Philips 21PT5421/12 User Manual

Published by JH 0664 BG CD Customer Service Printed in The Netherlands Subject to modification EN 3122 785 16011
©
Copyright 2006 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
TE3.2E
CA
G_16010_000.eps
260406
Contents Page Contents Page
1. Technical Specifications, Connections and Chassis
Overview 2
2. Safety Instructions, Warnings, and Notes 5
3. Directions for Use 7
4. Mechanical Instructions 8
5. Service Modes, Error Codes and Fault Finding 9
6. Block Diagrams, Test Point Overviews, and
Waveforms
Block Diagram Audio / Video 11
Block Diagram Power Supply 12
I2C Diagram 13
Block Diagram 13
7. Circuit Diagrams and PWB Layouts Diagram PWB
Main Panel (05TA085-5): MCU (A1) 16 23-24
Main Panel (05TA085-5): Video (A2) 17 23-24
Main Panel (05TA085-5): Sound (A3) 18 23-24
Main Panel (05TA085-5): Power (A4) 19 23-24
Main Panel (05TA085-5): Deflection (A5) 20 23-24
CRT Panel (05TA085-5) (A6) 21 23-24
Main Panel (05TA085-5): SCART (A7) 25 23-24
Main Panel (05TA085-6): MCU (A1) 25 32-33
Main Panel (05TA085-6): Video (A2) 26 32-33
Main Panel (05TA085-6): Sound (A3) 27 32-33
Main Panel (05TA085-6): Power (A4) 28 32-33
Main Panel (05TA085-6): Deflection (A5) 29 32-33
CRT Panel (05TA085-6) (A6) 30 32-33
Main Panel (05TA085-6): SCART (A7) 31 32-33
Side I/O Panel (21PT5421 only) (A8) 34 35
8. Alignments 37
9. Circuit Descriptions, Abbreviation List, and IC Data
Sheets 39
Abbreviation List 42
IC Data Sheets 43
10. Spare Parts List 51
11. Revision List 78

Philips 21PT5421/12 Specifications

General

Display Type	CRT
Screen Size	21 inches
Aspect Ratio	4:3
Teletext	Yes
Tuner	Analog
Connectivity	SCART

Summary

1. Technical Specifications, Connections and Chassis Overview

1.1 Technical Specifications

Details on reception, tuning, colour, sound systems, and A/V.

1.2 Connections / Control Facilities

Describes rear and side connections for various inputs/outputs.

1.2.3 Rear Connections 21PT5421 only

Detailed pinout and specifications for rear connection ports.

1.2.4 Side Connections 21PT5421 only

Details on side AV input and headphone connections.

1.3 Chassis Overview

Overview of the main chassis components and their layout.

2. Safety Instructions, Warnings, and Notes

2.1 Safety Instructions

Essential safety regulations and precautions for repair.

2.2 Maintenance Instructions

Guidelines for post-repair checks and returning the set to original condition.

2.3 Warnings

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

2.4.2 Schematic Notes

Notes on interpreting resistor and capacitor values in schematics.

2.4.3 Rework on BGA ICs

Procedure and precautions for reworking Ball Grid Array integrated circuits.

2.4.4 Lead-free Solder

Guidelines for handling lead-free solder and components.

2.4.5 Practical Service Precautions

Precautions to avoid electrical shock and protect components during service.

3. Directions for Use

4. Mechanical Instructions

4.1 Rear Cover Removal

Step-by-step guide for safely removing the rear cover.

4.2 Service Position Main Panel

Instructions for positioning the main panel during service.

4.3 Rear Cover Mounting

Steps for correctly reattaching the rear cover after service.

5. Service Modes, Error Codes and Fault Finding

5.1 Service Modes

Accessing and navigating the TV's service mode for adjustments.

5.2 Fault Tracing Diagram for Power Supply

Flowchart to diagnose power supply issues.

6. Block Diagrams, Test Point Overviews, and Waveforms

Block Diagram Audio / Video

Diagram showing audio and video signal flow.

Block Diagram Power Supply

Diagram illustrating the power supply unit's architecture.

I2C Diagram

Diagram showing the Inter-Integrated Circuit communication bus.

System Block Diagram

Overall system block diagram illustrating major modules and connections.

7. Circuit Diagrams and PWB Layouts

Main Panel (05TA085-5): MCU

Circuit diagram for the MCU section of the main board.

Main Panel (05TA085-5): Video

Circuit diagram for the video processing section of the main board.

Main Panel (05TA085-5): Sound

Circuit diagram for the audio processing section of the main board.

Main Panel (05TA085-5): Power

Circuit diagram for the power supply section of the main board.

Main Panel (05TA085-5): Deflection

Circuit diagram for the deflection circuitry of the main board.

CRT Panel (05TA085-5) CRT

Circuit diagram for the CRT panel.

Main Panel (05TA085-5): SCART

Circuit diagram for SCART connection interfaces.

Layout Main Panel (05TA085-5) Top Side

Top-side component layout of the main board.

Layout Main Panel (05TA085-5) Bottom Side

Bottom-side component layout of the main board.

Main Panel (05TA085-6): MCU

Circuit diagram for the MCU section of the 05TA085-6 main board.

Main Panel (05TA085-6): Video

Circuit diagram for the video section of the 05TA085-6 main board.

Main Panel (05TA085-6): Sound

Circuit diagram for the sound section of the 05TA085-6 main board.

Main Panel (05TA085-6): Power

Circuit diagram for the power section of the 05TA085-6 main board.

Main Panel (05TA085-6): Deflection

Circuit diagram for the deflection circuitry of the 05TA085-6 main board.

CRT Panel (05TA085-6) CRT

Circuit diagram for the CRT panel of the 05TA085-6 main board.

Main Panel (05TA085-6): SCART

Circuit diagram for SCART connections on the 05TA085-6 main board.

Layout Main Panel (05TA085-6) Top Side

Top-side component layout of the 05TA085-6 main board.

Layout Main Panel (05TA085-6) Bottom Side

Bottom-side component layout of the 05TA085-6 main board.

Side I/O Panel (21PT5421 only)

Circuit diagram for the side I/O panel connections.

Layout Side I/O Panel Top Side

Top-side component layout of the side I/O panel.

8. Alignments

8.1 Hardware Alignments

Procedures for physical adjustments like voltage and geometry.

8.1.1 System Voltage Adjustment

Procedure for adjusting the V100 potentiometer for 110V DC.

8.2 Software Alignments/Settings

Accessing service mode for software-based alignments.

8.2.3 G2 Adjust Menu

Procedure for adjusting the G2 control for picture display.

8.2.5 Tuner / IF

Alignment procedure for the tuner and intermediate frequency stages.

8.2.6 AGC Adjustment

Procedure for adjusting the Automatic Gain Control parameter.

9. Circuit Descriptions, Abbreviation List, and IC Data Sheets

9.1 Basic Hardware Descriptions

Detailed descriptions of key hardware components like MCUs.

9.3 Abbreviation List

Alphabetical list of abbreviations used in the manual.

9.2 Functional Description

Explanation of how the TV system's functions operate.

9.2.3 AFC

Description of the Automatic Frequency Control system.

9.2.4 Picture

Controls for picture settings like brightness, contrast, and screen format.

9.2.5 Sound

Details on sound modes, volume control, and mute function.

9.2.6 Peri-TV

Description of external input modes like SCART (EXT) and AV.

9.4 IC Data Sheets

Block diagrams and pin layouts for integrated circuits.

9.4.1 Diagram A1, ST24C16 (IC I201)

Data sheet for the ST24C16 EEPROM IC.

9.4.2 Diagram A1, ST92195CD

Data sheet for the ST92195CD microcontroller IC.

9.4.3 Diagram A2, STV224X

Data sheet for the STV224X video processor IC.

9.4.4 Diagram A3, TDA2822

Data sheet for the TDA2822 audio amplifier IC.

9.4.5 Diagram A4, IC1QS01

Data sheet for the IC1QS01 power supply controller IC.

9.4.6 Diagram A4, LM317

Data sheet for the LM317 voltage regulator IC.

9.4.7 Diagram A4, LM7805

Data sheet for the LM7805 voltage regulator IC.

9.4.8 Diagram A5, TDA1771

Data sheet for the TDA1771 deflection amplifier IC.

10. Spare Parts List

11. Revision List

11.1 Manual xxxx xxx xxxxx.0

Details of the first release of the service manual.

11.2 Manual xxxx xxx xxxxx.1

Information on revisions and additions made in manual version 1.