Ricoh MP C6502SP Field Service Manual page 1044

5. Troubleshooting
SC No.
SC220-01
SC220-02
SC220-03
SC220-04
1042
Level Error Name/Error Condition/Major Cause/Solution
D Leading Edge: LD1 synchronization detection error: Bk
D Leading Edge: LD1 synchronization detection error: Cy
D Leading Edge: LD1 synchronization detection error: Ma
D Leading Edge: LD1 synchronization detection error: Ye
The leading edge LD1 synchronization detection signal of the
corresponding color was not output within 100 ms while the polygon
mirror motor was operating at normal speed.
Details:
• When a synchronization detection error flag is asserted to VTEC
status register.
• After the polygon turned on, the CPU monitored for error flags in
100 ms cycles and detected an error flag.
• The interface harness to the synchronization detection unit damaged
or not connected correctly.
• Synchronization detection board defective
• Beam does not enter photodetector..
• Abnormality around VTEC
• LDB defective
• BCU defective
• Large main scan magnification rate
• Cycle the machine off/on.
• Replace the laser unit.
• Replace the IPU board.
• Replace the BCU board.
• Correct the main scan magnification SP*
* SP2-184-006 through 009 = 269600
SP2-102-001,007 = 123
SP2-102-016 through 025 = 0
• Adjust SP2-184-006 through 009 while checking the images until
the values of SP2-102-001,007 become 123 ± 30.