1-11-3 E3B90TR
Ye s
Ye s
Ye s
Ye s
No
No
No
No
FLOW CHART NO.14
The fluorescent display tube does not light up.
Is 5V voltage supplied to Pin(6, 24) of IC612?
Is approximately -24V to -28V voltage supplied to
Pin(15) of IC612?
Is there approximately 500kHz oscillation to
Pin(26) of IC612?
Are the filament voltage applied between Pin(1)
and Pin(24) of the fluorescent display tube?
Also negative voltage applied between these pins
and GND?
Replace the fluorescent display tube (FL601).
Check the TIMER+5V line and service it if defective.
Check the -FL line and service it if defective.
Check R621, IC612 and their periphery, and
service it if defective.
Check the power circuit, D1103, D1108, R1106,
C1110, C1143 and their periphery, and service it if
defective.
No
Is 5V voltage supplied to Pin(1) of IC1104?
FLOW CHART NO.13
P-ON+3.3V is not outputted.
Replace IC1104.
Check D1101, C1107, and their periphery, and
service it if defective.
Ye s
No
Ye s
Check D1101, C1107, and their periphery, and
service it if defective.
FLOW CHART NO.12
P-ON+2.5V is not outputted.
Is 5V voltage supplied to Pin(1) of IC1103?
Replace IC1103.
No
Check D016, D1032, D1102, C1104, C1105 and
their periphery, and service it if defective.
FLOW CHART NO.11
HDD+5V is not outputted.
Is 5V voltage supplied to the emitter of Q1102?
Is the "L" pulse outputted to the collector of Q1104?
Check Q1104, D1117 and their periphery, and
service it if defective.
Replace Q1102.
Ye s
No
Ye s
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