8-2
A0C76TR
P-ON+5V is not output.
FLOW CHART NO.9
Yes
Yes
No
Is approximately 3.3V voltage supplied to Pin(1) of
IC501?
AL+3.3V is not output.
FLOW CHART NO.7
Yes
No
Is approximately 5V voltage supplied to Pin(2) of
IC504?
Check D503, D517, D518, D519, D555, C556, C570
and their periphery circuit, and service it if defective.
See FLOW CHART NO.6 <P-ON+6.4V is not output.>
See FLOW CHART NO.8 <P-ON+3.3V is not output.>
Replace IC504.
Is approximately 6V voltage supplied to Pin(2) of
IC501?
Replace IC501.
No
AMP+24V is not outputted.
FLOW CHART NO.5
Yes
No
Check for short-circuiting or leak on the load circuit,
and service it if defective.
Check D531, D548, C511, C512 and their periphery
circuit, and service it if defective.
Is approximately 24V voltage supplied to the cathode
of D531(D548)?
P-ON+6.4V is not outputted.
FLOW CHART NO.6
Yes
No
Check for short-circuiting or leak on the load circuit,
and service it if defective.
Check D503, D555, C556, C570 and their periphery
circuit, and service it if defective.
Is approximately 6.4V voltage supplied to the cathode
of D503(D555)?
Replace IC503.
P-ON+3.3V is not output.
FLOW CHART NO.8
Is approximately 24V voltage supplied to Pin(2) of
IC503?
Yes
See FLOW CHART NO.5 <AMP+24V is not output.>
No
Is approximately 5V voltage supplied to Pin(7) of
IC503?
Yes
Check Q509, Q510, P-ON-H1 line and their periphery
circuit, and service it if defective.
No
