Philips l04a ab Service Manual

Colour Television Chassis

L04A

E_14770_058.eps

2314 04

Contents Page Contents Page

1. Technical Specifications, Connections, and Chassis Overview 2

2. Safety Instructions, Warnings, and Notes 4

3. Directions for Use 6

4. Mechanical Instructions 13

5. Service Modes, Error Codes and Fault Finding 15

6. Block Diagrams, Testpoint Overviews, and

Waveforms

Wiring Diagram 25 Block Diagram Supply and Deflection 26 Testpoint Overview Mono Carrier 27 Block Diagram Video 28 Testpoint Overview Trident, Trident Interface, Front Interface & CRT Panel 29 Block Diagram Audio/Control 30 I2C and Supply Voltage Overview 31

7. Circuit Diagrams and PWB Layouts Diagram PWB Mono Carrier: Power Supply (A1) 32 41-46 Mono Carrier: Line Deflection (A2) 33 41-46 Mono Carrier: Tuner IF (A3) 34 41-46 Mono Carrier: Hercules (A4) 35 41-46 Mono Carrier: Features & Connectivities (A5) 36 41-46 Mono Carrier: Class D - Audio Amp. (Res) (A6) 37 41-46 Mono Carrier: Audio Amplifier (A7) 38 41-46 Mono Carrier: Rear I/O Cinch (A8) 39 41-46 Mono Carrier: Front Control (A9) 40 41-46 Mono Carrier: DVD Power Supply (A10) 40 41-46 CRT Panel (B1) 47 49-50 CRT Panel: Eco Scavem (B2) 48 49-50 Side AV + Headphone Panel (D) 51 52 Top Control Panel (PVO+) (E) 53 54 Front Interface Panel (With Top Control) (J) 55 56 Front Interface Panel (No Top Control) (J) 57 57 Trident Panel: DPTV SDP (T1) 58 63-64

Copyright 2005 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.

Trident Panel: Y Pb Pr Input (Reserved) (T2) 59 63-64 Trident Panel: ADC (T3) 60 63-64 Trident Panel: SDRAM (T4) 61 63-64 Trident Panel: Display & Processing (T5) 62 63-64 Trident Interface Panel (TI) 65 66

8. Alignments 67

9. Circuit Descriptions, List of Abbreviations, and IC Data Sheets 73 Abbreviation list 81 IC Data Sheets 82

10. Spare Parts List 84

11. Revision List 89

Published by JH 0563 Service PaCE Printed in the Netherlands Subject to modification EN 3122 785 14772

EN 2 L04A AB1.

Technical Specifications, Connections, and Chassis Overview

1. Technical Specifications, Connections, and Chassis Overview

Index of this chapter:

1.1 Introduction

1.2 Technical Specifications

1.3 Connections

1.4 Chassis Overview

1.1 Introduction

• Described specifications are valid for the whole product range.

• Figures below can deviate slightly from the actual situation, due to different set executions.

1.2 Technical Specifications

1.2.1 Vision

Display type : DV-CRT- RF Screen size : 29” (72 cm), 4:3

: 34” (85 cm), 4:3 Tuning system : PLL TV Colour systems : NTSC M (3.58-4.5)

: PAL B/G, B/H, D/K, I Video playback : NTSC 3.58, 4.43

: PAL 4.43 Channel selections : 100 presets

: UVSH Aerial input : 75 ohm, Coax

:IEC-type

1.2.2 Sound

Sound systems : 2CS BG, D/K,

: FM/FM (5.5-5.74) (B/

G),

: FM/FM (6.5-6.74)

(China),

: NICAM B/G (5.5-

5.85),

: NICAM D/K (6.5-5.85)

Hung, : NICAM I (6.0-6.52) : AV stereo

Maximum power : 2x10/ 2x5 W_rms

(int.)

1.2.3 Miscellaneous

1.3.1 Side Connections

SIDE I/O

S-Video (optional)

Video

L Audio R

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Figure 1-1 Side I/O connections

SVHS: Y/C - In (Hosiden) (optional)

1 - Ground Gnd H 2 - Ground Gnd H 3 - Y 1 V_pp / 75 ohm j 4 - C 0.3 V_pp / 75 ohm j

Audio / Video In

Ye - Video (CVBS) 1 V_pp / 75 ohm jq Wh - Audio - L 0.5 V_rms / 10 kohm jq Rd - Audio - R 0.5 V_rms / 10 kohm jq Bk - Headphone 8 - 600 Ohm / 4 mW ot

1.3.2 Rear Connections

75 Ohm

VIDEO

L/Mono

AUDIO

MONITOR

OUT

COMPONENT VIDEO INPUT

AV1

AV2

Figure 1-2 Rear connections

Aerial In

- F-type Coax, 75 ohm D

Monitor Out

Ye - Video (CVBS) 1 V_pp / 75 ohm kq Wh - Audio - L 0.5 V_rms / 1 kohm kq Rd - Audio - R 0.5 V_rms / 1 kohm kq

S-VIDEO

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110204

Power supply:

- Mains voltage : 150-276 V_ac

- Mains frequency : 50 / 60 Hz

Ambient conditions:

- Temperature range : +5 to +40 deg. C

- Maximum humidity : 90 % R.H.

Power consumption

- Normal operation : 110 W (29”)

- Standby : < 1 W

1.3 Connections

Note: The following connector colour abbreviations are used

(acc. to DIN/IEC 757): Bk= Black, Bu= Blue, Gn= Green, Gy= Grey, Rd= Red, Wh= White, Ye= Yellow.

Cinch: In

Ge - Y 0.7 V_pp / 75 ohm jq Bu - Pb 0.7 V_pp / 75 ohm jq Rd - Pr 0.7 V_pp / 75 ohm jq

AV1 In

Ye - Video (CVBS) 1 V_pp / 75 ohm jq Wh - Audio - L 0.5 V_rms / 10 kohm jq Rd - Audio - R 0.5 V_rms / 10 kohm jq

AV2 In

Ye - Video (CVBS) 1 V_pp / 75 ohm jq Wh - Audio - L 0.5 V_rms / 10 kohm jq Rd - Audio - R 0.5 V_rms / 10 kohm jq

AV2 In (SVHS)

1 - Ground GND H 2 - Ground GND H 3 - Y 1 V_pp / 75 ohm jq 4 - C 0.3 V_pp / 75 ohm jq

Technical Specifications, Connections, and Chassis Overview

1.4 Chassis Overview

EN 3L04A AB 1.

CRT

ECO

SCAVEM

SIDE AV PANEL +

HEADPHONE

DPTV SDP

Y Pb Pr INPUT

RGB INPUT

ADC

SDRAM

DISPLAY &

PROCESSING

TRIDENT INTERFACE PANEL

CRT

ECO

SCAVEM

CRT PANEL

TRIDENT PANEL

CRT PANEL

Figure 1-3 PWB location without Top Control

MONO

CARRIER

FRONT INTERFACE PANEL

POWER SUPPLY

LINE & FRAME DEFLECTION

TUNER IF

HERCULES

FEATURES & CONNECTIVITIES

CLASS D AUDIO AMPLIFIER

AUDIO AMPLIFIER

REAR I/O CINCH

FRONT CONTROL

DVD POWER SUPPLY

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TOP CONTROL PANEL

FRONT INTERFACE PANEL

A10

010904

SIDE AV PANEL +

HEADPHONE

DPTV SDP

Y Pb Pr INPUT

RGB INPUT

ADC

SDRAM

DISPLAY &

PROCESSING

TRIDENT INTERFACE PANEL

TRIDENT PANEL

Figure 1-4 PWB location with Top Control

MONO

CARRIER

POWER SUPPLY

LINE & FRAME DEFLECTION

TUNER IF

HERCULES

FEATURES & CONNECTIVITIES

CLASS D AUDIO AMPLIFIER

AUDIO AMPLIFIER

REAR I/O CINCH

FRONT CONTROL

DVD POWER SUPPLY

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A10

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EN 4 L04A AB2.

Safety Instructions, Warnings, and Notes

2. Safety Instructions, Warnings, and Notes

Index of this chapter:

2.1 Safety Instructions

2.2 Warnings

2.3 Notes

2.1 Safety Instructions

Safety regulations require that during a repair:

• Connect the set to the Mains (AC Power) via an isolation transformer (> 800 VA).

• Replace safety components, indicated by the symbol h, only by components identical to the original ones. Any other component substitution (other than original type) may increase risk of fire or electrical shock hazard.

Safety regulations require that after a repair, the set must be returned in its original condition. Pay in particular attention to the following points:

• Route the wire trees correctly and fix them with the mounted cable clamps.

• Check the insulation of the Mains (AC Power) lead for external damage.

• Check the strain relief of the Mains (AC Power) cord for proper function.

• Check the electrical DC resistance between the Mains (AC Power) plug and the secondary side (only for sets which have a Mains (AC Power) isolated power supply):

1. Unplug the Mains (AC Power) cord and connect a wire

between the two pins of the Mains (AC Power) plug.

2. Set the Mains (AC Power) switch to the "on" position

(keep the Mains (AC Power) cord unplugged!).

3. Measure the resistance value between the pins of the

Mains (AC Power) plug and the metal shielding of the tuner or the aerial connection on the set. The reading should be between 4.5 Mohm and 12 Mohm.

4. Switch "off" the set, and remove the wire between the

two pins of the Mains (AC Power) plug.

• Check the cabinet for defects, to avoid touching of any inner parts by the customer.

2.2 Warnings

Service Default Mode (see chapter 5) with a colour bar signal and stereo sound (L: 3 kHz, R: 1 kHz unless stated otherwise) and picture carrier at 475.25 MHz for PAL, or

61.25 MHz for NTSC (channel 3).

• Where necessary, measure the waveforms and voltages

with (D) and without (E) aerial signal. Measure the voltages in the power supply section both in normal operation (G) and in stand-by (F). These values are indicated by means of the appropriate symbols.

• The semiconductors indicated in the circuit diagram and in the parts lists, are interchangeable per position with the semiconductors in the unit, irrespective of the type indication on these semiconductors.

2.3.2 Schematic Notes

• All resistor values are in ohms and the value multiplier is often used to indicate the decimal point location (e.g. 2K2 indicates 2.2 kohm).

• Resistor values with no multiplier may be indicated with either an "E" or an "R" (e.g. 220E or 220R indicates 220 ohm).

• All capacitor values are given in micro-farads (µ= x10 nano-farads (n= x10

• Capacitor values may also use the value multiplier as the decimal point indication (e.g. 2p2 indicates 2.2 pF).

• An "asterisk" (*) indicates component usage varies. Refer to the diversity tables for the correct values.

• The correct component values are listed in the Spare Parts List. Therefore, always check this list when there is any doubt.

2.3.3 Rework on BGA (Ball Grid Array) ICs

General

Although (LF)BGA assembly yields are very high, there may still be a requirement for component rework. By rework, we mean the process of removing the component from the PWB and replacing it with a new component. If an (LF)BGA is removed from a PWB, the solder balls of the component are deformed drastically so the removed (LF)BGA has to be discarded.

-9

), or pico-farads (p= x10

-12

-6

• All ICs and many other semiconductors are susceptible to

electrostatic discharges (ESD w). Careless handling during repair can reduce life drastically. Make sure that, during repair, you are connected with the same potential as the mass of the set by a wristband with resistance. Keep components and tools also at this same potential. Available ESD protection equipment: – Complete kit ESD3 (small tablemat, wristband,

connection box, extension cable and earth cable) 4822 310 10671.

– Wristband tester 4822 344 13999.

• Be careful during measurements in the high voltage section.

• Never replace modules or other components while the unit is switched "on".

• When you align the set, use plastic rather than metal tools. This will prevent any short circuits and the danger of a circuit becoming unstable.

2.3 Notes

2.3.1 General

• Measure the voltages and waveforms with regard to the chassis (= tuner) ground (H), or hot ground (I), depending on the tested area of circuitry. The voltages and waveforms shown in the diagrams are indicative. Measure them in the

Device Removal

As is the case with any component that, it is essential when removing an (LF)BGA, the board, tracks, solder lands, or surrounding components are not damaged. To remove an (LF)BGA, the board must be uniformly heated to a temperature close to the reflow soldering temperature. A uniform temperature reduces the chance of warping the PWB. To do this, we recommend that the board is heated until it is certain that all the joints are molten. Then carefully pull the component off the board with a vacuum nozzle. For the appropriate temperature profiles, see the IC data sheet.

Area Preparation

When the component has been removed, the vacant IC area must be cleaned before replacing the (LF)BGA. Removing an IC often leaves varying amounts of solder on the mounting lands. This excessive solder can be removed with either a solder sucker or solder wick. The remaining flux can be removed with a brush and cleaning agent. After the board is properly cleaned and inspected, apply flux on the solder lands and on the connection balls of the (LF)BGA. Note: Do not apply solder paste, as this has shown to result in problems during re-soldering.

Device Replacement

The last step in the repair process is to solder the new component on the board. Ideally, the (LF)BGA should be

Safety Instructions, Warnings, and Notes

EN 5L04A AB 2.

aligned under a microscope or magnifying glass. If this is not possible, try to align the (LF)BGA with any board markers. To reflow the solder, apply a temperature profile according to the IC data sheet. So as not to damage neighbouring components, it may be necessary to reduce some temperatures and times.

More Information

For more information on how to handle BGA devices, visit this URL: www.atyourservice.ce.philips.com (needs subscription, not available for all regions). After login, select “Magazine”, then go to “Workshop Information”. Here you will find Information on how to deal with BGA-ICs.

2.3.4 Lead Free Solder

Philips CE is going to produce lead-free sets (PBF) from

1.1.2005 onwards.

Figure 2-1 Lead-free logo

This sign normally has a diameter of 6 mm, but if there is less space on a board also 3 mm is possible.

be available till the end of the service period. For the repair of such sets nothing changes.

In case of doubt whether the board is lead-free or not (or with mixed technologies), you can use the following method:

• Always use the highest temperature to solder, when using SAC305 (see also instructions below).

• De-solder thoroughly (clean solder joints to avoid mix of two alloys).

Caution: For BGA-ICs, you must use the correct temperatureprofile, which is coupled to the 12NC. For an overview of these profiles, visit the website www.atyourservice.ce.philips.com (needs subscription, but is not available for all regions) You will find this and more technical information within the "Magazine", chapter "Workshop information". For additional questions please contact your local repair help desk.

2.3.5 Practical Service Precautions

• It makes sense to avoid exposure to electrical shock. While some sources are expected to have a possible dangerous impact, others of quite high potential are of limited current and are sometimes held in less regard.

• Always respect voltages. While some may not be dangerous in themselves, they can cause unexpected reactions that are best avoided. Before reaching into a powered TV set, it is best to test the high voltage insulation. It is easy to do, and is a good service precaution.

Regardless of this logo (is not always present), one must treat all sets from this date onwards according to the following rules.

Due to lead-free technology some rules have to be respected by the workshop during a repair:

• Use only lead-free soldering tin Philips SAC305 with order code 0622 149 00106. If lead-free solder paste is required, please contact the manufacturer of your soldering equipment. In general, use of solder paste within workshops should be avoided because paste is not easy to store and to handle.

• Use only adequate solder tools applicable for lead-free soldering tin. The solder tool must be able – To reach at least a solder-tip temperature of 400°C. – To stabilise the adjusted temperature at the solder-tip. – To exchange solder-tips for different applications.

• Adjust your solder tool so that a temperature around 360°C

- 380°C is reached and stabilised at the solder joint. Heating time of the solder-joint should not exceed ~ 4 sec. Avoid temperatures above 400°C, otherwise wear-out of tips will rise drastically and flux-fluid will be destroyed. To avoid wear-out of tips, switch “off” unused equipment or reduce heat.

• Mix of lead-free soldering tin/parts with leaded soldering tin/parts is possible but PHILIPS recommends strongly to avoid mixed regimes. If not to avoid, clean carefully the solder-joint from old tin and re-solder with new tin.

• Use only original spare-parts listed in the Service-Manuals. Not listed standard material (commodities) has to be purchased at external companies.

• Special information for lead-free BGA ICs: these ICs will be delivered in so-called "dry-packaging" to protect the IC against moisture. This packaging may only be opened short before it is used (soldered). Otherwise the body of the IC gets "wet" inside and during the heating time the structure of the IC will be destroyed due to high (steam)pressure inside the body. If the packaging was opened before usage, the IC has to be heated up for some hours (around 90°C) for drying (think of ESD-protection!). Do not re-use BGAs at all!

• For sets produced before 1.1.2005, containing leaded soldering tin and components, all needed spare parts will

EN 6 L04A AB3.

3. Directions for Use

You can also download this information from the following websites:

http://www.philips.com/support http://www.p4c.philips.com

Directions for Use

EN 7L04A AB 3.

EN 8 L04A AB3.

Directions for Use

EN 9L04A AB 3.

EN 10 L04A AB3.

Directions for Use

EN 11L04A AB 3.

EN 12 L04A AB3.

Directions for Use

4. Mechanical Instructions

Mechanical Instructions

EN 13L04A AB 4.

Index of this chapter:

4.1 Set Disassembly

4.2 Service Position

4.3 Assies/Panels Removal

4.4 Set Re-assembly

Note: Figures below can deviate slightly from the actual situation, due to different set executions.

4.1 Set Disassembly

Warning: Be sure to disconnect the AC power from the set

before opening it.

4.1.1 Rear Cover

1. Remove all fixation screws of the rear cover (do not forget the screws that hold the rear connection panel).

2. Pull the rear cover backwards to remove it.

4.2 Service Position

Before placing the Mono Carrier in its service position, remove the Front Interface assy/panel (see paragraph “Front Interface Assy/Panel removal”), the Side AV assy/panel (see paragraph “Side AV Assy/Panel removal”) and the Trident assy/panel (see paragraph “Trident Assy/Panel removal”).

4.3 Assies/Panels Removal

4.3.1 Front assy/panel Removal

Figure 4-2 Front assy/panel removal

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Figure 4-1 Service position Mono Carrier

1. Disconnect the degaussing coil.

2. Release the two fixation clamps (at the mid left and mid right side of the bracket), and remove the bracket from the bottom tray, by pulling it backwards.

3. Turn the chassis tray 90 degrees counter clockwise.

4. Move the panel bracket somewhat to the left and flip it 90 degrees, with the components towards the CRT.

5. Turn the panel bracket with the rear I/O toward the CRT.

6. Place the hook of the tray in the fixation hole of the cabinet bottom and secure it.

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Figure 4-3 Front panel detail

1. Remove the complete module from the bottom plate, by pulling the fixation clamp [1] left on the bracket (see Front assy/panel removal), while sliding the module to the left. Note: this clamp is difficult to access.

2. Release the two fixation clamps at the side of the bracket, and lift the panel out of the bracket (it hinges at one side).

EN 14 L04A AB4.

Mechanical Instructions

4.3.2 Side AV Assy/Panel Removal

Figure 4-4 AV assy/panel removal

Remove the IO bracket by pulling the fixation clamp [1] while sliding it away from the front side.

4.3.3 Trident assy/panel Removal

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010904

1. Remove screw [1] at the bottom of the Trident bracket.

2. To remove bracket pull both fixation clamps [2] while lifting at the opposite side near the heatsink [3].

3. To remove shielding bracket push fixation clamps [4] and pull at the top.

4. To remove the Trident assy from the remaining bracket release the two fixation clamps [5] (see Trident assy)

4.4 Set Re-assembly

To re-assemble the whole set, do all processes in reverse order.

Note: before you mount the rear cover, perform the following checks:

1. Check whether the AC power cord is mounted correctly in its guiding brackets.

2. Check whether all cables are replaced in their original position

Figure 4-5 AV assy/panel removal

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Figure 4-6 Trident assy

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Service Modes, Error Codes and Fault Finding

5. Service Modes, Error Codes and Fault Finding

EN 15L04A AB 5.

Index of this chapter:

5.1 Test Points

5.2 Service Modes

5.3 Problems and Solving Tips Related to CSM

5.4 ComPair

5.5 Error Codes

5.6 The Blinking LED Procedure

5.7 Protections

5.8 Fault Finding and Repair Tips

5.1 Test Points

The chassis is equipped with test points printed on the circuit board assemblies. These test points refer to the functional blocks:

Table 5-1 Test point overview

Test point Circuit Diagram

I511, I531, I513, I519, F508, I516, I533, F552, I565, I545, F563, F561, F573, F536, F537, F564

F402, F401, F412, F468, F467, F418, F414, F460, F461, I468, F452, F453, F455, I462, F458, F459

I001, I002, F003, F004 Tuner IF A3

F201, F203, F205 Hercules A4

N.A Features Connectivities A5

I951, I952, F952, F955 Audio Amplifier A7

F692 Front Control A9

F331, F332, F334, F333, F338, F339, F341, F354, F353

F361, F362, F381, F382 ECO Scavem B2

I206, I208, I209, I204, I201, I202 Trident interface board TI

F001, F002, F003, F004 DPTV T1

F005, F006, F007, F008 YpbPr input T2

F009, F010, F011 ADC T3

N.A SDRAM T4

F047,F012,F022,F019,F023,F024, F048,F038,F039,F040,F025,F020, F021,F013,F014,F026,F027,F016, F015,F017,F018,F041,F049,F042, F043,F050,F044,F045,F046

Power supply A1

Line Deflection A2

CRT Panel B1

Display & Processing T5

Note: Not all listed test points are measured.

Perform measurements under the following conditions:

• Television set in Service Default Alignment Mode.

• Video input: Colour bar signal.

• Audio input: 3 kHz left channel, 1 kHz right channel.

5.2 Service Modes

Service Default mode (SDM) & Service Alignment Mode (SAM) offers several features for the service technician, while the Customer Service Mode (CSM) is used for communication between the call centre and the customer.

This chassis also offers the option of using ComPair, a hardware interface between a computer and the TV chassis. It offers the abilities of structured troubleshooting, error code reading, and software version readout for all these chassis. Minimum requirements for ComPair: a Pentium processor, a Windows OS, and a CD-ROM drive (see "ComPair" section).

Table 5-2 Software cluster overview

SW Cluster SW name Hercules Diversity 12 NC Checksum ROM Sizs Special Features

L4TAN1 L04AT1 x.y TDA12010H 935274424557 0472BA5B 128K CC.NONTXT+MULTISND

Abbreviations: CC = Closed CaptionNONTXT= No teletextMULTISND=2CS BG, 2CS D/K, FM/FM (5.5-5.74) (B/G), FM/FM (6.5-6.74) (China), NICAM B/G (5.5-5.85), NICAM D/K (6.5-5.85) (Hung), NICAM I (6.0-6.52)

EN 16 L04A AB5.

Service Modes, Error Codes and Fault Finding

5.2.1 Service Default Mode (SDM)

Purpose

• To create a predefined setting for measurements to be made.

• To override software protections.

• To start the blinking LED procedure.

Specifications

• Tuning frequency: – For sets with PLL tuning AP-NTSC: Channel 3 is tuned

(61.25 MHz).

– For sets with PLL tuning AP-PAL: 475.25 MHz is tuned

• Colour system: – For AP-NTSC: NTSC – For AP-PAL: PAL B/G

• All picture settings at 50% (brightness, colour contrast, hue).

• Bass, treble and balance at 50 %; volume at 25 %.

• All service-unfriendly modes (if present) are disabled. The service unfriendly modes are: – Timer / Sleep timer. – Child / parental lock. –Blue mute. – Auto shut off (when no 'IDENT' video signal is received

for 15 minutes). – Skipping of non-favourite presets / channels. – Auto-storage of personal presets. – Auto user menu time-out. – Auto Volume Levelling (AVL).

How to enter

To enter SDM, use one of the following methods:

• Press the following key sequence on the remote control transmitter: '0 6 2 5 9 6' directly followed by the 'MENU' button (do not allow the display to time out between entries while keying the sequence).

• Short jumper wires 9252 and 9275 on the family board (see Fig. 8-1) and apply mains. Then press the power button (remove the short after start-up). Caution: Entering SDM by shorting wires 9252 and 9275 will override the +8Vprotection. Do this only for a short period. When doing this, the service-technician must know exactly what he is doing, as it could damage the television set.

• Or via ComPair (with the ComPair ‘Tools’, it should be possible to enter SDM via the ComPair interface).

After entering SDM, the following screen is visible, with SDM in the upper right corner of the screen to indicate that the television is in Service Default Alignment Mode.

How to navigate

Use one of the following methods:

• When you press the MENU button on the remote control, the set will switch on the normal user menu in the SDM mode.

• On the TV, press and hold the ‘VOLUME down’ and press the ‘CHANNEL down’ for a few seconds, to switch from SDM to SAM and reverse.

How to exit

Switch the set to STANDBY by pressing the POWER button on the remote control transmitter or the television set. If you turn the television set off by removing the Mains (i.e., unplugging the television) without using the POWER button, the television set will remain in SDM when mains is re-applied, and the error buffer is not cleared.

5.2.2 Service Alignment Mode (SAM)

Purpose

• To change option settings.

• To display / clear the error code buffer.

• To perform alignments.

Specifications

• Run timer (maximum five digits displayed)

• Software version, Error & Option Bytes display

• Clear error buffer.

• Option settings

• AKB switching

• Software alignments (Tuner, 2 Tuner PIP, White Tone, Geometry & Audio)

• NVM Editor

• ComPair Mode switching

How to enter

To enter SAM, use one of the following methods:

• Press the following key sequence on the remote control transmitter: '0 6 2 5 9 6' directly followed by the “On Screen Display icon “i +” button (do not allow the display to time out between entries while keying the sequence).

• Or via ComPair.

After entering SAM, the following screen is visible, with SAM in the upper right corner of the screen to indicate that the television is in Service Alignment Mode.

01535 L04AT 1.0 SAM ERR 0 0 0 0 0

01535 L04AT1 1.0 SDM ERR 0 0 0 0 0 OP 185 141 128 033 252 136 000

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Figure 5-1 SDM menu

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OP 185 141 128 033 252 136 000

. Clear Clear ? . Options . AKB On . Tuner . White Tone . Geometry . Audio . NVM Editor . ComPair Mode off

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Figure 5-2 SAM menu

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Service Modes, Error Codes and Fault Finding

EN 17L04A AB 5.

Menu explanation

1. LLLLL. This represents the run timer. The run timer counts normal operation hours, but does not count standby hours (maximum four digits displayed).

2. AAABCD-X.Y. This is the software identification of the main microprocessor: – A = the project name (L04). – B = the region: E= Europe, A= Asia Pacific, U= NAFTA,

L= LATAM.

– C = the software diversity:

• Europe: T = 1 page TXT, F = Full TXT, V = Voice control.

• LATAM and NAFTA: N = Stereo non-dBx, S = Stereo dBx.

• Asian Pacific: F = Full TXT, N = non TXT, C = NTSC.

• ALL regions: M = mono, D = DVD, Q = Mk2.

– D = the language cluster number. – X = the main software version number (updated with a

major change that is incompatible with previous versions).

– Y = the sub software version number (updated with a

minor change that is compatible with previous versions).

3. SAM. Indication of the Service Alignment Mode.

4. Error Buffer. Shows all errors detected since the last time the buffer was erased. Five errors possible.

5. Option Bytes. Used to set the option bytes. See 'Options' in the Alignments section for a detailed description. Seven codes are possible.

6. Clear. Erases the contents of the error buffer. Select the CLEAR menu item and press the MENU RIGHT key. The content of the error buffer is cleared.

7. Options. Used to set the option bits. See 'Options' in the Alignments section for a detailed description.

8. AKB. Used to disable (Off) or enable (On) the 'black current loop' (AKB = Auto Kine Bias).

9. Tuner. Used to align the tuner. See 'Tuner' in the Alignments section for a detailed description.

10. 2 Tuner PIP. Used to align the tuner PIP (optional)

11. White Tone. Used to align the white tone. See 'White Tone' in the Alignments section for a detailed description.

12. Geometry. Used to align the geometry settings of the television. See 'Geometry' in the Alignments section for a detailed description.

13. Audio. No audio alignment is necessary for this television set.

14. NVM Editor. Used to change the NVM data in the

television set.

15. ComPaIr Mode. Used to switch on the television to ISP mode (for uploading software)

How to navigate

• In SAM, select menu items with the MENU UP/DOWN keys on the remote control transmitter. The selected item will be highlighted. When not all menu items fit on the screen, use the MENU UP/DOWN keys to display the next / previous menu items.

• With the MENU LEFT/RIGHT keys, it is possible to: – Activate the selected menu item. – Change the value of the selected menu item. – Activate the selected submenu.

• In SAM, when you press the MENU button twice, the set will switch to the normal user menus (with the SAM mode still active in the background). To return to the SAM menu press the MENU or STATUS/EXIT button.

• When you press the MENU key in while in an SDAM submenu, you will return to the previous menu.

How to store SAM settings

To store settings changed in SAM leave the top level SAM menu by using the POWER button on the remote control transmitter or the television set.

How to exit

Switch the set to STANDBY by pressing the POWER button on the remote control transmitter or the television set. If you turn the television set off by removing the mains (i.e., unplugging the television) without using the POWER button, the television set will remain in SAM when mains is re-applied, and the error buffer is not cleared.

5.2.3 Customer Service Mode (CSM)

Purpose

The Customer Service Mode shows error codes and information on the TV operation settings. The call centre can instruct the customer to enter CSM by telephone and read off the information displayed. This helps the call centre to diagnose problems and failures in the TV set before making a service call. The CSM is a read-only mode; therefore, modifications are not possible in this mode.

How to enter

To enter CSM, press the following key sequence on the remote control transmitter: '1 2 3 6 5 4' (do not allow the display to time out between entries while keying the sequence).

Upon entering the Customer Service Mode, the following screen will appear:

1 01535 L04T1 1.0 CSM 2 CODES 0 0 0 0 0 3 OP 185 141 128 033 252 136 000 4 nnXXnnnn/nnX 5 P3C-1 6 NOT TUNED 7 PAL 8 STEREO 9 CO 50 CL 50 BR 50 HU 0 0 AVL Off BS 50

E_14770_051.eps

Figure 5-3 CSM menu

Menu explanation

1. Indication of the service mode (CSM = Customer Service Mode).

2. Reserved item.

3. Software identification of the main microprocessor (see 'Service Default Alignment Mode' for an explanation)

4. Reserved item for P3C call centres (AKBS stands for Advanced Knowledge Base System).

5. Indicates the type of TV system or whether or not the television is receiving an 'IDENT' signal on the selected source. If no 'IDENT' signal is detected, the display will read 'NOT TUNED'

6. Displays the last five errors detected in the error code buffer.

How to exit

To exit CSM, use one of the following methods:

• Press the MENU, STATUS/EXIT, or POWER button on the remote control transmitter.

• Press the POWER button on the television set.

010904

EN 18 L04A AB5.

Service Modes, Error Codes and Fault Finding

5.3 Problems and Solving Tips Related to CSM

5.3.1 Picture Problems

Note: The problems described below are all related to the TV

settings. The procedures used to change the value (or status) of the different settings are described.

Picture too dark or too bright

If:

• The picture improves when you have press the AUTO PICTURE button on the remote control transmitter, or

• The picture improves when you enter the Customer Service Mode

Then:

1. Press the AUTO PICTURE button on the remote control transmitter repeatedly (if necessary) to choose PERSONAL picture mode.

2. Press the MENU button on the remote control transmitter. This brings up the normal user menu.

3. In the normal user menu, use the MENU UP/DOWN keys to highlight the PICTURE sub menu (if necessary).

4. Press the MENU LEFT/RIGHT keys to enter the PICTURE sub menu.

5. Use the MENU UP/DOWN keys (if necessary) to select BRIGHTNESS.

6. Press the MENU LEFT/RIGHT keys to increase or decrease the BRIGHTNESS value.

7. Use the MENU UP/DOWN keys to select PICTURE.

8. Press the MENU LEFT/RIGHT keys to increase or decrease the PICTURE value.

9. Press the MENU button on the remote control transmitter twice to exit the user menu.

10. The new PERSONAL preference values are automatically stored.

White line around picture elements and text

If: The picture improves after you have pressed the AUTO PICTURE button on the remote control transmitter

Then:

1. Press the AUTO PICTURE button on the remote control transmitter repeatedly (if necessary) to choose PERSONAL picture mode.

2. Press the MENU button on the remote control transmitter. This brings up the normal user menu.

3. In the normal user menu, use the MENU UP/DOWN keys to highlight the PICTURE sub menu (if necessary).

4. Press the MENU LEFT/RIGHT keys to enter the PICTURE sub menu.

5. Use the MENU UP/DOWN keys to select SHARPNESS.

6. Press the MENU LEFT key to decrease the SHARPNESS value.

7. Press the MENU button on the remote control transmitter twice to exit the user menu.

8. The new PERSONAL preference value is automatically stored.

Snowy picture

To enter CSM, press the following key sequence on the remote control transmitter: '123654' (do not allow the display to time out between entries while keying the sequence).

Check CSM line 5. If this line reads 'Not Tuned,' check the following:

• Antenna not connected. Connect the antenna.

• No antenna signal or bad antenna signal. Connect a proper antenna signal.

• The tuner is faulty (in this case line 6, the Error Buffer line, will contain error number 10). Check the tuner and replace/ repair the tuner if necessary.

Black and white picture

If:

• The picture improves after you have pressed the AUTO PICTURE button on the remote control transmitter

Then:

1. Press the AUTO PICTURE button on the remote control transmitter repeatedly (if necessary) to choose PERSONAL picture mode.

2. Press the MENU button on the remote control transmitter. This brings up the normal user menu.

3. In the normal user menu, use the MENU UP/DOWN keys to highlight the PICTURE sub menu (if necessary).

4. Press the MENU LEFT/RIGHT keys to enter the PICTURE sub menu.

5. Use the MENU UP/DOWN keys to select COLOR.

6. Press the MENU RIGHT key to increase the COLOR value.

7. Press the MENU button on the remote control transmitter twice to exit the user menu.

8. The new PERSONAL preference value is automatically stored.

Menu text not sharp enough

If:

• The picture improves after you have pressed the AUTO PICTURE button on the remote control transmitter.

Then:

1. Press the AUTO PICTURE button on the remote control transmitter repeatedly (if necessary) to choose PERSONAL picture mode.

2. Press the MENU button on the remote control transmitter. This brings up the normal user menu.

3. In the normal user menu, use the MENU UP/DOWN keys to highlight the PICTURE sub menu (if necessary).

4. Press the MENU LEFT/RIGHT keys to enter the PICTURE sub menu.

5. Use the MENU UP/DOWN keys to select PICTURE.

6. Press the MENU LEFT key to decrease the PICTURE value.

7. Press the MENU button on the remote control transmitter twice to exit the user menu.

8. The new PERSONAL preference value is automatically stored.

5.4 ComPair

5.4.1 Introduction

ComPair (Computer Aided Repair) is a service tool for Philips Consumer Electronics products. ComPair is a further development of the European DST (special remote control transmitter for Service), which allows faster and more accurate diagnostics. ComPair has three big advantages:

• ComPair helps you to get an understanding on how to repair the chassis in a short time, by guiding you systematically through the repair procedures.

• ComPair allows very detailed diagnostics (on I2C level) and is therefore capable of accurately indicating problem areas. You do not have to know anything about I2C commands yourself because ComPair takes care of this.

• ComPair speeds up the repair time since it can automatically communicate with the chassis (when the microprocessor is working) and all repair information is directly available. When ComPair is installed together with the Force electronic manual of the L01.1U AC chassis, schematics and CBAs are only a mouse-click away.

Service Modes, Error Codes and Fault Finding

EN 19L04A AB 5.

5.4.2 Specifications

ComPair consists of a Windows based faultfinding program and an interface box between PC and the product. The ComPair interface box is connected to the PC via a serial or RS232 cable. In the case of the L01 chassis, the ComPair interface box and the TV communicate via a bi-directional service cable via the service connector (connector 0267).

The ComPair faultfinding program is able to determine the problem of the television set. ComPair can gather diagnostic information in two ways:

• Automatic (by communication with the television): ComPair can automatically read the contents of the entire error buffer. Diagnosis is done on I2C level. ComPair can access the I2C bus of the television. ComPair can send and receive I2C commands to the microprocessor of the television. In this way, it is possible for ComPair to communicate (read and write) to devices on the I2C busses of the television set.

• Manually (by asking questions to the services): Automatic diagnosis is only possible if the microprocessor of the television is working correctly, and only to a certain extent. When this is not the case, ComPair will guide you through the faultfinding tree by asking you questions (for example; Does the screen give a picture? Click on the correct answer: YES / NO) and showing you examples (for example; Measure test-point I7 and click on the correct oscillogram you see on the oscilloscope). You can answer by clicking on a link (for example, text or a waveform picture) that will bring you to the next step in the faultfinding process.

By a combination of automatic diagnostics and an interactive question and answer procedure, ComPair will enable you to find most problems in a fast and effective way.

Beside fault finding, ComPair provides some additional features like:

• Uploading or downloading of presets.

• Management of preset lists.

• If both ComPair and the Force electronic service manual are installed, all the schematics and CBAs of the television set are available by clicking on the appropriate hyperlink.

• Example: Measure the DC-voltage on capacitor C2568

(Schematic/Panel) at the Mono-carrier. – Click on the 'Panel' hyperlink to automatically show the

CBA with a highlighted capacitor C2568.

– Click on the 'Schematic' hyperlink to automatically

show the electronic position of the highlighted capacitor.

5.4.3 How To Connect ComPair

1. First, install the ComPair Browser software on your PC (see the Quick Reference Card for installation instructions).

2. Connect the RS232 interface cable between a free serial (COM) port of your PC and the PC connector (marked with 'PC') of the ComPair interface.

3. Connect the mains adapter to the supply connector (marked 'POWER 9V DC') on the ComPair interface.

4. Switch the ComPair interface 'off'.

5. Switch the television set 'off' (and remove the mains).

6. Connect the ComPair interface cable between the connector on the rear side of the ComPair interface (marked 'I2C') and the ComPair connector on the family board (connector 0267).

7. Plug the mains adapter in the mains outlet and switch the ComPair interface 'on'. The green and red LEDs light up together. The red LED turns off after approximately 1 second, while the green LED remains lit.

8. Start the ComPair program and read the 'introduction' chapter.

PC VCR I2CPower

Figure 5-4 ComPair connection

5.4.4 How To Order

ComPair order codes:

• Starter kit ComPair32/SearchMan32 software and ComPair interface (excl. transformer): 3122 785 90450.

• ComPair interface (excluding transformer): 4822 727 21631.

• Starter kit ComPair32 software (registration version): 3122 785 60040.

• Starter kit SearchMan32 software: 3122 785 60050.

• ComPair32 CD (update): 3122 785 60070 (year 2002, 3122 785 60110 (year 2003).

• SearchMan32 CD (update): 3122 785 60080 (year 2002), 3122 785 60120 (year 2003).

• ComPair interface cable: 3122 785 90004.

• Transformer (non-UK): 4822 727 21632.

Note: If you encounter any problems, contact your local support desk.

5.5 Error Codes

The error code buffer contains all errors detected since the last time the buffer was erased. The buffer is written from left to right. When an error occurs that is not yet in the error code buffer, it is displayed at the left side and all other errors shift one position to the right.

5.5.1 How To Read The Error Buffer

You can read the error buffer in 3 ways:

• On screen via the SDAM (if you have a picture).

Examples:

– ERROR: 0 0 0 0 0 : No errors detected – ERROR: 6 0 0 0 0 : Error code 6 is the last and only

detected error

– ERROR: 9 6 0 0 0 : Error code 6 was detected first and

error code 9 is the last detected (newest) error

• Via the blinking LED procedure (when you have no picture). See 'The Blinking LED Procedure'.

•Via ComPair.

5.5.2 How To Clear The Error Buffer

The error code buffer is cleared in the following cases:

• By using the CLEAR command in the SDAM menu: – To enter SAM, press the following key sequence on the

remote control transmitter: '062596' directly followed by the “OSD" icon button (do not allow the display to time out between entries while keying the sequence).

– Make sure the menu item CLEAR is highlighted. Use

the MENU UP/DOWN buttons, if necessary.

– Press the MENU RIGHT button to clear the error

buffer. The text on the right side of the 'CLEAR' line will change from 'CLEAR?' to 'CLEARED'

• If the contents of the error buffer have not changed for 50 hours, the error buffer resets automatically.

I2C SERVICE CONNECTOR

9V DC

E_06532_008.eps

180804

EN 20 L04A AB5.

Note: If you exit SAM by disconnecting the Mains from the

television set, the error buffer is not reset.

5.5.3 Error Codes

In case of non-intermittent faults, write down the errors present in the error buffer and clear the error buffer before you begin the repair. This ensures that old error codes are no longer present. If possible, check the entire contents of the error buffer. In some situations, an error code is only the result of another error and not the actual cause of the problem (for example, a fault in the protection detection circuitry can also lead to a protection).

Table 5-3 Error codes overview

Error Codes Error Description Device Check item Diagram

0 No error Not applicable Not applicable N.A

1 X-Ray / over-voltage protection (US only) (#) Not applicable Not applicable N.A

2 High beam (BCI) protection Not applicable 3404, 7405 A2

3 Vertical guard protection Not applicable 3466, 7451, 7452, 7453, 7454 A2

4 I2C error while communicating with 2nd tuner Not applicable Not applicable N.A

5 +5v protection Not applicable 7604,7605 A5

6 General I2C error I2C bus 7200,3214 or 3207 A4

7 Power Down (over current) protection Not applicable Not applicable N.A

8 EW protection (sets with EW circuitry) Not applicable Not applicable N.A

9 I2C error while communicating with the EEPROM IC M24C16-WBN6 (ST00) L 7601, 3604, 3605 A5

10 I2C error while communicating with the PLL tuner TUNER UV1356A/A I G-3 (T.B.C) 1000,3000 or 3001 A3

11 Black current loop instability protection IC TDA6108JF/N1 (PHSE) L 7330, 3351, CRT B1

12 I2C error while communicating with the PIP processor Not applicable N.A N.A

13 I2C error while communicating with the Voice control processor Not applicable N.A N.A

14 I2C error while communicating with the DVD Interface module Not applicable N.A N.A

15 I2C error while communicating with LTI module Not applicable N.A N.A

16 I2C error while communicating with PIP_Demodulator Not applicable N.A N.A

17 I2C error while communicating with IBO module Not applicable N.A N.A

18 I2C error while communicating with other I2C IBO module Not applicable N.A N.A

19 I2C error while communicating with SSD stereo sound decoder IC SM TDA12010H1/N1B51 (PHSE)Y 7200 A4

20 I2C error while communicating with video cosmic in Hercules IC IC SM TDA12010H1/N1B51 (PHSE)Y 7200 A4

21 I2C error while communicating with the 3D processor (DPTV SVP). IC SM DPTVSVP (TRDI) Y 3204,3206,7201-3 T1

22 I2C error while communicating with the High End output proc. (TDA9330H). IC SM TDA9330H/N3 (PHSE) R 3244,7218,3243 T5

23 I2C error while communicating with the OSD memory (MTV030). IC MTV030N-64 (MYTE) L 7217,3288,3289 T5

24 I2C error while communicating with the ADC (MST9893B). IC SM MST9883-110 (MSTA) Y 3263 or 3264 or 7204 T3

Service Modes, Error Codes and Fault Finding

5.6 The Blinking LED Procedure

Using this procedure, you can make the contents of the error buffer visible via the front LED. This is especially useful when there is no picture.

When the SDM is entered, the LED will blink the contents of the error-buffer:

• When all the error-codes are displayed, the sequence finishes with an 'on' LED blink of 1.5 seconds,

• The sequence starts again.

Example of error buffer: 12 9 6 0 0 After entering SDM, the following occurs:

• 1 long 'on' blink of 5 seconds to start the sequence,

• 12 short blinks followed by a pause of 1.5 seconds,

• 9 short blinks followed by a pause of 1.5 seconds,

• 6 short blinks followed by a pause of 1.5 seconds,

• 1 long 'on' blink of 1.5 seconds to finish the sequence,

• The sequence starts again at 12 short blinks.

Service Modes, Error Codes and Fault Finding

EN 21L04A AB 5.

5.7 Protections

If a fault situation is detected, an error code will be generated; and, if necessary, the television set will go into protection mode. Blinking of the red LED at a frequency of 3 Hz indicates the protection mode. In some error cases, the microprocessor does not put the set in protection mode. The error codes of the error buffer and the blinking LED procedure can be read via the Service Default Menu (SDM), or via ComPair. To get a quick diagnosis the chassis has three service modes implemented:

• The Customer Service Mode (CSM).

• The Service Default Mode (SDM).

• The Service Alignment Mode (SAM).

For a detailed description, see the "Customer Service Mode, Service Default mode" and "Service Alignment Mode" sections.

5.8 Fault Finding and Repair Tips

Notes:

• It is assumed that the components are mounted correctly with correct values and no bad solder joints.

• Before any fault finding actions, check if the correct options are set.

5.8.1 NVM Editor

5.8.2 Power Supply

Set Not Working

Check Power

Supply Mains

Switch

Bridge Rectifier

circuit 6500

Check DC voltage at 2505/2507

Check fusible

resistor 3532

Not Ok

Check

7512

Not Ok

Check fusible resistor 3510 & circuit before it

Check IC7511 &

IC7531

Set able to

start-up

Ye s

Check other

fusible resistor

and capacitor in

the circuit

In some cases, it can be handy if one directly can change the NVM contents. This can be done with the “NVM Editor” in SAM mode. In the next table, the default NVM values are given.

Table 5-4 NVM default values

Alignment Default values (HEX)

EW (EW width) 1B

PW (EW parabola width) 2E

HS (Horizontal shift) 26

HP (Horizontal parallelogram) 7

HB (Horizontal Bow) 7

UCP (EW upper corner parabola) 16

LCP (EW lower corner parabola) 1F

TC (EW trapezium) 1B

VS (Vertical slope) 2C

VA (Vertical amplitude) 2C

SC (S-Correction) 1F

VSH (Vertical Shift) 18

VX (Vertical Zoom) 19

VSL (Vertical scroll) 1F

End

Figure 5-5 Fault finding tree “Set not working”

Set Does Not Start Up

Set Unable

to Start

Software

loaded?

Yes

Check

voltage

across 2552

Is Vbatt

approximately

140V

Yes

Check

voltage 2562

&2563

16V

Yes

Check 3V

across 2535

Yes

Check 6V

across 2535

Fuse Blown?

Load

Software

Yes

Check Power Supply circuit

Change

Fuse

E_14480_057.eps

190204

Yes

Set able to

Start

Yes

End

Check Line

Transistor 7405

E_14480_058.eps

Figure 5-6 Fault finding tree “Set does not start up”

170204

EN 22 L04A AB5.

Service Modes, Error Codes and Fault Finding

5.8.3 Deflection

One Thin Vertical Line

Quick check:

• Set in protection mode.

• LED blinking with error “3”.

One Thin Vertical Line

LED Blinking

Check all

connection and

peripheral at

Deflection Circuit in

place

Check

Line Transistor

7405

Is VBE between

200mV to 30mV & V

approximately 500mV

Blank Screen

Check Vg2

(fine tune)

Not Ok

Check Beam Current Limit

(voltage is 1.8V-2V when

brightness and contrast is

set to the maximum

Check heater voltage

(measure pin 9&10 at the CRT socket)

Check video supply

(2457) is approximately

180V

Yes

Check Horizontal

Deflection

Circuitry

Not Ok

Picture

appears?

Picture not appearing

Check deflection

circuit

Picture not appearing

Picture

appears?

Not Ok

Replace transistor

E_14480_059.eps

170204

Figure 5-7 Fault finding tree “One thin vertical line”

One Thin Horizontal Line

Quick check:

• Set in protection mode.

• LED blinking with error “2”.

One Horizontal

Thin Line

LED Blinking

Check all connection

and peripheral at

Deflection Circuit

in place

Check transistor

(7451, 7523, 7543) at

Vertical Deflection Circuitry

Replace transistor

Figure 5-9 Fault finding tree “Blank screen”

5.8.4 Source Selection

Set is not able to go into AV or any missing AV is encountered

E.g. AV1 is available but not able to enter to AV1: Check if the option setting is correct.

Set is able to go to AV, but no audio is heard.

1. Check that continuity of signal is there from the SCART/ Cinch input to the input of the Hercules.

2. If continuity is there and still no audio, check that option settings are correct.

3. If logic setting is correct and still no audio, proceed to Audio Decoder/Processor troubleshooting section.

Set is able to go into AV but no video is available:

1. Check continuity from AV input to HERCULES depending on the input.

2. If continuity is available and yet no video, proceed to Video Processor troubleshooting section.

End

E_14480_061.eps

170204

Check Vertical

Deflection Circuit

E_14480_060.eps

170204

Figure 5-8 Fault finding tree “One thin horizontal line”

Service Modes, Error Codes and Fault Finding

EN 23L04A AB 5.

5.8.5 Tuner and IF

No Picture

1. Check that the Option settings are correct.

2. If correct, check that supply voltages are there.

3. If supply voltages are present, check whether picture is present in AV.

4. If picture is present in AV, check with the scope the Tuner IF output signal by manual storage to a known channel.

5. If IF output is present, Tuner is working fine. If no IF output, I2C data lines may be open, check continuity of I2C lines. If I2C lines are ok, Tuner may be defect, replaced Tuner.

6. If Tuner IF is present and yet still no picture in RF mode, go to Video Processing troubleshooting section.

No Picture, No Sound

Yes

Check tuning

supply voltage,

pin 9 of tuner

>30V & <35V

Check supply

voltage, pin 7 of

tuner

No Picture,

No Sound, Raster Ok

Check AGC

Voltage, pin 1

of tuner

AGC voltage changes with

different signal

strength

Check

Supply

Section

Picture Ok, No Sound

Picture Ok,

No Sound

Check IF output of

tuner, pin 11

CVBS

present?

Ye s

Check SAW filter output

(pin 4&5)

EU/AP/CH (QSS)- 1001

NA/LA/AP INT - 1002

Output Ok?

Ye s

Refer to fig.

"Power Supply:

Set not working"

Replace SAW

filter

Check AGC

circuit section

Yes

Check Tuner

pin 4 & 5

I2C Bus

Yes

Replace Tuner

Check Power

Supply

Check other

functional area

E_14480_062.eps

Figure 5-10 Fault finding tree “No picture, no sound”

170204

Check other

functional area

E_14480_063.eps

170204

Figure 5-11 Fault finding tree “Picture ok, no sound”

Unable To Perform Tuning

Unable to

perform tuning

Enter SDM

check optionbyte 1

Correct

Check if tuner

Supply Voltage

pin 7

Incorrect

Yes

Check Tuner

Supply Voltage

Check I2C at pin

4 & 5 and tuner

Check other

functional area

Enter SDM and change

to the appropriate byte

Check Power

Supply

33V

Yes

Not Ok

Check I2C

circuit

Not Ok

I2C

Not Ok

E_14480_064.eps

Replace

Tuner

Not Ok

Tuner

170204

Figure 5-12 Fault finding tree “Unable to perform tuning”

EN 24 L04A AB5.

Service Modes, Error Codes and Fault Finding

5.8.6 Controller

Below are some guidelines for troubleshooting of the Micro Controller function. Normally Micro Controller should be checked when there is a problem of startup.

1. Check that both +3.3 V_dc and +1.8 V_dc are present.

2. Check that crystal oscillator is working.

3. Check that Power Good signal is at “high” logic, normal operation.

4. Check that HERCULES is not in standby mode. Pin 15 of HERCULES should be 0 V_dc.

5. Make sure H-drive pulse is there. This can be checked at resistor R3239. If H-drive does not exist, remove resistor R3239 to check if there is loading.

Note: When the set shuts down after a few second after power “on”, the main cause is that Vg2 not aligned properly, try adjusting Vg2 during the few seconds of power “on”.

5.8.7 Video Processing

No Picture

When “no picture in RF”, first check if the microprocessor is functioning ok in section “Controller”. If that is ok, follow the next steps. When “no picture in AV”, first check if the video source selection is functioning ok in section “Source Selection”. If that is ok, follow the next steps.

1. Check that normal operating conditions are met.

2. Check that there is video signal at pin 81. If no video, demodulator part of the HERCULES is faulty, replace with new HERCULES.

3. If video signal is available at pin 81, check pin 56, 57, and 58 for the RGB signal.

4. If signal is not available, try checking the BRIGHTNESS and/or CONTRAST control, and make sure it is not at zero.

5. If still with the correct settings and no video is available, proceed to the CRT/RGB amplifier diagram.

For sets with TDA9178, follow steps below:

1. Put Option Byte 2 bit 4 to “0”; if video signal is not available, then check fault finding section “Controller”, Section “Source Selection”, and steps above.

2. If video is available but not correct, put Option Byte 2 bit 4 to “1”, then check if LTI panel is present. If not, put LTI panel in the main chassis (connector 1221).

3. If LTI panel is in main chassis, check cable between LTI panel and main chassis (position is 1206). If it is connected, then the LTI panel is faulty, replace it.

For sets with Scavem, and Scavem does not work, follow steps below:

1. Check Scavem coil connector (position is 1361) if connected; if not, connect it.

2. If connected, check NVM “bit storage” byte 1 bit 7; if it is not “1”, set it to “1”.

3. If it is “1”, then check the data of the NVM addresses as in the NVM default. If the data is not correct, then set these addresses to diagram values.

4. If it still not works, track Scavem output from pin64 of HERCULES to CRT panel.

5.8.8 Audio Processing

No Sound

Picture Ok,

No Sound

Tuner IF Ok Check Tuner/IFNot Ok

Check AUDOUTLSL &

AUDOUTLSR pin at

Hercules

Check Audio

Amplifier

Not Ok

Check Hercules IC

Check Audio

Power Supply

Check Audio

Amplifier Circuit

and loud speaker

Check NVM

Not Ok

Figure 5-13 Fault finding tree “No sound”

No RF audio for QSS/Inter-Carrier stereo sets.

1. Check pin 99 and 100 for SIF signal (for QSS) or pin 104 and 105 for video with SIF (for Inter-Carrier)

2. If signal is not present, check for the QSS/FMI bit settings. Check also the NVM data.

3. If signals are present and still no audio, check the audio supply voltage +8V are present.

4. If still no audio signal at Hercules output, Hercules is faulty.

No AV audio.

1. Check troubleshooting methods in section “Source Selection”.

2. Check the output of the Hercules to see if there is signal available. If no, check the normal operating condition and also the NVM data.

3. If still no audio signal at Hercules output, Hercules is faulty.

Note: If there is audio signal at Hercules output and no audio at loudspeaker, proceed to Audio Amplifier troubleshooting methods.

5.8.9 Audio Amplifier

No RF as well as AV audio at the loudspeaker:

1. Check that the normal operation condition of the amplifier is met.

2. If normal operation conditions are met, check the continuity from Hercules output to input of the amplifier.

3. If continuity is there and still no audio, check speaker wire connections. If still no audio, amplifier IC might be faulty

Check Power

Supply

Replace Audio

Amplifier

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Block Diagrams, Testpoint Overviews, and Waveforms

6. Block Diagrams, Testpoint Overviews, and Waveforms

Wiring Diagram

(component view)

CRT PANEL

25L04A AB 6.

DEGAUSSING COIL

AQUADAG

CRT

EHT CRT

CVBS (YELLOW)

LEFT (WHITE)

RIGHT (RED)

HEADPHONE

SIDE

A/V PANEL + HEADPHONE

BLACK

RED

1279

RIGHT

SPEAKER

1252

1254

1278

1280

1331

1351

1332

1352

CRT

SOCKET

1361

RED

SCAVEM

COIL

LEFT

SPEAKER

CRT PANEL

1381

BLACK

RED

FRONT INTERFACE

0214

0212

MAINS

SWITCH

1211

MAINS CORD

1582

1510

1693

1509

1504

1508

MONO

CARRIER

1201

TRIDENT

1204

1205

1206

15P

TRIDENT

INTERFACE

1205

15P

1206

15P

1202

1682

1244

1246

1221

1245

1219

9P91

1403

1401

1451

11P

LOT

1404

5401

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180404

1206

1204

1203

5P5P5P

1208

1201

11P

COMPAIR

CONNECTOR

1005

1207

TUNER

1013

Block Diagrams, Testpoint Overviews, and Waveforms

Block Diagram Supply and Deflection

26L04A AB 6.

SUPPLY AND DEFLECTION

SUPPLY

FRONT INTERFACE

1211

1505

1231

MAINS

SWITCH

(not USA)

POWER SUPPLY

Degaussing

1506

MAINS

SWITCH

(not USA)

I511

6512

3519

7532

F508 268V / div DC

F511 15V5 / div DC F531 2V7 / div DC F537 0V (N.A.)

I513 I516 I519 I533

Coil

2511

6533

3530

I531

1500

T4E

7511 TEA1506T

Vcc

CTRL

STANDBY

7531 TEA1623

Vcc

REG

AUX

0212

1504

3507

5500 : 5502

DRAIN

DRIVER

SENSE

CONTROL

DEMAG

SUPPLY

DRAIN

CONTROL

SOURCE

F552 130V / div DC F561 15V9 / div DC

F564 9V4 / div DC F573 0V (N.A.)

6532

TRIDENT INTERFACE BOARDA

DEFLECTION

7201-2 6930DPTVSVP

Testpoint Overview Mono Carrier

F001 E1 F002 E1 F003 E2 F004 E2 F005 E1 F006 E2 F007 E1 F008 E1 F009 D4 F010 E2 F011 E1 F101 D1

F102 D1 F103 D1 F104 D1 F105 D1 F106 D1 F107 D1 F108 D1 F109 D1 F110 C1 F111 D1 F112 C1 F113 C1

F116 E1 F117 E2 F122 D1 F123 D1 F200 D5 F201 C4 F202 D4 F203 D4 F204 C4 F205 D4 F207 D4 F209 E4

F210 E4 F211 E5 F212 E4 F213 E4 F214 D4 F215 D3 F224 C3 F225 D2 F226 D2 F227 E4 F228 C4 F229 C4

F230 D4 F232 D4 F233 D4 F237 D4 F238 D4 F239 D4 F247 E2 F248 E2 F249 E2 F251 D4 F270 D4 F401 C5

F402 B2 F404 C2 F407 B3 F412 B2 F414 A2 F416 A4 F417 A3 F418 A2 F419 B3 F420 B2 F451 C1 F452 C2

F453 B2 F454 C2 F455 B2 F456 A1 F457 A2 F458 C2 F459 C2 F460 C2 F461 C2 F462 A1 F463 B1 F464 A3

F465 A3 F466 A1 F467 C3 F468 C3 F500 C7 F501 B6 F502 B7 F503 A7 F504 A7 F505 A7 F506 A7 F507 A7

F508 A5 F509 A5 F510 B4 F535 C5 F536 C4 F537 C5 F541 C6 F542 C5 F552 B4 F561 C5 F562 B5 F563 C5

F564 C4 F573 C4 F581 D5 F582 D5 F583 C5 F682 D7 F683 D7 F685 D7 F691 C7 F692 B7 F693 A7 F694 C7

F695 C7 F696 B7 F697 A7 F698 C7 F699 B7 F901 D6 F903 D7 F904 D7 F905 D7 F910 D6 F911 D6 F950 D6

F951 D6 F952 E6 F953 E5 F955 E6 I001 E1 I002 E1 I003 E2 I004 E2 I005 E4 I006 E3 I007 E1 I008 E3

I009 E3 I010 E3 I011 E1 I012 E2 I014 E1 I015 E1 I016 E1 I017 D4 I107 E1 I108 D1 I111 D2 I112 D1

I113 C1 I114 D1 I116 C2 I120 C2 I201 E4 I203 E3 I204 E4 I205 E4 I206 E4 I208 C3 I209 D3 I210 D3

I211 D3 I212 D3 I213 E4 I214 E4 I215 E3 I216 D3 I222 D4 I224 D4 I225 D4 I226 C3 I227 E4 I228 D4

27L04A AB 6.

I229 D4 I230 D4 I231 D4 I233 E2 I234 E5 I235 D4 I236 D4 I240 E5 I241 E5 I412 A4 I414 B3 I418 B3

I419 C3 I424 A1 I427 C3 I428 B3 I429 A1 I432 B2 I446 C4 I448 A1 I449 B1 I451 B2 I452 A1 I453 B2

I455 B2 I456 B1 I457 B2 I459 B1 I460 C1 I461 C1 I462 C1 I463 B1 I464 C1 I465 A1 I466 B2 I467 A1

I468 B1 I469 A1 I470 B1 I471 C1 I472 C1 I473 A3 I474 A3 I475 B1 I476 B3 I477 C3 I478 C4 I501 A6

I502 A6 I503 A7 I504 A7 I505 B7 I506 A6 I507 B6 I511 A4 I513 A4 I514 B4 I515 A4 I516 A4 I517 A4

I518 A4 I519 A4 I520 A4 I521 A4 I523 A4 I524 A4 I527 A4 I529 B6 I531 B5 I532 B6 I533 B6 I535 B6

I536 B5 I537 C5 I538 C5 I539 B6 I540 B5 I541 B5 I542 C6 I543 C6 I544 B6 I545 C6 I546 C6 I547 C6

I548 C6 I551 B4 I552 B4 I553 B6 I554 B5 I555 B5 I556 B5 I557 B5 I561 B5 I562 B5 I565 C5 I571 B4

I572 B4 I573 B4 I574 B4 I575 B4 I576 B4 I577 B4 I578 B4 I579 B4 I582 D5 I583 D5 I584 D5 I585 D5

I587 C5 I588 D5 I681 A7 I682 D7 I683 D7 I686 C7 I687 B7 I688 C7 I689 B7 I691 A7 I693 B7 I909 D6

I910 C6 I911 C6 I913 C6 I914 C6 I915 C6 I916 C7 I918 C6 I919 C6 I920 D6 I921 C6 I922 C6 I924 D6

I925 D6 I926 D7 I927 C6 I928 D7 I930 C7 I934 D7 I935 D7 I936 D7 I937 C7 I938 D6 I939 D7 I940 D6

I941 C6 I942 C6 I943 D7 I944 C6 I945 C7 I946 D6 I948 D6 I951 E5 I952 E5 I953 E6 I954 E6 I955 D5

I956 E6 I957 E6 I958 D5 I959 D5

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