Philips LC4.2HE AA Schematic

Colour Television Chassis

LC4.2HE

AA

F_15140_000.eps

210105

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 11

6. Block Diagrams, Testpoint Overviews, and

Waveforms

Wiring Diagram 19
Block Diagram Video 20
Block Diagram Audio & Control 21
Block Diagram Scaler 22
Testpoint Overview TV & Scaler Board 23
Testpoint Overview TV & Scaler Board 24
I2C IC Overview 25
Supply Voltage Overview 26

7. Circuit Diagrams and PWB Layouts Diagram PWB
TV & Scaler Board: Tuner + VIF (A1) 27 39-48
TV & Scaler Board: Hercules (A2) 28 39-48
TV & Scaler Board: Histogram (A3) 29 39-48
TV & Scaler Board: Audio Amplifier (A5) 30 39-48
TV & Scaler Board: TV-Supply (A6) 31 39-48
TV & Scaler Board: Scaler (A7) 32 39-48
TV & Scaler Board: Scaler Interface (A9) 33 39-48
TV & Scaler Board: SDRAM (A10) 34 39-48
TV & Scaler Board: Flash / Control (A11) 35 39-48
TV & Scaler Board: HDMI (A12) 36 39-48
TV & Scaler Board: PCHD-MUX (A13) 37 39-48
TV & Scaler Board: Supply (A14) 38 39-48
Side IO and LKB Panel (D) 49 50-50
Rear IO Panel: Scart (23”/26”) (H1) 51 53
Rear IO Panel: PCHD-IO (23”/26”) (H2) 52 53
I-Board (HC) 54 55
Front IR / LED Panel (J) 56 56

©

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.

LCD Clock Panel (O) 57 N.A.

8. Alignments 59

9. Circuit Descriptions, List of Abbreviations, and IC
Data Sheets 62
Abbreviation list 68
IC Data Sheets 71

10. Spare Parts List 74

11. Revision List 78

Published by BB 0563 TV Service Printed in the Netherlands Subject to modification EN 3122 785 15140

EN 2 LC4.2HE 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 : LCD, S-IPS
Screen size : 23” (59 cm), 16:9

: 26” (66 cm), 16:9
Resolution (HxV pixels) : 1280(*3)x768 WXGA
Contrast ratio : 400:1
Light output (cd/m
Viewing angle (HxV degrees) : 176x176
Tuning system : PLL
TV Colour systems : PAL B/G, D/K, I

Video playback : NTSC M/N 3.58, 4.43

Supported computer formats : WXGA (1280x768)
Channel selections : 100 presets

1.1.2 Sound

Sound systems : FM-mono

Maximum power (W

1.1.3 Miscellaneous

Power supply:

- Mains voltage (V

- Mains frequency (Hz) : 50 / 60

Ambient conditions:

- Temperature range (qC) : +5 to +40

- Maximum humidity : 90% R.H.

Power consumption

- Normal operation (W) : 96 (23 inch)

- Stand-by (W) : < 3

2

) : 450

: SECAM B/G, D/K, L/L’

: PAL B/G

: SECAM L/L’

:VHF

: UHF

: S-band

: Hyper-band

: FM-stereo B/G

: NICAM B/G, D/K, I, L

):2 x 5

RMS

) : 95 - 240

AC

: 110 (26 inch)

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 Side Connections

POWER SUPPLY JACK
TO SMART CARD
EXPRESS BOX

EXTERNAL SPEAKER

RJ48

TO SMART CARD
EXPRESS BOX

RJ12

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Figure 1-1 Side I/O

Power Supply Jack (for smartcard Express Box):

1 -Power out 12 V
2 -Ground Gnd H

Mini Jack: External speaker - Out

1 -Audio out kq
2 -Ground Gnd H

RJ48: To smartcard Express Box

1 - 12 VDC Supply
2 - DGND Digital Gnd
3 - HSYN Signal
4 - VSYN Signal
5 - TXD232 Signal
6 - RXD232 Signal
7 - SDA3_IR-IN Signal
8 - DCM-POR Signal
9 - CVBS terr. Signal
10 - GNDA Analog Gnd

RJ12: To smartcard Express Box

1 - LEDIN_CLK Signal
2 - IRIN_DATA-IN Signal
3 - MODE Signal
4 - STATUS_DATA-

OUT Signal
5 - DGND Gnd
6 - IR OUT Signal

1.2.2 Rear Connections

DC

kq

Dimensions (WxHxD mm) : 690x433x240 (23“)

: 788x504x270 (26“)

Weight (kg) : 11.2 (23 inch)

: 15 (26 inch)

FM ANT SCART 1 SCART 2 AUDIO OUT DVI-DVGA PC AUDIO IN

ERIAL IN

Figure 1-2 Rear I/O

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Technical Specifications, Connections, and Chassis Overview

EN 3LC4.2HE AA 1.

Aerial - In

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

Aerial: FM Radio

- - IEC-type Coax, 75 ohm D

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

21

20

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1

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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 Audio Gnd H

/ 1 kohm k

RMS

/ 10 kohm j

RMS

/ 1 kohm k

RMS

5 - Ground Blue Gnd H
6 - Audio L 0.5 V
7 - Video Blue/U 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 Green Gnd H
10 - n.c.
11 - Video Green/Y 0.7 V
12 - n.c.

/ 75 ohm j

PP

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

/ 75 ohm j

PP

16 - Status/FBL 0 - 0.4 V: INT

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

/ 75 ohm k

PP

/ 75 ohm j

PP

21 - Shield Gnd H

18 - Ground FBL Gnd H
19 - Video CVBS 1 V
20 - Video CVBS/Y 1 V
21 - Shield Gnd H

/ 75 ohm k

PP

/ 75 ohm j

PP

Audio Out Mini Jack: Audio - Out

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

/ 10 kohm k

RMS

/ 10 kohm k

RMS

VGA: Video RGB - In

1

5

6

11

10

15

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Figure 1-5 VGA Connector

1 - Video Red 0.7 V
2 - Video Green 0.7 V
3 - Video Blue 0.7 V

/ 75 ohm j

PP

/ 75 ohm j

PP

/ 75 ohm j

PP

4 - Ground Gnd H
5 - Ground Gnd H
6 - Ground Red Gnd H
7 - Ground Green Gnd H
8 - Ground Blue Gnd H
9 - +5V_DC +5 V

DC

j

10 - Ground Sync Gnd H
11 - Ground Gnd H
12 - DDC_SDA DDC data j
13 - H-sync 0 - 5 V j
14 - V-sync 0 - 5 V j
15 - DDC_SCL DDC clock j

DVI-D: Digital Video - In

18
9 16

17

24

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C5

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Figure 1-6 DVI-D connector

EXT2: Video YC - In, CVBS - In/Out, Audio - In/Out

21

20

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2

1

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Figure 1-4 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 Audio Gnd H
5 - Ground Blue 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 Green Gnd H
10 - P50Line-ITV-IR-Sw
11 - n.c.
12 - n.c.
13 - Ground Red Gnd H
14 - Ground Data Gnd H
15 - C 0.3 V
16 - n.c.

/ 75 ohm j

PP

17 - Ground Video Gnd H

1 - D2- j
2 - D2+ j
3 - Shield Gnd H
4 - D4- j
5 - D4+ j
6 - DDC_SCL DDC clock k
7 - DDC_SDA DDC data jk
8 - n.c.
9 - D1- j
10 - D1+ j
11 - Shield Gnd H
12 - D3- j
13 - D3+ j
14 - +5V j
15 - Ground Gnd H
16 - HPD Hot Plug Detect j
17 - D0- j
18 - D0+ j
19 - Shield Gnd H
20 - D5- j
21 - D5+ j
22 - Shield Gnd H
23 - CLK+ j
24 - CLK- j

Mini Jack: PC Audio - In

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

/ 10 kohm j

RMS

/ 10 kohm j

RMS

EN 4 LC4.2HE AA1.

1.3 Chassis Overview

Technical Specifications, Connections, and Chassis Overview

LCD PANEL

CLOCK PANEL

O

POWER SUPPLY

P

UNIT

Figure 1-7 PWB locations

I BOARD

TV & SCALER

BOARD

SIDE I/O &

LOCAL KEYBOARD

PANEL

IR LED
PANEL

REAR I/O

CINCH PANEL

F_15140_003.eps

HC

A

D

J

H

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Safety Instructions, Warnings, and Notes

2. Safety Instructions, Warnings, and Notes

EN 5LC4.2HE AA 2.

Index of this chapter:

2.1 Safety Instructions

2.2 Warnings

2.3 Notes

2.1 Safety Instructions

Safety regulations require that during a repair:

• Connect the set to the Mains (AC Power) via an isolation

transformer (> 800 VA).

• Replace safety components, indicated by the symbol h,

only by components identical to the original ones. Any
other component substitution (other than original type) may
increase risk of fire or electrical shock hazard.

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

• Route the wire trees correctly and fix them with the

mounted cable clamps.

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

external damage.

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

proper function.

• Check the electrical DC resistance between the Mains (AC

Power) plug and the secondary side (only for sets which
have a Mains (AC Power) isolated power supply):

1. Unplug the Mains (AC Power) cord and connect a wire
between the two pins of the Mains (AC Power) plug.

2. Set the Mains (AC Power) switch to the "on" position
(keep the Mains (AC Power) cord unplugged!).

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

4. Switch "off" the set, and remove the wire between the
two pins of the Mains (AC Power) plug.

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

2.2 Warnings

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

61.25 MHz for NTSC (channel 3).

• Where necessary, measure the waveforms and voltages

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

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

2.3.2 Schematic Notes

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

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

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

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

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

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

2.3.3 Rework on BGA (Ball Grid Array) ICs

General

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

-9

), or pico-farads (p= x10

-12

-6

),

).

• All ICs and many other semiconductors are susceptible to

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

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

– Wristband tester 4822 344 13999.

• Be careful during measurements in the high voltage
section.

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

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

2.3 Notes

2.3.1 General

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

Device Removal

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

Area Preparation

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

Device Replacement

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

EN 6 LC4.2HE AA3.

Directions for Use

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 neighbouring components, it may be
necessary to reduce some temperatures and times.

More Information

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

2.3.4 Lead Free Solder

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

1.1.2005 onwards.

P

b

Figure 2-1 Lead-free logo

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

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

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

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

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

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

- 380°C is reached and stabilised at the solder joint.
Heating time of the solder-joint should not exceed ~ 4 sec.
Avoid temperatures above 400°C, otherwise wear-out of
tips will rise drastically and flux-fluid will be destroyed. To

avoid wear-out of tips, switch “off” unused equipment or
reduce heat.

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

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

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

• For sets produced before 1.1.2005, containing leaded
soldering tin and components, all needed spare parts will
be available till the end of the service period. For the repair
of such sets nothing changes.

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

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

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

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

2.3.5 Practical Service Precautions

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

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

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 Service Position

4.2 Rear Cover Removal

4.3 Power Supply Unit Removal

4.4 TV & Scaler Board Removal

4.5 I/O Panel Removal

4.6 Side I/O & Keyboard Panel and Front LED Panel Removal

4.7 Clock Panel Removal

4.8 I-Board Removal

4.9 Exchanging the LCD Panel

4.10 Re-Assembly

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

Note: To diagnose the set with ComPair it is not needed to
open the set entirely.

1. Manually unlock and remove the cover cap (1). See figure
“TV set rear view”.

2. Break away the protective plate (2) on the I/O panel
bracket to get access to the needed plugs. See figure
“Protective plate”.

2

Mechanical Instructions

1. Carefully pull upwards the cover plate (2) (from its left side)
to unlock it (3) and remove the plate from the stand.

2. Unplug the AC power and the antenna cables.

3. Be sure to remove the coin slotted mounting screw (4) from
the stand.

4. Carefully lift the TV from the swivel base (it uses a vertical
sliding mechanism).

5. Place the TV upside down on a tabletop (use a protection
sheet or foam bars). Take care, that this is flat and free
from obstacles like screws, to prevent damaging the fragile
LCD screen.

Figure 4-3 TV stand removal

EN 7LC4.2HE AA 4.

4

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Figure 4-1 Protective plate

4.1 Service Position

2

Figure 4-2 TV set rear view

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1

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4.1.1 Foam Bars

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Figure 4-4 Foam bars

The foam bars (order code 3122 785 90580) can be used for
all types and sizes of Flat TVs. By laying the plasma or LCD TV
flat on the (ESD protective) foam bars, a stable situation is

3

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created to perform measurements and alignments. By placing
a mirror under the TV, you can easily monitor the screen.

EN 8 LC4.2HE AA4.

Mechanical Instructions

4.2 Rear Cover Removal

3

3

1

2

3

3

1

Figure 4-5 Rear cover removal

1. Manually unlock and remove the top cover cap (5).
See Figure: “TV set rear view”.

2. Make sure all power-, audio-, video- and coax- cables are
unplugged.

3. Remove all Torx screws (1) around the edges of the rear
cover.

4. Remove the four silver coloured Torx screws (2) around
the stand holder. See figure “Rear cover removal”.

5. Carefully use a flat screwdriver to release the clamps (3).
See figure “Rear cover removal”.

6. Remove the rear cover and store it in a safe place.

2

3

3

3

3

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4.4 TV & Scaler Board Removal

1

Figure 4-7 TV & Scaler board shield removal

2

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3

Note: avoid holding the button-area during removal (it can be
easily damaged).

4.3 Power Supply Unit Removal

1

Figure 4-6 Power supply unit

1. Disconnect all cables from the Power supply unit.

2. Remove all mounting screws (1) from the Power supply
unit.

3. Take out the Power supply unit.

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Figure 4-8 TV & Scaler board removal

1. Disconnect all cables from the TV & Scaler board.

2. Remove all shield mounting screws (1) and remove the
shield.

3. Remove the screw from the grounding cable (2).

4. Remove the mounting screw (3) and remove the board.

4.5 I/O Panel Removal

3

1

2

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Figure 4-9 I/O panel removal

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Mechanical Instructions

EN 9LC4.2HE AA 4.

1. Release the two clamps (1) at the I/O panel bracket.
Carefully pull the bracket in the direction (2), as shown at
the figure “I/O panel removal”, and remove it.

2. Disconnect all cables from the I/O panel.

3. Remove all mounting screws from the I/O panel (3).

4. Take out the I/O panel.

4.6 Side I/O & Keyboard Panel and Front LED Panel Removal

4

3

1

2

4.7 Clock Panel Removal

1

2

Figure 4-11 Clock Panel removal

1. Disconnect the cable (1) from the Clock Panel.

2. Remove all mounting screws (2) from the Clock Panel.

3. Take out the Clock Panel.

2

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4

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Figure 4-10 Side I/O & Keyboard panel and

Front LED panel removal

1. Disconnect the cable (1) from the Side I/O & Keyboard

panel.

2. Release the clamp (2) and take out the Front LED panel.

3. Disconnect the cable (3) from the Side I/O & Keyboard

panel.

4. Remove all mounting screws (4) from the Side I/O &

Keyboard panel bracket.

5. Take out the Side I/O & Keyboard panel from the bracket.

4.8 I-Board Removal

1

Figure 4-12 I-Board Removal

1. Disconnect all cables from the I-Board (including its ground
cable).

2. Remove all mounting screws, and bend away the fixation
clamp (1) from the I-Board.

3. Take out the I-Board.

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EN 10 LC4.2HE AA4.

4.9 Exchanging the LCD Panel

Mechanical Instructions

1

1

Figure 4-13 Exchanging the LCD panel

1. Disconnect all cables from the LCD Panel.

2. Remove all mounting screws (1) from the metal cover.

3. Lift and take off the metal cover.

4. Now you can exchange the LCD panel.

4.10 Re-Assembly

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

Notes:

• Do not forget to replace the ground cable of the TV &
Scaler board, while mounting the screw at the board
topside. See figure “TV & Scaler board removal”.

• Make sure the ferrite ring (1) is properly tightened to the clip
(this is only valid for 26 inch sets).

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1

Figure 4-14 Ferrite ring

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Service Modes, Error Codes, and Fault Finding

5. Service Modes, Error Codes, and Fault Finding

EN 11LC4.2HE AA 5.

Index of this chapter:

5.1 Test Points

5.2 Service Modes

5.3 Problems and Solving Tips Related to CSM

5.4 ComPair

5.5 Error Codes

5.6 The Blinking LED Procedure

5.7 Fault Finding and 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. These test points are specifically
mentioned in the service manual as “half moons” with a dot in
the centre.
Perform measurements under the following conditions:

• Television set in Service Default Alignment Mode.

• Video input: Colour bar signal.

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

5.2 Service Modes

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

– Auto Volume Levelling (AVL).

How to enter

To enter SDM, use one of the following methods:

• Press the following key sequence on the remote control
transmitter: “062596” directly followed by the MENU
button (do not allow the display to time out between entries
while keying the sequence).

• Short "Service" jumpers on the TV board during cold start
and apply mains (see Figure "Service jumpers"). Then
press the mains button (remove the short after start-up).
Caution: Entering SDM by shorting "Service" jumpers 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 damage the television set.

• Or via ComPair.

1

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

5.2.1 Service Default Mode (SDM)

Purpose

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

• To override software protections.

• To start the blinking LED procedure.

• To inspect the error buffer.

• To check the life timer.

Specifications

Table 5-1 SDM default settings

Region Freq. (MHz) Default system

Europe, AP-PAL/Multi 475.25 PAL B/G

NAFTA, AP-NTSC, LATAM 61.25 (ch. 3) NTSC M

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

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

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

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

E_14490_056.eps

070504

Figure 5-1 E Service jumpers

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

EN 12 LC4.2HE AA5.

Service Modes, Error Codes, and Fault Finding

00022 LC42HE1 3.0423/S42GV1 1.13 SDM

ERR 0 0 0 0 0

OP 000 057 140 032 120 128 000

Figure 5-2 SDM menu

How to navigate

Use one of the following methods:

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

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

How to exit

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

5.2.2 Service Alignment Mode (SAM)

Purpose

• To change option settings.

• To display / clear the error code buffer.

• To perform alignments.

Specifications

• Operation hours counter (maximum five digits displayed).

• Software version, Error codes, and Option settings display.

• Error buffer clearing.

• Option settings.

• AKB switching.

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

• NVM Editor.

• ComPair Mode switching.

How to enter

To enter SAM, use one of the following methods:

• Press the following key sequence on the remote control
transmitter: “062596" directly followed by the OSD/
STATUS button (do not allow the display to time out
between entries while keying the sequence).

• Or via ComPair.

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

F_15140_008.eps

210105

00022 LC42HE1 3.0423/S42GV1 1.13 SAM
ERR 0 0 0 0 0

OP 000 057 140 032 120 128 000

. Clear Clear ?

. Options
. Tuner
. White Tone
. Audio
. NVM Editor
. SC NVM Editor

. ComPair Mode On

F_15140_009.eps

210105

Figure 5-3 SAM menu

Menu explanation

1. LLLLL. This represents the run timer. The run timer counts
normal operation hours, but does not count standby hours.

2. AAAAABCD-X.Y/ EEEEEE F.GG. This is the software
identification of the main microprocessor followed by the
software identification for the scaler IC:
– A= the project name (LC42H).
– B= the region: E= Europe, A= Asia Pacific, U= NAFTA,

L= LATAM.

– C= the software diversity:

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

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

• Asian Pacific: T= TXT, N= non-TXT, C= NTSC.

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

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

major change that is incompatible with previous
versions).

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

minor change that is compatible with previous

versions).
– EEEEEE= the scaler sw cluster
– F= the main sw version no.
– GG= the sub-version no.

3. SAM. Indication of the Service Alignment Mode.

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

5.

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

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

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

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

9. White Tone. Used to align the white tone. See “White
Tone” in the Alignments section for a detailed description.

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

11. NVM Editor. Can be used to change the NVM data in the
television set. See table “NVM data” further on.

12. SC NVM Editor. Can be used to edit Scaler NVM.

Service Modes, Error Codes, and Fault Finding

13. ComPaIr. Can be used to switch on the television to In
System Programming (ISP) mode, for software uploading
via ComPair.
Caution: When this mode is selected without ComPair
connected, the TV will be blocked. Remove the AC power
to reset the TV.

How to navigate

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

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

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

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

How to store SAM settings

To store the settings changed in SAM mode, 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.
If you turn the television set “off” by removing the mains (i.e.,
unplugging the television) without using the mains button, the
television set will remain in SAM when mains is re-applied, and
the error buffer is not cleared.

5.2.3 Customer Service Mode (CSM)

Purpose

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

How to enter

To enter CSM, press the following key sequence on the remote
control transmitter: “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:

EN 13LC4.2HE AA 5.

1 00022 LC42HE1 3.0423/S42GV1 1.13 CSM

2 CODES 0 0 0 0 0
3 OP 000 057 140 032 120 128 000

4

5
6 NOT TUNED

7 PAL

8 STEREO

9 CO 50 CL 50 BR 50
0 AVL On

F_15140_010.eps

Figure 5-4 CSM menu

Menu explanation

1. Indication of the decimal value of the operation hours
counter, Software identification of the main microprocessor
(see "Service Default or Alignment Mode" for an
explanation), and the service mode (CSM= Customer
Service Mode).

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

3. Displays the option bytes.

4. Displays the type number version of the set.

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

6. Indicates the television is receiving an "IDENT" signal on
the selected source. If no "IDENT" signal is detected, the
display will read "NOT TUNED"

7. Displays the detected Colour system (e.g. PAL/NTSC).

8. Displays the detected Audio (e.g. stereo/mono).

9. Displays the picture setting information.

10. Displays the sound setting information.

How to exit

To exit CSM, use one of the following methods:

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

• Press the POWER button on the television set.

5.3 Problems and Solving Tips Related to CSM

5.3.1 Picture Problems

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

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

240105

Picture too dark or too bright

If:

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

• The picture improves when you enter the Customer
Service Mode,

EN 14 LC4.2HE AA5.

Service Modes, Error Codes, and Fault Finding

Then:

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

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

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

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

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

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

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

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

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

10. The new PERSONAL preference values are automatically
stored.

White line around picture elements and text

If:

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

Then:

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

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

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

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

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

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

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

8. The new PERSONAL preference value is automatically
stored.

Snowy picture

Check CSM line 6. If this line reads “Not Tuned”, check the
following:

• Antenna not connected. Connect the antenna.

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

• The tuner is faulty (in this case line 2, the Error Buffer line,
will contain error number 10). Check the tuner and replace/
repair the tuner if necessary.

Black and white picture

If:

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

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

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

8. The new PERSONAL preference value is automatically
stored.

Menu text not sharp enough

If:

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

Then:

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

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

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

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

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

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

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

8. The new PERSONAL preference value is automatically
stored.

5.4 ComPair

5.4.1 Introduction

Note:

For this chassis, there is no ComPair fault finding database
available. For reference purposes, however, the ComPair
software for the LC4.2E chassis can be used.

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 I2C level) and is
therefore capable of accurately indicating problem areas. You
do not have to know anything about I2C commands yourself
because ComPair takes care of this.
ComPair speeds up the repair time since it can automatically
communicate with the chassis (when the microprocessor is
working) and all repair information is directly available. When
ComPair is installed together with the SearchMan electronic
manual of the defective chassis, schematics and PWBs are
only a mouse click away.

5.4.2 Specifications

Then:

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

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

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

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

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

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
connector.

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

Service Modes, Error Codes, and Fault Finding

EN 15LC4.2HE AA 5.

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

Beside fault finding, ComPair provides some additional
features like:

• Up- or downloading of pre-sets.

• Managing of pre-set lists.

• 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 5-5 ComPair Interface 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 (excluding transformer):
4822 727 21631.

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

• Starter kit SearchMan32 software: 3122 785 60050.

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

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

• ComPair interface cable: 3122 785 90004.

• ComPair firmware upgrade IC: 3122 785 90510.

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

• Transformer UK: 4822 727 21633.

• Additional ComPair interface cable: 3139 131 0379.

I2C SERVICE
CONNECTOR

9V DC

E_06532_008.eps

180804

TO

5.4.3 How To Connect

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 mains adapter to the supply connector
(marked with 'POWER 9V DC') of the ComPair interface.

4. Switch the ComPair interface “off”.

5. Switch the television set “off” with the mains switch.

6. Connect the ComPair interface cable with the connector on
the rear side of the ComPair interface (marked with 'I2C')
and the additional ComPair interface cable. Connect the
other side of the additional ComPair interface cable with
the ComPair (or Service) connector at the rear side of the
TV.

7. Plug the mains adapter in a mains outlet, and switch the
interface “on”. 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.

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

5.5 Error Codes

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

5.5.1 How To Read The Error Buffer

You can read the error buffer in 3 ways:

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

Examples:

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

detected error

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

error code 9 is the last detected (newest) error

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

•Via ComPair.

5.5.2 How To Clear The Error Buffer

The error code buffer is cleared in the following cases:

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

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

EN 16 LC4.2HE AA5.

Service Modes, Error Codes, and Fault Finding

– Make sure the menu item CLEAR is highlighted. Use

the MENU UP/DOWN buttons, if necessary.

– Press the MENU RIGHT button to clear the error

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

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

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

5.5.3 Error Codes

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

Table 5-2 Error code overview

Error Device Error description Check item Diagram

0 Not applicable No Error
1 Not applicable - - ­2 Not applicable - - ­3 Not applicable - - ­4 GM1501 I2C error while communicating

5 Not applicable +5v protection 7930 A6
6 I2C bus General I2C error 7011, 3088,

7 Not applicable Not applicable - ­8 M24C32 I2C error while communicating

9 M24C16 I2C error while communicating

10 Tuner I2C error while communicating

11 Not applicable - - ­12 Not applicable - - ­13 Not applicable - - ­14 K4D263238M Read-write error with the

15 TDA9178T/N1 I2C error while communicating

16 Not applicable - - ­17 Not applicable - - ­18 Not applicable - - ­19 I-Board I2C error while communicating

with the Genesis Scaler
and/or Flash-ROM is faulty/
empty

with the Scaler EEPROM

with the EEPROM

with the PLL tuner

Scaler SDRAM

with Histogram

with I-Board

7401
7530

3096

7531 A11

7099 A2

1302, 3302,
3303, 3327

7501 A10

7560 A3

I-Board -

5.6 The Blinking LED Procedure

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

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

• The Led blinks with as many pulses as the error code
number, followed by a time period of 1.5 seconds, in which
the Led is off.

• Then this sequence starts is repeated.

Any RC5 command terminates this sequence.

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

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

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

A7A11

A2

A1

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

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

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

• The sequence starts again at 12 short blinks.

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 NVM Editor

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

5.7.2 Load default NVM values

In case a blank NVM is placed or when the NVM content is
corrupted, default values can be downloaded into the NVM.
After the default values are downloaded it will be possible to
start up and to start aligning the TV set. This is no longer
initiated automatically; to initiate the download the following
action has to be performed:

1. Switch off the TV set via the mains switch

2. Short circuit the SDM jumpers (keep short circuited)

3. Press P+ or Ch+ on the local keyboard (and keep it
pressed)

4. Switch on the TV set via the mains switch

5. When the set has started up the P+/Ch+ button can be
released and the short circuit of the SDM jumpers can be
removed.

6. The red LED will be on continuously to indicate that the
download is initiated (normally when SDM is activated the
red LED will start with the Blinking LED sequence).

7. Wait +/- 30 Seconds (time needed to download default
values to the NVM)

Result: The set is in SDM, the NVM is loaded with default
values and the blinking LED is not activated (The blinking LED
is not activated in this case to show that the download has been
performed), the LED will be on.

5.7.3 Tuner and IF

No Picture in RF mode

1. Check whether picture is present in AV. If not, go to Video
processing troubleshooting section.

2. If present, check that the Option settings are correct.

3. Check that all supply voltages are present.

4. Check if I2C lines are working correctly (3.3V).

5. Manually store a known channel and check if there is IF
output at Tuner pin 11.

6. Feed in 105 dBuV at Tuner pin 11 and check whether there
is RGB output from Video Processing IC. If yes, Tuner may
be defected. Change Tuner.

Sound in picture problem for L' system (rolling horizontal lines)

1. Check whether AGC L' in Sam mode is set to 0.

2. If yes, align the set to correct value.

Required system is not selected correctly

1. Check whether the Service jumper (#4022, 08 05 size) is
present. If yes, remove it.

2. Check whether SEL_IF pin is according to what is
specified.

Service Modes, Error Codes, and Fault Finding

EN 17LC4.2HE AA 5.

5.7.4 Video Processing

No power

1. Check +12 V and 3V3 at position 1910.

2. If no supply, check the connector 1910.

3. If it is correct, check the power supply board.

Power supply is correct but no green light

1. Check the two connectors 1005 and 1601, if they are
properly inserted.

2. If they are inserted correctly, check if the 3V3 is present.

No picture display

1. Check the RGB signal.

2. If it is present, check 3-IC7016 (NE555).

3. If it has output, the problem is in SCALER part.

4. Otherwise, check H-out on pin 2 of NE555. If the input
signal of pin2 is present, but no output, the IC is failed.

Note:

• If the H-out (pin 67) does not have signal or the level is low,
check the output of NE555 (pin 3) during start up.

• If the H-out (pin 67) has a signal (or has a signal for a very
short time), change IC7016 (NE555).

No TV but PC is present

1. Check if HSYNC and VSYNC are present at PIN 3 of 7071
and 7015.

2. If they are present, check RGB output.

3. If there is no RGB output, the IC TDA120xx can be failed.

Comb Filter not working

1. Check the option bit 5 in SAM.

2. Check NVM setting. Address 1229 is 0000.

5.7.5 Power Supply

5.7.6 Iboard and LCD Clock

General

Circuit diagram HC (chapter 7) shows the schematic diagram
of the Iboard together with IO for LC4.2HE. The main
microprocessor is the P89C664, a 64K flash microprocessor
from Philips. In some sets on the market, the P89C668 (96K)
microprocessor is used. There are 3 HEF switches (U2, U3,
U4) which select the different interface control protocols to
work with the external service providers. U7 is a RS232 IC.

The iTV Iboard is constantly powered by 5V, even when the TV
set is in its Standby mode or switched off by using the power
button on the local keyboard. The constant power supply
enables the Iboard to communicate constantly with the
headend server of the service provider. In this chassis, only
3V3 is available and this is upconverted to 5V.

Checking the Iboard

1. Check the voltages across C1 (= 3V3) and C4 (= 5V2). If
these are correct, the 3V3 to 5V upconverter is working
properly.

2. Check pin 2 (SCL) and pin 3 (SDA) of the Iboard
microprocessor P89C664 with an oscilloscope. If the
communication between microprocessor P89C664 and the
TV scalar board is working correctly, the iTV OSD menu
will appear when the menu button on the setup remote
control is activated.

3. Check pin 4 of microprocessor P89C664; this should be
low when the microprocessor is operating normally. Pin 4
goes to high and "hangs" the microprocessor if the supply
voltage drops below 4.5~4.75V. U6 is used to reset the
microprocessor and to monitor the supply voltage.

4. Check (using an oscilloscope) if there is a sine wave (16
MHz) on pin 14 and pin 15 of microprocessor P89C664
(internal Xtal oscillator).

Check fuses

This power supply contains three fuses. One is near the mains
inlet (marked on the board as 1102) and two other are near the
output connectors (marked 1610 and 1660).

1. Check with power supply in off state by means of ohmic
measurement.

2. Fuse 1102 may open in case of severe lightning strikes
and/or failures in the power supply. Despite the fact, that
this fuse is mounted in a fuse holder and the marking text
on the board, it is not meant to be field replaceable.

3. Fuses 1610 and 1660 may open in case a severe overload
of the 12 V outputs. Replacement of the power supply is
needed, but not before the cause of the overload
conditions is resolved.

Standby mode

1. Apply a 12 ohm load resistor of sufficient power rating to all
outputs (+3 V3, +12 VAL, +12 VL and +24 V). Connect the
STBY pin to GND.

2. Over an input voltage range of 90 V
+3 V3 output shall be up and within regulation (r5%). The

to 264 Vac only the

ac

voltage on the POWER DOWN pin shall be < 0.3 V at an
input voltage below 160 V
voltage higher than 240 V

, and 3.3 V r10% at an input

ac

.

ac

Normal mode:

1. Apply a 12 ohm load resistor of sufficient power rating to all
outputs (+3 V3, +12 VAL, +12 VL and +24 V). Connect the
STBY pin to the +3 V3 output.

2. Over an input voltage range of 90 V
shall be up and within regulation (r5%). The voltage on the

to 264 Vac all outputs

ac

POWER DOWN pin shall be 3.3 V r10% over the entire
input voltage range. Additionally, the voltage on the big
capacitor mounted flat on the PCB shall be 400 V r10%

Checking the LCD Clock:

1. If the LCD clock is not working correctly, first check the
error status of the clock module. In the ITV mode, press the
RECALL button on the ITV remote control in order to show
the status of the clock module.

2. If the LCD clock is not displaying the correct time, check if
there is a Teletext signal available (some TV programs do
not carry Teletext information).
Note:The LCD clock is connected directly to the Iboard
microprocessor P89C664. All Local Time information
downloaded via Teletext is captured by the Hercules IC on
the main board, relayed to the Iboard microprocessor
P89C664 and displayed via the LCD clock module. The
LCD clock itself does not keep track of real time.

EN 18 LC4.2HE AA5.

Personal Notes:

Service Modes, Error Codes, and Fault Finding

E_06532_012.eps

131004

Block Diagrams, Testpoint Overviews, and Waveforms

6. Block Diagrams, Testpoint Overviews, and Waveforms

Wiring Diagram

Wiring Diagram

19LC4.2HE AA 6.

Right

Speaker

INVERTER

1520

3P

1220

POWER

SUPPLY

1200

12P

8990

12P

1910

LCD-TV SCALER

A

8704

4P

1704

8704

8H20

8H21

LVDS CONNECTION

TO SCREEN

3P

4P

J10

J1

HC

J2
4P

LVDS OUTPUT

20P

1403

ITV BOARD

J3
5P

J5

10P

8H24

8H24

8H24

J6
8P

J4

24P

Left

Speaker

8H22

O

4P

1442

CLOCK
BOARD

BACK

LIGHT

CONNECTION

LCD SCREEN

8910

12P

POWER

IN

1001

1305

3P

1303

3P

SERVICE

COMPAIR

CONNECTION

1304

4P

H

5P

1002

1005

45P

8103

45P

1103 1698

23” I/O

1601

45P

45P

8690

1801

20P

20P

1690

8403

10P

1107-EU

SIDE I/O

D

+ CONTROL

24P

1001

1540

5P

8H23

5P

1540

ITV

J

IR/LED

1004

+12V

1005

1003

1002

To Smart Card

Express Box

External
Speaker

To Smart Card

Express Box

F_15140_015.eps

220205

Block Diagrams, Testpoint Overviews, and Waveforms

Block Diagram Video

VIDEO

TUNER + VIF

A1

1302
UR1316

TV

FM

4

SCL

REAR IO SCART

H1

SCART 2

1

21

SCART 1

1

21

TUNER

5

SDA

1102

1101

20

15

19

8

20

19

16

15

11

7

8

IF-TER

11

7

3311

7138

EF

SC2_CVBS_MON_OUT

STATUS_2

SC1_CVBS_IN

7119

EF

SC1_CVBS_RF_OUT

SC1_COMP_R_V_IN

SC1_COMP_G_Y_CVBS_IN

SC1_COMP_B_U_IN

ST

2321

2

F306

2

SC2_Y_IN

SC2_C_IN

SC1_FBL_IN

ATU

S_1

1328

1330

8

VIF1

7

VIF2

RF_AGC

SIF1

8

SIF2

7

1103

A2

A3

1005

16 30

14 32

22 24

15 31

32 14

41 5

42 4

35 11

30 16

34 12

29 17

A2

7011
TDA15021H

24

25

31

29

30

A2

A3

A3

HERCULES

Sound

Tra p s

AC

AGC

Detect

DC

QSS Mixer

AM Demod.

HISTOGRAM

SC2_Y_IN

SC2_C_IN

SC2_CVBS_MON_OUT

STATUS_2

A2

SC1_COMP_G_Y_CVBS_IN

STATUS_1

HERCULES

SC1_CVBS_RF_OUT

A2

SC1_CVBS_IN

SC1_CVBS_RF_OUT

(FOR ITV ONLY)

SC1_FBL_IN

SC1_COMP_R_V_IN

SC1_COMP_B_U_IN

A2

(ITV only)

H_CS_SDTV

V_SDTV

CVBS1

QSS/FM

AM

51

52

64

55

43

4360

4361

4362

SC1_COMP_G_Y_CVBS_IN_1

4363

ITV BOARD

HC

1002

J3

11

22

33

44

Video

Switch

+

Control

c

cvbs/y

SC1_FBL_IN_1

SC1_COMP_R_V_IN_1

SC1_COMP_B_U_IN_1

+8VSW_2

HSYN

Q8

VSYN

Dig. 2H/4H

Combfilter

Y Delay Adj.

Chrome

PAL/NTSC/

SECAM
Decoder &
Baseband

Delay

INSSW3

R/Pr-3

G/Y3

77 78 79 80

SCL

SDA

Q2

Q10

Q11

Q9

SAT

SCAVEM

on text

Yint

Uint

Vint

RGB/Pr Pb Insert

YUV Interface

B/Pb-3

YOU T

74 75 76 70 71 72

INTF_Y_OUT

INTF_U_OUT

7560
TDA9178T

68 9 161719

11

PIX IMPROVEMENT

14

(HISTOGRAM)

20

CVBSTERR

HSYNC

VSYNC

Skin Tone

U/V Tint

Saturation

Peaking
SCAVEM
U/V Delay

VOUT

UOUT

INTF_V_OUT

J4

13 13

88

99

RGB Matrix
Blue & Black

Strech

Gamma Corr.

YUV

YUV in/out

H/V

VIN

UIN

INTF_V_IN

INTF_U_IN

SIDE i/O

D

1001

R_OSD

G_OSD

Vertical &
East-West
Geometry

Sync Sep

H-OSC
H-Shift
H-Drive

YIN

INTF_Y_IN

1

CVBSterr

HSYN

VSYN

B_OSD

Fast Blanking

CVBS/Y

1003

RO

GO

BO

VDRA

HOUT

SANDCASTLE

13

8

To Smart Car

Express Box

9

20LC4.2HE AA 6.

HISTOGRAM

A3

7014

7019

7018

24

17

1687

1680

13
14

17

7012

10
11
14
15

18

23
24
16

2022

2020

9

3
2
1

1
2
6
7
9

EF

EF

7013

EF

7017

2

TR

Timer

OUT

7015

2

TR

Timer

OUT

7016

2

TR

Timer

OUT

HS

VS
PC_HD_DET+
BLU_PB
GRN_Y
RED_PR

RX2-IN
RX2+IN
SCL_DVI

SDA_DVI
RX1-IN
RX1+IN

+5VSWI

RX0-IN
RX0+IN
RXC+IN
RXC-IN
HOTPLUG

I341

3

I343

3

3

1698

37 9

38 8
18 28

35 11
33 13
31 15

26 20

25 21

10 36

12 34
13 33
15 31
16 30
20 26

RO

85

GO

86

BO

87

3058

VSYNC

23

HOUT

67

66

SANDCASTLE

PCHD-IO

H2

10

15

5

1

6

11

VGA

CONNECTOR

18

916

d

DVI -D

CONNECTOR

A13

F624

F625

F626

V_SDTV

H_CS_SDTV

1601

HS

VS
PC_HD_DET+
BLU_PB
GRN_Y
RED_PR

640
739

937

PCHD-MUX

R_SDTV

G_SDTV

B_SDTV

RED_PR

GRN_Y

BLU_PB

RED_PR

GRN_Y

BLU_PB

V_SDTV

A2

(ITV only)

VS

HS

H_CS_SDTV

A2

(ITV only)

RX2-IN
RX2+IN
SCL_DVI

SDA_DVI
RX1-IN
RX1+IN

RX0-IN
RX0+IN
RXC+IN
RXC-IN
HOTPLUG

7607

27

3

7

25

1

5

7606

11

15

1

1

2

12

13

7605

17

14

11

12

14

2

19

A10

R_PR-ADC

G_Y-ADC

B_PB-ADC

15

14

SDRAM

7501
K4D263238F

PC_HD_DET

7604

5

1

SDRAM

F613

F615

F617

R_PR+

G_Y+

B_PB+

8

4

V

H-CS

A7

FSDATA

FSADDR

SCALER

D2

C2

B2

L3

L4

B10
A10

N4
N3
B9
A9

B8

A8
AL
B6

AE10

7401
GM1501

ANALOG

INPUT
PORT

FRAME
STORE

CONTROL

DVI/HDMI

INPUT
PORT

GRAPHIC

ZOOM

OUT BLENDER

OSD CONTROLLER

BRIGHTNESS/CONTRAST/HUE/SAT

VIDEO
ZOOM

UART

INTERFACE

MICRO

CONTROLLER

INTERNAL

RAM

EXTERNAL

ROM

INTERFACE

DISPLAY

TIMING

GEN.

A11

OCMDATA

OCMADDR

AE16
AF11
AF16

AF12

AE15

AF15
AE12

AF13
AE14

AF14

FLASH/CONTROL

7530
MX29LV040QC

FLASH

ROM

512Kx8

PAN_VCC

TXB0­TXB3+
TXB0+
TXB3-

TXB1-

TXB1+
TXBC+

TXBC­TXB2-

TXB2+

F452

1403

1
3

6
7
8

9
10

12
13
14
15
16
17
18
19
20

F_15140_016.eps

220205

Block Diagrams, Testpoint Overviews, and Waveforms

Block Diagram Audio & Control

AUDIO

TUNER + VIF

A1

1302

REAR IO SCART

H1

SCART 1

1

21

SCART 2

1

21

PCHD-IO

H2

UR1316

TV

FM

1101

6

SC1_COMP_AV1_L_IN

2

SC1_COMP_AV1_R_IN

1102

6

2

1688

2
3
1

PC

AUDIO

IN

TUNER

4

SCL

SC2_L_IN

SC2_R_IN

PC_AUDIO_L

PC_AUDIO_R

FM-IFOUT

5

SDA

IFOUT

F306

11

10

A3

1103

37 9

39 7

1103

18 24

20 27

A13

1698

1601

442

244

IF-TER

HISTOGRAM

1005

1005

PCHD-MUX

PC_AUDIO_L

PC_AUDIO_R

2321

1330

2

7316

A12

7

8

SC1_COMP_AV1_L_IN

SC1_COMP_AV1_R_IN

SC2_L_IN

SC2_R_IN

HDMI

4836

4838

AudioIN2L

AudioIN2R

SIF1

SIF2

SSIF

HERCULES

A2

7011
TDA15021H

29

30

33

34

35

34

35

53

54

AD Conv.

Std Stereo

Decoder

AUDI O

SELECT

ADC/DAC

QSS Mixer

AM Demod.

AM

QSS/FM

I2S

Processor

AUDI O

CONTROL

Vol/Treb/

Bass

Features

DACs

21LC4.2HE AA 6.

AUDIO AMPLIFIER

A5

7709
TDA7297D

F702

F701

7

14

18

HPIC_LIN

HPIC_LIN

AMPLIFIER

IN2

IN1

7707
TDA1517ATW

AMPLIFIER

3

IN+

IN-

POWER

OUT1-

OUT1+

OUT2-

OUT2+

POWER

OUT1A

OUT1B

OUT2A

OUT2B

17

CONTROL

16

19

5

2

8

9

HP_LOUT

HP_ROUT

12

13

STANDBY

SOUND_ENABLE

Const_L_OUT

Const_R_OUT

SC2_L_MON_OUT

SC2_R_MON_OUT

SC1_L_RF_OUT

SC1_R_RF_OUT

H1

1103

1005

45 1

44 3

21 25

18 28

22 24

19 27

345

143

F708

F707

F706

F705

REAR IO SCART

HP_LOUT

HP_ROUT

CONTROL

EXT_MUTE

Const_L_OUT

Const_R_OUT

SC2_L_MON_OUT

SC2_R_MON_OUT

SC1_L_RF_OUT

SC1_R_RF_OUT

1704

1107

21

11

A2

1105

2
3
1

CONSTANT

AUDI O

OUTPUT

1102

1101

1

2

3

4

HC

3

1

3

1

ITV BOARD

J5

HP_LOUT

HP_ROUT

SCART 2

1

21

SCART 1

1

21

LEFT
SPEAKER

RIGHT
SPEAKER

1107

11

11

SIDE I/O +

D

CONTROL

J5

HP_LOUT

HP_ROUT

1105

EXTERNAL

SPEAKER

60

61

62

63

37

38

HISTOGRAM

A3

7376-A

7377-A

7376-B

7377-B

1:1

1:1

AUDOUTLSR

AUDOUTLSL

CONTROL

IR LED PANEL

J

6541

GND

7542

OUT

SIDE I/O +

D

CONTROL

RC_IR

RD_GR_LED

LED_CTRL

+5V

1309

1310
1311
1312
1313

To Smart Card

Express Box

Channel+

Channel­Volume+

Volume-

Power

+5VA

VS

6540B

7540

Green

6540A

Red

3544

7541

3540

PC-TV-LED

IR

+5VA

LED-SEL

1540

44

55

22

33

11

1540

1002

1
2
3
4
5
6

KB

LEDIN_CLK
IRIN_DATA-IN

MODE
STATUS_DATA-IN
DGND
IROUT

LEDIN_CLK
IRIN_DATA-IN

MODE
STATUS_DATA-OUT
DGND
IROUT
KB
LED_CTRL

RD_GR_LED
RC_IR

+5V

1001

17 17
20 20

21 21
22 22
23 23

ITV BOARD

HC

J4

11
22
33
44
55
66

LEDIN_CLK_TXD_SCL1
IR_IN_DATA-IN_RXD_SDA1

MODE
STATUS_DATA_OUT

GND

PC_TV_LED_OUT

+5V

LED_SEL_OUT

U5
P89C664

13

MICRO

11

CONTR.

10

1

KEYBOARD

PC_TV_LED

RC_IR

LIGHT_SENSOR

H1

1107

J5

99
33

44

88
77

REAR IO SCART

KEYBOARD
PC-TV-LED

LED-SEL

IR

LIGHT-SENSOR-SDM

A13

1698

21
36

45
14
43

1601

PCHD-MUX

LED_SEL

7640

KEYBOARD
PC_TV_LED

IR

LIGHT-SENSOR-SDM

3640

+3v3STBY

6640

+5VSWI

HERCULES

A2

7011
TDA15021H

HERCULES

120
107

97

115

114

116
119

102

SOUND-ENABLE

111
122

SEL_IF

4022

SERVICE

SMD

STATUS_1
STATUS_2

EXT_MUTE

STANDBY

A1

A3

A3

A5

A5

A5
A3

F_15140_017.eps

220205

Block Diagrams, Testpoint Overviews, and Waveforms

Block Diagram Scaler

HERCULES

A 2

A13

KEYBOARD

LIGHT-SENSOR-SDM

A13

IR

A13

A3

STAT U S_2

A3

STAT U S_1

P50_LINE_ITV_IR_SW

A3

+3V3STBY

P50

7001,7003

+3V3STBY

+5VSW

+1V8_A

+1V8_B

7070

7075

100,117,118,124

4,5,7,9,88,90,94

3,93,96

15,69,82

120

115

97

119

116

123

127

14

7011

u-Processor

HERCULES

IC

ERR

DECDIG

22LC4.2HE AA 6.

SCALER

A7

SDM PINS

4022

SEL_IF

SCL

SDA

56

7099

NVM

ERR

9

TV_IRQ

P50

A1

A5

A13

A5

A7

A7

A5

A3

A6

114

SOUND_ENABLE

111

107

PC-TV-LED

108

109

NVM_WP

104

6

102

99

7

EXT_MUTE

TV_SC_COM

98

122

STANDBY

126

POWER_DOWN

128

1001

10

11

2007

2006

A13

H_CS_SDTV

A2

V_SDTV

A2

HS

VS

A7

SD_HD_SEL

PC_HD_DET-

PC_HD_DET+

A2

R_SDTV

A2

G_SDTV

A2

B_SDTV

RED_PR

GRN_Y

BLU_PB

HD_FILTER

A7

A7

SD_HD_SEL

PC_HD_SEL

A7

PCHD-MUX

13

12

1

2

9,11

F624

F625

F626

7605

14

15

7604-5

11 10

7607

27

3

7

25

1

5

21

22

7604-6

13 12

1

5

7607 L H PIN
SD_HD_SEL SDTV HDTV 22
PC_HD_SEL ENABLE DISABLE 9

7604

6604

23 4

69 8

H_CS

PC_HD_DET

V

A7

6605

17

F613

F615

F617

R_PR+

G_Y+

B_PB+

14

11

9

SOG

R_PR-

G_Y-

B_PB-

A10

SDRAM

A11

A12

#RESET

ANALOG

INPUT

FLASH/CONTROL

+3V3STBY

7532

5
VCC

RESET

GND

2,3

PORT

4

+3V3_IO

RESET

3547-2

3547-3

3546-2

3546-3

OCMADDR1

OCMADDR2

7401

GM1501
SXGA DISPLAY
CONTROLLER

GRAPHIC

ZOOM

SCREEN SIZE

(1)

PRESENT ONLY FOR 23"

(2)

PRESENT ONLY FOR 26"

(1)

3551

(2)

3552

MSTR_SCL

MSTR_SDA

EXT.

ROM

INTER-

FACE

GPIO_G09_B4

DISPLAY

TIMING

GEN

NVM-WP

ADDRESS

PAN _ V CC

DATA

TXB0­TXB3+
TXB0+
TXB3-

TXB1­TXB1+
TXBC+

TXBC­TXB2-

TXB2+

7531

3,4,5

10,11

13,16

NVM

1403

1,2

FOR SETS

WITHOUT

PIXEL+

ADDRESS

DATA

FLASH

ROM

TO LVDS

CONNECTOR

LCD PANEL

PIXEL+
PAN E L

5

6

7

SCL_IO

SDA_IO

6
7

8
9

12
14
15

17
18
19
20

FOR SETS

WITH

PIXEL+

H2

PC-IN

15

DDC_5V

DVI-IN

PC-AUDIO-IN

FRONT

J

CONTROL

PCHD-IO

1511

1

10

3,11,19,22

14

15

16

17

18

23

6540

7543

6541

A 9

4445**

PP2

1002

20p

PP1

7102
EPCS4518

7108
OC

GENERATOR

LVDS IN

10

LVDS_SIGNAL_IN

EPLD
CONTROL

EPLD

FLASH

ROM

CLOCK

SCALER INTERFACE

SDA_IO

SCL_IO

PIXEL+_RESET

PIXEL+_SYNC

+3V3STBY

+5V+SWI

PC_HDMI-AUDIO_SEL

PANEL-PWR-CTL

** FOR 17" ONLY

* FOR 23" & 26"

3452*

7449*

7201
THC63LVDF84B

LVD S
INTERFACE
RECEIVER

1409 1001

1

3

4

5

7

9+5

UART_TX

UART_RX

SCL

SDA

TV_IRQ

SD_HD_SEL

PC_HD_SEL

HD_FILTER

LAMP_ON-OFF

BU_LIGHT_ADJ1

7501

37

HS

VS

38

PC_HD_DET+

BLU_PB

7693

RES

7694

RES

8

DVI

NVM

5

6

5

6

8

DDC

NVM

RED_PR

UART_TX

UART_RX

2

6

7

SCL_DVI

SDA_DVI

9

DDC_5V

3691

3682

6691

3710

5692

6692

+3V3STBY

+5VSWI

HOT_PLUG

RXC+IN

24

PC_AUDIO_L

PC_AUDIO_R

PC-TV-LED

LED-SEL

LIGHT-SENSOR-SDM

+3V3STBY

6

KEYBOARD

23489

GRN_Y

RX2-IN

RX2+IN

RX1-IN

RX1+IN

RX0-IN

RX0+IN

RXC-IN

3709

IR

18

19

35

33

31

22

23

6

7

26

25

9

10

29

28

20

12

13

15

16

4

2

40

41

43

42

45

11 04

1698

9

8

28

27

11

13

15

24

23

40

39

20

21

37

36

1601

17

18

26

34

33

31

30

42

44

8

5

LIGHT-SENSOR-SDM

3

4

1

A14

1301

4

3

2

1

3

6

4

2

1

3

6

4

SIDE AV

D

89

6

1302

1540

2

+12VSW

5952

LKB 5x

1309~13

PC_HD_DET+

PC_HD_DET-

BLU_PB

GRN_Y

RED_PR

UART_TX

UART_RX

+3V3STBY

+5VSWI

AudioIN2L

4836

AudioIN2R

4838

PC-TV-LED

LED-SEL

KEYBOARD

SUPPLY

7952

8

7

VCC

3951//52

2953

HS

VS

SDRAM

7606

1

2

15

14

11

12

9, 17, 19

A7

PC_HD_SEL

A 7

ERR

14

ADDRESS

DATA

FRAME
STORE

CONTROL

OSD CONTROLLER

OUT BLENDER

BRIGHTNESS/CONTRAST/HUE/SAT

A7

VIDEO
ZOOM

DVI/HDMI

INPUT

PORT

INTERFACE

MICRO-

CONTROLLER

INTERNAL

RAM

UART

GPIO_G07_B6

GPIO_G07_B2

HOT_PLUG

PC_HD_DETA13

A6

A12

A2

A2

3640

6640

+3V3STBY

+5VSWI

7640

IR

POWER_DOWN

TV_SC_COM

Y_NOTCH

+3V3_PLL

2488

2487

A2

+3V3STBY

6995

1

Q

S

2

R

OSC

6

3

4

3954

2956

F954

REF

5

2957

+1V8

7995

32

1

6951

5953

PANEL-PWR-CTL

+5VSWI

I996

2960

5996

+1V8_ADC

5997

+1V8_DVI

5998

+1V8_CORE

+3V3STBY

A7

7955

3955

7992

13

I992

2994

2

7953

5959

13

7954

2

5994

3958

1401

F960

2960

GPIO_G09_B1

OCM_INT1

GPI_G09_B3

GPIO_16

+2V5_DDR

PAN _V CC

OCM_OD0

OCM_OD1

VGA_SCL

VGA_SDA

GPIO_G09_B4

GPIO_G07_B0

GPIO_G07_B5

GPIO_G09_B0

PPWR

PWM1

PBIAS

OCM_TIMER1

3444*

EPLD I/O

PP3

7101
EP1C12F256C8

EPLD

(PIXEL+

PROC)

PP4

A13

A13

A2

A2

A2

A12

A13

A13

A14

A13

A6

A6

1

3

4

5

7

9

7403
THC63LVDM83R

LVDS
TRANS­MITTER

SDA

SCL

RESET_IN

SYNC_OUT

POWER
SUPPLY

SDA

SCL

RESET_IN

SYNC_OUT

+3V3_IN

1403

TXB3-

FOR SERVICE

3,4,5

10,11

13,16

7501

LF15ABDT

1,2

6
7

8
9

12
14
15

17
18
19
20

F521

F503

TO LCD PANEL (LVDS)

+3V3

+1V1

+5V

PAN _ V CC

TXB0­TXB3+
TXB0+

TXB1­TXB1+
TXBC+

TXBC­TXB2-

TXB2+

7504

SI2307D5

7505

1304

1

3

UART

2

A 3A 1

E_14490_102.eps

040804

Block Diagrams, Testpoint Overviews, and Waveforms

Testpoint Overview TV & Scaler Board

F001 B4
F002 C3
F003 D2
F004 C5
F005 C4
F006 B3
F007 B4
F008 B3
F009 A3
F010 B3
F011 B3
F012 A3
F013 C3
F014 C3

F018 C4
F019 B4
F020 D4
F021 B4
F022 A4
F023 B4
F024 D3
F025 D3
F026 D4
F027 A2
F028 C4
F029 C4
F030 C3
F031 C3

F032 C3
F033 D4
F034 D3
F035 D4
F036 C4
F037 A2
F038 D4
F039 A2
F040 D4
F041 D4
F042 C5
F043 C4
F044 C4
F045 D4

F046 D3
F047 D3
F048 D4
F049 D4
F050 C4
F051 D3
F052 B3
F053 D3
F055 D4
F056 B4
F057 B3
F058 D4
F059 A4
F060 B5

F061 D5
F062 D5
F063 C4
F064 A3
F067 D4
F068 C5
F069 C5
F070 B5
F071 B5
F072 D4
F073 B5
F074 B4
F075 D4
F076 B4

F090 C3
F093 C2
F094 C4
F095 D5
F096 D5
F097 C4
F099 C2
F301 D3
F302 D1
F303 D1
F305 C2
F306 C1
F307 C1
F308 D1

SERVICE TESTPOINT

3139 123 5804.2

F309 B2
F310 D3
F311 C3
F312 D2
F313 D2
F314 D2
F315 D2
F316 C2
F317 C2
F401 C6
F402 A5
F403 A5
F404 A5
F405 A8

F406 A8
F411 A8
F412 A8
F413 A8
F414 A8
F415 A8
F416 A8
F417 A8
F418 A8
F434 A6
F436 A6
F437 A6
F444 B7
F460 C6

F461 C7
F462 C6
F463 C6
F465 C5
F466 C6
F470 C5
F478 A7
F482 A6
F486 B6
F501 B8
F530 A5
F531 B6
F532 B6
F533 B6

F534 C5
F535 B6
F536 A6
F537 A6
F538 A5
F539 A5
F540 A6
F541 A6
F580 A3
F584 B4
F587 A4
F588 A4
F590 A2
F601 D7

F602 C6
F603 D6
F604 C5
F605 C5
F606 D7
F607 C5
F608 D6
F609 D7
F610 D7
F612 C6
F613 C6
F615 C5
F617 C6
F618 C6

F619 C7
F620 C6
F621 C7
F622 C7
F624 C5
F625 D5
F626 D5
F627 D7
F628 C7
F629 D7
F630 C7
F631 D7
F632 D7
F633 D7

F634 D5
F635 D5
F636 D7
F637 C5
F638 D7
F639 D7
F640 D6
F641 D6
F642 D6
F643 D5
F644 C5
F645 D5
F646 D6
F647 D6

23LC4.2HE AA 6.

F701 A2
F702 A1
F705 A2
F706 A2
F707 A2
F708 A2
F710 D4
F711 B3
F712 B4
F713 A1
F714 A2
F715 A2
F801 D8
F802 D8

F803 D8
F804 C8
F805 D8
F806 C7
F807 C7
F808 C8
F809 C8
F810 D7
F811 C7
F812 D8
F813 D8
F814 D8
F815 D8
F816 D8

F817 D8
F818 D8
F819 C8
F820 D8
F821 D8
F822 D8
F823 D8
F824 D8
F826 C7
F827 C7
F828 D7
F829 C7
F830 D7
F902 A1

F903 A2
F904 A2
F905 A2
F906 A5
F907 A4
F908 D3
F909 A5
F910 A5
F912 A3
F913 A4
F914 A1
F915 A3
F952 A6
F953 A6

F954 A6
F955 A7
F958 A5
F960 A6
F988 C6
I001 B4
I002 A3
I003 B4
I004 B4
I005 B3
I006 A3
I007 B3
I008 B4
I009 B3

I010 B3
I011 B3
I013 B4
I015 B3
I017 C3
I018 B3
I019 B3
I020 B3
I021 C3
I022 C2
I023 B4
I024 B4
I025 C3
I026 C3

I027 C3
I028 C3
I029 C3
I030 C4
I031 C4
I032 C3
I033 C3
I034 C4
I035 C4
I036 B4
I037 C4
I039 C4
I040 C4
I041 B4

I042 B3
I043 C3
I044 C2
I045 C4
I046 C4
I047 C4
I048 C4
I049 C4
I050 C4
I051 C4
I053 C4
I054 C4
I055 C4
I056 C3

I057 C4
I058 B4
I059 B4
I060 B4
I062 B3
I063 B3
I064 C3
I065 D4
I066 D3
I067 D3
I068 D3
I069 C3
I070 C4
I071 C3

I072 C3
I073 C4
I074 C4
I075 C4
I076 B4
I077 B3
I078 B2
I079 B4
I080 B4
I081 C4
I082 C5
I083 C5
I084 C5
I085 C5

I086 C4
I087 B4
I088 A3
I089 A4
I091 C4
I092 C4
I094 A4
I095 A3
I096 A4
I097 A4
I098 A4
I099 A4
I302 D1
I303 C1

I304 D1
I311 C2
I313 C2
I317 D2
I318 C3
I319 C2
I320 C1
I321 C2
I322 C2
I324 C1
I325 C2
I340 A4
I341 A4
I342 A4

I343 A4
I344 A4
I345 A5
I346 A4
I347 A4
I348 B4
I349 B4
I350 A2
I351 A2
I352 A2
I353 A3
I354 C3
I355 C3
I356 C3

E_14490_021.eps

I357 B4
I358 B4
I359 C4
I360 B4
I361 B5
I362 B5
I363 B4
I371 C3
I401 B5
I402 B6
I415 A8
I416 A7
I423 B6
I424 C6

030604

I425 B6
I426 B6
I427 C7
I428 C7
I436 B5
I437 A5
I438 B6
I439 B6
I440 B6
I441 B5
I442 C6
I443 C6
I444 C7
I445 C7
I446 C6
I502 B8
I503 B8
I585 A3
I586 A3
I601 D6
I604 C6
I605 D6
I606 D6
I607 D6
I608 D6
I609 C6
I610 C6
I611 D6
I612 D6
I614 C6
I615 D6
I616 C6
I618 C6
I619 C6
I620 C6
I621 D7
I622 D6
I623 D7
I624 D5
I625 D5
I626 D6
I627 D6
I628 D6
I629 D6
I633 D7
I634 D7
I635 D7
I636 D6
I637 D6
I638 C7
I639 C6
I640 C6
I641 C7
I642 C6
I643 D6
I644 D6
I645 D7
I646 D6
I647 C5
I648 D5
I649 D5
I650 D5
I651 D6
I701 A2
I702 A2
I703 A2
I704 A2
I705 A2
I706 A2
I707 A2
I709 A1
I710 B2
I711 A1
I712 A1
I713 A1
I714 D3
I715 D3
I716 D3
I717 A4
I718 B2
I719 B1
I720 A1
I721 A4
I723 A2
I724 A2
I725 A2
I726 D3
I727 D3

I728 A2
I729 A2
I730 B1
I731 B2
I732 A2
I737 A2
I738 A2
I739 A2
I740 A2
I741 A2
I802 D8
I803 D8
I810 D7
I811 C7
I812 D8
I813 D7
I814 C8
I815 D8
I816 C7
I817 D7
I818 C8
I819 C8
I822 D8
I829 D7
I833 D7
I834 D8
I836 D7
I838 D7
I840 D8
I841 C7
I842 C8
I844 C7
I847 D8
I848 D8
I901 A4
I902 A4
I903 A4
I904 A4
I905 A4
I906 A4
I907 A4
I908 A4
I910 A4
I951 A8
I952 A8
I953 A8
I954 A8
I955 A8
I956 A6
I958 A7
I959 A7
I961 A7
I992 A8
I995 C8
I996 C8

F302

1V / div DC

20us / div

1V / div DC

20us / div

F306

200mV / div AC

20us / div

F305 No wafeform available

F613

200mV / div DC

20us / div

F615F303

200mV / div DC

20us / div

F617

200mV / div DC

20us / div

F624 F625

500mV / div DC

20us / div

500mV / div DC

20us / div

F626 F701 F702

500mV / div DC

20us / div

20mV / div AC

1ms / div

20mV / div AC

1ms / div

F705 F706

50mV / div AC

1ms / div

50mV / div AC

1ms / div

F707 F708

50mV / div AC

1ms / div

50mV / div AC

1ms / div

I341

1V / div DC

5ms / div

I344

1V / div DC

20us / div

I904

2V / div DC

5us / div

F011 1V9
F012 1V9
F903 11V9
F905 3V3
F906 11V6
F915 5V3
F912 33V7

F913 8V
F958 11V6
F960 11V4
F954 5V4
F992 2V5
F996 1V8

Block Diagrams, Testpoint Overviews, and Waveforms

p
0

Testpoint Overview TV & Scaler Board

SERVICE TESTPOINT

24LC4.2HE AA 6.

F452

500mV / div DC

20us / div

Personal Notes:

3139 123 5804.2

E_14490_022.eps

030604

E_06532_012.e

1310