Philips L01H.1A Service Manual
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Philips L01H.1A Service Manual

Philips L01H.1A Service Manual

Colour television
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Colour Television
Contents
Voltage Overview
2
I
C And Supply Voltage Overview
7. Electrical Diagrams and PWB's
Power Supply
Line Deflection
Frame Deflection
Tuner IF
Video IF and Sound IF
Synchronization
Control
Audio Amplifier
NICAM (Stereo/SAP) Decoder (Diagram A9)
Audio/Video Source Switching (Diagram A10) 32
Front I/O + Control, Headphone(Diagram A12) 33
Rear I/O Cinch
Tilt and Rotation
CRT
SCAVEM
Side AV
Side AV and Headphone
EPS4B External Power Supply (Diagram F)
UIR/LS Module
Interface Panel
©
Copyright 2002 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 RB 0262 Service PaCE
Page
2
4
5
13
15
2
C And Supply
19
20
21
22
Diagram PWB
(Diagram A1)
23
36-41
(Diagram A2)
24
36-41
(Diagram A3)
25
36-41
(Diagram A4)
26
36-41
(Diagram A5)
27
36-41
(Diagram A6)
28
36-41
(Diagram A7)
29
36-41
(Diagram A8)
30
36-41
31
36-41
36-41
36-41
(Diagram A13) 34
36-41
(Diagram A15) 35
36-41
(Diagram B1)
42
44
(Diagram B2)
43
44
(Diagram E)
45
45
(Diagram E1)
46
46
47
48
(Diagram H)
49
51
(Diagram J)
50
51
Printed in the Netherlands
Contents
List of Abbreviations
Subject to modification
Chassis
L01H.1A
AA
CL 26532029_000.eps
010302
Page
52
53
54
54
55
60
69
71
EN 3122 785 11650

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  • Page 1: Table Of Contents

    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 RB 0262 Service PaCE...

  • Page 2: Technical Specifications, Connections And Chassis Overview

    EN 2 L01H.1A Technical Specifications, Connections and Chassis Overview 1. Technical Specifications, Connections and Chassis Overview Index: : NICAM B/G, D, D/K, I 1. Technical Specifications. : BI-NICAM B/G, D, D/ 2. Connections. K, I 3. Chassis Overview. A/V connections : NTSC 3.58, 4.43...
  • Page 3 Technical Specifications, Connections and Chassis Overview L01H.1A EN 3 Audio / Video In 2 - Audio L (0.5 Vrms / 10 kΩ) CVBS (1 Vpp / 75 Ω) 1 - Video 3 - Audio R (0.5 Vrms / 10 kΩ) 2 - Audio L (0.2 Vrms / 10 kΩ)

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

    EN 4 L01H.1A Safety & Maintenance Instructions, Warnings, and Notes 2. Safety & Maintenance Instructions, Warnings, and Notes Safety Instructions For Repairs Warnings Safety regulations require that during a repair: • In order to prevent damage to ICs and transistors, avoid all •...

  • Page 5: Directions For Use

    Directions for Use L01H.1A EN 5 3. Directions for Use...
  • Page 6 EN 6 L01H.1A Directions for Use...
  • Page 7 Directions for Use L01H.1A EN 7...
  • Page 8 EN 8 L01H.1A Directions for Use...
  • Page 9 Directions for Use L01H.1A EN 9...
  • Page 10 EN 10 L01H.1A Directions for Use...
  • Page 11 Directions for Use L01H.1A EN 11...
  • Page 12 EN 12 L01H.1A Directions for Use...

  • Page 13: Mechanical Instructions

    Mechanical Instructions L01H.1A EN 13 4. Mechanical Instructions Index: Main panel with bracket. 1. Rear Cover Removal 1. Disconnect the strain relief of the AC power cord. 2. Service Position Main Panel 2. Disconnect the degaussing coil by removing the cable from 3.
  • Page 14 EN 14 L01H.1A Mechanical Instructions Side I/O Panel Removal 1. Remove the complete Side I/O assembly after unscrewing the two fixation screws [1]. 2. Release the 2 fixation clamps [2] and lift the board out of the bracket. CL 06532012_004.eps...

  • Page 15: Service Modes, Error Codes And Faultfinding

    Service Modes, Error Codes and Fault Finding L01H.1A EN 15 5. Service Modes, Error Codes and Fault Finding Index: – 61.25 MHz (channel 3) for NTSC set (AP-NTSC) 1. Test points. • Colour system: 2. Service Modes. – PAL-BG for AP-PAL.
  • Page 16 EN 16 L01H.1A Service Modes, Error Codes and Fault Finding – X = the main software version number. CSM Menu – Y = the sub software version number. 3. S Indication of the actual mode. S= SDAM= Service Default Alignment mode.
  • Page 17 Service Modes, Error Codes and Fault Finding L01H.1A EN 17 2. Select the INSTALLATION sub menu. 5.3.2 Sound Problems 3. Select and change the SYSTEM setting until picture and sound are correct. No sound or sound too loud (after channel change / 4.
  • Page 18 EN 18 L01H.1A Service Modes, Error Codes and Fault Finding The Blinking LED Procedure • Set is non-stop in hiccup mode Set is in over current mode; check the secondary sensing (opto coupler 7515) and the MainSupply voltage. Signal Via this procedure, you can make the contents of the error Stdby_con must be logic low under normal operation buffer visible via the front LED.

  • Page 19: Block Diagram, Testpoints, I

    Block Diagram, Testpoints, I2C, and Supply Voltage Overview L01H.1A 6. Block Diagram, Testpoints, I C, and Supply Voltage Overview Block Diagram UIR/LS 1259 INTERFACE (FOR SYSTEM SETS ONLY) 0240 AUDIO AMPLIFIER FRONT CONTROL CONTROL +3.3V +3.3V DATA-OUT 32 PIN SMART CARD CONNECTOR (FOR 29"...

  • Page 20: Wiring Diagram

    Block Diagram, Testpoints, I2C, and Supply Voltage Overview L01H.1A Wiring Diagram EPS 4B PANEL TOP CONTROL LEFT FRONT INTERFACE PANEL TOP CONTROL 0254 0215 0255 0211 0215 0214 0212 RIGHT 0219 0231 INTERFACE PANEL 0211 0242 0227 0212 0280 0228...

  • Page 21: Testpoint Overview

    Block Diagram, Testpoints, I2C, and Supply Voltage Overview L01H.1A Testpoint Overview Main Panel Copper Track side AUDIO OUTPUT 7901 OR 7902 1V / div DC 500mV / div DC 1V / div DC TV-PROC. 20us / div 5ms / div...
  • Page 22 Block Diagram, Testpoints, I2C, and Supply Voltage Overview L01H.1A I2C And Supply Voltage Diagram POWER SUPPLY SCAVEM LINE DEFLECTION 5445 3362 ANODE CRT +13Va FOCUS FOCUS 5500 : 6500 6560 FOCUS CRT 5560 5564 5561 MAIN SUPPLY 3487 0231 5451...
  • Page 23 Schematics and PWB’s L01H.1A 7. Schematics and PWB’s Large Signal Panel: Power supply 0211 C2 6500 C7 I539 F11 0212 A2 6520 E2 I540 D9 POWER SUPPLY 0213 C6 6522 E3 I541 E9 VlotAux+13V 2581 0231 C2 6523 D5 I542 C9...
  • Page 24 Schematics and PWB’s L01H.1A Large Signal Panel: Line Deflection 0220 B3 5400 F5 I453 E10 0221 B7 5401 F5 I454 E10 1400 C5 5445 B7 I455 E10 2400 F4 5450 B2 I456 C6 2401 G5 5451 A6 I457 C7 2402 G4...
  • Page 25 Schematics and PWB’s L01H.1A Large Signal Panel: Frame Deflection 0222 B10 2471 A7 2472 B8 VlotAux+13V 2473 A9 2474 B5 2475 C5 2476 A9 VlotAux+50V FRAME DEFLECTION 3470 A8 3471 C9 3472 C9 3473 C9 3474 B6 2473 3475 C6...
  • Page 26 Schematics and PWB’s L01H.1A Large Signal Panel: Tuner IF 0265 A5 0283 C3 0285 B3 1000 B4 1002 D8 1003 E8 1004 F8 TUNER IF 2001 D4 2002 D5 AP/CH 38.9/38.0 LA/NA/AP 45.75 FM-RADIO ANTENNA FM Radio Non-LNA & 2003 D6...
  • Page 27 Schematics and PWB’s L01H.1A Large Signal Panel: Video IF + Sound IF 0243 C7 6201 F4 0248 C2 6202 F6 0249 B2 6203 F9 0266 E11 6204 F9 0276 D3 6206 G4 0297 D6 7200-A B10 1200 E8 7200-C C3...
  • Page 28 Panasonic-EW-21" RF SMD Jumper 270K Philips-EW-25" SMD Jumper 680K Philips-EW-29" FSQ SMD Jumper 680K Philips-EW-29" N SMD Jumper 680K Philips-EW-29" SF CH SMD Jumper 680K Philips-EW-32" SMD Jumper 680K Samsung-EW-25" RF SMD Jumper 680K Samsung-EW-25" RF CH SMD Jumper 680K Samsung-EW-29"...

  • Page 29: Div Dc 500Us / Div

    Schematics and PWB’s L01H.1A Large Signal Panel: Control 0217 G3 0240 B4 0250 B3 CONTROL 0261 D3 0273 B5 FOR PIP FOR ITV ONLY 0274 B9 F612 3611 F606 0279 C4 +3.3V 100R 0304 H3 DATA-OUT +3.3V 1660 E8 7602...

  • Page 30: Div Dc 500Us / Div

    Schematics and PWB’s L01H.1A Large Signal Panel: Audio Amplifier 0246 C10 0267 G3 0271 C3 0275 B5 0280 E10 AUDIO_AMPLIFIER 0281 D10 2901 B7 2902 B8 2903 B6 2904 C5 2905 C5 AmpOutR+ 2906 D5 9903 2907 D5 A12-70 6903...

  • Page 31: Div Dc 500Mv / Div Dc

    Schematics and PWB’s L01H.1A Large Signal Panel: NICAM + 2CS + BTSC (Stereo / SAP Decoder) 0239 G10 1831 C9 2831 C9 2832 C9 2833 D5 2834 B4 2835 B4 NICAM + 2CS + BTSC (STEREO/SAP) DECODER (AP) 2836 B5...
  • Page 32 Schematics and PWB’s L01H.1A Large Signal Panel: Audio / Video Source Switching 0296 B5 2801 A5 AUDIO/VIDEO SOURCE SWITCHING (AP) 2802 E5 2803 C3 2804 B6 From Micronas 2805 D6 3801 A5 SC2_CTRL 3802 A5 A9-50 I801 3801 +6V8 3803 B5...
  • Page 33 Schematics and PWB’s L01H.1A Large Signal Panel: Front I/O + Front Control + Headphone 0214 F10 0215 C5 0218-A C3 0218-B C3 0218-C B3 0219 D5 0232 F5 FRONT IO + FRONT CONTROL + HEADPHONE 0259 F11 0270 B6 0277-A B2...
  • Page 34 Schematics and PWB’s L01H.1A Large Signal Panel: Rear I/O Cinch 0223-A B10 7102 E3 0223-B F3 7103 E2 0223-C C3 9101 D4 0223-D B3 9102 D4 0225-A D10 9103 C4 0225-B D10 9111 C5 0226 E3 9112 D5 REAR I/O CINCH...
  • Page 35 Schematics and PWB’s L01H.1A Large Signal Panel: Tilt and Rotation Personal Notes: 0268 C6 2171 D2 2172 D3 3171 C2 3173 C2 3174 C3 TILT & ROTATION 7000 C4 F171 C6 F172 D6 I171 C2 I172 C2 I173 C3 I174 D3...
  • Page 36 Schematics and PWB’s L01H.1A Layout Large Signal Panel (Top View) CL 16532053_005.eps 050601...
  • Page 37 Schematics and PWB’s L01H.1A Layout Large Signal Panel (Mapping Top View) Layout Large Signal Panel (Overview Bottom View) Part 1 CL 16532053_06a.eps Part 2 CL 16532053_06b.eps Part 3 Part 4 CL 16532053_06c.eps CL 16532053_06d.eps CL 16532053_006.eps 100701 CL 16532053_05m.eps 100701...
  • Page 38 Schematics and PWB’s L01H.1A Layout Large Signal Panel (Part 1 Bottom View) Part 1 CL 16532044_06a.eps 240801...
  • Page 39 Schematics and PWB’s L01H.1A Layout Large Signal Panel (Part 2 Bottom View) Part 2 CL 16532053_06b.eps 310501...
  • Page 40 Schematics and PWB’s L01H.1A Layout Large Signal Panel (Part 3 Bottom View) Part 3 CL 16532053_06c.eps 040601...
  • Page 41 Schematics and PWB’s L01H.1A Layout Large Signal Panel (Part 4 Bottom View) Part 4 CL 16530153_06d.eps 050601...
  • Page 42 Schematics and PWB’s L01H.1A CRT Panel VG2 F10 0165 A8 0244 E2 0245 D2 CRT PANEL 0254-A B7 0255 B7 0256-A B7 AQUADAG 2330 B4 1V / div DC 1V / div DC 1V / div DC 50V / div DC...
  • Page 43 Schematics and PWB’s L01H.1A CRT Panel: SCAVEM 0278 D11 2360 B9 2361 B4 2364 C4 2365 D9 2366 E9 2367 E5 SCAVEM 2368 E8 2369 D4 2371 E4 2372 C5 2373 E5 2374 E6 2375 D10 3360 A8 F330 3360...
  • Page 44 Schematics and PWB’s L01H.1A Layout CRT Panel (Top View) Layout CRT Panel (Bottom View)
  • Page 45 Schematics and PWB’s L01H.1A Side AV Panel Layout Side AV Panel (Top View) 0250-A B1 0250-B C1 SIDE AV 0250-C A1 0251 B4 0252 B1 0253 A4 0261 D4 0253 1152 A2 1153 C2 1154 B2 2171 C3 2172 B3...
  • Page 46 Schematics and PWB’s L01H.1A Side AV Panel + Headphone Layout Side AV Panel + Headphone (Top View) 0232 D4 0250-A B2 SIDE AV PANEL & HEADPHONE 0250-B C2 0250-C A2 0251 B5 0252 B2 0253 A5 0254 D2 0255 D5...
  • Page 47 Schematics and PWB’s L01H.1A EPS 4B (External Power Supply) EPS 4B (External Power Supply) UU9.8 22MH UU9.8 22MH 0211 1A/250V 5W 400V (Power Supply) 0.1UF/275VAC 33UF/450V 1.5M(1/2W) 1A 600V 7.5M 0.01UF/1KV 0.001UF/1KV 0228 RH-3.5*0.8*9 KA278R12 330UF/25V 3A 100V 1A 100V...
  • Page 48 Schematics and PWB’s L01H.1A Layout EPS 4B (External Power Supply) R13 B3 R14 B1 R16 B1 BR1 D4 R23 B4 R25 B2 R26 B2 R27 B3 R28 B3 R29 B3 C11 B3 ZD1 D3 C12 D2 ZD2 C3 C20 C1...
  • Page 49 Schematics and PWB’s L01H.1A UIR/LS Module UIR/LS MODULE 1251 T0 0251 OF MAIN_AUX 270R 1N4148 STDBY C5V6 100uF 3 P (Black) Ver POWER SUPPLY HEF4053 100n 100R IR_IN DATA_IN 100R BC847B Clock IR_IN STATUS Data_in MODE DATA_OUT STATUS Data_out IR_OUT...
  • Page 50 Schematics and PWB’s L01H.1A Interface Panel INTERFACE PANEL To EPS 0228 0228 EH-B(5) TO 0228 OF USA ONLY 5705 2700 +5Veps 3740 +12Veps AGND 220R-NL 3704 7710 +3.3Veps 3700 DS1813R-5 2702 (Red) AGND AGND AGND 3702 AGND Reset +12Veps 7712...
  • Page 51 Schematics and PWB’s L01H.1A Layout UIR/LS Module (Top View) Layout Interface Panel 0242 White 0227 1251 1246 9005 Black 1002 JP10 9001 JP12 1800 0228 3739 9020 3740 JP20 JP15 JP23 JP19 1700 6703 6701 0217 White JP16 9008 Yellow...

  • Page 52: Front Interface & Control Panel (Diagram Q)

    Schematics and PWB’s L01H.1A Front Interface & Control Panel 0211 B3 0212 B5 0214 E2 0218 D2 0231 B4 0232 D9 0254 D7 (AP) FRONT INTERFACE + CONTROL PANEL 0255 D9 1600 G5 1601 F4 1602 F4 1603 F4 1606 F3...
  • Page 53 Schematics and PWB’s L01H.1A Layout Front Interface & Control Panel (Top View) CL 16532020_104.eps 240801...
  • Page 54 Schematics and PWB’s L01H.1A Front Interface Panel Layout Front Interface Panel (Top View) 0211 B3 0212 B5 0214 D3 FRONT INTERFACE PANEL 0218 D3 0231 B4 1606 E4 2691 E5 2698 E5 3500 C3 3501 C3 3685 E4 3691 E4...

  • Page 55: Alignments

    Alignments L01H.1A EN 55 8. Alignments Index: 8.2.1 Vg2 Adjustment (AKB method) General Alignment Conditions Hardware Alignments 1. Connect the RF output of a pattern generator to the Software Alignments and Settings antenna input. Test pattern is a 'black' picture (blank screen on CRT without any OSD info).
  • Page 56 25HT2011/93Z 113 0 ON / OFF 25HT2011/94Z 113 0 WIDESCREEN ON / OFF 25HT2212/67R 113 0 TUNER NONE / APLS / PHILIPS 25HT2212/69R 113 0 ON / OFF 25HT2012/79R 113 0 CHINA ON / OFF 25HT2012/93R 113 0 US REGION CODE...
  • Page 57 Radio 1 = Tuner has FM radio feature and TV chasis support FM radio 1 = Tuner has LNA feature Tuner 0 = None (no tuner), 1 = Philips (model), 2 = Alps (model) Byte 3 Not Used (Devices) Not Used...
  • Page 58 EN 58 L01H.1A Alignments 8.3.2 Deflection 8.3.4 White Tone The Deflection Sub menu contains the following items: White Tone Menu • AKB ON to enable, OFF to disable the 'black current loop' (AKB = Auto Kine Bias). • Brightness (set Brightness) •...
  • Page 59 Alignments L01H.1A EN 59 8.3.5 Geometry • Select East-West Width EW and align the picture width until the side castellations disappear. • Select East-West Parabola / width PW and align the The geometry alignments menu contains several items to align vertical sides until the sides are straightened.

  • Page 60: Circuit Description

    EN 60 L01H.1A Circuit Description 9. Circuit Description Index: 1. Introduction The L01 is divided into 2 basic systems, i.e. mono and stereo 2. Audio Signal Processing sound. While the audio processing for the mono sound is done 3. Video Signal Processing in the audio block of the UOC, an external audio processing IC 4.
  • Page 61 Circuit Description L01H.1A EN 61 9.2.2 Mono 9.3.3 Video Source Selection In mono sets, the signal goes via the SAW filter (position 1004 The Composite Video Blanking Signal (CVBS) from buffer in case of QSS demodulation and 1003 in case of Intercarrier...
  • Page 62 EN 62 L01H.1A Circuit Description Also some picture improvement features are implemented in voltage on pin 54 is normally 3.3 V (limiter not active). this part: During set switch-off, the black current control circuit • Black stretch This function corrects the black level of generates a fixed beam current of 1 mA.
  • Page 63 Circuit Description L01H.1A EN 63 divided by two, to lock the first control loop to the incoming IC7471 is supplied by +13 V. The vertical flyback voltage is signal. determined by an external supply voltage at pin 6 When the IC is switched ‘on’, the ‘Hdrive’ signal is suppressed (VlotAux+50V).
  • Page 64 EN 64 L01H.1A Circuit Description The ‘Ewdrive’ signal from pin 15 of IC7200 takes care for the correct correction. It drives FET TS7400. It also corrects SUPPLY START-UP V CC breathing of the picture, due to beam current variations (the...
  • Page 65 Circuit Description L01H.1A EN 65 Degaussing Control Circuit B1/B2 n⋅V Main Supply Focus Mains AC Input Main Power Panel VideoSupply Supply Main Aux Filament Tilt& Rotation GATE Degaussing Circuit VlotAux +13V 3V3 Reg. Correction Horizontal GATE Vaux Deflection +3.9V +3.3V...
  • Page 66 EN 66 L01H.1A Circuit Description The moment that the voltage on pin 1 drops below the ‘under voltage lock out‘ level (UVLO = ± 9 V), the IC will stop switching and will enter a safe restart from the rectified mains voltage.
  • Page 67 Circuit Description L01H.1A EN 67 In Standby, the power supply works in ‘burst mode’. Burst mode can be used to reduce the power consumption Active/ below 1 W at stand-by. During this mode, the controller is active inactive (generating gate pulses) for only a short time and for a longer time inactive waiting for the next burst cycle.
  • Page 68 EN 68 L01H.1A Circuit Description Over Power Protection 9.7.1 Introduction During the primary stroke, the rectified AC input voltage is measured by sensing the current drawn from pin 4 (DEM). This The microprocessor part of the UOC, has the complete control current is dependent on the voltage on pin 9 of transformer and teletext on board.
  • Page 69 Circuit Description L01H.1A EN 69 • SEL-MAIN-FRNT-RR This is the source select control signal from the microprocessor. This control line is under In case one of these protections is activated, the set will go into user control or can be activated by the other two control ‘standby’.
  • Page 70 EN 70 L01H.1A Circuit Description Field Memory Sandcastle: pulse derived from sync Frequency Modulation signals Horizontal Acquisition: horizontal sync Short Circuit pulse coming out of the HIP SCAVEM Scan Velocity Modulation Horizontal Flyback Pulse: horizontal Serial Clock sync pulse from large signal deflection...

  • Page 71: Spare Parts List

    Spare Parts List L01H.1A EN 71 10. Spare Parts List Mono Carrier [A] 2226 5322 126 10465 3.9nF 10% 50V 2560 4822 126 14152 680pF 10% 1KV 2227 4822 122 32614 1N2 10% 63V 2561 2020 021 91496 100µF 20% 160V...
  • Page 72 EN 72 L01H.1A Spare Parts List 3126 4822 117 10834 47k 1% 0.1W 3459 4822 053 11153 15k 5% 2W 3623 4822 051 20472 4k7 5% 0.1W 3136 4822 116 52175 100Ω 5% 0.5W 3460 4822 116 52276 3k9 5% 0.5W 3624 4822 116 52175 100Ω...
  • Page 73 Spare Parts List L01H.1A EN 73 5832 4822 157 11139 6.8µH 5% 7522 4822 130 60511 BC847B 3388 4822 116 83872 220Ω 5% 0.5W 5833 4822 157 11139 6.8µH 5% 7540 4822 130 40959 BC547B 3389 4822 116 83872 220Ω 5% 0.5W...
  • Page 74 EN 74 L01H.1A Spare Parts List 4822 130 10852 BZX284-C6V8 5603 4822 157 11867 5.6µH 5% 4822 130 60511 BC847B 5604 4822 157 11867 5.6µH 5% 4822 130 60373 BC856B 9310 125 00235 N-CHANNEL MOS BSN20 7700 4822 130 60511 BC847B...

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