TROUBLESHOOTING GUIDE
(LCD SECTION)
POWER DOES NOT TURN ON
Is F3801 broken ?
Is there voltage C3814
100 - 300 V ?
Is R3825 broken ?
Change F3801.
Check D3811,D3814,D3815.
Yes
No
Change R3825.
No
Yes
Yes
Yes
Is there voltage 16 V at pin
4 of IC3801 ?
Check IC3801 and peripheral
circuit.
No
No
Yes
Is there voltage 6 V at
D3820 ?
Change IC3801.
No
Yes
Is there voltage 400 V at
C3846 ?
Check D3827,Q3816 and
peripheral circuit.
.
No
Yes
Is F3803 broken ?
Change F3803.
No
Yes
Is there voltage 3.5 V
at pin 4 of IC3804 ?
Check IC3804 and peripheral
circuit.
No
Yes
Is there voltage 230 V
Q3817 ?
Check Q3817 and Q3818
and peripheral circuit.
No
Yes
Is there voltage 110 V at
C7007 ?
Check D7001, Q7001,Q7009
and peripheral circuit.
No
Change POWER PCB.
E-1
