Acer LCD-X193HQ Service Manual page 45

Acer
4.3 DC output voltage is unstable
Output voltage unstable
Check Vbe of
Q801below 0.3V
Check
reference
voltage
Check feedback
circuit
END
Checkcircu
it if
Check Q801, Q802
Check Pin R of
IC803 voltage
about 2.5V
Check R822,
R823.R825
Check
Vpin2.4of IC801
about 1V
Check Vpin6 of
IC801have output
Change IC
50
Acer –LCD-X193HQ
Check ZD801,
D803, D805
Check R832,, IC801,
CheckR815, c814,
R816