Table of Contents
Advertisement
1. General Features
No.
Symptom
1
Soft touch doesn't
function properly
2
Soft touch doesn't
function
3
No screen
4
Dark screen
2. PC Mode
No.
Symptom
5
Screen noise
6
Screen position error
7
Color beat noise
3. TV and external input
No.
Symptom
8
No sound
- Speaker
- Earphone
9
Video color beat noise
All manuals and user guides at all-guides.com
TROUBLESHOOTING
Cause
Defective speaker wire
and inverter wire
1) Broken components and
soldering of them
2) P2 connector error
Input error of inverter connector
P502 and Pin 21 connector
being slipped out
Cracked components and
soldering at tuner board
1) Defective LCD lamp
2) Defective inverter
3) Input error of inverter connector
Cause
Clock or phase being
not able to be adjusted
Screen position error
horizontally or vertically
Soldering D-SUB Jack of JA202
and IC202.
Cause
Defective Reset IC of IC603
Defective MSP340D of IC601
Defective B+(8V,5V) of IC604,605.
Earphone shield case being touched
Soldering IC301 and IC912
- 15 -
Check Point
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. correct working state of
the Shield case.
1) Check Soft touch with eyes
Check and repair soldering
2) Check and repair the P2 connector
1) Bend the pin legs of P1 connector -> recheck them
2) Check and repair the IC804,805 SI4925
1) Check and fix P902 connector
2) Check and fix the components at P902 LCD module
and at main board.
3) Check Pin21.
1) Check and repair tuner board and main board
2) Solder Q101,102.
1) Replace the inverter
2) Replace the LCD lamp
2) Check the connector input.
Check Point
1) Resettig is needed according to the video card of each
PC
2) Horizontal noise : adjust phase until no horizontal
noise occurres
3) Vertical noise : adjust clock in menu until no vertical
noise occurres
1) Play the Auto Configure in Menu.
2) Adjust horizontal and vertical position until the screen
displayes normally
Recheck adn repair JA202,IC202
Check Point
1) Check volume and speaker
- Sound comes out only when being inputted into Audio
L/R
2) Check after replacing IC603
3) Replace IC601
4) Check and replace B+ of IC604,605.
Check the mould of shield and JA203, Replace shield case
Re-soldering
Advertisement
Table of Contents
