Philips LC8.1E LB Schematic

Colour Television Chassis

MG8

LC8.1E

LB

MG8

I_18170_000.eps

300708

Contents Page Contents Page

1. Technical Specifications, Connections, and Chassis
Overview 2

2. Safety Instructions, Warnings, and Notes 5

3. Directions for Use 6

4. Mechanical Instructions 7

5. Service Modes, Error Codes, and Fault Finding 12

6. Block Diagrams, Test Point Overview, and

Waveforms

Wiring Diagram 32" (MG8) 23
Wiring Diagram 42" (MG8) 24
Block Diagram Video 25
Block Diagram Audio 26
Block Diagram Control & Clock Signals 27
SSB: Test Points (Overview Bottom Side) 28-30
I2C IC Overview 31
Supply Lines Overview 32

7. Circuit Diagrams and PWB Layouts Diagram PWB
SSB: DC/DC (B01) 33 47-51
SSB: Tuner IF & SAWF (B02) 34 47-51
SSB: Micro Processor NVM (B03) 35 47-51
SSB: TDA154XX (B04A) 36 47-51
SSB: DDR Flash Trap (B04B) 37 47-51
SSB: LVDS Connectors (B04C) 38 47-51
SSB: SMIC L (B05A) 39 47-51
SSB: Audio Class D (B05B) 40 47-51
SSB: YPBPR & SVHS (B06A) 41 47-51
SSB: IO Scart 1 (B06B) 42 47-51
SSB: Scart2 & UART & JTAG (B06C) 43 47-51
SSB: HDMI (B06D) 44 47-51
SSB: SRP List Explanation 45
SSB: SRP List 46
Keyboard Control Panel (E) 52 52
IR & LED Panel (J) 53 54

8. Alignments 55

9. Circuit Descriptions, Abbreviation List, and IC Data
Sheets 58
Abbreviation List 63
IC Data Sheets 65

10. Spare Parts List & CTN Overview 71

11. Revision List 71

©

Copyright 2008 Koninklijke Philips Electronics N.V.
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 TY 0872 BU TV Consumer Care Printed in the Netherlands Subject to modification EN 3122 785 18171

EN 2 LC8.1E LB1.

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

Notes:

• Figures can deviate due to the different set executions.

• Specifications are indicative (subject to change).

1.1 Technical Specifications

1.1.1 Vision

Display type : LCD
Screen size : 32" (82 cm), 16:9

Resolution (HxV pixels) : 1366 × 768
Dyn. contrast ratio : 24000:1
Min. light output (cd/m
Typ. response time (ms) : 6
Viewing angle (HxV degrees) : 176 × 176
Tuning system : PLL
Presets/channels : 99 presets
Tuner bands : VHF, UHF, S, H
TV Colour systems : PAL B/G, D/K, I

Video playback : NTSC

Supported computer formats : 640 × 480

Supported video formats : 480i @ 60 Hz

2

) : 500

: 42" (107 cm), 16:9

: SECAM B/G, D/K, L/L’

: PAL
: SECAM

: 720 × 480
: 800 × 600
: 1024 × 768
: 1280 × 720

: 480p @ 60 Hz
: 576i @ 50 Hz
: 576p @ 50 Hz
: 720p @50, 60 Hz
: 1080i @ 50, 60 Hz
: 1080p @ 24, 25, 30,

50, 60 Hz

1.1.3 Miscellaneous

Power supply:

- Mains voltage (V

- Mains frequency (Hz) : 50 / 60

Ambient conditions:

- Temperature range (°C) : +5 to +35

- Maximum humidity : 90% R.H.

Power consumption (values are indicative)

- Normal operation (W) : ≈ 130 (32")

- Stand-by (W) : < 0.15

Dimensions (W × H × D mm) : 809 × 544 × 92 (32")

Weight incl. packaging (kg) : 18 (32")

) : 220 - 240

AC

: ≈ 200 (42")

: 1033 × 667 × 88 (42")

: 39 (42")

1.1.2 Sound

Sound systems : Nicam Stereo
Maximum power (W

):2 × 10

RMS

Technical Specifications, Connections, and Chassis Overview

EN 3LC8.1E LB 1.

1.2 Connection Overview

12

SERV. U

Ω

75

TV ANTENNA

3

HDMI

EXT 1

EXT 2

(RGB/CVBS)

(CVBS)

4

5

Figure 1-1 Side and rear I/O 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, and Ye= Yellow.

1.2.1 Connections

1 - Aerial - In

- - IEC-type (EU) Coax, 75 ohm D

6

7

8

YPbPr

9

10

I_18170_027.eps

060808

4 - EXT2: CVBS - In/Out, Audio - In/Out

21

20

E_06532_001.eps

2

1

050404

Figure 1-2 SCART connector

1 -Audio R 0.5 V
2 -Audio R 0.5 V
3 -Audio L 0.5 V

/ 1 kohm k

RMS

/ 10 kohm j

RMS

/ 1 kohm k

RMS

4 -Ground Gnd H
5 -Ground Gnd H
6 -Audio L 0.5 V

/ 10 kohm j

RMS

7-n.c.
8 -Function Select 0 - 2 V: INT

4.5 - 7 V: EXT 16:9

9.5 - 12 V: EXT 4:3 j

9 - Ground Gnd H
10 - n.c.
11 - n.c
12 - n.c.
13 - Ground Gnd H
14 - Ground Gnd H
15 - Video/C 0.7 V
16 - n.c.

/ 75 ohm j

PP

17 - Ground Gnd H
18 - Ground Gnd H
19 - Video CVBS 1 V
20 - Video CVBS 1 V
21 - Shield Gnd H

/ 75 ohm k

PP

/ 75 ohm j

PP

5 - EXT1: Video RGB - In, CVBS - In/Out, Audio - In/Out

2 - Service Connector (UART)

1 -UART_TX Transmit k
2 -Ground Gnd H
3 -UART_RX Receive j

3 - HDMI: Digital Video, Digital Audio - In

1 -D2+ Data channel j
2 -Shield Gnd H
3 -D2- Data channel j
4 -D1+ Data channel j
5 -Shield Gnd H
6 -D1- Data channel j
7 -D0+ Data channel j
8 -Shield Gnd H
9 -D0- Data channel j
10 - CLK+ Data channel j
11 - Shield Gnd H
12 - CLK- Data channel j
13 - CEC Control channel jk
14 - n.c.
15 - DDC_SCL DDC clock j
16 - DDC_SDA DDC data jk
17 - Ground Gnd H
18 - +5V j
19 - HPD Hot Plug Detect j
20 - Ground Gnd H

21

20

E_06532_001.eps

2

1

050404

Figure 1-3 SCART connector

1 - Audio R 0.5 V
2 - Audio R 0.5 V
3 - Audio L 0.5 V
4 - Ground Gnd H

/ 1 kohm k

RMS

/ 10 kohm j

RMS

/ 1 kohm k

RMS

5 - Ground Gnd H
6 - Audio L 0.5 V
7 - Video Blue 0.7 V
8 - Function Select 0 - 2 V: INT

/ 10 kohm j

RMS

/ 75 ohm j

PP

4.5 - 7 V: EXT 16:9

9.5 - 12 V: EXT 4:3 j

9 - Ground Gnd H
10 - n.c.
11 - Video Green 0.7 V
12 - n.c.

/ 75 ohm j

PP

13 - Ground Gnd H
14 - Ground Gnd H
15 - Video Red 0.7 V

/ 75 ohm j

PP

16 - Status/FBL 0 - 0.4 V: INT

1 - 3 V: EXT / 75 ohm j
17 - Ground Gnd H
18 - Ground Gnd H
19 - Video CVBS 1 V
20 - Video CVBS 1 V

/ 75 ohm k

PP

/ 75 ohm j

PP

21 - Shield Gnd H

EN 4 LC8.1E LB1.

Technical Specifications, Connections, and Chassis Overview

6 - S-Video (Hosiden): Video Y/C - In

1 - Ground Y Gnd H
2 - Ground C Gnd H
3 - Video Y 1 V
4 - Video C 0.3 V

7, 8 - Cinch: Video CVBS - In, Audio - In

Ye - Video CVBS 1 V
Wh - Audio L 0.5 V
Rd - Audio R 0.5 V

/ 75 ohm j

PP

P / 75 ohm j

PP

/ 75 ohm jq

PP

/ 10 kohm jq

RMS

/ 10 kohm jq

RMS

1.3 Chassis Overview

MAIN POWER

A

SUPPLY PANEL

KEYBOARD CONTROL

E

PA NE L

9 - Cinch: Video YPbPr - In, Audio - In

Gn - Video Y 1 V
Bu - Video Pb 0.7 V
Rd - Video Pr 0.7 V
Wh - Audio L 0.5 V
Rd - Audio R 0.5 V

10 - Head phone - Out

Bk - Head phone 32 - 600 ohm / 10 mW rt

/ 75 ohm jq

PP

/ 75 ohm jq

PP

/ 75 ohm jq

PP

/ 10 kohm jq

RMS

/ 10 kohm jq

RMS

SMALL SIGNAL

BOARD

B

IR & LED PANEL

J

Figure 1-4 PWB/CBA locations

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Safety Instructions, Warnings, and Notes

2. Safety Instructions, Warnings, and Notes

EN 5LC8.1E LB 2.

Index of this chapter:

2.1 Safety Instructions

2.2 Warnings

2.3 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.

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 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 MΩ and 12 MΩ.

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 Warnings

• 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.

• 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
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.

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 kΩ).

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

• All capacitor values are given in micro-farads (μ=× 10
nano-farads (n =× 10

• 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 BGA (Ball Grid Array) ICs

Introduction

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.

BGA Temperature Profiles

For BGA-ICs, you must use the correct temperature-profile,
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.

2.3.4 Lead-free Soldering

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
clear the solder-joint from old tin and re-solder with new tin.

-9

), or pico-farads (p =× 10

-12

-6

),

).

EN 6 LC8.1E LB3.

2.3.5 Alternative BOM identification

It should be noted that on the European Service website,

“Alternative BOM” is referred to as “Design variant”.

The third digit in the serial number (example:
AG2B0335000001) indicates the number of the alternative
B.O.M. (Bill Of Materials) that has been used for producing the
specific TV set. In general, 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 suppliers. This will then
result in sets which have the same CTN (Commercial Type
Number; e.g. 28PW9515/12) but which have a different B.O.M.
number.
By looking at the third digit of the serial number, one can
identify which B.O.M. is used for the TV set he is working with.
If the third digit of the serial number contains the number “1”
(example: AG1B033500001), then the TV set has been
manufactured according to B.O.M. number 1. If the third digit is
a “2” (example: AG2B0335000001), then the set has been
produced according to B.O.M. no. 2. 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.

Identification: The bottom line of a type plate gives a 14-digit
serial number. Digits 1 and 2 refer to the production center (e.g.
AG is Bruges), digit 3 refers to the B.O.M. code, digit 4 refers
to the Service version change code, digits 5 and 6 refer to the
production year, and digits 7 and 8 refer to production week (in
example below it is 2006 week 17). The 6 last digits contain the
serial number.

Directions for Use

MODEL :

PROD.NO:

2.3.6 Board Level Repair (BLR) or Component Level Repair (CLR)

If a board is defective, consult your repair procedure to decide
if the board has to be exchanged or if it should be repaired on
component level.
If your repair procedure says the board should be exchanged
completely, do not solder on the defective board. Otherwise, it
cannot be returned to the O.E.M. supplier for back charging!

2.3.7 Practical Service Precautions

• It makes sense to avoid exposure to electrical shock.

• Always respect voltages. While some may not be

32PF9968/10

AG 1A0617 000001

Figure 2-1 Serial number (example)

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.

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.

MADE IN BELGIUM

220-240V 50/60Hz

~

VHF+S+H+UHF

BJ3.0E LA

S

E_06532_024.eps

128W

260308

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

Index of this chapter:

4.1 Cable Dressing

4.2 Service Positions

4.3 Assy/Panel Removal MG8 Styling

4.4 Set Re-assembly

Notes:

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

4.1 Cable Dressing

Mechanical Instructions

EN 7LC8.1E LB 4.

Figure 4-1 Cable dressing 32" sets

I_18170_029.eps

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EN 8 LC8.1E LB4.

Mechanical Instructions

4.2 Service Positions

For easy servicing of this set, there are a few possibilities
created:

• The buffers from the packaging (see figure “Rear cover”).

• Foam bars (created for Service).

4.2.1 Foam Bars

1

Required for sets

1

42"

Figure 4-2 Cable dressing 42" sets

The foam bars (order code 3122 785 90580 for two pieces) can
be used for all types and sizes of Flat TVs. See figure “Foam
bars” for details. Sets with a display of 42" and larger, require
four foam bars [1]. Ensure that the foam bars are always
supporting the cabinet and never only the display.
Caution: Failure to follow these guidelines can seriously
damage the display!
By laying the TV face down on the (ESD protective) foam bars,
a stable situation is created to perform measurements and
alignments. By placing a mirror under the TV, you can monitor
the screen.

I_18170_030.eps

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E_06532_018.eps

Figure 4-3 Foam bars

171106

Mechanical Instructions

EN 9LC8.1E LB 4.

4.3 Assy/Panel Removal MG8 Styling

Pictures are taken from 32” set.

4.3.1 Rear Cover

Warning: Disconnect the mains power cord before you remove

the rear cover.
You can remove the backcover without removing the stand.

4.3.2 Speakers

Refer to next figure for details.

1. Unplug the connectors [1].

2. Remove the screws [2] and lift the speaker from the back
cover.

1

(

2x

)

2

2

I_17911_001.eps

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4.3.4 Keyboard Control Panel

Refer to next figure for details.

1. Unplug the key board connector from the IR & LED board.

2. Remove the screws [1].

3. Lift the unit and take it out of the set.
When defective, replace the whole unit.

1

1

Figure 4-6 Key Board

4.3.5 Main Power Supply Panel 32"

I_17911_003.eps

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Figure 4-4 Speakers

4.3.3 IR & LED Panel

Refer to next figure for details.

1. Unplug connectors [1].

2. Release the clips and take the panel out.

When defective, replace the whole unit.

1

Refer to next figure for details.

1. Unplug connectors [1].

2. Remove the fixation screws [2].

3. Take the board out.
When defective, replace the whole unit.

2

2

1

2

1

2x

)

2

2

1

1

(

2

I_18170_050.eps

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Figure 4-7 Main Power Supply Panel 32"

I_17911_002.eps

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Figure 4-5 IR & LED Board

EN 10 LC8.1E LB4.

4.3.6 Small Signal Board (SSB)

Mechanical Instructions

Refer to next figure for details.
Caution: it is mandatory to remount all different screws at their
original position during re-assembly. Failure to do so may result
in damaging the SSB.

1. Unplug the LVDS connector [1].
Caution: be careful, as this is a very fragile connector!

2. Unplug the connectors [2].

3. Remove the screws [3].

4. The SSB can now be taken out of the set, together with the
side cover.

5. To remove the side cover, push back the clamp [4] using a
screw driver.

6. Pull the cover sidewards from the SSB.

4.3.7 LCD Panel

Refer to next figures for details.

1. Remove the stand [1].

2. Unplug the LVDS connector [2].

3. Unplug connectors [3] from
– Main Power Supply Panel
– Speakers
– IR & LED Panel.

4. Remove any adhesive tape [4] that prevents cables being
removed from the set.

5. Remove all cables from clamps [5] that prevents them from
being removed from the set.

3

3

2

1

3

2

(

3x

)

3

4

3

I_18170_051.eps

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Figure 4-8 Small Signal Board

6. Remove the VESA stand [6].

7. Remove the Main Power Supply Panel together with it’s
subframe [7].

8. Remove the Small Signal Board together with it’s
subframe [8].

9. Remove the subframe that holds the stand [9].

10. Remove the clamps that secure the LCD Panel [10] and
take the panel out.

6

6

2

8

7

7

8

4

3

7

3

2x)

(

7

4

3

8 8

4

3

5

1 1

4

11

3

3

I_18170_052.eps

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Figure 4-9 LCD Panel -1-

Mechanical Instructions

EN 11LC8.1E LB 4.

1010

10

10

4.4 Set Re-assembly

10

9

9 9

9

Figure 4-10 LCD Panel -2-

99

9

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10

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

Notes:

• While re-assembling, make sure that all cables are placed
and connected in their original position. See figure “Cable
dressing”.

• Pay special attention not to damage the EMC foams on the
SSB shields. Ensure that EMC foams are mounted
correctly.

EN 12 LC8.1E LB5.

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 Service Tools

5.4 Error Codes

5.5 The Blinking LED Procedure

5.6 Software Upgrading

5.7 Fault Finding and Repair Tips

5.1 Test Points

In the chassis schematics and layout overviews, the test points
(Fxxx) are mentioned. In the schematics, test points are
indicated with a rectangular box around “Fxxx” or “Ixxx”, in the
layout overviews with a “half-moon” sign.
As most signals are digital, it will be difficult to measure
waveforms with a standard oscilloscope. Several key ICs are
capable of generating test patterns, which can be controlled via
ComPair. In this way it is possible to determine which part is
defective.

5.2 Service Modes

The Service Mode feature is split into four parts:

• Simplified Service Default Mode (SDM).

• Service Alignment Mode (SAM).

• Customer Service Mode (CSM).

• Computer Aided Repair Mode (ComPair).

SDM and SAM offer features, which can be used by the Service
engineer to repair/align a TV set. Some features are:

• Activates the blinking LED procedure for error identification
when no picture is available (SDM).

• Make alignments (e.g. white tone), (de)select options,
enter options codes, reset the error buffer (SAM).

• Display information (“SAM” indication in upper right corner
of screen, error buffer, software version, options and option
codes, sub menus).

The CSM is a Service Mode that can be enabled by the
consumer. The CSM displays diagnosis information, which the
customer can forward to the dealer or call centre. In CSM
mode, “CSM”, is displayed in the top right corner of the screen.
The information provided in CSM and the purpose of CSM is to:

• Increase the home repair hit rate.

• Decrease the number of nuisance calls.

• Solved customers' problem without home visit.

• B is the region indication: E= Europe, A= AP/China,
U=NAFTA, L= LATAM.

• C is the display indication: L= LCD, P= Plasma.

• D is the language/feature indication: 1= standard, H=1080p
full HD.

• X is the main version number: this is updated with a major
change of specification (incompatible with the previous
software version). Numbering will go from 1 - 9 and A - Z.
– If the main version number changes, the new version

number is written in the NVM.

– If the main version number changes, the default

settings are loaded.

• YY is the sub version number: this is updated with a minor
change (backwards compatible with the previous versions)
Numbering will go from 00 - 99.
– If the sub version number changes, the new version

number is written in the NVM.

– If the NVM is fresh, the software identification, version,

and cluster will be written to NVM.

Display Option Code Selection

When after an SSB or display exchange, the display option
code is not set properly; it will result in a TV with “no display”.
Therefore, it is required to set this display option code after
such a repair.
To do so, press the following key sequence on a standard RC
transmitter: “062598” directly followed by MENU the OSD
“Panel Selection” will displayed on screen and “xxx”, where
“xxx” is a 3 digit decimal value of the panel type: see column
“Display code” in table “Option code overview” (ch. 8), or see
sticker on the side/bottom of the cabinet. When the value
is accepted and stored in NVM, the OSD “Panel Selection” will
be disappear set remain on, to indicate that the process has
been completed.

Display Option

Code

39mm

040

PHILIPS

MODEL:

32PF9968/10

27mm

PROD.SERIAL NO:

AG 1A0620 000001

(CTN Sticker)

E_06532_038.eps

240108

ComPair Mode is used for communication between a computer
and a TV on I

2

C /UART level and can be used by a Service
engineer to quickly diagnose the TV set by reading out error
codes, read and write in NVMs, communicate with ICs and the
uP (PWM, registers, etc.), and by making use of a fault finding
database. It will also be possible to up and download the
software of the TV set via I

2

C with help of ComPair. To do this,
ComPair has to be connected to the TV set via the compare
connector, which will be accessible through the rear of the set
(without removing the rear cover).

5.2.1 General

Some items are applicable to all Service Modes or are general.
These are listed below.

Software Identification, Version, and Cluster

The software ID, version, and cluster will be shown in the main
menu display of SDM, SAM, and CSM.
The screen will show: “AAAABCD X.YY”, where:

• AAAA is the chassis name: LC81.

Figure 5-1 Location of Display Option Code sticker

During this algorithm, the NVM-content must be filtered,
because several items in the NVM are TV-related and not SSB
related (e.g. Model and Prod. S/N). Therefore, “Model” and
“Prod. S/N” data is changed into “See Type Plate”.
In case a call centre or consumer reads “See Type Plate” in
CSM mode, he needs to look to the side/bottom sticker to
identify the set, for further actions.

5.2.2 Service Default Mode (SDM)

Purpose

This simplified SDM mode in LC8.1E LB chassis is used for
Error blinking only.

• Start the blinking LED procedure.

How to Activate

• Press the following key sequence on the remote control
transmitter: “062596” directly followed by the MENU

Service Modes, Error Codes, and Fault Finding

4

r

Y

r

EN 13LC8.1E LB 5.

button (do not allow the display to time out between entries
while keying the sequence).

Note:

No SDM “Service” jumpers in this LC08.1E LB chassis.
No SDM “OSD” menu displayed on screen.

How to Exit

Switch the set to STANDBY by pressing the mains button on
the remote control transmitter or on the television set.
The error buffer will only be cleared when the “clear” command
is used in the SAM menu.

Note:

• If you switch the television set “off” by removing the mains
(i.e., unplugging the television), the television set will
remain in SDM when mains is re-applied, and the error
buffer is not cleared.

• In case the set is in Factory mode by accident (with “F”
displayed on screen), by pressing and hold “VOL-” and
“CH-” together should leave Factory mode.

5.2.3 Service Alignment Mode (SAM)

Purpose

• To change option settings.

• To display / clear the error code buffer.

• To perform alignments.

Specifications

• Software version, error codes, and option settings display.

• Error buffer clearing.

• Option settings.

• Software alignments (Tuner, White Tone).

• ISP Mode (ComPair Mode) switching.

How to Activate

To activate SAM, use one of the following methods:

• Press the following key sequence on the remote control
transmitter: “062596” directly followed by the OSD/
STATUS/INFO/i+ button (it depends on region which
button is present on the RC). 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.

LC81EL1-1.0 WT- 1.
ERR XX XX XX XX XX
OP XXX XXX XXX XXX XXX XXX XXX

Clea
Options
Tune
RGB Align
ISP Mode

es

Figure 5-2 SAM menu

SAM

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5. 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.

6. Options. Used to set the option bits. See “Options” in the
“Alignments” chapter for a detailed description.

7. Tuner. Used to align the tuner. See “Tuner” in the
“Alignments” chapter for a detailed description.

8. RGB Align. Used to align the White Tone. See “White
Tone” in the “Alignments” chapter for a detailed
description.

9. ISP Mode. Can be used to switch the television to “In
System Programming” mode (ISP), for software uploading
via ComPair. Read paragraph “Service Tools” - >
“ComPair”.

Note: When this mode is selected, the TV will be blocked.
Select ISP mode “Off” the TV will be back to normal TV mode.

How to Navigate

• In the SAM menu, select menu items with the MENU UP/
DOWN keys on the remote control transmitter. The
selected item will be indicated.

• 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 sub menu.

• When you press the MENU button twice while in top level
SAM, the set will switch to the normal user menu (with the
SAM mode still active in the background). To return to the
SAM menu press the MENU button twice.

How to Store SAM Settings

To store the settings changed in SAM mode (except the
OPTIONS settings), 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 mains button on
the remote control transmitter or the television set.

Note:

• When the TV is switched “off” by a power interrupt while in
SAM, the TV will show up in “normal operation mode” as
soon as the power is supplied again. The error buffer will
not be cleared.

• In case the set is in Factory mode by accident (with “F”
displayed on screen), by pressing and hold “VOL-” and
“CH-” together should leave Factory mode.

5.2.4 Customer Service Mode (CSM)

Purpose

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

Menu explanation:

1. AAAABCD-X.YY. See paragraph “Service Modes” ->
“General” -> “Software Identification, Version, and Cluster”
for the SW name definition. WT - X.Y. Weltrend standby
microprocessor Software Identification and Version.

2. SAM. Indication of the Service Alignment Mode.

3. ERR (ERR or buffer). Shows all errors detected since the
last time the buffer was erased. Five errors possible.

4. OP (Option Bytes). Used to read-out the option bytes. See
“Options” in the Alignments section for a detailed
description. Seven codes are possible.

Specifications

• Ignore “Service unfriendly modes”.

• Line number for every line (to make CSM language
independent).

• Set the screen mode to full screen (all contents on screen
are viewable).

• After leaving the Customer Service Mode, the original
settings are restored.

• Possibility to use “CH+” or “CH-” for channel surfing, or
enter the specific channel number on the RC.

EN 14 LC8.1E LB5.

6

4

Service Modes, Error Codes, and Fault Finding

How to Activate

To activate 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). Upon
entering the Customer Service Mode, the following screen will
appear:

1 MODEL : 32PFL5403/12
2 PROD S/N : AG1A083112345
3 SW ID : LC81EL1-1.0 WT - 1.
4 OP : 3 2 0 255 8 0 1
5 CODES : 0 0 0 0 0
6 SSB : XXXXXXXXXXXXXX
7 NVM : 1.4
8 DISPLAY : XXXXXXXXXXXXXX

Page Down :

CSM

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Figure 5-3 CSM menu -1- (example)

9 TUNER : Tuned
10 SYSTEM : PAL
11 SOUND : Nicam Stereo
12 HDAU : No
13 FORMAT : 576I
14 :
15 :
16 :
17 :

Page Up :

CSM

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• Press the MENU button once, or POWER button on the
remote control transmitter.

• Press the POWER button on the television set.

5.3 Service Tools

5.3.1 ComPair

Introduction

ComPair (Computer Aided Repair) is a Service tool for Philips
Consumer Electronics products and offers the following:

1. ComPair helps you to quickly get an understanding on how
to repair the chassis in a short and effective way.

2. ComPair allows very detailed diagnostics and is therefore
capable of accurately indicating problem areas. You do not
have to know anything about I2C or UART 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 uP
is working) and all repair information is directly available.

4. ComPair features TV software up possibilities.

Specifications

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

How to Connect

This is described in the ComPair chassis fault finding database.

TO TV

TO

UART SERVICE

CONNECTOR

I2C SERVICE
CONNECTOR

TO

TO

UART SERVICE

CONNECTOR

Figure 5-4 CSM menu -2- (example)

Menu Explanation

1. MODEL. Type number, e.g. 32PFL5403/12. (*)

2. PROD S/N. Product serial no., e.g. AG1A0831123456. (*)

3. SW ID. Software cluster and version is displayed.

4. OP. Option code information.

5. CODES. Error buffer contents.

6. SSB. Indication of the SSB factory ID (= 12nc). (*)

7. NVM. The NVM software version no.

8. DISPLAY. Indication of the display ID (=12 nc).

9. TUNER. Indicates the tuner signal condition: “Weak” when
signal falls below threshold value, “Medium” when signal is
at mid-range, and “Strong” when signal falls above
threshold value.

10. SYSTEM. Gives information about the video system of the
selected transmitter (PAL/SECAM/NTSC).

11. SOUND. Gives information about the audio system of the
selected transmitter (MONO/STEREO/NICAM).

12. HDAU. HDMI audio stream detection. “YES” means audio
stream detected. “NO” means no audio stream present.
Only displayed when HDMI source is selected.

13. FORMAT. Gives information about the video format of the
selected transmitter (480i/480p/720p/1080i).

14. Reserved.

15. Reserved.

16. Reserved.

17. Reserved.

(*) If an NVM IC is replaced or initialised, the Model Number,
Serial Number, and SSB Code Number must be re-written to
the NVM. ComPair will foresee in a possibility to do this.

ComPair II

RC in

Optional

Switch

Power ModeLink/

Activity

HDMI

2

I

C only

RC out

Multi

function

2

C

I

PC

ComPair II Developed by Philips Brugge

Optional power

5V DC

RS232 /UART

E_06532_036.eps

150208

Figure 5-5 ComPair II interface connection

Caution: It is compulsory to connect the TV to the PC as

shown in the picture above (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!

How to Exit

To exit CSM, use one of the following methods:

Service Modes, Error Codes, and Fault Finding

EN 15LC8.1E LB 5.

How to Order

ComPair II order codes:

• ComPair II interface: 3122 785 91020.

• The latest ComPair software can be found on the Philips
Service website.

• ComPair UART interface cable: 3138 188 75051 (to be
used for upgrading the Main software).

In the unlikely event that the Standby software should be
upgraded, you will be informed via the appropriate channels
(Philips Service website). To upgrade:

• Remove backcover of set.

•Use ComPair I

•Use ComPair I

2

C interface cable: 3122 785 90004.

2

C adapter cable: 3139 131 03791.
Note: If you encounter any problems, contact your local
support desk.

5.3.2 LVDS Tool

Support of the LVDS Tool has been discontinued.

5.4 Error Codes

5.4.1 Introduction

Error codes are required to indicate failures in the TV set. In
principle a unique error code is available for every:

• Activated protection.

• Failing I

• General I
The last errors, stored in the NVM, are shown in the Service
menu’s. This is called the error buffer.
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.
An error will be added to the buffer if this error differs from any
error in the buffer. The last found error is displayed on the left.
An error with a designated error code may never lead to a
deadlock situation. This means that it must always be
diagnosable (e.g. error buffer via OSD or blinking LED
procedure, ComPair to read from the NVM).
In case a failure identified by an error code automatically
results in other error codes (cause and effect), only the error
code of the MAIN failure is displayed.
Example: In case of a failure of the I
code for a “General I
displayed. The error code for the single devices (EFFECT) is
not displayed. All error codes are stored in the same error
buffer (TV’s NVM) except when the NVM itself is defective.

2

C device.

2

C error.

2

2

C failure” and “Protection errors” is

C bus (CAUSE), the error

5.4.3 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).

5.4.2 How to Read the Error Buffer

You can read the error buffer in 2 ways:

• On screen via the SAM/CSM (if you have a picture).

Example:

– 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.

EN 16 LC8.1E LB5.

Service Modes, Error Codes, and Fault Finding

Table 5-1 Error code overview

Error code Description Item no. Remarks

1 DC Protection of speakers 7C01 1) TV in protection mode

2 +12V protection error 1) TV in protection mode

2

3I

4 General I2C error 7C01 1) TV turn on without Picture & Sound output from speaker

6I

7I

8I

C Standby uP 7303 1) TV turn on with picture, but without Sound output from speaker

2

C error while communicating with the NVM 7302 1) TV turn on after 3 seconds in Standby mode.

2

C error while communicating with the Tuner. 1104 1) TV turn on after 3 seconds in Standby mode.

2

C error while communicating with the IF

Demodulator.

2) Red LED blinking 1 time (Error 1)
*Error 1 logged in SAM and CSM mode

2) Red LED blinking 2 times (Error 2)
*No error buffer logged in SAM and CSM mode (protect time very short)

2) Red LED blinking 3 times & 4 times (Error 3 & 4)
*No communication between LOCTOP and WT
*First check WT and Second check LOCTOP generical I
*Error 3 logged in SAM and CSM mode

2) Red LED blinking 3 times & 4 times (Error 3 & 4)
*No communication between LOCTOP and WT
*First check WT and second check LOCTOP generical I2C
*No error buffer logged in SAM and CSM mode

2) Power on TV set (RC) again (wait until TV turn on with blud screen displayed)

3) Input RC sequence (062596 + menu)

4) White LED blink 6 times (Error 6)
*No error buffer logged in SAM and CSM mode

2) Power on TV set (RC) again. TV with snow (no video) displayed.

3) Input RC sequence (062596 + menu)

4) White LED blink 7 times (Error 7)
*Error 7 logged in SAM and CSM mode

7401 1) TV turn on after 3 seconds in Standby mode

2) Power on TV set (RC again). (wait for 45 seconds, until the system completed the power on state check)

3) Input RC sequence (062596 + menu)

4) White LED blink 8 times (Error 8)
*Error 8 logged in SAM and CSM mode

2

C

Notes

1. Some of the error codes reported are depending on the
option code configurations.

2. This error means: no I
particular I

2

C bus. Possible causes: SCL/SDA shorted to

2

C device is responding to the

GND, SCL shorted to SDA, or SCL/SDA open (at uP pin).
The internal bus of the NXP (Loctop) platform should not
cause the entire system to halt as such an error can be
reported.

5.4.4 How to Clear the Error Buffer

The error code buffer is cleared in the following cases:

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

remote control transmitter: “062596” directly followed
by the OSD/STATUS/INFO/i+ button (do not allow the
display to time out between entries while keying the
sequence).

– Make sure the menu item CLEAR is selected. Use the

MENU UP/DOWN buttons, if necessary.

– Press the MENU RIGHT button to clear the error

buffer. Press the right button twice (1st is to select the
text “Yes“ on the right side menu and the 2nd press is
to clear the error buffer in NVM the text “CLEARED” will
appear).

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

Note: If you exit SAM by disconnecting the mains from the
television set, the error buffer is not reset.

1.5 seconds in which the LED is “off”. Then this sequence is
repeated.

Example (1): error code 4 will result in four times the sequence
LED “on” for 0.25 seconds / LED “off” for 0.25 seconds. After
this sequence, the LED will be “off” for 1.5 seconds. Any RC5
command terminates the sequence. Error code LED blinking is
in red / White colour (refer to Error codes overview).

Example (2): the content of the error buffer is “1 2 9 6 0 0”
After entering SDM, the following occurs:

• 1 long blinks 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 blinks of 1.5 seconds to finish the sequence,

• The sequence starts again with 12 short blinks.

5.6 Software Upgrading

In this chassis, the following SW “stacks” is used:

• TV main SW (processor and processor NVM).

5.6.1 TV Main SW Upgrade

For instructions on how to upgrade the TV Main software, refer
to ComPair.

5.6.2 Service SSB

5.5 The Blinking LED Procedure

5.5.1 Introduction

The software is capable of identifying different kinds of errors.
Because it is possible that more than one error can occur over
time, an error buffer is available, which is capable of storing the
last five errors that occurred. This is useful if the OSD is not
working properly.
Errors can also be displayed by the blinking LED procedure.
The method is to repeatedly let the front LED pulse with as
many pulses as the error code number, followed by a period of

It should be noted that in this chassis the HDCP-key is
embedded in the main processor. Therefore there is no need
for a separate Service-SSB.

Service Modes, Error Codes, and Fault Finding

5.7 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.

5.7.1 Load Default NVM Values

It is possible to download default values automatically into the
NVM in case a blank NVM is placed or when the NVM first 20
address contents are “FF”. After the default values are
downloaded, it is possible to start-up and to start aligning the
TV set.

Alternative method:

It is also possible to upload the default values to the NVM with
ComPair in case the SW is changed, the NVM is replaced with
a new (empty) one, or when the NVM content is corrupted.
After replacing an EEPROM (or with a defective/no EEPROM ,
default settings should be used to enable the set to start-up and
allow the Service Default Mode and Service Alignment Mode to
be accessed.

5.7.2 Start-up/Shut-down Flowcharts

EN 17LC8.1E LB 5.

On the next pages you will find start-up and shut-down
flowcharts, followed by a trouble shooting flowchart, which
might be helpful during fault finding.
Please note that some events are only related to PDP sets, and
therefore not applicable to this LCD chassis.

EN 18 LC8.1E LB5.

Service Modes, Error Codes, and Fault Finding

AC ON

3V3STBY Available

Weltrend Powered by
3V3_STBY, STANDBY=HIGH

Power_ON_OFF=Low initialize
GPIO pins of Weltrend
Enable Audio mute

STANDBY=Low

Wait for 100ms

Wait for 100ms
Time out = 200ms

Weltrend to go
to Standby

NO

Weltrend reset the LOCTOP
CPU_RST=HIGH

NO

Enable Power Down
Enable DC_PROT INT

Initialize tuner, SMICL,
HDMI_MUX_RST

LCD_POWER_ON=HIGH

Is Power Down
=high?

YES

Wait for 300ms

LOCTOP read the NVM

Last status on?

YES

Wait for 20 ms

Switch ON LVDS Signal

Wait for 1000ms
Init. Warm Component

BL_ON_OFF=HIGH

*BL_ADJ KEEP 100% for
3000ms before dimming

Blank picture
Picture Mode setup & Detection

UnBlank Picture &
Unmute Audio

END

Figure 5-6 Start-up flowchart

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Service Modes, Error Codes, and Fault Finding

Start

Mute Audio
ANTI_PLOP=LOW
MUTEn=HIGH

BL_ON_OFF=LOW

EN 19LC8.1E LB 5.

Note:
Total wait time 232ms iso 320ms

Audio is mute continuously -->

Wait 300ms

Switch OFF LVDS

Wait 20ms

LCD_PWR_ON=LOW

WP for NVM
LOCTOP

Enable Audio mute
Port assignment in STANDBY
( Weltrend)

STANDBY=HIGH

Disable Audio Mute?

END

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Figure 5-7 Stand-by flowchart

EN 20 LC8.1E LB5.

Service Modes, Error Codes, and Fault Finding

Start

END

NO

POWER_DOWN=LOW
for 5 times ?

YES

Mute Audio & Video

WP for NVM
LOCTOP

STANDBY=HIGH

Wait 5000ms

Re-start:Start up

END

Figure 5-8 Power Down flowchart

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Service Modes, Error Codes, and Fault Finding

Start

EN 21LC8.1E LB 5.

END

NO

DC_PROT=Low
for 3seconds?

YES

Mute Audio & Video

WP for NVM

STANDBY=HIGH

END

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Figure 5-9 DC_PROT flowchart

EN 22 LC8.1E LB5.

Personal Notes:

Service Modes, Error Codes, and Fault Finding

E_06532_012.eps

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