1-11-2
E3B90TR
Is the "H" pulse inputted to the base of Q1100?
Is the "H" pulse inputted to the base of Q1104?
Is 3.3V voltage supplied to
Pin(16) of IC1501?
Is 5V voltage supplied to
Pin(62, 90, 99) of IC1501?
Replace Q1100.
Yes
FLOW CHART NO.10
P-ON+5V is not outputted. (P-ON+9V is outputted normally)
Is 5V voltage supplied to the collector of Q1106?
Replace Q1106.
No
No
Yes
Yes
Is the "H" pulse inputted to the base of Q1106?
Check D016, D1032, D1102, C1104, C1105, and
their periphery, and service it if defective.
Check R1140 and their periphery,
and service it if defective.
FLOW CHART NO.7
HDD+12V is not outputted.
Is 14V voltage supplied to the collector of Q1100?
No
No
FLOW CHART NO.9
P-ON+9V is not outputted. (P-ON+10.5V is outputted normally)
Replace Q1105.
Yes
Is the "H" pulse (approximately 10V) inputted to
the base of Q1105?
Check D1120, R1138, R1159, and their periphery,
and service it if defective.
No
FLOW CHART NO.8
P-ON+10.5V is not outputted. (HDD+12V is outputted normally)
Check D1135, D1136 and their periphery, and
service it if defective.
Yes
Yes
Replace IC1501.
Yes
Check AL+3.3V,
TIMER+5V line,
Q1527, Q1528,
D1533, D1565
and service it if
defective.
No
No
Check D017, D1031, D1035, C1037 and their
periphery, and service it if defective.
Is the "L" pulse (approximately 0V) inputted to
the base of Q1511?
Is the "H" pulse (approximately 5V) inputted to
the base of Q1512?
Is 5V voltage supplied to the
Pin(37,99) of IC501.
Replace Q1511.
Replace
Q1512.
Yes
FLOW CHART NO.6
AL+44V is not outputted.
Is 44V voltage supplied to the emitter of Q1511?
No
No
Yes
Yes
Replace IC501.
Yes
Check AL+5V line,
and service it if
defective.
No
No
Check D013, D1104, C013, and their periphery,
and service it if defective.
Is the "L" pulse outputted to the collector of Q1104?
Check IC1102, Q1100 and their periphery, and
service it if defective.
Yes
Is 37V voltage outputted to the collector of Q1101?
No
No
Yes
Replace Q1104.
Replace Q1101.
