9
No sound
Defective Reset IC of IC603
1) Check volume and speaker
- Speaker
Defective MSP3440 of IC601
- Sound comes out only when being inputted into Audio
- Earphone L/R
2) Check after replacing IC603
3) Replace IC601
10
Video color beat noise Earphone shield case being touched
Check the mould of shield and J403, Replace shield case
Soldering IC301 and IC501
Re-soldering
1
Soft touch doesnÕt
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 doesnÕt
1) Broken components and
1) Check Soft touch with eyes
function
soldering of them
Check and repair soldering
2) P401 connector error
2) Check and repair the P401 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, IC802 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.
Cracked components and
1) Check and repair tuner board and main board
soldering at tuner board
2) Solder Q301, Q302, Q402, Q403, Q801 and R802.
4
Dark screen
1) Defective LCD lamp
1) Replace the inverter
2) Defective inverter
2) Replace the LCD lamp
5
Broken OSD display
Defective the font rom of IC505
Replace the font rom of IC505
- 15 -
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) Adjust auto configure operation.
7
Screen position error
Screen position error
Adjust horizontal and vertical position until the screen
horizontally or vertically
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
