as the MENU UP/ DOWN keys while the VOL+ and the VOL- key have the same function as the MENU LEFT/RIGHT keys.
  • Page 47 Circuit description new circuits L9.2E GB 47 9. Circuit description new circuits Power supply (diagram A1) • Degaussing : R3504 is a PTC. When switching "on" the set, the PTC is cold and has a low-ohmic value. This allows a very high degaussing current at initial power on.
  • Page 48 GB 48 L9.2E Circuit description new circuits 9.3.4 Demagnetization control (pin 8 of IC7520) Under voltage protection of the secondary voltages If the supply voltage at pin 1 of IC 7520 drops below 9V because of a short-circuit or excessive load, the drive pulse Winding 1-2 has the same polarity as the secondary winding present at pin 3 will be disabled and IC7520 will switch off the that supplies the load.
  • Page 49 Circuit description new circuits L9.2E GB 49 The QSS-signal, Ext1Audio or Ext2Audio is switched internally to the output pins 28 and 29 of the sound processor. Pin 36 and MONO FM SETS 37 pass the same selected signal through to the SCART. The audio output of the MSP3415 is fed to the power amplifier BASS TREBLE...
  • Page 50 GB 50 L9.2E Circuit description new circuits • Pin 8: not connected 9.5.6 PLL-demodulator • Pin 9: Vst, tuning voltage +33V • Pin 10: ground The IF-signal is demodulated with the assistance of the PLL • Pin 11: IF, asymmetrical IF output detector.
  • Page 51 Circuit description new circuits L9.2E GB 51 Video Signal Processing (see circuit diagram 9.6.4 PAL and SECAM demodulation via the Auto system manager The colour decoder circuit detects whether the signal is a PAL 9.6.1 Introduction: signal. The result is made known to the auto system manager. The base-band delay line is activated when a PAL or SECAM The video signal processing can be divided in the following signal is detected.
  • Page 52 GB 52 L9.2E Circuit description new circuits the BIMOS is used as the feed back input from the CRT base Automatic Volume Level panel. B_TXT_OSD Blue TXT or OSD signal from uC to the video controller IC7250 (BIMOS) BASS Control signal for BASS 9.6.9 Beam current limiting Beam Current information...
  • Page 53 Circuit description new circuits L9.2E GB 53 FM/AM/ P2LLp/Mtrap Switching signal with several Ext_VC_AudioMono FM, AM or external mono signal from functions: M-trap (sound filtering) BiMOS to audio processor input (only switching (only for A/P Pal Multi sets) used in Mono and Nicam L sets) BiMOS crystal selection (only for Front/Ext1AudioL Front audio Left input signal / External...
  • Page 54 GB 54 L9.2E Circuit description new circuits United States; schematic/PCB information (only) applicable for North American sets V_TUNE Tuning voltage for tuner Vdrive - Negative Vertical drive pulse signal Vdrive + Positive Vertical drive pulse signal Vertical pulse derivation Vertical flyback pulse used to inform the micro controller that flyback is occurring.
  • Page 55 Spareparts list L9.2E GB 55 10. Spareparts list MONO CARRIER [A] 2202 5322 126 10465 3.9nF 10% 50V 2510 4822 126 11382 1nF 10% 1KV 2203 4822 124 41579 10µF 20% 50V 2510 4822 126 13517 820pF 10% 1000V 2205 4822 126 10002 100nF 20% 25V 2517 5322 122 32331 1nF 10% 100V...
  • Page 56 GB 56 L9.2E Spareparts list 3017 4822 051 20472 4k7 5% 0.1W 3272 4822 051 20273 27k 5% 0.1W 3611 4822 051 20822 8k2 5% 0.1W 3018 4822 117 11449 2k2 1% 0.1W 3273 4822 117 10833 10k 1% 0.1W 3612 4822 117 11503 220Ω...
  • Page 57 Spareparts list L9.2E GB 57 5540 4822 157 11835 4.7µH 5% 7431 5322 130 60508 BC857B 5545 4822 140 10668 LOT 14" 7460 4822 209 13176 TDA9302H 5545 4822 140 10671 LOT 20"/21" 7469 4822 130 60511 BC847B 5550 4822 157 60171 Bead EMI 100MHz 83R 7518 4822 130 10806 STP6NA60FI 6311...
  • Page 58 GB 58 L9.2E Spareparts list > 4xxx 4822 051 20008 0Ω 5% 0.25W 5801 4822 157 50965 15µH 10% 5811 4822 157 51462 10µH 10% 5812 4822 157 51462 10µH 10% 5813 4822 157 51462 10µH 10% 5814 4822 157 53139 4.7µH 6801 4822 130 30621 1N4148 6802...

Table of Contents