PHILIPS LCD1.15E Service Manual

Colour Television
LCD1.15E
Contents Page
1 Technical Specifications, Connections,
and Chassis Overview 2 2 Safety Instructions, Warnings, and Notes 3 3 Directions for Use 6 4 Mechanical Instructions 8 5 Service Modes, Error messages,
and Repair Tips 9 6 Block Diagrams
Wiring Diagram 11
Block Diagram 11 7 Electrical Diagrams and PWB lay-outs Diagram PWB
Main Board For LC151X01-A3 LCD Panel 12-16 17-18
Main Board For LC151X01-C3P1 LCD Panel 20-24 25-26
Control and Tuner Panel 19+27 8 Electrical Alignments 29 9 Circuit Descriptions 31
Abbreviation List (N.A.)
IC Data Sheets (N.A) 10 Spare Parts List 32 11 Revision List 34
©
Copyright 2003 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 LM 0369 Service PaCE Printed in the Netherlands Subject to modification EN 3122 785 12511
EN 2 LCD1.15E1.
Technical Specifications, Connections and Chassis Overview

1. Technical Specifications, Connections and Chassis Overview

1.1 Technical Specifications

1.1.1 Reception

Tuning system : PLL Colour systems : PAL B/G,
: PAL D/K, : PAL I : SECAM B/G, : SECAM D/K, : SECAM L, : SECAM L1, : NTSC Play Back
Sound systems : 2CS B/G,
Frequency bands : VHF,
Channel selections : 100 channels Aerial input : 75 ohm
:
: 2CS D/K, : AV Stereo, : NICAM B/G : (5.5-5.85), : NICAM D/K
: UHF, : S-Channel, : Hyperband

1.1.2 LCD Characteristics

Type : LCD XGA TFT Size : 15 inch (38 cm) Pixel format : 1024x768 pixels

1.1.3 Optical Characteristics

Contrast ratio : 300:1 (typ.) Brightness : 400 cd/m2 typ. Viewing Angle : 140x120 deg. (HxV)

1.1.4 Audio

Speakers : Full range

1.1.5 Miscellaneous

Power consumption
Normal operation : 50 W Standby : 3 W
Power Supply
Power Adaptor
Input : AC 95 to 264 V,
Output : DC 12 V, 3 A
(XGA)
: 2 x 1 W_rms
50/60 Hz
Environment
Ambient temperature : +5 to +40 deg. C Relative humidity : 10% to 80% R.H.
Weight : 5 kg Dimension (WxHxD) : 315x44x51 m
Safety Instructions, Warnings, and Notes

2. Safety Instructions, Warnings, and Notes

EN 3LCD1.15E 2.

2.1 Safety Instructions

Always connect the TV set via an Insulation transformer. Use a transformer of adequate power to protect the technician from injury by electrical shocks. It will also protect the TV set and it's components from being damaged by accidental shorts of the circuitry, which may be occurred during the service operation.
Replace safety components, indicated by the symbol i in the Schematic diagram and Replacement parts list, only by the identical components to the original ones. Any other component substitution (other than original type) may increase risk of fire or electrical shock hazard.
If any fuse (or Fusible resistor) in this TV set is blown, replace it as specified.
While replacing a high wattage resistor (Oxide Metal Film Resistor, over 1 W), keep the resistor 10 mm away from PCB.
Keep wires away from high voltage or high temperature parts.

2.1.1 AC Leakage Current Check

Before returning the TV set to the customer, always perform an AC leakage current check on the exposed metallic parts of the cabinet, such as antennas, terminals, etc., to be sure the set is safe to operate without damage by electrical shock.
Leakage Current Cold Check (Antenna Cold Check)
1. Unplug the AC cord, and connect an electrical jumper between the two plug prongs of the AC cord.
2. Turn “on” the AC power switch (keep the AC cord unplugged!).
3. Measure the resistance value between the plug prongs of the AC cord and the metal shielding of the tuner or the aerial connection of the TV set. The measured resistance should be between 1 Mohm and 5.2 Mohm. When the metal shielding has no return path to the chassis, the measured resistance must be infinite.
4. Switch the TV set “off’” and remove the electrical jumper between the two plug prongs of the AC cord.
5. Check the cabinet for defects, to prevent the possibility of the customer touching any internal parts.
Leakage Current Hot Check
1. Plug the AC cord directly into the AC outlet.
2. Connect 1.5 kohm/10 W resistor in parallel with a 0.15 uF
capacitor between a good known earth ground (Water Pipe, Conduit, etc.) and the exposed metallic parts.
3. Measure the AC voltage across the resistor, using the AC voltmeter with 1000 ohm/V or higher sensitivity.
4. Plug again the AC cord into the AC outlet and repeat AC voltage measurements for each exposed metallic part. Any voltage measured must not exceed 0.75 V_rms, which corresponds to 0.5 mA.
5. If any measurement is out of the specified limits, there is a possibility of a shock hazard, and the set must be checked and repaired before returning to the customer.

2.2 Warnings:

Before servicing TV sets, covered by this service manual and its supplements and addenda, read and follow the Safety Instructions of this manual.
Note: If unforeseen circumstances create conflict between the following Servicing Precautions and any of the Safety Instructions of this manual, always follow the Safety Instructions. Remember: Safety First.

2.2.1 General Servicing Precautions

1. Always unplug the TV set AC power cord from the AC power source before:
1. Removing or reinstalling any component, circuit board
module, or any other receiver assembly;
2. Disconnecting or reconnecting any TV set electrical
plug or other electrical connection;
3. Connecting a test substitute in parallel with an
electrolytic capacitor in the receiver. Caution: A wrong part substitution or incorrect polarity installation of electrolytic capacitors may result to an explosion hazard.
2. Test high voltage only by measuring it with an appropriate high voltage meter or other voltage measuring device (DVM, FETVOM, etc), equipped with a suitable high voltage probe. Do not test high voltage by "drawing an arc".
3. Do not spray chemicals on or near this TV set or any of its assemblies.
4. Unless specified otherwise in this service manual, clean electrical contacts only by applying the following mixture to the contacts with a pipe cleaner, cotton-tipped stick or comparable nonabrasive applicator; 10% (by volume) Acetone and 90% (by volume) Isopropyl alcohol (90%-99% strength). Caution: This is a flammable mixture.
5. Unless specified otherwise in this service manual, lubrication of contacts in not required.
6. Do not defeat any plug/socket B+ voltage interlocks, with which the TV sets might be equipped.
7. Do not apply AC power to this TV set and/or any of its electrical assemblies, unless all solid-state device heat sinks are correctly installed.
8. Always connect the test TV set ground lead to the TV set chassis ground before connecting the test TV set positive lead.
9. Always remove the test TV set ground lead last.
10. Use with this TV set only the test fixtures, specified in this
service manual.
Figure 2-1 Leakage current hot check circuit
Note: Do not use a line Insulation transformer during this
check.
Caution: Do not connect the test fixture ground strap to any heat sink in this TV set.
EN 4 LCD1.15E2.
Safety Instructions, Warnings, and Notes

2.2.2 Electrostatically Sensitive (ES) Devices

Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and semiconductor "chip" components. The following techniques should be used to help to reduce the incidence of component damage, caused by static electricity.
1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging wrist strap device, which should be removed to prevent potential shock reasons prior to applying power to the unit under test.
2. After removing an electrical assembly, equipped with ES devices, place the assembly on a conductive surface, such as aluminium foil, to prevent electrostatic charge build-up or exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.
4. Use only an anti-static type solder removal device. Some solder removal devices, not classified as "anti-static", can generate electrical charges, sufficient to damage ES devices.
5. Do not use freon-propelled chemicals. These can generate electrical charges, sufficient to damage ES devices.
6. Do not remove a replacement ES device from its protective package, until immediately before you are ready to install it. (Most replacement ES devices are packed r with leads electrically shorted together by conductive foam, aluminium foil or comparable conductive material).
7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material to the chassis or circuit assembly, into which the device will be installed. Caution: Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.
8. Minimize bodily motions, when handling unpackaged replacement ES devices. (Otherwise harmless motion, such as the brunching together of your clothes fabric or the lifting of your foot from a carpeted floor, can generate static electricity, sufficient to damage an ES device).

2.2.3 General Soldering Guidelines

1. Use a grounded-tip, low-wattage soldering iron and appropriate tip size and shape, that will maintain tip temperature within the range of 500 deg. F to 600 deg. F.
2. Use an appropriate gauge of RMA resin-core solder composed of 60 parts tin/40 parts lead.
3. Keep the soldering iron tip clean and well tinned.
4. Thoroughly clean the surfaces to be soldered. Use a small
wire-bristle brush (0.5 inch or 1.25cm) with a metal handle. Do not use freon-propelled spray-on cleaners.
5. Use the following unsoldering technique:
1. Allow the soldering iron tip to reach normal
temperature (500 deg. F to 600 deg. F).
2. Heat the component lead until the solder melts.
3. Quickly draw the melted solder with an anti-static,
suction-type solder removal device or with solder braid. Caution: Work quickly to avoid overheating the circuit board printed foil.
6. Use the following soldering technique:
1. Allow the soldering iron tip to reach the normal
temperature (500 deg. F to 600 deg. F).
2. First, hold the soldering iron tip and solder the strand
against the component lead until the solder melts.
3. Quickly move the soldering iron tip to the junction of the
component lead and the printed circuit foil, and hold there only until the solder flows onto and around of the both of the component lead and the printed circuit foil.
Caution: Work quickly to avoid overheating the circuit board printed foil.
4. Closely inspect the solder area and remove any excess or splashed solder with a small wire-bristle brush.

2.3 Maintenance Instructions

2.3.1 IC Remove/Replacement

Some chassis circuit boards have slotted holes (oblong), through which the IC leads are inserted and then bent flat against the circuit foil. When holes are the slotted type, the following technique should be used to remove and replace the IC.
Removal
1. Desolder and straighten each IC lead in one operation, by gently prying up the lead with the soldering iron tip, as the solder melts.
2. Draw away the melted solder with an anti-static suction type solder removal device (or with solder braid) before removing the IC.
Replacement
1. Carefully insert the replacement IC in the circuit board.
2. Carefully bend each IC lead against the circuit foil pad and
solder it.
3. Clean the soldered areas with a small wire-bristle brush. It is not necessary to reapply acrylic coating to the areas.

2.3.2 "Small-Signal" Discrete Transistor Removal/ Replacement

1. Remove the defective transistor by clipping its leads as close as possible to the component body.
2. Bend into a "U" shape the end of each of three leads, remaining on the circuit board.
3. Bend into a "U" shape the replacement transistor leads.
4. Connect the replacement transistor leads to the
corresponding leads, extending from the circuit board, and crimp the "U" with long nose pliers to insure metal to metal contact. Then solder each connection.

2.3.3 Power Output, Transistor Device Removal/ Replacement

1. Heat and remove all solder all around from the transistor leads.
2. Remove the heat sink mounting screw (if so equipped).
3. Carefully remove the transistor from the heat sink of the
circuit board.
4. Insert a new transistor in the circuit board.
5. Solder each transistor lead, and clip off excess lead.
6. Replace the heat sink.

2.3.4 Diode Removal/ Replacement

1. Remove defective diode by clipping its leads as close as possible to diode body.
2. Bend the two remaining leads perpendicular to the circuit board.
3. Observing diode polarity, wrap each lead of the new diode around the corresponding lead on the circuit board.
4. Securely crimp each connection and solder it.
5. Inspect (on the circuit board copper side) the solder joints
of the two "original" leads. If they are not shiny, reheat them and, if necessary, apply additional solder.

2.3.5 Fuse and Conventional Resistor Removal/ Replacement

1. Clip each fuse or resistor lead at the top of the circuit board hollow stake.
Safety Instructions, Warnings, and Notes
EN 5LCD1.15E 2.
2. Securely crimp the leads of replacement component around notch at stake top.
3. Solder the connections.
Caution: Maintain original spacing between the replaced component and adjacent components and the circuit board to prevent excessive component temperatures.

2.3.6 Circuit Board Foil Repair

Excessive heat applied to the copper foil of any printed circuit board will weaken the adhesive that bonds the foil to the circuit board, causing the foil to separate from or "lift-off" the board. The following guidelines and procedures should be followed whenever this condition is encountered.
At IC Connections
To repair a defective copper pattern at IC connections, use the following procedure to install a jumper wire on the copper pattern side of the circuit board. (Use this technique only on IC connections).
1. Carefully remove the damaged copper pattern with a sharp knife. (Remove only as much copper as absolutely necessary).
2. Carefully scratch away the solder resist and acrylic coating (if used) from the end of the remaining copper pattern.
3. Bend a small "U" in one end of a small gauge jumper wire and carefully crimp it around the IC pin. Solder the IC connection.
4. Route the jumper wire along the path of the out-away copper pattern and let it overlap the previously scraped end of the good copper pattern. Solder the overlapped area and clip off any excess jumper wire.

2.4 Notes

2.4.1 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 expressed in micro-farads (µ= x 10^-6), nano-farads (n= x 10^-9), or pico-farads (p= x 10^-
12).
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.
At Other Connections
Use the following technique to repair the defective copper pattern at connections, other than IC Pins. This technique involves the installation of a jumper wire on the component side of the circuit board.
1. Remove the defective copper pattern with a sharp knife. Remove at least 1/4 inch of copper, to ensure that a hazardous condition will not exist if the jumper wire opens.
2. Trace along the copper pattern from both sides of the pattern break and locate the nearest component that is directly connected to the affected copper pattern.
3. Connect insulated 20-gauge jumper wire from the lead of the nearest component on one side of the pattern break to the lead of the nearest component on the other side.
4. Carefully crimp and solder the connections.
Caution: Be sure the insulated jumper wire is dressed so it does not touch components or sharp edges.
EN 6 LCD1.15E3.
B
M
a
AUTO
AUTO
w
Y-Z
C
h
fg
c
b
e
k
Ò
π
®
U
D
1
2
9
3
6
5
7
4
8
0
0
LIST
MENU
OK
P
¬
V
V Volum e
Press + or - to adjust the
vo lum e.
¬ Mute
Tem porarily interrupt the
sound or restore it.
P Programme selection
•to brow se through the TV
channels which are no t
skipped
•to sw itch the TV on fro m
standb y.
®Ò‡π† Video
reco rd er keys
U Time disp lay
The time,downloaded fro m the
TV channel (with teletext
broadcast) stored on
programme num ber 1 or the
low est not sk ipped programme
num ber,is displayed on the
screen.
0/9Digit keys
To select a TV channel.
0 Previous programme
To disp lay the previously
selectedTV channel.
LIST
Programme list
To disp lay the programme list.
b Teletext on/off
Teletext functions
hUfgcek
D
Sleep timer
With this key you can set a
time period after which the
TV sho uld sw itch itself to
standb y.
Press the key rep e atedly to
select the num ber of minutes.
The counter runs fro m B 0,
10,20,30...to 240 minutes.
The timer begins to count
dow n fro m the num ber of
minutes selected.
Note:To view the rem aining time,
pre ss the
D
key once.To can cel
the sleep time,repeatedly press
the
D
key until B 0 appears.
MENU
Press rep e a tedly to
display each menu.
O K Press this key to activate
yo ur cho ice,w hen in the menus.

3. Directions for Use

Directions for Use
picture
keys
AUTO
a
and sound se ttings.
To select predefined picture
AUTO
standb y or off to standb y.
Sw itche s the TV on fro m
B Standby
D
B
M
AUTO
a
AUTO
w
Y-Z
selected,corresponding with
different picture se tting is
Each time it is pre ssed,a
9
3
6
LIST
2
8
5
0
0
7
4
1
sound
AUTO
Contrast,Brigh tne ss,C o lour
and Sharpness.
M
spe c ific factory settings of
OK
MENU
different sound se tting is
Each time it is pre ssed,a
P
¬
V
refers to the personal
in the picture and sound menu.
and sound se lected an d stored
preference se ttings of picture
treb le an d bass.
selected,corresponding with
spe c ific factory settings of
Perso nal
π
k
b
e
fg
C
h
Ò
c
U
®
DESCRIPTION OF CONTROLS
AV1,AV2,S-VIDEO
,
TV
Source
peripherals:p re ss rep e atedly to
select
Select you r com puter or other
w
monitor mode.
PC
or
X Bilingual cho ice an d
to
Nicam
Stereo
to
sound in case of
Mono
Nicam Stereo
stereo tran sm ission,or fro m
• to sw itch fro m
Press this key
sound mode selection
,in case of digital
Mono
tran sm ission
lY,
Dua
Z or
Nicam Dual
• to sw itch fro m
X in case
X in case of
Dual
Z or
Nicam Dual
Y to
Nicam Dual
Y se nd s the primary
of bilingual tran sm ission:
Dual
Dual
Nicam Dual tran sm ission
broadcast language to the
• to choose betw een
Z se nd s the seco n d ar y
loudspeakers;
Dual
loudspeakers;
broadcast language to the
X se nd s a se p ara te
Dual
lan guage to each loudspeaker.
Nica m stereo transm ission,select
sound sign als,w ith stereo or
Note:in case of weak stereo
fro m the aud io R input to the righ t loudspeaker
•R+R:the audio sign al fro m the au d io R input is se nt to the left and right loudspeakers.
•L+L:the audio sign al fro m the au d io L input is sent to the left an d righ t loudspeakers
•L+R:the audio signal fro m the au d io L input is sent to the left loudspeaker,the au dio signal
Press the X ke y rep e atedly to select:
Sound output se lection in AV mode
mono reception.
In AV mode,you can select the output sound for the left and right loudspeakers.
Directions for Use
EN 7LCD1.15E 3.
Personal Notes:
ON/OFF
B
+
CH/PR
_
+
VOL
_
OK
TV/VIDEO MENU
monitor mode
PC
or
AV
,
TV
key to sw itch the TV on or off
ON/OFF
:P ress the power
in fro nt of the TV.
Sho uld your rem o te co n trol be lost or bro ken yo u can still operate yourTV with the keys
ON/OFF
:Keep the OK key p re ssed for abo u t 10 sec o n d s.
:P ress rep e atedly to select
Auto dem onstration
All the menus are being disp layed autom atically one after the other.
To stop Auto dem o nstratio n ,p re ss any key on the fro n t panel.
-
:P ress rep e atedly to display each menu
TV/VIDEO
MENU
OK: - P re ss this key to activate yo u r choice when in the menu
:- P ress - or + to brow se through the TV channels which are not sk ipped;
- Pre ss - or + to adjust the menu settings.
- Pre ss - or + to adjust the vo lum e;
:- P ress - or + to select a menu item ;
-V O L +
- CH /PR +
sw itch ed on.
-To sw itch the TV on fro m standb y.
- Pre ss - or + to select a menu item ;
TheB indicator ligh ts up brigh tly when the TV is in standby,dims when the TV is
B:Switches the TV on fro m stan db y or off to standb y.
EN 8 LCD1.15E4.
Mechanical Instructions

4. Mechanical Instructions

Notes:
To gain access to the boards of the TV set, after removing the cover cup, unstick carefully supportive stickers.
Place the stickers aside, adhesive side upwards.
When you re-assemble the TV set, don’t forget to put the
stickers back.
If the stickers are not adhesive anymore, you can order them by ordering number 3104 301 24501
Service Modes, Error Codes, and Fault Finding

5. Service Modes, Error Codes, and Fault Finding

5.1 General Features

Table 5-1 General Features

No. Symptom Cause Check Point
1 Soft touch doesn't
function properly
2 Soft touch doesn't
function
3 No screen Input error of inverter connector 1) Bend the pin legs of P801 connector -> recheck them
4 Dark screen 1) Defective LCD lamp
5 Defective OSD display Defective the IC508 Check and replace the IC508
Defective speaker wire and in­verter wire
1) Broken components and sol­dering of them
2) P101 connector error
P502 and Pin 21 connector being slipped out
Cracked components and solder­ing at tuner board
2) Defective inverter
3) Input error of inverter connec­tor
1) Make some space between the speaker wire and the Soft touch Board by sticking the speaker wire to the guide hole of the cabinet.
2) Arrange working state of A1. Tape in the inverter wire and correct work­ing state of the Shield case.
1) Check Soft touch with eyes Check and repair soldering
2) Check and repair the P101 connector
2) Check and repair the IC801, 802 SI4925
1) Check and fix P502 connector
2) Check and fix the components at P502 LCD module and at main board
3) Check Pin21
1) Check and repair tuner board and main board
2) Solder Q403, Q402 and C153
1) Replace the LCD lamp2) Replace the inverter
2) Check the connector input
EN 9LCD1.15E 5.

5.2 PC Mode

Table 5-2 PC Mode

No. Symptom Cause Check Point
6 Screen noise Clock or phase being not able to
7 Screen position error Screen position error horizontally
8 Colour beat noise Soldering AD converter or mak-

5.3 TV and External Input

Table 5-3 TV and External Input

No. Symptom Cause Check Point
9 No sound
- Speaker
- Earphone
10 Video colour beat
noise
1) Resetting is needed according to the video card of each PC
be adjusted
or vertically
ing it short
Defective Reset IC of IC603 Defective MSP3400D of IC601 Defective B+ (8 V, 5 V) of ICC604, 605.
Earphone shield case being touched
Soldering IC301 and IC507 Check and re-solder
2) Horizontal noise: adjust phase until no horizontal noise occurs3) Verti­cal noise: adjust clock in menu until no vertical noise occurs
1) Play the Auto Configure in Menu
2) Adjust horizontal and vertical position until the screen displays normally Recheck and repair AD9884
1) Check volume and speaker- Sound comes out only when being inputted into Audio L/R
2) Check after replacing IC6033) Replace IC6014) Check and replace B+ of IC604, 605
Check the mould of the shield and JA401. Replace the shield case
EN 10 LCD1.15E5.
Personal Notes:
Service Modes, Error Codes, and Fault Finding
Block Diagrams, Testpoint Overview, and Waveforms
11LCD1.15E 6.

6. Block Diagrams, Testpoint Overview, and Waveforms

Wiring Diagram

To Lamp
To Panel
To Speaker
P801
To Lamp
9965 000 20401 (A3 Panel) 9965 000 20402 (C3 Panel)
Tuner
To Control PWB
P401
P502
P601 P602
9965 000 20403 (A3 Panel) 9965 000 20404 (C3 Panel)
6631V25016G (3P) 6631V25016P (4P)
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Block Diagram System

< LCD TV System Block Diagram >
CVBS OUT
CVBS
Tuner & IF
Ext- L
Ext- R
SIF
AM
Audio
Processor
- MSP3410D
L
R
- TAUC-S120D
- TAFC-M130D
- TAFC-Z140D
Audio-Amp
LA4282
Ext_Video
For TV . Contrast . Brightness . Color . Tint
Ext_Y/C
Y / Cb / Cr
Video
Decorder
- VPC3230D
RGB in
RGB Switching
TDA8601
OSD B/R/G/B
A to D Converter
- AD9884
Scart RGB
OSD -IC
MC141585
1H/1V
Video Scaler
- MX88L284
Back Light Inverter Assy
LM151X3 - 8-bits
D-R/G/B, H / V -Sync, Den, Clock
Interface
- TMDS (8bits)21 pin
From Computer
Computer
Signal
- D-Sub
For MNT Application
R/G/B
H/V
For PC Input
- Contrast
- Brightness
- Color
CVBS For TXT
Micro-Controller
- INFINEON ( SDA55XX )
LCD
CL 36532066_013.eps
170903
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