LG L1718S-BN - - 17" LCD Monitor

17
3. DC output voltage is unstable
Check R810, R811
Check feedbac
k
circuit
Check Vpin3-4 of
IC801 about 6V
Check Vpin1-2 o
f
IC801 about 1V
Check C815,
D806, R812
Check R809,
R814
END
Output Voltage Unstable
Check Vbe o
f
Q801 below 0.3V
Check circuit if
short
Check ZD801,
ZD802, ZD803,
D803, D805
Check Q801, Q802
Check reference
voltage
Check Pin R o
f
IC803 voltage
about 2.5V
Check R809,
R814, IC801,
R818