Emerson LC320EM2F - Frequently Asked Questions (FAQ); Troubleshooting Common Issues

8-3 FL11.4ATR
See FLOW CHART No.5 <P-ON+24V is not output.>
AL+5V is not output.
FLOW CHART NO.9
Is approximately +24V voltage supplied to the
collector of Q636?
Is approximately +5.6V voltage supplied to the
base of Q636?
No
Ye s
Ye s
Check D656 and their periphery circuit, and service
it if defective.
No
Replace Q636.
P-ON+3.3V is not output.
FLOW CHART NO.10
Is approximately
+8.5V voltage supplied to Pin(1) of
IC202?
Is approximately +7.5V voltage supp
lied to Pin(2) of
IC202?
No
Ye s
Ye s
Check C639, D643 and their periphery circuit, and
service it if defective.
Check Q207, Q208 P-ON-H2 line an
d their periphery
circuit, and service it if defective.
No
Replace IC202.
Check C638, D642 and their periphery
circuit, and service it if defective.
Check Q210, Q211, D208, P-ON-H1
line and their
periphery circuit, and ser
vice it if defective.
Replace Q213.
Is approximately -9V voltage supplied to the base of
Q213?
Ye s
No
No
LCD-6V is not output.
FLOW CHART NO.11
Is approximately -9.5V voltage supplied to the anode
of D642?
Ye s