Philips LC4.1U AA Service Manual

Colour Television Chassis

LC4.1U

AA

E_14520_000.eps

170904

Contents Page Contents Page

1. Technical Specifications, Connections,
and Chassis Overview 2

2. Safety Instructions, Warnings, and Notes 4

3. Directions for Use 6

4. Mechanical Instructions 7

5. Service Modes, Error Codes, and Faultfinding 9

6. Block Diagrams, Testpoint Overviews,

and Waveforms

Wiring Diagram 15
Block Diagram Audio & Video 16
Block Diagram Scaler & Supply 17
Testpoint Overview TV & Scaler Board 18-19
Testpoint Overview Front IR / LED Panel 20
I2C Overview 21
Supply Voltage Overview 22

7. Circuit Diagrams and PWB Layouts Diagram PWB
Tuner & VIF (Diagram A1) 23 32-33
Hercules (Diagram A2) 24 32-33
Hercules Supply (Diagram A3) 25 32-33
Audio Amplifier (2x2W) (Diagram A4) 26 32-33
TV-Supply (Diagram A5) 27 32-33
Scaler (Diagram A6) 28 32-33
Scaler LVDS (Diagram A7) 29 32-33
Scaler IO (Diagram A8) 30 32-33
Supply (Diagram A9) 31 32-33
Rear IO Cinch (Diagram A10) 31 32-33
Side AV Panel (Diagram D) 34 35
Top Control Panel (Diagram E) 36 36
Audio Amplifier (2x5W) (20 & 23”)(Diagram I) 37 38
Front IR / LED Panel (Diagram J) 39 39

8. Alignments 41

9. Circuit Descriptions 45
Abbreviation List 49
IC Data Sheets 51

10 Spare Parts List 54
11 Revision List 57

©

Copyright 2004 Philips Consumer Electronics B.V. Eindhoven, The Netherlands.
All rights reserved. No part of this publication may be reproduced, stored in a
retrieval system or transmitted, in any form or by any means, electronic,
mechanical, photocopying, or otherwise without the prior permission of Philips.

Published by BB 0469 Service PaCE Printed in the Netherlands Subject to modification EN 3122 785 14530

EN 2 LC4.1U AA1.

Technical Specifications, Connections and Chassis Overview

1. Technical Specifications, Connections and Chassis Overview

1.1 Technical Specifications

1.1.1 Vision

Display type : 14 inch: LCD-VA

: 15 inch: DV-LCD-IPS
: 17-23 inch:

DV-LCD-IPS

Screen size: : 14 inch (37 cm)

: 15 inch (38 cm)
: 17 inch (45 cm)
: 20 inch (51 cm)
: 23 inch (59 cm)

Resolution (HxV) : 14 inch: 640x480

(VGA)

: 15 inch: 1024x768

(XGA)

: 17 inch: 1280x768

(WXGA)

: 20 inch: 640x480

(VGA)

: 23 inch: 1280x768

(WXGA)

Viewing angle : 14 inch: 170x170 deg.

: 15 inch: 130x100 deg.
: 17-23 inch:

176x176 deg.
Light output : 450 cd/m
Tuning system : PLL
Colour systems : NTSC
Video playback : NTSC
Channel selections : 100 channels

: PLL

Aerial input : 75 ohm

: Coax

1.1.2 Sound

Sound systems : AV stereo

: BTSC

Maximum power : 14-17 inch: 2x2 W

: 20-23 inch: 2x5 W

1.2 Connections

1.2.1 Rear Connections

AERIAL

IN

FM

IN

Pr

Pb Y

RL

AUDIOINVIDEO

IN

Figure 1-1 Rear connections

Aerial - In

- IEC-type Coax, 75 ohm D

FM Ant

- IEC-type Coax, 75 ohm D

AV1 Cinch: Video CVBS/YPbPr/RGB - In, Audio - In

Wh - Audio L 0.5 V
Rd - Audio R 0.5 V
Bu - Video Pb/B 0.7 V

2

Rd - Video Pr/R 0.7 V
Ye -Video CVBS 1 V
Ge - Video Y/G 0.7 V

/ 10 kohm jq

RMS

/ 10 kohm jq

RMS

/ 75 ohm jq

PP

/ 75 ohm jq

PP

/ 75 ohm jq

PP

/ 75 ohm jq

PP

Bk - Sync H 0 - 5 V jq
Bk - Sync V 0 - 5 V jq

VGA: RGB - In

1

6

11

5

10

15

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Figure 1-2 VGA Connector

VGA

1

5

10

6

15

11

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1.1.3 Miscellaneous

Power supply:

- Mains voltage : 90-240 V ac

- Mains frequency : 50 / 60 Hz

Ambient conditions:

- Temperature range : +5 to +40 °C

- Maximum humidity : 90 % R.H.

Power consumption

- Normal operation : from 32 W

- Standby : < 2 W

: to 110 W

1 - Red 0.7 V_pp / 75 ohm j
2 - Green 0.7 V_pp / 75 ohm j
3 - Blue 0.7 V_pp / 75 ohm j
4 - Ground H
5 - Ground H
6 - Red - gnd Ground H
7 - Green - gnd Ground H
8 - Blue - gnd Ground H
9 - 5V_DC +5 V_dc j
10 - Ground H
11 - Ground 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

Technical Specifications, Connections and Chassis Overview

1.2.2 Side Connections

HEADPHONE

AUDIO R IN

AUDIO L IN

VIDEO IN

S-VIDEO

AUDIO IN (PC/HD)
DATA

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EN 3LC4.1U AA 1.

S-VHS - In Hosiden

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

Video - In (Cinch)

1 - CVBS 1 Vpp/75 ohm jq

Audio - In (Cinch)

1 - Audio - R 0.5 Vrms/10 k ohm jq
2 - Audio - L 0.5 Vrms/10 k ohm jq

Figure 1-3 Side connections

Mini Jack: Audio - in

4 - Audio - L 0.5 Vrms / 10 kohm jq
3 - Audio - R 0.5 Vrms / 10 kohm jq

1.3 Chassis Overview

FRONT IR / LED

J

PANEL

Jack: Headphone- Out

Bk - Headphone 32 - 600 ohm / 10 mW rt

TOP CONTROL PANEL

LCD PANEL

TV & SCALER

BOARD

AMPLIFIER

PA NE L

SIDE IO PANEL

E

A

I

D

POWER SUPPLY
UNIT

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Figure 1-4 Chassis Overview

EN 4 LC4.1U AA2.

Safety Instructions, Warnings, and Notes

2. Safety Instructions, Warnings, and 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

• 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 standby (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.

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

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Figure 2-1 Dolby PL Symbol

2.3.2 Schematic Notes

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

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

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

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

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

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

-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
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).

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.

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.

Safety Instructions, Warnings, and Notes

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

More Information

For more information on how to handle BGA devices, visit this
URL: www.atyourservice.ce.philips.com
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

Some PWBs in this chassis are “lead-free prepared”. This is
indicated on the PWB by the PHILIPS lead-free logo (either by
a service-printing or by a sticker). It does not mean that lead­free solder is actually used!

(needs subscription,

EN 5LC4.1U AA 2.

P

b

Figure 2-2 Lead-free logo

Due to this fact, 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.

• Use only adequate solder tools applicable for lead-free
soldering tin.

• Adjust your solder tool so that a temperature around 217 ­220 deg. C is reached at the solder joint.

• Do not mix lead-free soldering tin with leaded soldering tin;
this will lead to unreliable solder joints!

• Use only original spare parts listed in this manual. These
are lead-free parts!

• On the website www.atyourservice.ce.philips.com
subscription, not available for all regions) you can find
more information on:

– Aspects of lead-free technology.
– BGA (de-)soldering, heating-profiles of BGAs used in

Philips sets, and others.

2.3.5 Practical Service Precautions

(needs

• 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 - 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.

EN 6 LC4.1U AA3.

3. Directions for Use

You can download this information from the following website:

http://www.philips.com/support

Directions for Use

4. Mechanical Instructions

Mechanical Instructions

EN 7LC4.1U AA 4.

Index of this chapter:

1. Service Position

2. Rear Cover Removal

3. Power Supply Unit Removal

4. TV & Scaler Board Removal

5. Side I/O Panel Removal

6. Top Control Panel Removal

7. Audio Amplifier Panel Removal

8. Exchanging the LCD Panel

9. 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.
To access the ComPair connector, proceed with the following:

1. Manually unlock and remove the cover cap.

2. Remove the tape shielding that covers the ComPair

connector (1).

Note: Make sure that both the ComPair connector and the
UART connector are shielded off with a piece of insulating tape
after repair for ESD reasons. Place this tape over the holes in
the rear cover of the set.

4.2 Rear Cover Removal

1

Figure 4-3 Rear cover removal

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

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

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

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Figure 4-1 ComPair connector

4.1 Service Position

4.1.1 Foam Bars

Figure 4-2 Foam bars

1

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4.3 Power Supply Unit Removal

1

Figure 4-4 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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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
created to perform measurements and alignments. By placing
a mirror under the TV, you can easily monitor the screen.

EN 8 LC4.1U AA4.

Mechanical Instructions

4.4 TV & Scaler Board Removal

1

2

Figure 4-5 TV & Scaler board removal

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

2. Remove the screw from the grounding cable (1).

3. Remove the mounting screw (2) and remove the board.

4.5 Side I/O Panel Removal

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4.7 Audio Amplifier Panel Removal

1

2

Figure 4-7 Audio amplifier panel removal

1. Disconnect all cables from the audio amplifier panel.

2. Remove all mounting screws from the audio amplifier panel

(1).

3. Unlock the panel by twisting back the clamp at the bottom
(2).

4. Take out the audio amplifier panel.

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1

2

Figure 4-6 Side I/O panel removal

1. Disconnect all cables from the Side I/O panel.

2. Remove the mounting screw (1).

3. Unlock the panel by twisting back the clamp at the bottom

(2).

4. Take out the Side I/O panel from the bracket.

4.6 Top Control Panel Removal

1. Disconnect the cable from the top control panel.

2. Remove the two mounting screws from the top control

panel.

3. Take out the top control panel.

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4.8 Exchanging the LCD Panel

1

Figure 4-8 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.

4.9 Re-Assembly

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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”.

Service Modes, Error Codes, and Fault Finding

5. Service Modes, Error Codes, and Fault Finding

EN 9LC4.1U AA 5.

Index of this chapter:

1. Test Points

2. Service Modes

3. Problems and Solving Tips (related to CSM)

4. ComPair

5. Error Codes

6. The Blinking LED Procedure

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.

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.

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 +5V-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

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Figure 5-1 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.

00022 LC41US1 1.00/S41EV1 1.01 SDM
ERR 0 0 0 0 0
OP 000 057 140 032 120 128 000

Specifications

• Tuning frequency: 61.25 MHz.

• Colour system: NTSC.

• 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.
– Auto Volume Levelling (AVL).

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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.

EN 10 LC4.1U AA5.

s
4

Service Modes, Error Codes, and Fault Finding

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.

00022 LC41US1 1.00/S41EV1 1.01 SAM
ERR 0 0 0 0 0

• 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.

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.

OP 000 057 140 032 120 128 000

. Clear Clear ?
. Options
. Tuner
. White Tone
. Audio
. NVM Editor
. SC NVM Editor
. ComPair Mode On

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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. AAABCD-X.Y. This is the software identification of the
main microprocessor:

– A= the project name (LC41).
– B= the region: E= Europe, A= Asia Pacific, U= NAFTA,

L= LATAM.

– C= the software diversity:

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.

Service Modes, Error Codes, and Fault Finding

EN 11LC4.1U AA 5.

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:

1 00022 LC41US1 1.00/S41EV1 1.01 CSM
2 CODES 0 0 0 0 0

3 OP 000 057 140 032 120 128 000
4 20PF8846/12
5
6 NOT TUNED
7 PAL
8 STEREO
9 CO 50 CL 50 BR 50
0 AVL Off

5.3 Problems and Solving Tips Related to CSM

5.3.1 Picture Problems

Note: The problems described below are all related to the TV
settings. The procedures used to change the value (or status)
of the different settings are described.

Picture too dark or too bright

If:

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

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

Then:

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

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

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

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.

E_14520_062.eps

230904

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.

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.

EN 12 LC4.1U AA5.

Service Modes, Error Codes, and Fault Finding

Black and white picture

If:

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

Then:

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

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

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

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

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

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

5.4.2 Specifications

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.
For 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:

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

2

the I

C bus of the television. ComPair can send and

receive I

2

C commands to the micro controller of the

2

C level. ComPair can access

television. In this way, it is possible for ComPair to
communicate (read and write) to devices on the I
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 extends.
When this is not the case, ComPair will guide you through
the faultfinding tree by asking you questions (e.g. Does the

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

text or a waveform picture) that will bring you to the next
step in the faultfinding process.

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

Beside fault finding, ComPair provides some additional
features like:

• Up- or downloading of pre-sets.

• Managing of pre-set lists.

• Emulation of the Dealer Service Tool (DST).

• If both ComPair and SearchMan (Electronic Service

Manual) are installed, all the schematics and the PWBs of
the set are available by clicking on the appropriate
hyperlink.

Example: Measure the DC-voltage on capacitor C2568
(Schematic/Panel) at the Mono-carrier.

– Click on the “Panel” hyperlink to automatically show

the PWB with a highlighted capacitor C2568.

– Click on the “Schematic” hyperlink to automatically

show the position of the highlighted capacitor.

2

C busses

5.4.1 Introduction

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

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

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

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

2

C level) and

2

C commands

Service Modes, Error Codes, and Fault Finding

E
R

EN 13LC4.1U AA 5.

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 between the

connector on the rear side of the ComPair interface
(marked with “I

2

C”) and the ComPair 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.

TO
I2C SERVIC
CONNECTO

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).

– 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).

PC VCR I2CPower

Figure 5-5 ComPair Interface connection

5.4.4 How To Order

ComPair order codes:

• ComPair Software: ST4191.

• ComPair Interface Box: 4822 727 21631.

• AC Adapter: T405-ND.

• ComPair Quick Start Guide: ST4190.

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.

9V DC

E_06532_008.eps

180804

Table 5-1 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 GM5221 I2C error while communicating

5 Not applicable +5v protection 7930 A6

6 I2C bus General I2C error 7011, 3083,

7 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 - - -

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

with the Scaler EEPROM

with the EEPROM

with the PLL tuner

7401
7403

3084

7402 A7

7099 A2

1302, 3302,
3303, 3327

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,

A6

A2

A1

EN 14 LC4.1U AA5.

Service Modes, Error Codes, and Fault Finding

• 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 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 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.

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.

5.7.4 Power Supply

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_ac to 264 V_ac only
the +3 V3 output shall be up and within regulation (±5%).
The voltage on the POWER DOWN pin shall be < 0.3 V at
an input voltage below 160 V_ac, and 3.3 V ±10% at an
input voltage higher than 240 V_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 _ac to 264 V_ac all
outputs shall be up and within regulation (±5%). The
voltage on the POWER DOWN pin shall be 3.3 V ±10%
over the entire input voltage range. Additionally, the
voltage on the big capacitor mounted flat on the PCB shall
be 400 V ±10%

5.7.3 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 1007 and 1008, 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 pin 3 of IC7006 (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) doesn’t 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 IC7006 (NE555).

No TV but PC is present

1. Check if HSYNC and VSYNC are present at PIN 3 of 7007
and 7005.

Block Diagrams, Testpoint Overviews, and Waveforms

6. Block Diagrams, Testpoint Overviews, and Waveforms

Wiring Diagram

TOP CONTROL

E

EN 15LC4.1U AA 6.

1308

2P

LCD SCREEN
(LVDS) CONNECTION

TTL

Rigth

Speaker

BACK

LIGHT

CONNECTION

LCD SCREEN

INVERTER

1200

12P

SCALER

A

TUNER

1910 1206

12P

1007

1701

3P

7011 7401

5P

2P6P

1008

1402

1401

4P

1951

Left

Speaker

AUDIO AMPLIFIER

I

(5W)

5P

40P

1010

10P

1704

5P

1706

5P

1703

2P

FOR 2x5W

6P

1870

J

FRONT
IR/LED

BACK

LIGHT

CONNECTION

LCD SCREEN

POWER

IN

1001

FOR 2x2W

D

1110

SIDE I/O

1105

4P

1107

5P

3P

1108

10P

1111

4P

E_14520_001.eps

170904

Block Diagrams, Testpoint Overviews, and Waveforms

Block Diagram Audio & Video

EN 16LC4.1U AA 6.

TUNER + VIF

A 3

A1

1302

TV

FM

SCL

A1

SDA

COMPAIR

1331

SSIF

A2

SEL_IF

A2

REAR IO CINCH

A 3

A10

Y

Pb

Pr

CVBS

L

R

SIDE I/O (AV Part)

D

34

SVHS

1

2

7101

5

CVBS

L

R

SVHS
AUDIO IN

HERCULES (AUDIO)

A2

L/R_SC1_AV1_IN

AV3_LR_IN

PC_AUDIO_LR

SC1_LR_RF_OUT

+5VSW

6,7

2
1
3

Y/CVBS

A1

+VTUN

4

51

7316

C

L

R

SSIF(Tuner FM)

9

11

10

1108 1010

4

2

6

7

9

10

F306

34,35

49,50

56,57

53,54

2321

F305

3311

6323

4

2

6

7

9

10

7011 - SOUND

QSS/FM

33

3323

7320

Audio Select

4327

4331

RF_AGC

4333

4334

+5VSW

AD Conv

Std Stereo

Decoder

ADC/DAC

1328

2

3

F312

7

8

F313

1330

2

3

F314

SIF2

7

SIF1

8

F315

CVBS_SC1_AV1_IN

SC1_R_V_IN

SC1_G_Y_ IN

SC1_B_U_IN

L_SC1_AV1_IN

R_SC1_AV1_IN

AV3_C_IN

AV3_CVBS_Y_IN

I2S Proc

36,37

VIF2

VIF1

73

Audio

Control

Vo l/T reb /

Bass

Features

DACs

70

HERCULES (IF+VIDEO)

A2

7011 - IF

25

24

31

30

29

CVBS_SC1_AV1_IN

AV3_CVBS_Y_IN

AV3_C_IN

SC1_R_V_IN

SC1_G_Y_ IN

SC1_B_U_IN

L_SC1_AV1_IN

R_SC1_AV1_IN

AV3 _LR _IN

PC_AUDIO_LR

61

60

62,63

OUT_MUTE

AGC

Detect

AUDO UTLS R

AUDO UTLS L

Sound

Tr a p s

HERCULES 7011

TDA15001H
TDA15011H
TDA15021H

QSS Mixer/
AM Demod.

NAFTA

AP-NTSC / LATAM

EU / AP-PAL

A4

SOUND_ENABLE

POWER_DOWN

A2

EXT_MUTE

FROM 1,2-1200

INVERTER PANEL

CVBS1

CVBS/Y-X

QSS/FM

AM

C-X

55

58

51

59

52

43

64

AUDIO AMPLIFIER (2X2W)
(14, 15, and 17’’)

AUDOUT SL

AUDOUT SR

A2

AUDOUT SL

AUDOUT SR

12

13

I

1

2

3

4

5

STANDBY

MUTE

7706
74LVCO8AD

1

&

2

&

AUDIO AMPLIFIER (2x5W) 20 & 23’’

1706

1703

2718

2712

7702
7703

MUTE

MUTE

3

11

STANDBY

AUDOUT SL

AUDOUT SR

7703-1

MUTE

AUD_SUP

7710

Input

sw.

CS1A..D

Output

sw.

TDA1517ATW

I706

I707

7703-2

cvbs/y

INA..D

c

+

cvbs

A6

AUD_SUP

7712

3

18

17

MODE

OUT_MUTE

7709
TDA7297D

14

7

12

13

Dig. 2H/4H

Combfilter

Y Delay Adj.

Y_NOTCH

15,16

8,9

12,13

19 L+

16

2

5

H/V

I710

I711

A2

AUDOUT SL

AUDOUT SR

Y

int

Chroma

PA L / N T S C/

SECAM
Decoder &
Baseband

Delay

R/Pr-3

INSSW3

78

79 8077 74 75 76

5013

SECAM

only

2736

2737

STANDBY

MUTE

L-

R+

R-

U

int

V

int

RGB/YPRPB Insert

YUV Interface

G/Y3

B/Pb-3

1701

1

2

3

1706

1

2

3

4

5

1704

1

2

3

4

5

7014

EF

7012

2014

7005#

3005

6

THR

7

DISC

2015

RGB Matrix

Blue & Black

Stretch

Gamma Corr.

Skin Tone

U/V Tint

Saturation

YUV

Pea king

SCAVEM

U/V Delay

YUV IN/OUT

H/V

CON BRI

RGB Matrix

Blue & Black

Gamma Corr.

R_OSD

SAT

SCAVEM

on Text

Stretch

G_OSD

cvbs/y

Sync Sep

H-OSC
H-Shift
H-Drive

85

RO

GO

86

87

BO

B_OSD

Fast Blanking

F007

67

HOUT

FB/SC

66

7013

A3

SANDCASTLE

HISTOGRAM

7015

F006

7016

VSYNC

3031

1105

VDRA

23

VDRB

22

3010

4

3

2

1

R

4Ω/2W

OR

8Ω/5V

L

C-X

CVBS/Y-X

Vertical & East­West Geom etr y

UIN

VIN

UOUT

YOU T

VOUT

2056

2027

YIN

70

71 72

2057

SIDE AV

D

(LS CONN. PART)

1110

1

2

3

1106

HEADPHONE

1107

1

2

3

4

5

OR

OR

VCC

CTRL

8

5

EF

EF

TR

RES

OUT

2028

2040

3036

2042

I044

I041

I039

2

4

3

7007#

6

7

R_SDTV

G_SDTV

B_SDTV

+5VSW

7006#

3025

6

THR

7

DISC

2029

# = NE555 TIMER

8

VCC

THR

TR

RES

DISC

OUT

CTRL

5

2045

VCC

CTRL

2

4

3

8

TR

RES

OUT

5

2034

+5VSW

TO

A8

SEE

BLOCKDIAGRAM

SCALER

2

4

H_CS_SDTV

3

A8

V_SDTV

A8

E_14520_058.eps

270904

Block Diagrams, Testpoint Overviews, and Waveforms

Block Diagram Scaler & Supply

EN 17LC4.1U AA 6.

A8

1

2

15

3

1511

9

12

13

14

15

TOP CONTROL

E

5x

CHANNEL +
CHANNEL­VOLUME+
VOLUME­POWER

FRONT IR/LED

J

+3V3STBY

HERCULES (CONTROL)

A2

KEYBOARD

STATU S_1

A8

P50_LINE_ITV_IR_SW

A3

+1V8_A

+1V8_B

HERC_RESET

DECDIG

+3V3STBY

+5VSW

HERCULES (SUPPLY)

A3

7001,7003

+3V3STBY

DECDIG

HERC_RESET

PCHD-IO

RED_PR

GREEN_Y

BLUE_PB

VGA_5V

SDA

HS

VS

SCL

KEYBOARD

7802

RECEIVER

3802

6801

IR

7070

RC

7801

100,117,118,124

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

1308

1

REDGREEN

7804

15,69,82

F014

F015

2

7803

3,93,96

120
115

97

119

116

123

127

14

+1V8_A

+1V8_B

DCC_VGA_5V

LED_SEL

+3V3STBY

PC_TV_LED

7011

u-Processor

HERCULES

IC

P1.4

DECDIG

N.C.

IR

114

111

107

108

109

104

102

99

98

122

126

128

10

11

+5VSW

6460

7462

1870

1

2

3

4

5

6

SOUND_ENABLE

NVM_WP

6073

6076

1001

VGA_5V

6

8

DDC
NVM

A3

1008

1007

SDM PINS

4015

SEL_IF

PC-TV-LED

SCL

SDA

56
7099

7

NV
2k x 8

EXT_MUTE

TV_SC_COM

TV_IRQ

STANDBY

POWER_DOWN

2007

2006

PC_DET

3470

5

HERCULES

(FRONT CONTROL LOOP THROUGH)

2

KEYBOARD

1

2

3

4

5

6

M

A7

KEYBOARD

IR

LED_SEL

+3V3STBY

PC_TV_LED

A1

A3

A1

A7

A5

A3

A5

FROM

SUPPLY

PAN E L

1910

1

2

3

4

5

6

7

8

9

10

11

12

A5

A3 A4

A4 A5

+5VSW+3V3STBY

60603062

7060

A2

UART

CONN.

FOR

SERVICE

TV-SUPPLY

F903

F905

F906

F907

POWER_DOWN

BACK_LIGHT_ADJ1

LAMP_ON_OFF

D

1112

1

2

3

AUD_SUP

+3V3STBY

+3V3STBY

+12VSW

STANDBY

FROM

A2

see

blockdiagram

VIDEO

A7

A3

A7

A3

A7

A2

SIDE AV
(UART PART)

3123

3124

3931

5930

A2 A3 A4

A2

A7

A7

R_SDTV

G_SDTV

B_SDTV

RED_PR

GREEN_Y

BLU_PB

HD_FILTER

SD_PCHD_SEL

PC_HD_SEL

H_CS_SDTV
V_SDTV

HS
VS

SD_PCHD_SEL

H_CS_SDTV

PLL_SEL

Y_NOTCH

+3V3STBY

7930

8

7

OSC

VCC

6

5920

13

13

1

12

2

7920

7463

10,11

SCALER (ANA IN)

A6

7401
GM5221

7461

27

3

17

7

25

1

5

21

22

R_PR+

14

G_Y+

11

B_PB+

23

3497

3499

3479

2466

2468

2470

SOG

R_PR-

G_Y-

B_PB-

ANALOG

INPUT
PORT

+

TRIPLE

ADC

&

PLL

7510

23 4

14

1

15

69 8

5

1111

1

2

3

4

3937

1

Q

S
R

5

2

3

4

REF

2

2931

3910

7910

2921

7520
MK1575-01

RECOVERY

1401

1

2

3

4

3936

5931

5910

CLOCK

PLL

5932

CS_HSYNC

VSYNC

30

69

F913

F911

6910

F912

12

2

+3V3STBY

7936

6911

F499

F503

PLL_SEL

+5

VSW

+VTUN

+8VSW_TV

A7

A9

Y_NOTCH

7403
M29W040B-55k1

FLASH

ROM

512kx8

7402
M24C32

EEPROM

(NVM)

4kx8

SDA

A2

JTAG_SDL_UART_TX

JTAG_SCL_UART_RX

SCL

SUPPLY

+3V3STBY

32

FBINFBIN

7955

N.C.

DATA

ADDRESS

1403
14M31818

SDA_IO

SCL_IO

3430

3431

3442

3441

1

169

170

WC

F954

2997

DVI

INPUT

VIDEO

ROM

INTERFACE

CLK_SYN

SYSTEM

+1V8

SCALER (LVDS, TTL OUT)

A7

LV DS

Tx

22

21

20

19

18

17

14

13

16

15

38

37

36

35

34

33

32

31

30

29

43

44

45

46

47

48

49

55

67

68

81

82

83

85

88

90

98

100

101

LV_E0_TX0-

LV_E1_TX0+

LV_E2_TX1-

LV_E3_TX1+

LV_E4_TX2-

LV_E5_TX2+

LV_E8_TX3-

LV_E9_TX3+

LV_E6_TXC-

LV_E7_TXC+

LV_ O 0

LV_ O 1

LV_ O 2

LV_ O 3

LV_ O 4

LV_ O 5

LV_ O 6

LV_ O 7

LV_ O 8

LV_ O 9

PD20

PD21

PD22

PD23

FED

FHSYNC

FVSYNC

FSHCLK

PANEL_PWR_CTL

LAMP_ON_OFF

TV_SC_COM

TV_IRQ

FBIN

PC_DET

SD_PCHD_SEL

POWER_DOWN

7437

BACK_LIGHT_ADJ1

PLL_SEL

BACK_LIGHT_ADJ2

PAN_VCC

EG1

EG0

ER7

ER6

ER5

ER4

ER1

ER0

ER3

ER2

EB3

EB2

EB1

EB0

EG7

EG6

EG5

EG4

EG3

EG2

EB4

EB5

EB6

EB7

A9

A5

A2

A2

A6

A8

A8

A2

A8

F534

LV_E0_TX0-

LV_E1_TX0+

LV_E2_TX1-

LV_E3_TX1+

LV_E4_TX2-

LV_E5_TX2+

LV_E6_TX3-

LV_E7_TX3+

LV_E8_TXC-

LV_E9_TXC+

FED

FHSYNC

FVSYNC

FSSYNC

PAN_VCC

A8

A3 A5

1404

1

2

3

4

6

8

10

12

18

20

14

16

1402

1

17

19

21

23

24x

25

27

29

31

33

35

37

39

42

38,36

A5

A5

E_14520_033.eps

230904

To LCD MONITOR (LVDS)

(MAINLY FOR 20”)

To LCD MONITOR (TTL)

Block Diagrams, Testpoint Overviews, and Waveforms

Testpoint Overview TV & Scaler Board (Top Side)

EN 18LC4.1U AA 6.

413 A4

X1

SERVICE TESTPOINT

I414 B4
I415 A4
I416 B4
I417 A4
I418 B4
I419 A5
I420 B4
I421 A5
I422 B4
I424 B4
I425 A5
I426 B5
I427 A5
I428 B5
I429 A4
I430 B5
I431 A4
I432 B5
I434 B5
I436 B5
I437 A5
I438 B5
I439 A5
I440 B5
I441 A5
I442 B5
I443 A5
I444 B5
I445 A5
I446 B5
I447 A5
I448 B5
I449 A5
I450 B5
I451 A5
I452 B5

X1

X1

500mV / div DC

5ms / div

3139 123 5819.3

E_14520_055.eps

230904