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9.2.2 Inverter Board
No Backlight
OK
Check ON/OFF signal
OK
OK
Check U201 Pin1 output tooth wave?
OK
Short C207,check the U201 Pin7 & Pin10 output square wave?
OK
The backlight operation and the Pin7&Pin10 output
square wave which duty more than 90%
OK
Check FB circuit (R232...&R233...)
Check CN101 =12V
NG
NG
Check U201 Pin9 =12V
NG
NG
NG
NG
Check adapter
Check Interface board
Change F101
Check U201
Check Q203,Q205,Q207&Q204,Q206,Q208
Check Q209,Q210,PT201,C213 &
Q211,Q212,PT202,C214
32
HP F1703
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