BenQ G700 Service Manual page 35

BenQ G700
Power trouble shooting_2
Output voltage unstable
Check Vbe of
Q801 below
0 3V
Check reference
voltage
Check feedback
circuit
END
Check circuit if
short
Check Q801, Q802
Check Pin R of
IC803 voltage
about 2 5V
Check R810, R811
Check Vpin3-4 of
IC801 about 6V
Check Vpin1-2 of
IC801 about 1V
Check R809,
R814
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Service Manual
Check ZD801, ZD802,
ZD803, D803, D805
Check R809, R814,
IC801, R818
Check C815, D806,
R812