AV-15LCG
AV-15LCH
AV-15LCS
TROUBLESHOOTING
1. General Features
No.SymptomCauseCheck Point
1Soft touch doesnOt Defective speaker wire1) Make some space between the speaker wire and
function properlyand inverter wirethe 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.
2Soft touch doesnOt1) Broken components and1) Check Soft touch with eyes
functionsoldering of themCheck and repair soldering
2) P101 connector error2) Check and repair the P101 connector
3No screenInput error of inverter connector1) Bend the pin legs of P801 connector -> recheck them
2) Check and repair the IC801,802 SI4925
P502 and Pin 21 connector1) Check and fix P502 connector
being slipped out2) Check and fix the components at P502 LCD module
and at main board.
3) Check Pin21.
Cracked components and1) Check and repair tuner board and main board
soldering at tuner board 2) Solder Q403, Q402 and C153
4Dark screen1) Defective LCD lamp1) Replace the inverter
2) Defective inverter2) Replace the LCD lamp
3) Input error of inverter connector2) Check the connector input.
5Broken OSD displayDefective the font rom of IC501Check and replace the font rom of IC501
2. PC Mode
No.SymptomCauseCheck Point
6Screen noiseClock or phase being1) Resettig is needed according to the video card of each
not able to be adjustedPC
2) Horizontal noise : adjust phase until no horizontal
noise occurres
3) Vertical noise : adjust clock in menu until no vertical
noise occurres
7Screen position errorScreen position error1) Play the Auto Configure in Menu.
horizontally or vertically2) Adjust horizontal and vertical position until the screen
displayes normally
8Color beat noiseSoldering AD converterRecheck adn repair AD9884
or making it short
3. TV and external input
No.SymptomCauseCheck Point
9No soundDefective Reset IC of IC6031) Check volume and speaker
- SpeakerDefective 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 touchedCheck the mould of shield and JA401, Replace shield case
Soldering IC301 and IC507Re-soldering
24No.51932 |
ACEC
