Ricoh B132 Service Manual page 433

SC233 D FGATE error 1: Feedback remains LOW for Y write
After the start of timing to create
the yellow image, the PFGATE
register of the GAVD does not
assert, even after 5 sec. when:
• Images are created on the
• MUSIC patterns are created
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.
SC234 D FGATE error 1: Feedback remains HIGH for M write
After the start of timing to create
the magenta image, the
PFGATE register of the GAVD
does not assert, even after 5
sec. when:
• Images are created on the
• MUSIC patterns are created
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.
SC235 D FGATE error 1: Feedback remains LOW for M write
After the start of timing to create
the magenta image, the
PFGATE register of the GAVD
does not assert, even after 5
sec. when:
• Images are created on the
• MUSIC patterns are created
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.
SM
drum.
on the transfer belt.
drum.
on the transfer belt.
drum.
on the transfer belt.
SERVICE CALL CONDITIONS
• GAVD on the BICU defective
• PCI I/F on the IPU defective
• ASIC on the IOB defective
• Check board connections, replace
• GAVD on the BICU defective
• PCI I/F on the IPU defective
• ASIC on the IOB defective
• Controller board disconnected, defective
• Harness between the BICU LDB unit
disconnected, loose, or defective.
• Check board connections, replace
• GAVD on the BICU defective
• PCI I/F on the IPU defective
• ASIC on the IOB defective
• Check board connections, replace
4-33 B132/B200