Toshiba e-STUDIO 4500c, Руководство по обслуживанию

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April, 2007 SERVICE CALL CONDITIONS
4-33
FGATE error 1: Feedback remains HIGH for K write SC230 D
After the start of timing to create
the black image, the PFGATE
register of the GAVD (ASIC)
does not assert, even after 5
sec. when:
•
Images are created on the
drum.
•
MUSIC patterns are created
on the transfer belt.
The BICU received no feedback
(LOW signal) from the LD unit to
indicate that the lasers started
firing at the prescribed time to
create the patterns.
•
GAVD (ASIC) on the BICU defective
•
PCI I/F on the IPU defective
•
ASIC on the IOB defective
•
Controller board disconnected, defective
•
Harness between the BICU and LDB unit
disconnected, loose, or defective.
•
Check board connections, replace
FGATE error 1: Feedback remains LOW for K write SC231 D
After the start of timing to create
the black image, the PFGATE
register of the GAVD (ASIC)
does not assert, even after 5
sec. when:
•
Images are created on the
drum.
•
MUSIC patterns are created
on the transfer belt.
The BICU received a LOW
feedback signal, but the signal
remained LOW (indicating the
lasers were still operating), even
after creation of the next image
should have started.
•
GAVD (ASIC) on the BICU defective
•
PCI I/F on the IPU defective
•
ASIC on the IOB defective
•
Check board connections, replace
FGATE error 1: Feedback remains HIGH for Y write SC232 D
After the start of timing to create
the yellow image, the PFGATE
register of the GAVD (ASIC)
does not assert, even after 5
sec. when:
•
Images are created on the
drum.
•
MUSIC patterns are created
on the transfer belt.
The BICU received no feedback
(LOW signal) from the LD unit to
indicate that the lasers started
firing at the prescribed time to
create the patterns.
•
GAVD (ASIC) on the BICU defective
•
PCI I/F on the IPU defective
•
ASIC on the IOB defective
•
Controller board disconnected, defective
•
Harness between the BICU and LDB unit
disconnected, loose, or defective.
•
Check board connections, replace