Sanyo CE42LM4R-E, Service Manual

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N4JJ
TROUBLE SHOOTING
Item
Condition Check point
1
2
3
4
5
6
7
8
9
No power
No power
No power
No backlight
Faulty picture
Faulty picture
No RC
No key SW
Fan faulty
** HINT**
In most cases the problem is caused by the SUB POWER board or COMP
board.
Try replacing them first, then check the LCD panel.
NO LED
NO LED
LED brighter
After power on, once panel lights
then keep black out
No colour, poor picture
Darker / brighter picture etc.
Visible line on the picture
Part of the display is poor
No working of RC handset
No working or the front key Switch
After indication of the display,
then 30 seconds later, come into
standby
Change the FAN
Change the FRONT board
Change the RC or FRONT board
Change the panel
Change the COMP board
>>If not, change the panel.
Change the LCD panel
Check to voltage of KR-3 --- 5V
>>Change the power board
Check the fuse on the FILTER board
Check the connection of the AC cord.
(AC plug and junction part)
Check the voltage of
Housing KQ-2 ----13V
IC6602 ---- 9V
IC6603 ---- 12V
IC6604 ---- 6V
Housing KR-1 ---- 24V
>>Change the COMP or SUB POWER board
** Refer to the power diagram