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2.) W / LED , No Backlight
Check Fuse F101 =12V
Check ON/OFF signal
Check U201 pin9=12V
Check the pin1 of U201 have correct wave
Check D201(-),D202(-) have the output of square wave at short time.
Check the resonant wave of pin2 & pin5 for PT201/PT202
Check the output of PT201/PT202
Check connecter & lamp
NG
OK
NG
OK
NG
OK
NG
OK
NG
OK
NG
OK
NG
OK
To change
Check Interface board
Change Q201 or Q202
Change U201
Check Q205/Q207/Q203/D201
or
Check Q209/Q210/C213 or
Q211/Q212/C214
Change PT201or PT202
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