BenQ G2010WP - Page 37

37
Power trouble shooting_2
DC output voltage is unstable
Check R810, R811
Check feedback
circuit
Check Vpin3-4 of
IC801 about 6V
Check Vpin1-2
of IC801
a
bout
Check C815,
D806
,
R812
Check R809,
R814
END
Output Voltage Unstable
Check Vbe of
Q801 below
Check circuit if
short
Check ZD801,
ZD802
,
ZD803
,
Check Q801, Q802
Check reference
voltage
Check Pin R of
IC803 voltage
Check R809, R814,
IC801, R818