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Philips L01.1U User Manual

Philips L01.1U
106 pages
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Published by RB 0272 Service PaCE Printed in the Netherlands Subject to modification EN 3122 785 13220
©
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.
Colour Television Chassis
L01.1U
AC
CL 26532119_056.eps
171202
Contents Page Contents Page
1. Technical Specifications, Connections and
Chassis Overview 2
2. Safety and Maintenance Instructions, Warnings
and Notes 4
3. Directions for Use 6
4. Mechanical Instructions 40
5. Service Modes, Error Codes and Faultfinding 42
6. Block Diagram, I
2
C, Supply Voltage and
Testpoint Overviews
Block Diagram 47
I
2
C and Supply Voltage Diagram 48
Testpoint Overview Mono Carrier & CRT Panel 49
7. Electrical Diagrams and PWB’s Diagram CBA
Power Supply (Diagram A1) 50 65-70
Line Deflection (Diagram A2) 51 65-70
Frame Deflection (Diagram A3) 52 65-70
Tuner IF (Diagram A4) 53 65-70
Video IF + Sound IF (Diagram A5) 54 65-70
Synchronisation (Diagram A6) 55 65-70
Control (Diagram A7) 56 65-70
Audio Amplifier (Diagram A8) 57 65-70
NICAM, 2CS, BTSC Stereo Dec.(Diagram A9) 58 65-70
Audio/Video Source Switch (Diagram A10) 59 65-70
BTSC-NDBX Stereo Decoder (Diagram A11) 60 65-70
Front IO, Front Control and HP (Diagram A12) 61 65-70
Rear IO Cinch (Diagram A13) 62 65-70
PIP + Tilt Interface (Diagram A16) 63 65-70
Diversity Tables 64
CRT Panel: ECO Scavem (Diagram B1) 71 73-74
CRT Panel: ECO Scavem (Diagram B2) 72 73-74
Side AV Panel + Headphone (Diagram C) 75 75
Side AV Panel + HP (SLIM) (Diagram C1) 76 77
Side AV Panel + HP (WIDE) (Diagram C2) 78 79
Top Control Panel (Diagram E) 80 80
2D Line Comb Filter (Diagram F) 81 82
Top Control Panel (Diagram T) 83 84
Front Interface Panel (Diagram Q1) 85 85
DAF Panel +
Inner Pin Cushion Correction (Diagram W) 86 86
8. Alignments 87
9. Circuit Description 93
Abbreviation List 103
IC Data Sheets 104
10 Spare Parts List 105
11 Revision List 106
www.freeservicemanuals.info
22/11/2016
Published in Heiloo Holland
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Philips L01.1U Specifications

General IconGeneral
BrandPhilips
ModelL01.1U
CategoryTV
LanguageEnglish

Summary

Technical Specifications, Connections and Chassis Overview

1.1 Technical Specifications

Detailed technical parameters and reception capabilities of the TV.

1.2 Connections

Diagrammatic representation of AV and other input/output connections.

1.3 Chassis Overview

Visual guide to the location of main chassis components and PWB modules.

Safety & Maintenance Instructions, Warnings, and Notes

2.1 Safety Instructions for Repairs

Critical safety precautions and procedures for performing repairs.

2.2 Maintenance Instructions

Guidelines for routine maintenance and inspection intervals.

2.3 Warnings

Important warnings regarding high voltage, ESD, and component handling.

2.4 Notes

General notes and schematic interpretation guidelines for service.

Directions for Use

3.1 Front Control Sets

Explanation of front panel controls and basic TV operation.

3.2 Top Control Sets

Guide to operating the TV using top panel controls.

Mechanical Instructions

4.1 Set Disassembly

Step-by-step guide for safely disassembling the TV set.

4.2 Service Positions

Illustrates two methods for positioning the chassis for service access.

4.3 Assembly/Board Removal

Procedures for removing specific boards and modules from the chassis.

4.4 Set Re-assembly

Final checks and steps required before closing the TV set.

Service Modes, Error Codes and Fault Finding

5.1 Test Points

Overview of test points on the circuit board assemblies for diagnostics.

5.2 Service Modes

Details on entering and using Service Default Alignment Mode (SDAM).

5.3 Problems and Solving Tips Related to CSM

Troubleshooting common picture and sound issues.

5.4 ComPair

Information on using ComPair, a PC-based service tool for diagnostics.

5.5 Error Codes

Explanation of how to read and interpret error codes from the buffer.

5.6 The Blinking LED Procedure

Method for displaying error codes using the front LED.

5.7 Protections

Overview of protection modes and error code indications.

5.8 Repair Tips

Specific tips for diagnosing and repairing common faults.

Block Diagram, I2C, Supply Voltage and Testpoint Overview

Block Diagram

High-level functional overview of the chassis systems.

I2C and Supply Voltage Diagram

Detailed diagrams showing I2C bus connections and supply voltages.

Testpoint Overview

Location and expected waveforms for key test points.

Circuit Diagrams and PWB Layouts

Mono Carrier: Power Supply

Schematic diagram for the TV's power supply unit.

Mono Carrier: Line Deflection

Circuit diagram for the horizontal deflection system.

Mono Carrier: Frame Deflection

Circuit diagram for the vertical deflection system.

Mono Carrier: Tuner IF

Circuit diagram for the tuner and intermediate frequency stages.

Mono Carrier: Video IF + Sound IF

Circuit diagram for video and sound intermediate frequency processing.

Mono Carrier: Synchronization

Circuit diagram for horizontal and vertical synchronization.

Mono Carrier: Control

Circuit diagram for the main control and microprocessor functions.

Mono Carrier: Audio Amplifier

Circuit diagram for the audio amplification stage.

Mono Carrier: NICAM + 2CS + BTSC (Stereo/SAP) Decoder

Circuit diagram for stereo audio decoding.

Mono Carrier: Audio/Video Source Switching

Circuit diagram for selecting audio/video input sources.

Mono Carrier: BTSC NDBX Stereo Decoder

Circuit diagram for the BTSC NDBX stereo decoder.

Mono Carrier: Front I/O + Front Control + Headphone

Circuit diagram for front panel interfaces and headphone jack.

Mono Carrier: Rear I/O Cinch

Circuit diagram for rear panel analog audio/video connections.

Mono Carrier: PIP Interface Circuit + Tilt Interface

Circuit diagrams for PIP and tilt interface functions.

Mono Carrier: Diversity Tables

Tables listing component variations based on region and features.

Layout Mono Carrier: Top Side

PWB layout illustration for the top side of the mono carrier.

Layout Mono Carrier (Overview Bottom Side)

PWB layout overview for the bottom side of the mono carrier.

Layout Mono Carrier (Part 1 Bottom Side)

PWB layout illustration for part 1 of the bottom side.

Layout Mono Carrier (Part 2 Bottom Side)

PWB layout illustration for part 2 of the bottom side.

Layout Mono Carrier (Part 3 Bottom Side)

PWB layout illustration for part 3 of the bottom side.

Layout Mono Carrier (Part 4 Bottom Side)

PWB layout illustration for part 4 of the bottom side.

CRT Panel ECO SCAVEM

Circuit diagram for the CRT panel ECO SCAVEM system.

CRT Panel ECO SCAVEM

Circuit diagram for the CRT panel ECO SCAVEM system.

Layout CRT Panel (Top Side)

PWB layout illustration for the top side of the CRT panel.

Layout CRT Panel (Bottom Side)

PWB layout illustration for the bottom side of the CRT panel.

Side AV Panel + HP Panel

Circuit diagram for the Side AV and Headphone panel.

Layout Side AV + HP Panel

PWB layout illustration for the Side AV and Headphone panel.

Side AV Panel + HP Panel (Slim)

Circuit diagram for the Slim version of the Side AV/HP panel.

Layout Side AV Panel + HP Panel (Slim) (Top Side)

PWB layout for the top side of the Slim Side AV/HP panel.

Layout Side AV Panel + HP Panel (Slim) (Bottom Side)

PWB layout for the bottom side of the Slim Side AV/HP panel.

Side AV Panel + HP Panel (Wide)

Circuit diagram for the Wide version of the Side AV/HP panel.

Layout Side AV Panel + HP Panel (Wide) (Top Side)

PWB layout for the top side of the Wide Side AV/HP panel.

Layout Side AV Panel + HP Panel (Wide) (Bottom Side)

PWB layout for the bottom side of the Wide Side AV/HP panel.

Top Control Panel

Circuit diagram for the top control panel interface.

Layout Top Control Panel (Top Side)

PWB layout for the top side of the top control panel.

Layout Top Control Panel (Bottom Side)

PWB layout for the bottom side of the top control panel.

2D 3 Line Comb Filter

Circuit diagram for the 2D 3-line comb filter for Y/C separation.

Layout 2D 3 Line Comb Filter (Top Side)

PWB layout for the top side of the comb filter.

Layout 2D 3 Line Comb Filter (Bottom Side)

PWB layout for the bottom side of the comb filter.

Top Control Panel

Circuit diagram for the top control panel, including voice control.

Layout Top Control Panel (Top Side)

PWB layout for the top side of the top control panel.

Layout Top Control Panel (Bottom Side)

PWB layout for the bottom side of the top control panel.

Front Interface Panel

Circuit diagram for the front interface panel connections.

Layout Front Interface Panel

PWB layout illustration for the front interface panel.

DAF Panel + Inner Pin Cushion Correction

Circuit diagram for DAF and inner pin cushion correction.

Layout DAF Panel + Inner Pin Cushion Correction

PWB layout for the DAF and pin cushion correction circuits.

Alignments

8.1 General Alignment Conditions

Prerequisites and general conditions for performing TV alignments.

8.2 Hardware Alignments

Procedures for physical adjustments to the TV's hardware.

8.2.1 Vg2 Adjustment

Step-by-step guide for adjusting the Vg2 voltage for screen brightness.

8.2.2 Focusing

Procedure for adjusting the focus potentiometer for sharp picture.

8.3 Software Alignments and Settings

Procedures for adjusting TV parameters via software menus.

8.3.1 Options

How to change option bytes to configure features and hardware.

8.3.2 Tuner

Alignment procedure for the TV tuner, typically after NVM replacement.

8.3.3 White Tone

Adjustment of red, green, and blue levels for color temperature.

8.3.4 Geometry

Adjustments for picture size, position, and shape for optimal display.

8.3.5 Audio

Alignment procedures for audio settings like AF-M and A2T thresholds.

Circuit Description

9.1 Introduction

Overview of the L01.1U AC chassis architecture and features.

9.2 Audio Signal Processing

Description of mono and stereo audio signal paths.

9.2.1 Stereo

Detailed explanation of the stereo sound signal processing path.

9.2.2 Mono

Detailed explanation of the mono sound signal processing path.

9.3 Video Signal Processing

Explanation of the video signal path from RF input to CRT.

9.3.1 Introduction

Overview of the video signal processing stages.

9.3.2 RF Signal Processing

Description of tuner, IF, and AGC functions.

9.3.3 Video Source Selection

How the TV selects between different video input sources.

9.3.4 Comb Filter

Explanation of comb filter types and their function in Y/C separation.

9.3.5 Video Demodulation

Description of the color decoder's function for PAL, NTSC, SECAM.

9.3.6 Luminance / Chrominance signal Processing

Details on Y/C processing, black/white stretch, and skin tone correction.

9.3.7 RGB Control

Explanation of RGB control for picture parameters and cut-off stabilization.

9.3.8 RGB Amplifier

Description of the RGB amplifier stage driving the CRT.

9.3.9 SCAVEM (if present)

Explanation of the SCAVEM circuitry for horizontal deflection enhancement.

9.4 Synchronization

Description of horizontal and vertical sync signal processing.

9.5 Deflection

Explanation of horizontal and vertical deflection circuits.

9.5.1 Horizontal Drive

Description of the horizontal drive signal generation and EHT protection.

9.5.2 Vertical Drive

Explanation of the vertical drive circuit and its protection mechanisms.

9.5.3 Deflection Corrections

Details on linearity, S-correction, East/West, and Panorama corrections.

9.6 Power Supply

Description of the switching mode power supply and its operation.

9.6.1 Introduction

Overview of the SMPS and its benefits.

9.6.2 Basic IC Functionality

Explanation of Quasi-Resonant mode operation and time intervals.

9.7 Control

Description of microprocessor control, I2C bus, and user interface.

9.8 Abbreviation list

Glossary of technical terms and abbreviations used in the manual.

Spare Parts List

Revision List

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