PHILIPS L03.2L AA Service Manual

Colour Television Chassis

L03.2L

AA

E_14560_000.eps

260204

Contents Page

1. Technical Specifications, Connections and Chassis Overview 2

2. Safety Instructions, Warnings, and Notes 4

3. Directions for Use 5

4. Mechanical Instructions 6

5. Service Modes, Error Codes, and Fault Finding 7

6. Block Diagrams, Testpoint Overviews, and Waveforms
Block Diagram 11
I2C and Supply Voltage Overview 12
Testpoint Overview Mono Carrier and CRT Panel 13

7. Circuit Diagrams and PWB Layouts Diagram PWB
Mono Carrier: Power Supply (A1)14 21-24
Mono Carrier: Deflection (A2)15 21-24
Mono Carrier: Tuner IF (A3)16 21-24
Mono Carrier: Video Processing (A4)17 21-24
Mono Carrier: Audio - BTSC Stereo Decoder (A5)18 21-24
Mono Carrier: Audio Amplifier + Mono Sound Processing (A6)19 21-24
Mono Carrier: Front I/O + Front Control + Headphone (A7)20 21-24
CRT Panel (B1)25 26

8. Alignments 27

9. Circuit Descriptions, List of Abbreviations, and IC Data Sheets34
Abbreviation List 37

10. Spare Parts List 39

11. Revision List 42

©

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.

Published by JH 0564 TV Service Printed in the Netherlands Subject to modification EN 3122 785 15381

EN 2 L03.2L AA1.

Technical Specifications, Connections and Chassis Overview

1. Technical Specifications, Connections and Chassis Overview

Index of this chapter:

1.1 Technical Specifications

1.2 Connection Overview

1.3 Chassis Overview

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

1.1 Technical Specifications

1.1.1 Vision

Display type : CRT, DV, FSQ
Screen size : 14” (37 cm), 4:3

: 21” (55 cm), 4:3
Tuning system : PLL
TV Colour systems : NTSC M/N 3.58
Video playback : NTSC M/N 3.58, 4.43

Channel selections : 181 presets

1.1.2 Sound

Sound systems : FM-mono

Maximum power (W

) : 1 x 1 (3005-models)

RMS

: PAL B/G

: Full-Cable

(3005-models)

: BTSC with SAP

(3205-models)

: 2 x 1 (3205-models)

Mini Jack: Audio Head phone - Out

Bk - Head phone 8 - 600 ohm / <4 mW ot

Cinch: Video CVBS - In, Audio - In

Ye -Video CVBS 1 V
Wh - Audio L 0.2 V
Rd - Audio R 0.2 V

/ 75 ohm jq

PP

/ 10 kohm jq

RMS

/ 10 kohm jq

RMS

1.2.2 Rear Connections

75 Ohm ANT.

Figure 1-2 Rear connections

FM Ant

1 -F type 75 ohm, coax D

E_14560_015.eps

260204

1.1.3 Miscellaneous

Power supply:

- Mains voltage (V

) : 220-240 (/44 models)

AC

: 105-132 (/55 models)

- Mains frequency (Hz) : 50 / 60

Ambient conditions:

- Temperature range (°C) : +5 to +40

- Maximum humidity : 90% R.H.

1.2 Connection Overview

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, and Ye= Yellow.

1.2.1 Front Connections

INSTALL/MENU

INSTALL MENU POWER

- VOLUME + CHANNEL

AUDIO L

AUDIO R

- VOLUME +

CHANNEL

IR LEDVIDEO

E_14560_014.eps

220304

Figure 1-1 Front connections

Technical Specifications, Connections and Chassis Overview

1.3 Chassis Overview

CRT PANEL

B1

EN 3L03.2L AA 1.

MONO

CARRIER

Figure 1-3 Chassis overview

POWER SUPPLY

DEFLECTION

TUNER IF

IF, VIDEO PROCESSING, CONTROL,
AND SYNC.

AUDIO BTSC STEREO DECODER

AUDIO AMP + MONO SOUND PROC.

FRONT I/O + FRONT CONTROL
+ HEADPHONE

E_14560_013.eps

A1

A2

A3

A4

A5

A6

A7

240304

EN 4 L03.2L AA2.

Safety Instructions, Warnings, and Notes

2. Safety Instructions, Warnings, and Notes

Index of this chapter:

2.1 Safety Instructions

2.2 Maintenance Instructions

2.3 Warnings

2.4 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.

• Wear safety goggles when you replace the CRT.

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

• General repair instruction: as a strict precaution, we advise

you to re-solder the solder connections through which the
horizontal deflection current is flowing. In particular this is
valid for the:

1. Pins of the line output transformer (LOT).

2. Fly-back capacitor(s).

3. S-correction capacitor(s).

4. Line output transistor.

5. Pins of the connector with wires to the deflection coil.

6. Other components through which the deflection current
flows.

Note: This re-soldering is advised to prevent bad connections
due to metal fatigue in solder connections, and is therefore only
necessary for television sets more than two years old.

• Route the wire trees and EHT cable correctly and secure
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, to prevent the cord from touching the CRT,
hot components, or heat sinks.

• 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 Maintenance Instructions

We recommend a maintenance inspection carried out by
qualified service personnel. The interval depends on the usage
conditions:

• When a customer uses the set under normal
circumstances, for example in a living room, the
recommended interval is three to five years.

• When a customer uses the set in an environment with
higher dust, grease, or moisture levels, for example in a
kitchen, the recommended interval is one year.

• The maintenance inspection includes the following actions:

1. Perform the “general repair instruction” noted above.

2. Clean the power supply and deflection circuitry on the
chassis.

3. Clean the picture tube panel and the neck of the picture
tube.

2.3 Warnings

• In order to prevent damage to ICs and transistors, avoid all
high voltage flashovers. In order to prevent damage to the
picture tube, use the method shown in figure “Discharge
picture tube”, to discharge the picture tube. Use a high
voltage probe and a multi-meter (position V
until the meter reading is 0 V (after approx. 30 s).

V

Figure 2-1 Discharge picture tube

• 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.

2.4 Notes

2.4.1 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
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

). Discharge

DC

E_06532_007.eps

250304

Directions for Use

EN 5L03.2L AA 3.

semiconductors in the unit, irrespective of the type
indication on these semiconductors.

2.4.2 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.

2.4.3 Lead Free Solder

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

1.1.2005 onwards.

-9

), or pico-farads (p= x10

P

b

Figure 2-2 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. 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

-12

– 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

-6

),

).

2.4.4 Practical Service Precautions

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.

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

• 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.

3. Directions for Use

You can download this information from the following websites:

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

EN 6 L03.2L AA4.

Mechanical Instructions

4. Mechanical Instructions

Index of this chapter:

4.1 Rear Cover Removal

4.2 Service Position Main Panel

4.3 Rear Cover Mounting

4.1 Rear Cover Removal

1. Remove all fixation screws of the rear cover.

2. Now pull the rear cover in backward direction to remove it.

4.2 Service Position Main Panel

1. Disconnect the strain relief of the AC power cord.

2. Remove the main panel, by pushing the two center clips
outward [1]. At the same time pull the panel away from the
CRT [2].

3. If necessary, disconnect the degaussing coil by removing
the cable from the (red) connector 1512.

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

4.3 Rear Cover Mounting

Before you mount the rear cover, perform the following checks:

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

2. Re-place the strain relief of the AC power cord into the
cabinet.

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

1

1

2

A

3

B

CL 16532016_006.eps

220501

Figure 4-1 Service Position

Service Modes, Error Codes, and Fault Finding

5. Service Modes, Error Codes, and Fault Finding

EN 7L03.2L AA 5.

Index of this chapter:

5.1 Test Points

5.2 Service Modes

5.3 Problems and Solving Tips

5.4 ComPair

5.5 Error Codes

5.6 The Blinking LED Procedure

5.7 Protections

5.8 Repair Tips

5.1 Test Points

This chassis is equipped with test points in the service printing.
In the schematics test points are identified with a rectangle box
around Fxxx or Ixxx. On the PCB, test points are specifically
mentioned in the service manual as “half moons” with a dot in
the center.

Perform measurements under the following conditions:

• Service Default Alignment Mode.

• Video: color bar signal.

• Audio: 3 kHz left, 1 kHz right.

5.2 Service Modes

Service Default Alignment Mode (SDAM) offers several
features for the service technician.

There is also the option of using ComPair, a hardware interface
between a computer (see requirements below) and the TV
chassis. It offers the ability of structured trouble shooting, test
pattern generation, error code reading, software version
readout, and software upgrading.
Minimum Requirements: a Pentium Processor, Windows 95/
98, and a CD-ROM drive (see also paragraph “ComPair”).

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

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

• All service-unfriendly modes (if present) are disabled, like:
– (Sleep) timer,
– Child/parental lock,
– Blue mute,
– Hotel/hospitality mode
– Auto switch-off (when no “IDENT” video signal is

received for 15 minutes),
– Skip / blank of non-favorite presets / channels,
– Auto store of personal presets,
– Auto user menu time-out.

• Operation hours counter.

• Software version.

• Option settings.

• Error buffer reading and erasing.

• Software alignments.

How to enter SDAM

Use one of the following methods:

• Use a standard customer RC-transmitter and key in the
code 062596 directly followed by the “M” (menu) button or

• Short jumper wires 9257 and pin 4 of 7200 on the mono
carrier (see Fig. 8-1) and apply AC power. Then press the
power button (remove the short after start-up).
Caution: Entering SDAM by shortening wires 9257 and pin
4 of 7200 will override the +8V-protection. Do this only for
a short period. When doing this, the service-technician
must know exactly what he is doing, as it could lead to
damaging the set.

• Or via ComPair.

After entering SDAM, the following screen is visible, with S at
the upper right side for recognition.

Table 5-1 SW Cluster

SW
Cluster

Software
name UOC type

UOC
Diversity

L3SUM1 L03UM1 x.y TDA9377 55K

ROM Size

L3SUN1 L03UN1 x.y TDA9377 55K

ROM Size

Abbreviations in Software name:
U = Nafta, M = Mono, N = Stereo.

5.2.1 Service Default Alignment Mode (SDAM)

Purpose

• To change option settings.

• To create a predefined setting to get the same
measurement results as given in this manual.

• To display / clear the error code buffer.

• To override SW protections.

• To perform alignments.

• To start the blinking LED procedure.

Specifications

Table 5-2 SDM default settings

Region Freq. (MHz)

Europe, AP-PAL/Multi 475.25 PAL B/G
NAFTA, AP-NTSC, LATAM 61.25 (ch. 3) NTSC M

Special
Features

Mono

Stereo
(non DBX)

Default
system

    

      

  
  

 
     
 
   



CL 36532044_033.eps

130603

Figure 5-1 SDAM menu

• LLLL. This is the operation hours counter. It counts the
normal operation hours, not the standby hours.

• AAABCD-X.Y. This is the software identification of the
main micro controller:
– A = the project name (L03).
– B = the region: E= Europe, A= Asia Pacific, U= NAFTA,

L= LATAM.

– C = the feature of software diversity: N = stereo non-

DBX, S = stereo dBx, M = mono, D = DVD
– D = the language cluster number:
– X = the main software version number.
– Y = the sub software version number.

• S. Indication of the actual mode. S= SDAM= Service
Default Alignment mode.

• Error buffers. Five errors possible.

• Option bytes. Seven codes possible.

EN 8 L03.2L AA5.

Service Modes, Error Codes, and Fault Finding

• Clear. Erase the contents of the error buffer. Select the
CLEAR menu item and press the CURSOR RIGHT key.
The content of the error buffer is cleared.

• Options. To set the Option Bytes. See chapter 8.3.1 for a
detailed description.

• AKB. Disable (0) or enable (1) the “black current loop”
(AKB = Auto Kine Bias).

• Tuner. To align the Tuner. See chapter 8.3.2 for a detailed
description.

• White Tone. To align the White Tone. See chapter 8.3.3
for a detailed description.

• Geometry. To align the set geometry. See chapter 8.3.4
for a detailed description.

• Audio. Use default value (Stereo set only), align when
necessary. See chapter 8.3.x for a detailed description.

How to navigate

• In SDAM, select menu items with the CURSOR UP/DOWN
key on the remote control transmitter. The selected item
will be highlighted. When not all menu items fit on the
screen, move the CURSOR UP/DOWN key to display the
next / previous menu items.

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

• When you press the MENU button twice, the set will switch
to the normal user menus (with the SDAM mode still active
in the background). To return to the SDAM menu press the
OSD / STATUS button.

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

White line around picture elements and text

Decrease the SHARPNESS value when:

• The picture improves after you have pressed the “Smart
Picture” button on the remote control.

The new “Personal” preference value is automatically stored.

Snowy picture

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

• Antenna not connected. Connect the antenna.

• No channel / pre-set is stored at this program number. Go
to the INSTALL menu and store a proper channel at this
program number.

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

Snowy picture and/or unstable picture

• A scrambled or decoded signal is received.

Black and white picture

Increase the COLOR value when:

• The picture improves after you have pressed the “Smart
Picture” button on the remote control.

The new “Personal” preference value is automatically stored.

Menu text not sharp enough

Decrease the CONTRAST value when:
The picture improves after you have pressed the “Smart
Picture” button on the remote control.
The new “Personal” preference value is automatically stored.

How to store settings

To store settings, leave the SDAM mode with the Standby
button on the remote.

How to exit

Switch the set to STANDBY by pressing the power button on
the remote control (if you switch the set 'off' by removing the AC
power, the set will return in SDAM when AC power is re­applied). The error buffer is not cleared.

5.3 Problems and Solving Tips

5.3.1 Picture Problems

Note: Below described problems are all related to the TV

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

No colors / noise in picture

1. Press the MENU button on the remote control.

2. Select the INSTALLATION sub menu.

3. Select and change the SYSTEM setting until picture and
sound are correct.

4. Select the STORE menu item.

Colors not correct / unstable picture

1. Press the MENU button on the remote control.

2. Select the INSTALLATION sub menu.

3. Select and change the SYSTEM setting until picture and
sound are correct.

4. Select the STORE menu item.

5.3.2 Sound Problems

No sound or sound too loud (after channel change / switching on)

Increase / decrease the VOLUME level.
Press the Smart Sound button repeatedly to access 4 different
types of sound settings and choose your desired setting.

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 on the European DST (service remote control),
which allows faster and more accurate diagnostics. ComPair
has three big advantages:

• ComPair helps you to quickly 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 I
is therefore capable of accurately indicating problem areas.
You do not have to know anything about I
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 SearchMan electronic manual of the defective chassis,
schematics and PWBs are only a mouse click away.

5.4.2 Specifications

2

C level) and

2

C commands

Picture too dark or too bright

Increase / decrease the BRIGHTNESS and / or the
CONTRAST value when:

• The picture improves after you have pressed the “Smart
Picture” button on the remote control.

• The picture improves after you have switched on the
Customer Service Mode

The new “Personal” preference value is automatically stored.

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

Service Modes, Error Codes, and Fault Finding

EN 9L03.2L AA 5.

connector (located on the Main panel, (see figure "Top view
Mono Carrier" in chapter 8 "Alignments").

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

• Automatic (by communication with the television):
ComPair can automatically read out the contents of the
entire error buffer. Diagnosis is done on I
can access the I
and receive I

2

C bus of the television. ComPair can send

2

C commands to the micro controller of the
television. In this way, it is possible for ComPair to
communicate (read and write) to devices on the I

2

C level. ComPair

2

C busses

of the TV-set.

• Manually (by asking questions to you): Automatic
diagnosis is only possible if the micro controller 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 (e.g. Does the

screen give a picture? Click on the correct answer: YES /
NO) and showing you examples (e.g. Measure test-point I7
and click on the correct oscillogram you see on the
oscilloscope). You can answer by clicking on a link (e.g.

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 / answer procedure, ComPair will enable you to find
most problems in a fast and effective way.

Besides fault finding, ComPair provides some additional
features like:

• Up- or downloading of pre-sets.

• Managing of pre-set lists.

• Emulation of the Dealer Service Tool (DST).

• If both ComPair and SearchMan (Electronic Service
Manual) are installed, all the schematics and the PWBs of
the 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

PWB with a highlighted capacitor C2568.

– Click on the 'Schematic' hyperlink to automatically

show the position of the highlighted capacitor.

PC VCR I2CPower

Figure 5-2 ComPair connection

5.4.4 How to Order

ComPair order codes (EU/AP/LATAM):

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

• ComPair interface (excl. 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 onwards).

• SearchMan32 CD (update): 3122 785 60080 (year 2002),
3122 785 60120 (year 2003), 3122 785 60130 (year 2004).

• ComPair firmware upgrade IC: 3122 785 90510.

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

• Transformer UK: 4822 727 21633.

• ComPair interface cable: 3122 785 90004.

• ComPair interface extension cable: 3139 131 03791.

5.4.5 Error Buffer

The error code buffer contains all detected errors 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 written at the left side and all other errors shift one
position to the right.

5.4.6 How To Read the Error Buffer

I2C SERVICE
CONNECTOR

9V DC

E_06532_008.eps

180804

TO

5.4.3 How to Connect ComPair

1. First, install the ComPair Browser software (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 AC power adapter to the supply connector
(marked with “POWER 9V DC”) on the ComPair interface.

4. Switch the ComPair interface OFF.

5. Switch the television set OFF (remove the AC power).

6. Connect the ComPair interface cable between the
connector on the rear side of the ComPair interface
(marked with “I

2

C”) and the ComPair connector on the
mono carrier (see figure "Top view Mono Carrier" in
chapter 8 "Alignments").

7. Plug the AC power adapter in the AC power outlet and
switch on the interface. The green and red LEDs light up
together. The red LED extinguishes after approx. 1 second
while the green LED remains lit.

8. Start the ComPair program and read the “introduction”
chapter.

You can read the error buffer in 3 ways:

• On screen via the SDAM (only 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 first detected and

error code 9 is the last detected (newest) error

• Via the blinking LED procedure (when you have no
picture). See next paragraph.

•Via ComPair.

5.4.7 How to Clear the Error Buffer

The error code buffer is cleared in the following cases:

• By activation of the CLEAR command in the SDAM menu:

• If the content of the error buffer has not changed for 50
hours, it resets automatically.

Note:

When leaving SDAM by disconnecting the set from AC power,
the error buffer is not reset.

EN 10 L03.2L AA5.

5.5 Error Codes

In case of non-intermittent faults, clear the error buffer before
you begin the repair. These to ensure 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
code and not the actual cause (e.g., a fault in the protection
detection circuitry can also lead to a protection).

Table 5-3 Error Code Table

ERROR Device Error description Check item Diagram

0 Not applicable No Error - ­1 Not applicable X-Ray Protection (USA) 7421, 2423, 6421, 6422 A2
2 Not applicable Horizontal Protection 7421, 7422, 7423 A2
3 Not applicable Vertical Protection 7461, 7462, 7463, 7464, 7465, 7466 A2
4 TDA9853H Tone control & Audio processor I

identification error
5 TDA93XX POR 3.3V / 8V Protection 7200, 7541, 7491, 7493, 7496 A4, A1
6I
7 Not applicable - - ­8 Not applicable E/W Protection (Large Screen) - ­9M24C16 NVM I
10 Tuner Tuner I
11 Not applicable Black current loop protection 3313, 7307, 7308, 7309, 7310, 7311, 7312, 7313,

12 Not applicable MAP I
13 Not applicable VC I
14 Not applicable DVD I

2

C bus General I2C bus error 7200, 3604, 3605 A4

2

C identification error 7641, 3641, 3642, 3643 A4

2

C identification error 1000, 3003, 3004 A3

2

C identification error (USA) - -

2

C identification error (Eu) - -

2

C identification error - -

Service Modes, Error Codes, and Fault Finding

2

C

7861 (Stereo/Sap) A5

7314, 7315, 7316, 7317, 7318, CRT

B1

5.6 The Blinking LED Procedure

Via 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 SDAM is entered, the LED will blink the contents of
the error-buffer.

• n short blinks (n = 1 - 14),

• When all the error-codes are displayed, the sequence
finishes with a LED blink of 3 s,

• The sequence starts again.

Example of error buffer: 12 9 6 0 0
After entering SDAM:

• 12 short blinks followed by a pause of 3 s,

• 9 short blinks followed by a pause of 3 s,

• 6 short blinks followed by a pause of 3 s,

• 1 long blink of 3 s to finish the sequence,

• the sequence starts again.

5.7 Protections

If a fault situation is detected an error code will be generated
and if necessary the set will be put in the 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 the protection mode. The error codes of
the error buffer can be read via the service menu (SDAM), the
blinking LED procedure or via ComPair.

To get a quick diagnosis the chassis has one service modes
implemented:

• The Service Default Alignment Mode (SDAM). Start-up of
the set in a predefined way and adjustment of the set via a
menu and with the help of test patterns.

5.8 Repair Tips

Below some failure symptoms are given, followed by a repair
tip.

• Set is dead and makes hiccupping sound. “Main
Supply” is available. Hiccupping stops when de-soldering
L5563, meaning that problem is in the “Main Supply” line.
No output voltages at LOT, no horizontal deflection.
Reason: line transistor 7421 is defective.

• Set is dead, and makes no sound. Check power supply
IC 7520. Result: voltage at pins 2, 6, 7, 9 and 11 are about
180 V and pin 14 is 0 V. The reason why the voltage on
these pins is so high is because the output driver (pin 11)
has an open load. That is why MOSFET 7521 is not able to
switch. Reason: feedback resistor 3523 is defective.
Caution: be careful measuring on the gate of 7521;
circuitry is very high ohmic and can easily be damaged!

• Set is in hiccup mode and shuts down after 8 s. Blinking
LED (set in SDM mode) indicates error 5. As it is unlikely
that the “POR” and “+8V protection” happen at the same
time, measure the “+8V”. If this voltage is missing, check
transistor 7491 and 7496.

• Set is non-stop in hiccup mode. Set is in over current
mode; check the secondary sensing (opto coupler 7515)
and the “Main Supply” voltage. Signal “Stdby_con” must be
logic low under normal operation conditions and goes to
high (3.3 V) under standby and fault conditions.

• Set turns on, but without picture and sound. The screen
shows snow, but OSD and other menus are okay. Blinking
LED procedure indicates error 11, so problem is expected
in the tuner (pos. 1000). Check presence of supply
voltages. As “Vlotaux+5V” at pin 5 and 7 are okay,
“VT_supply” at pin 9 is missing. Conclusion: resistor 3449
and 3450 are defective

Block Diagrams, Testpoint Overviews, and Waveforms

6. Block Diagrams, Testpoint Overviews, and Waveforms

Block Diagram

EN 11L03.2L AA 6.

A7

V

L

A3

FRONT I/O

MONO

TUNER IF

A4

A4

ComPair

CONN.

SDA

SCL

STEREO

V

L

R

VT_SUPPLY

+5V

1003

1

2

3

SDA

SCL

1000
UV1336

2

SY_CVBS_IN

L1_IN

R1_IN

6, 7 9

TV TUNER

ERR

10

5

4

3004

3003

AGC

VT

1

6001
BZX79-C33

11

IF

VT_SUPPLY_A

1001

T1

TUNER_AGC

AUDIO PROCESSING (BTSC STEREO DECODER)

A5

7861
TDA9853H

L1_IN

8

26

4

(MONO)

INPUT

SELECT

BTSC STEREO

+

DECODER

ERR

4

VIDEO

PLL

DEMOD.

AUDI O

SWITCH

35

A8

R1_IN

A1

IF, VIDEO PROCESSING

VIF_1

VIF_2

A4

7200-A
TDA93XX

23

VIDEO

IF

24

AGC

27

SOUND

FM-DEMOD.

DE-EMPH.

A5

L1_IN

A7

A2

A5

1

18

A4

A3

38

18

A2

VIDEO

AMPLIFIER

SOUND

AMPL.

+ AVL

Main_OutL

Main_OutR

3865

3866

38

44

SDA

SCL

AM_FM_MONO

+8VD

V1

+8V

AUDIO CARRIER

7201

3205

7202

3203

FILTER

5201

1201

4.5MHz

A6

AUDIO AMPLIFIER

Main_OutL

Main_OutR

A4

N.C.

SY_CVBS_IN

7901 AN7522N (STEREO)

7902 AN7523N (MONO)

A6

2904

62

A7

2906

8

VOLUME

9

1

6909

3911

7200-C
TDA93XX

40

SWITCHING

VIDEO

43

FILTERS

42

VIDEO
IDENT

1

3901

5

A8

A9

4L-

A10

10 R-

A11

12 R+

FILAMENT

HEADPHONE

A7

L+

L-

R-

R+

I/O

N.C.

L+

L-

R-

R+

SPEAKER
2 X 5W 16 Ohm
2 X 3W 8 Ohm
2 X 1W 8 Ohm

Y-DELAY

PAL/NTSC
DECODER

R_SC1_IN_V_IN
G_SC1_IN_Y_IN
B_SC1_IN_U_IN
FBL_SC1_IN

Vaudio

+5V

L+

R-Y

B-Y

1900

4

5

1

2

BASE
BAND

DELAY

L

R

Y

U

V

RGB

MATRIX

RGB

INSERT

BLACK

STRETCH

WHITE

STRETCH

4746 48

45

R

CONTROL

G

OSD/TEXT/CC

B

STRETCH

OSD

RGB

INSERT

BLUE

WHITE-P.

ADJ

50

3619

51

3620

52

3621

53

49

3624

A7

6692
TSOP1836

KEYBOARD

POWER (USA only)

V9

V10

V11

BEAM-LIMIT

BLK_IN

FRAME_OUT

FRONT CONTROL

F1

1

LOCAL

CHANNEL + / -

VOLUME + / -

RED

GREEN

BLUE

A2

A2

CONTROL

A4

KEYBOARD

B1

1300

1

2

3

4

5

6

7

8

CRT

IR

62

8

7308
7313
7314

V12

7310
7315
7316

V13

7312
7317
7318

V14

+170V0

IR

1622

1

2

3

4

5

7200-B
TDA93XX

ROM
RAM

1/10

PAGES

MEMORY

TELE

TEXT/CC

OSD

CVBS

+170V0

R

G

B

FILAMENT

54 61 56

IIC

BUS

I/O

PORTS

VST

PWM-

DAC

+

SYNC

3313

+3.3V

56035601

5602

CPU

3318

6318

WP

11 7

+3V3

3605

3

3604

2

1

4

57

1621

58

12MHz

V15

3301

R

V16

3305

G

B

V17

3309

7641
M24C04

EEPROM

(NVM)

ERR

9

36013602

SDA

V7

SCL

V8

9625

0165

AQUADAG

7

R

9

G

3

B

45 68

3319

+3.3V

8
6
5

36423643

SDA

A3
A5

SCL

Std_Con

A1

VOLUME

SDAM

VG2 FOCUS EHT

A6

CRT
(9P)

25kV

POWER SUPPLY

A1

90VAC-130VAC
low range

Degaussing

1511

2521

7523

3528

SYNC.

A4

1512

3527

3523

3525

3522

6500

6502

P6

3503

t

P1

6501

2504

6503

7521

D

G

S

P5

3526

3581

HOT GROUND COLD GROUND

Coil

5502

1500

T4E

7520

14

TEA1506

3506

DRAIN

11

2

Vcc

6

CTRL

CONTROL

IC

DRIVER

SENSE

DEMAG

9

7

P4

6520

1

2

3

5

6

6522

4

3

5520

1515

43

2

1

11

10

8

7

1

7515
TCET1103

2

7580

ENERGIZING

CIRCUIT
(optional)

5562

5560

RESERVED

-12V

6562

6561

6560

7540, 6540

REFERENCE

7541

CIRCUIT

+3V3A

STANDBY

CIRCUIT

7200-D
TDA93XX

VIDEO

INTERNAL

H/V SYNC

SEPERATOR

H-OSC

+PLL

P2

3549

3543

3544

7451

5563

MAIN SUPPLY

Vaudio

P3

Std_Con

EHT

EHT0

36

A2

A2

A4

H

V

34

H-DRIVE

2nd LOOP

H-SHIFT

V-D RVE

+

GEOMETRY

EW

+

GEOMETRY

H-DRIVE

33

V2

V-DRIVE -

22

V-DRIVE +

21

20

2490

A2

Vaudio

FILAMENT

DEFLECTION

Hflybk

-12V

7422

A2

D4

7461

D5

7423

3425

3424

3463

3423

6423

7462

3465

5421

LINE

2428

FRAME

BUT11APX

D2

MAINSUPPLY

7466

7463

-12V

5441

2423

0221
1

4

2406

5401 3402

1402
1

2

1

7

2

HOR.
DEFL.
COIL

VERT.
DEFL.
COIL

D3

7421

A1

6422

D1

3403

7464

D7

3470

7465

3464

3474

EHT

10

9

8

5

4

FOCUS VG2

3447

3451

2455

3448

6447

3445

6446

3443

3444

3446

6463

2465

3410

6451

6452

3459

6448

6444

2460

3475

6461

6462

D8

D9

D10

EHT

FOCUS

VG2

EHT

EHT 0

BEAM­LIMIT

+160VD

VT SUPPLY

-12V

FILAMENT

FRAME OUT

A1

A4

A4

+160VD

A6
A2

A4

1400

A3

FILAMENT

E_14560_017.eps

1

2

3

240304

Block Diagrams, Testpoint Overviews, and Waveforms

pp

pp

)

pp

pp

(

,

,

pp

pp

)

,

,

pp

pp

pp

)

I2C and Supply Voltage Overview

EN 12L03.2L AA 6.

POWER SUPPLY

A1

90VAC-130VAC
low range

2521

3528

Degaussing

1511

7523

Coil

3506

6520

1500

T4E

7520
TEA1506

2

Vcc

6

CTRL

1512

5502

DRAIN

DRIVER

SENSE

DEMAG

CONTROL

IC

DEFLECTION

A2

CIRCUIT
(optional)

5562

5560

RESERVED

-12V -12V

6562

6561

6560

7540, 6540

REFERENCE

CIRCUIT

+3V3A

7541

STANDBY

CIRCUIT

3549

5563

3543

3544

7451

EHT

Std_Con

Vaudio

A2

+3V3A

A4

1x
2x

-12V

H-DRIVE

Vaudio

MAINSUPPLYMAINSUPPLY

FILAMENT

V-DRIVE-

V-DRIVE+

7422

7461

7423

3425

3424

3463

3423

6423

7462

3465

5421

2428

FRAME

BUT11APX

7463

7466

-12V

7421

7464

7465

3403

3470

3464

3474

6422

5401

2423

1402
1

2

0221
1

4

2406

3402

1

7

2

HOR.
DEFL.
COIL

5441

VERT.
DEFL.
COIL

EHT

FOCUS VG2

10

3447

3451

6447

9

6446

8

3443

5

3444

3446

4

2455

3448

3445

6463

2465

3410

6451

6452

3459

6448

6444

2460

3475

EHT

EHT 0

BEAM­LIMIT

6461

6462

EHT

FOCUS

VG2

A1

A4

A4

FRAME OUT

+160VD

VT SUPPLY

-12V

FILAMENT

A4

+160VD

FILAMENT

A3

A6

1400

2

3

VT SUPPLY

7580

1515

43

3503

t

6501

6500

6503

6502

3527

14

3523

11

3525

9

3522

7

7521

G

D

S

3526

HOT GROUND COLD GROUND

2504

1

2

3

5

6

3581

6522

2

5520

4

3

1

11

10

8

7

1

7515
TCET1103

2

ENERGIZING

B1

1300

7

8

-12V

FILAMENT

CRT

EHT

FOCUS

VG2

170 V0

3313

1x

3x

2x

To VIDEO
OUTPUTS

FILAMENT

I2C BUS INTERCONNECTION DIAGRAM

VIDEO PROCESSING

A4

SDA

7200-B

SET

PROCESSOR

PAR T O F

VIDEO-

PROCESSOR

TDA93XX

ERROR CODE LIST

Error Device Error description Check item Diagram

0 Not a
1 Not a
2 Not a

3 Not a

4 TDA9853H

5 TDA93XX POR 3.3V / 8V Protection 7200
6 I2C bus General I2C bus error 7200
7 Not a
8 Not a
9 M24C16 NVM I2C identification error 7641
10 Tuner Tuner I2C identification error 1000

11 Not a
12 Not a
13 Not a
14 Not applicable DVD I2C identification error - -

licable No Error - ­licable X-Ray Protection (USA
licable Horizontal Protection 7421, 7422, 7423 A2

licable Vertical Protection

licable - - ­licable E/W Protection (Large Screen

licable Black current loop protection
licable MAP I2C identification error (USA)-­licable VC I2C identification error (Eu

3

2

SCL

11

Tone control & Audio processor I2C
identification error 7861

+3.3V

+3.3V

ERR

3602

3605

3604

WP

7421, 2423, 6421, 6422 A2

7461, 7462, 7463, 7464, 7465,
7466 A2

--

3313, 7307, 7308, 7309, 7310,
7311, 7312, 7313, 7314, 7315,
7316, 7317, 7318, CRT B1

--

3601

+3.3V

Stereo/Sap) A5

7541, 7491, 7493, 7496 A4, A1
3604, 3605 A4

3641, 3642, 3643 A4
3003, 3004 A3

3644

EEPROM

7

3643

7641

M24C16

(NVM)

ERR

6

3642

65

9

SDA

SCL

A3

TUNER IF

3003

1000

TUNER
UV1336

ERR

VIDEO PROCESSING

A4

B1

Vaudio

AUDIO BTSC STEREO

A5

DECODER
(economic)

SDA

SCL

3004

45

10

1003

1

2

FOR

COMPAIR

ONLY

3

3865

3866

4038

7861

TDA9853H

AUDIO
PROC.

ERR

4

Vau dio

FILA­MENT

VTSupply-A

3496

6492

1

7494

7493

3

6491

In

3497

4379

3493

7491

3491

3492

7496

3494

+3V3

4491

A1

A2

3495

5482

+8V

+3V3A

+5V

+8V

+8VD

1x

2x

1x

1x

1x

TUNER IF

A3

+ 5 V

VT supply

VT Supply-A

AUDIO PROCESSING

A5

+ 8V

AUDIO AMPLIFIER

A6

Vau dio

+ 5V

FILAMENT

AUDIO FRONT I/O

A7

+ 3V3A

6001

-/C33

5861

+ 5 V

VT supply

41 - 7861

1 - 7901
or
1 - 7902

+ 5V

FILAMENT

+3V3A

F_15380_001.eps

050405

Block Diagrams, Testpoint Overviews, and Waveforms

Testpoint Overview Mono Carrier and CRT Panel

EN 13L03.2L AA 6.

CRT TRACK SIDE VIEWMONO CARRIER TRACK SIDE VIEW

6692

3

1

7521

7520

S

D

G

P6

16

P1

2

P4

5520

6461

D9

V15

3

2

D1

1

LOT

5441

8

9

10

6447

D8

1300

8

231

V14

7

6

5

V16

8

9

10

11

3

V17

4

1302

CRT

Socket

V13

F1

HOT

COLD

AUDIO
PROC.

34

7861

1

A5

23

18

A4

12

V11

V10

V9

6560

P3

6561

11

7

V12

P2

1V / div DC

20µs / div.

V14

7421

B

1622

5
4
3
2
1

3601

V2

3642

V8

3643

3602

7200

VIDEO
PROC.

D2

D3

V7

1000

3

D10

133

21

D5

22

D4

2
1

C

E

7463

EBC

D6

7464

B

1V / div DC

20µs / div.

V16

50V / div DC

20µs / div.

E

D7

C

V2

V12

V13

1V / div DC

20µs / div.

V15

50V / div DC

20µs / div.

V17

50V / div DC

20µs / div.

V7

V8

A4

0.5V / div DC
1ms / div.

A5

0.5V / div DC
1ms / div.

D1 97V DC

D2

5V / div AC

20µs / div.

D3

100V / div DC

20µs/div.

D4

0.5V / div DC
5ms / div.

D5

0.5V / div DC
5ms / div.

3264

D6

1V / div AC

5ms / div.

D7

20V / div DC

5ms / div.

11

D8

50V / div DC

20µs / div.

1000

TUNER

D9

10V / div DC

20µs / div.

1

T1

D10

2V / div DC

20µs / div.

F1

1V / div AC

2ms / div.

0,5V / div DC

20µs / div.

V9

1V / div DC

20µs / div.

P1

50V / div DC

5µs / div.

0.5V / div DC
20µs / div.

V10

1V / div DC

20µs / div.

P2 97V DC
P3 13V5 DC
P4 17V8 DC

0,5V / div DC

20µs / div.

V11

1V / div DC

20µs / div.

P5

100V / div DC

5µs / div.

P6

2V / div DC

5µs / div.

T1

200mV / div AC

20µs / div.

E_14560_019.eps

180304