Philips LC1.15E, Service Manual

9

No sound

Defective Reset IC of IC603

1) Check volume and speaker

- Speaker

Defective MSP3400D of IC601

- Sound comes out only when being inputted into Audio 

- Earphone                      Defective B+(8V,5V) of IC604,605.               L/R

2) Check after replacing IC603
3) Replace IC601
4) Check and replace B+ of IC604,605.

10

Video color beat noise

Earphone shield case being touched

Check the mould of shield and JA401, Replace shield case

Soldering IC301 and IC507

Re-soldering

1

Soft touch doesn’t  

Defective speaker wire

1) Make some space between the speaker wire and 

function properly

and inverter wire

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.

2

Soft touch doesn’t

1) Broken components and

1) Check Soft touch with eyes

function

soldering of them

Check and repair soldering

2) P101 connector error

2) Check and repair the P101 connector

3

No screen

Input error of inverter connector

1) Bend the pin legs of P801 connector -> recheck them
2) Check and repair the IC801,802 SI4925

P502 and Pin 21 connector

1) Check and fix P502 connector

being slipped out

2) Check and fix the components at P502 LCD module 

and at main board.

3) Check Pin21. 

Cracked components and

1) Check and repair tuner board and main board

soldering at tuner board 

2) Solder Q403, Q402 and C153

4

Dark screen

1) Defective LCD lamp

1) Replace the inverter

2) Defective inverter

2) Replace the LCD lamp

3) Input error of inverter connector

2) Check the connector input.

5

Broken OSD display

Defective the font rom of IC501

Check and replace the font rom of IC501

TROUBLESHOOTING

1. General Features

2. PC Mode

No.

Symptom

Cause

Check Point

No.

Symptom

Cause

Check Point

Check Point

6

Screen noise

Clock or phase being

1) Resettig is needed according to the video card of each

not able to be adjusted

PC

2) Horizontal noise : adjust phase until no horizontal

noise occurres

3) Vertical noise : adjust clock in menu until no vertical 

noise occurres

7

Screen position error

Screen position error

1) Play the Auto Configure in Menu.

horizontally or vertically

2) Adjust horizontal and vertical position until the screen

displayes normally

8

Color beat noise

Soldering AD converter

Recheck adn repair AD9884

or making it short

3. TV and external input

No.

Symptom

Cause