Philips 150S7 Service Manual page 43

15" LCD Color Monitor
Inverter Board
No power
Check C811 (+) =12V
Check ON/OFF signal
Check IC801 pin 2=12V?
Check IC801 Pin1/pin15 have the output of sawtooth wave at short time
Check Q805 pin5/pin8 is 12V?
Check PT801 pin7/pin8= 650V?
Replace backlight
NG
OK
NG
OK
NG
OK
NG
Check IC801 pin 5/pin6
OK
NG
OK
NG
OK
Check adapter board
Check Interface board or main board
Check Q801 or Q802
NG
OK
Cut all the pin connector of Q805, check C811 (+)= 12V?
NG
OK
Replace Q805
Unplug backlight connector wire,
check pin7/pin8= 650V?
OK
NG
Replace PT801
43
Replace IC801
Check Q801 or Q802
150S7