PHILIPS L03.2U AA Diagram

Color Television Chassis

L03.2U

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 6

4. Mechanical Instructions 7

5. Service Modes, Error Codes, and Fault Finding 8

6. Block Diagrams, Test Point Overviews, and

Waveforms

Block Diagram 13
I2C and Supply Voltage Overview 14
Testpoint Overview Mono Carrier and CRT Panel15

7. Circuit Diagrams and PWB Layouts Diagran PWB
Mono Carrier: Power Supply (A1) 16 23-26
Mono Carrier: Deflection (A2) 17 23-26
Mono Carrier: Tuner IF (A3) 18 23-26
Mono Carrier: Video Processing (A4) 19 23-26
Mono Carrier: Audio BTSC Stereo Decoder(A5) 20 23-26
Mono Carrier: Audio Ampl & Sound Proc. (A6) 21 23-26
Mono Carrier: Front I/O, Control & HP (A7) 22 23-26
CRT Panel (B) 27 28

8. Alignments 29

9. Circuit Descriptions, List of Abbreviations, and IC
Data Sheets 36
Abbreviation List 39
IC Data Sheets 40

10. Spare Parts List 41

11. Revision List 44

©

Copyright 2006 Philips Consumer Electronics B.V. Eindhoven, The Netherlands.
All rights reserved. No part of this publication may be reproduced, stored in a
retrieval system or transmitted, in any form or by any means, electronic,
mechanical, photocopying, or otherwise without the prior permission of Philips.

Published by WS 0665 BG CD Customer Service Printed in the Netherlands Subject to modification EN 3122 785 14561

EN 2 L03.2U AA1.

Technical Specifications, Connections, and Chassis Overview

1. Technical Specifications, Connections, and Chassis Overview

Index of this chapter:

1.1 Technical Specifications

1.2 Connections

1.3 Chassis Overview

1.1 Technical Specifications

1.1.1 Reception

Tuning system : PLL
Color systems : NTSC M
Sound systems : Mono, or

: BTSC with SAP
A/V connections : NTSC M
Channel selections : 181 Presets/

Channels

: Full-Cable
IF frequency : 45.75 MHz
Aerial input : 75 ohm (F type), Coax

1.1.2 Miscellaneous

Audio output : Mono: 1 Wrms

: Stereo: 2 x 1 Wrms
Mains voltage : 105 - 132 V (± 10 %)
Mains frequency : 50 / 60 Hz (± 5 %)
Ambient temperature : + 5 to + 45 deg. C
Minimum air pressure : 60 kPa (=600 mBar)
Maximum humidity : 90 %
Power consumption : 36 W (13”) to

: 50 W (20”)
Standby Power consumption : < 3 W

1.2.2 Rear Connections

75 Ohm ANT.

Figure 1-2 Rear Connections

FM Ant

1 -F type 75 ohm, coax D

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1.2 Connections

1.2.1 Front Connections

INSTALL/MENU

INSTALL MENU POWER

- VOLUME + CHANNEL

AUDIO L

AUDIO R

- VOLUME +

Figure 1-1 Front Connections

Headphone

Bk - Headphone,

3.5 mm 8 - 600 Ω / 4 mW ot

Audio / Video In

Ye - Video 1 Vpp / 75 ohm jq
Wh - Audio L 0.2 Vrms / 10 kohm jq
Rd - Audio R 0.2 Vrms / 10 kohm jq

CHANNEL

IR LEDVIDEO

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Technical Specifications, Connections, and Chassis Overview

1.3 Chassis Overview

CRT PANEL

B1

EN 3L03.2U 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 L03.2U 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 the following 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 flows. 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 that 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 prevent 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 prevents circuits
from 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 color 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

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Safety Instructions, Warnings, and Notes

EN 5L03.2U AA 2.

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

• Manufactured under license from Dolby Laboratories.
“Dolby”, “Pro Logic” and the “double-D symbol”, are
trademarks of Dolby Laboratories.

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 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

2.4.4 Lead-free Solder

Philips CE is producing lead-free sets (PBF) from 1.1.2005
onwards.

Identification: The bottom line of a type plate gives a 14-digit
serial number. Digits 5 and 6 refer to the production year, digits
7 and 8 refer to production week (in example below it is 1991
week 18).

-6

),

).

E_06532_024.eps

230205

Figure 2-2 Serial number example

Regardless of the special lead-free logo (which is not always
indicated), one must treat all sets from this date onwards
according to the rules as described below.

P

b

Figure 2-3 Lead-free logo

Device Removal

As is the case with any component that is being removed, it is
essential when removing an (LF)BGA, that 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 risk 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 been 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
aligned under a microscope or magnifying glass. If this is not
possible, try to align the (LF)BGA with any board markers.
So as not to damage neighboring 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 “Repair downloads”. Here you will find Information
on how to deal with BGA-ICs.

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 a solder-tip temperature of at least 400°C.
– To stabilize the adjusted temperature at the solder-tip.
– To exchange solder-tips for different applications.

• Adjust your solder tool so that a temperature of around
360°C - 380°C is reached and stabilized 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 increase 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 this cannot be avoided, carefully
clean 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
shortly 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!

EN 6 L03.2U AA3.

Directions for Use

• 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 "Repair downloads".
For additional questions please contact your local repair help
desk.

2.4.5 Alternative BOM identification

In September 2003, Philips CE introduced a change in the way
the serial number (or production number, see Figure 2-2) is
composed. From this date on, the third digit in the serial
number (example: AG2B0335000001) indicates the number of
the alternative BOM (Bill of Materials used for producing the
specific model of TV set). It is possible that the same TV model

on the market is produced with e.g. two different types of
displays, coming from two different O.E.M.s.
By looking at the third digit of the serial number, the service
technician can see if there is more than one type of B.O.M.
used in the production of the TV set he is working with. He can
then consult the At Your Service Web site, where he can type
in the Commercial Type Version Number of the TV set (e.g.
28PW9515/12), after which a screen will appear that gives
information about the number of alternative B.O.M.s used.
If the third digit of the serial number contains the number 1
(example: AG1B033500001), then there is only one B.O.M.
version of the TV set on the market. If the third digit is a 2
(example: AG2B0335000001), then there are two different
B.O.M.s. Information about this is important for ordering

the correct spare parts!

For the third digit, the numbers 1...9 and the characters A...Z
can be used, so in total: 9 plus 26 = 35 different B.O.M.s can
be indicated by the third digit of the serial number.

2.4.6 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.

3. Directions for Use

You can download this information from the following websites:

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

4. Mechanical Instructions

Mechanical Instructions

EN 7L03.2U AA 4.

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 0212.

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

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Figure 4-1 Service Position

EN 8 L03.2U AA5.

Service Modes, Error Codes, and Fault Finding

5. Service Modes, Error Codes, and Fault Finding

Index of this chapter:

5.1 Test Points

5.2 Service Modes

5.3 Problems and Solving Tips

5.4 Service Tools

5.5 Error Codes

5.6 Protections

5.7 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.

Table 5-1 Test Point Overview

TEST POINT CIRCUIT DIAGRAM

P1,P2,P3,P4,P5 POWER SUPPLY A1

D1,D2,D3,D4,D5,D6,D

Deflection A2

7,D8,D9,D10

T1 TUNER & IF A3

V1,V2,V3,V4,V5,V6,V7,

VIDEO PROCESSING A4

V8,V9,V10,V11

A1,A2,A3,A4,A5 AUDIO PROCESSING A5

A7,A8,A9,A10,A11 AUDIO AMPLIFIER +

MONO SOUND
PROCESSING

F1 FRONT IO +

FRONT CONTROL +
HEADPHONE

V12,V13,V14,V15,V16,

CRT PANEL B1

V17

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.

A6

A7

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.

Specifications

• Tuning frequency: 61.25 MHz (channel 3) for NTSC-sets
(Nafta).

• Color system: NTSC-M.

• 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 9625 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 shorten wires 9625 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.

There is also the option of using ComPair, a hardware interface
between a computer (see requirements) and the TV chassis. It
offers the ability of structured trouble shooting, error code
reading and software version readout for all chassis.
Requirements: To run ComPair on a computer (laptop or
desktop) requires, as a minimum, a 486 processor, Windows

3.1 and a CD-ROM drive. A Pentium Processor and Windows
95/98 are however preferred (see also paragraph 5.4).

Table 5-2 SW Cluster

SW
Cluster

L3SUM1 L03UM1 x.y TDA9377 55K

Software
name

UOC type UOC

Diversity

Special
Features

Mono

ROM Size

L3SUN1 L03UN1 x.y TDA9377 55K

ROM Size

Stereo
(non DBX)

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

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

  
  


 
      
 
   



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.

Service Modes, Error Codes, and Fault Finding

EN 9L03.2U AA 5.

• 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.

• 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.

How to Store Settings

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

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.

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.

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.

5.3.2 Sound Problems

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.

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 Service Tools

5.4.1 ComPair

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:

1. 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.

2. ComPair allows very detailed diagnostics (on I
is therefore capable of accurately indicating problem areas.

2

C level) and

EN 10 L03.2U AA5.

Service Modes, Error Codes, and Fault Finding

You do not have to know anything about I2C commands
yourself because ComPair takes care of this.

3. 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/SearchMan electronic manual of the defective
chassis, schematics and PWBs are only a mouse click
away.

Specifications

ComPair consists of a Windows based fault finding program
and an interface box between PC and the (defective) product.
The ComPair interface box is connected to the PC via a serial
(or RS-232) cable.
For this chassis, the ComPair interface box and the TV
communicate via a bi-directional service cable via the service
connector(s).

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

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

2

C/UART bus of the television.

2

2

C/UART level.

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

2

C/UART buses of the TV-set.

• Manually (by asking questions to you): Automatic
diagnosis is only possible if the microcontroller of the
television is working correctly and only to a certain extent.
When this is not the case, ComPair will guide you through
the fault finding 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 fault finding 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.

• ComPair Interface Box: 4822 727 21631.

• AC Adapter: T405-ND.

• ComPair Quick Start Guide: ST4190.

• ComPair interface extension cable: 3139 131 03791.

• ComPair UART interface cable: 3122 785 90630.

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

How to Connect

This is described in the chassis fault finding database in
ComPair.

Caution: It is compulsory to connect the TV to the PC as
shown in the picture below (with the ComPair interface in
between), as the ComPair interface acts as a level shifter. If
one connects the TV directly to the PC (via UART), ICs will be
blown!

TO

UART SERVICE

CONNECTOR

PC VCR I2CPower

9V DC

E_06532_021.eps

TO
I2C SERVICE
CONNECTOR

180804

Figure 5-2 ComPair interface connection

How to Order

ComPair order codes (US):

• ComPair Software: ST4191.

Service Modes, Error Codes, and Fault Finding

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 I2C

identification error

5 TDA93XX POR 3.3V / 8V Protection 7200, 7541, 7491, 7493, 7496 A4, A1

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

7 Not applicable - - -

8 Not applicable E/W Protection (Large Screen) - -

9 M24C16 NVM I2C identification error 7641, 3641, 3642, 3643 A4

10 Tuner Tuner I2C identification error 1000, 3003, 3004 A3

11 Not applicable Black current loop protection 3313, 7307, 7308, 7309, 7310, 7311, 7312, 7313,

12 Not applicable MAP I2C identification error (USA) - -

13 Not applicable VC I2C identification error (Eu) - -

14 Not applicable DVD I2C identification error - -

EN 11L03.2U AA 5.

7861 (Stereo/Sap) A5

B1

7314, 7315, 7316, 7317, 7318, CRT

5.6 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) 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.

5.7 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 & 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
& 3450 are defective

EN 12 L03.2U AA5.

Personal Notes:

Service Modes, Error Codes, and Fault Finding

E_06532_012.eps

131004

Block Diagrams, Test Point Overviews, and Waveforms

6. Block Diagrams, Test Point Overviews, and Waveforms

Block Diagram

A7

MONO

V

L

FRONT I/O

STEREO

V

L

R

SY_CVBS_IN

L1_IN

R1_IN

AUDIO PROCESSING (BTSC STEREO DECODER)

A5

7861
TDA9853H

L1_IN

8

26

4

INPUT

SELECT

BTSC STEREO

+

DECODER

ERR

4

A8

R1_IN

A1

AUDIO AMPLIFIER

A6

A5

1

18

38

18

Main_OutL

Main_OutR

A4

A3

A2

3865

3866

SDA

SCL

Main_OutL

Main_OutR

A6

A7

VOLUME

A4

EN 13L03.2U AA 6.

7901 AN7522N (STEREO)

7902 AN7523N (MONO)

2904

2906

6909

3911

1

5

62

4L-

8

9

10 R-

1

12 R+

FILAMENT

L+

L-

R-

R+

3901

A8

A9

A10

A11

HEADPHONE

A7

L+

L-

R-

R+

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

Vaudio

+5V

L+

1900

4

5

1

2

FRONT CONTROL

A7

6692
TSOP1836

F1

1

IR

L

R

LOCAL

KEYBOARD

CHANNEL + / -

VOLUME + / -

POWER (USA only)

A4

KEYBOARD

CONTROL

IR

62

8

7200-B
TDA93XX

ROM
RAM

1/10

PAGES

MEMORY

TELE

TEXT/CC

OSD

CVBS

54 61 56

IIC

BUS

I/O

PORTS

VST

PWM-

DAC

+

SYNC

+3.3V

56035601

5602

CPU

WP

11 7

+3V3

3605

3

3604

2

1

4

57

1621

58

12MHz

SDA

SCL

9625

36013602

7641
M24C04

EEPROM

(NVM)

ERR

9

+3.3V

8
6
5

36423643

SDA

SCL

Std_Con

VOLUME

A3
A5

A1

A6

V7

V8

SDAM

TUNER IF

A3

SDA

A4

SCL

A4

ComPair

CONN.

POWER SUPPLY

A1

90VAC-130VAC
low range

VT_SUPPLY

+5V

1003

1

2

3

Degaussing

1511

2521

7523

3528

SDA

SCL

1000
UV1336

2

Coil

1500

5

T4E

3506

P4

6520

6, 7 9

TV TUNER

ERR

3003

7520
TEA1506

2

Vcc

6

CTRL

VT

10

AGC

1

4

3004

1512

5502

DRAIN

DRIVER

DEMAG

CONTROL

IC

6001
BZX79-C33

IF

14

SENSE

VT_SUPPLY_A

T1

11

TUNER_AGC

3527

3523

11

3525

9

3522

7

1001

6500

6502

P6

IF, VIDEO PROCESSING

A2

G

A4

AM_FM_MONO

+8VD

EHT

+8V

7201

3205

7202

3203

A2

A4

AUDIO CARRIER

FILTER

5201

1201

4.5MHz

A4

A2

SY_CVBS_IN

SYNC.

EHT0

7200-A
TDA93XX

VIF_1

VIF_2

3503

t

6501

6503

7521

3526

23

VIDEO

IF

24

AGC

27

SOUND

FM-DEMOD.

DE-EMPH.

L1_IN

1

2

3

5

6

3581

6522

4

3

5520

(MONO)

1515

43

2

1

1

2

A5
A7

P1

2504

D

S

P5

HOT GROUND COLD GROUND

7580

ENERGIZING

11

10

8

7

7515
TCET1103

VIDEO

PLL

DEMOD.

AUDI O

SWITCH

CIRCUIT
(optional)

35

5562

5560

AMPLIFIER

RESERVED

-12V

6562

6561

6560

7540, 6540

REFERENCE

7541

VIDEO

SOUND

AMPL.

+ AVL

CIRCUIT

+3V3A

STANDBY

CIRCUIT

38

V1

44

P2

3549

5563

MAIN SUPPLY

P3

Vaudio

3543

3544

7451

Std_Con

N.C.

36

40

43

42

7200-D
TDA93XX

SEPERATOR

7200-C
TDA93XX

SWITCHING

VIDEO

FILTERS

VIDEO
IDENT

VIDEO

INTERNAL

H/V SYNC

H-OSC

+PLL

N.C.

OSD

Y

U

V

RGB

MATRIX

RGB

INSERT

BLACK

STRETCH

WHITE

STRETCH

4746 48

I/O

Y-DELAY

R-Y

PAL/NTSC
DECODER

R_SC1_IN_V_IN
G_SC1_IN_Y_IN
B_SC1_IN_U_IN
FBL_SC1_IN

BASE
BAND

B-Y

DELAY

A2

34

H

V

H-DRIVE

2nd LOOP

H-SHIFT

V-D RVE

+

GEOMETRY

EW

+

GEOMETRY

H-DRIVE

33

V2

FILAMENT

V-DRIVE -

22

V-DRIVE +

21

20

2490

R

G

OSD/TEXT/CC

B

45

DEFLECTION

Hflybk

-12V

7422

Vaudio

A2

D4

7461

D5

RGB

CONTROL

INSERT

BLUE

STRETCH

WHITE-P.

ADJ

50

3424

7423

3425

3463

5421

2428

3423

6423

7462

3465

51

52

53

49

LINE

FRAME

7463

3619

3620

V11

3621

BEAM-LIMIT

3624

FRAME_OUT

D3

BUT11APX

D2

MAINSUPPLY

A1

7466

-12V

V9

V10

7421

BLK_IN

RED

GREEN

BLUE

A2

A2

3403

7464

3470

7465

3464

3474

6422

D1

5401 3402

D7

2423

1402
1

2

2406

0221
1

4

1622

1

2

3

4

5

1

7

2

HOR.
DEFL.
COIL

B1

1300

5441

VERT.
DEFL.
COIL

CRT

1

2

3

4

5

6

7

8

V12

V13

V14

+170V0

10

9

8

5

4

+170V0

7308
7313
7314

R

7310
7315
7316

G

7312
7317
7318

B

FILAMENT

EHT

FOCUS VG2

3447

3451

6447

6446

3443

3444

3446

2455

3448

3445

3313

6463

2465

3410

6451

6452

3459

6448

6444

2460

3475

3318

6318

3301

3305

3309

6461

6462

D8

D9

D10

V15

V16

V17

EHT

FOCUS

VG2

FRAME OUT

0165

7

R

9

G

3

B

45 68

EHT

EHT 0

BEAM­LIMIT

+160VD

VT SUPPLY

-12V

FILAMENT

AQUADAG

R

G

B

3319

VG2 FOCUS EHT

A1

A4

A4

+160VD

A3

A6
A2

A4

CRT
(9P)

25kV

1400

1

2

3

FILAMENT

E_14560_017.eps

240304

Block Diagrams, Test Point Overviews, and Waveforms

Error Device Error descr iption 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 Protec tion

7461, 7462, 7463, 7464, 7465,
7466

A2

4 TDA9853H

Tone control & Audio processor I2C
identification error

7861 (Stereo/Sap) A5

5 TDA93X X POR 3.3V / 8V Protection 7200, 7541, 7491, 7493, 7496 A4, A1

6 I2C bus General I2C bus er ror 7200, 3604, 3605 A4

7 Not applicable - - -

8 Not applicable E/W Protection (Large Screen) - -

9 M24C16 NVM I2C identification error 7641, 3641, 3642, 3643 A4

10 Tuner Tuner I2C identification error 1000, 3003, 3004 A3

11 Not applicable Black cur rent loop protection

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

B1

12 Not applicable MAP I2C identification err or (USA) - -

13 Not applicable VC I2C identification error (Eu) - -

14 Not applicable DVD I2C identification err or - -

I2C and Supply Voltage Overview

POWER SUPPLY

A1

A2

EN 14L03.2U AA 6.

DEFLECTION

B1

CRT

Degaussing

90VAC-130VAC
low range

2521

7523

3528

1511

Coil

3506

6520

1500

T4E

7520
TEA1506

2

Vcc

6

CTRL

1512

5502

DRAIN

DRIVER

SENSE

DEMAG

CONTROL

IC

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 3402

2423

1402
1

2

0221
1

4

2406

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

+160VD

VT SUPPLY

-12V

FILAMENT

A4

FILAMENT

A3

A6

1400

2

3

1300

7

8

VT SUPPLY

-12V

FILAMENT

EHT

FOCUS

VG2

3313

1x

3x

2x

170 V0

To VIDEO
OUTPUTS

FILAMENT

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

I2C BUS INTERCONNECTION DIAGRAM

VIDEO PROCESSING

A4

7200-B

SET

PROCESSOR

PART OF

VIDEO-

PROCESSOR

TDA93XX

ERROR CODE LIST

SDA

3

2

SCL

11

+3.3V

3605

3604

WP

3602

+3.3V

+3.3V

3644

3601

EEPROM

7

3643

7641

M24C04

(NVM)

ERR

9

3642

VIDEO PROCESSING

B1

A4

Vaudio

TUNER IF

A3

ERR

6

SDA

SCL

3003

65

1000

TUNER
UV1336

ERR

10

3004

45

FOR

COMPAIR

ONLY

1003

1

2

3

A5

SDA

SCL

AUDIO BTSC STEREO
DECODER
(economic)

3865

3866

4038

7861

TDA9853H

AUDIO
PROC.

ERR

4

Vaudio

FILA­MENT

VTSupply-A

3496

6492

1

7494

7493

4379

3493

3497

3491

3494

3

6491

3492

7496

A1

A2

3495

5482

In

7491

4491

+8V

+3V3

+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

Vaudio

+ 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

E_14560_020.eps

240304