Ricoh U-C1 B051 - Page 154

26 July 2002 SERVICE CALL
4-3
Trouble-
shooting
No.
Definition
Symptom Possible Cause
Serial number mismatch 195 D
Serial number stored in the memory
is not correct.
NOTE: Check the serial number with
SP5-811-002.
If the stored serial number is
incorrect, contact your product
specialist for details of how to solve
the problem.
• NVRAM defective
• BICU replaced without original NVRAM
Polygon motor error 201 D
• The polygon motor starts operating.
→ The lock signal is not detected
within 20 seconds.
• The polygon motor starts operating.
→ The lock signal is detected
within 20 seconds. → After a 3-
second waiting time, no lock signal
is detected within 20 seconds.
• The polygon motor stops operating.
→ The lock signal is not detected
within 20 seconds.
• The polygon motor is operating. →
The lock signal remains undetected
for 0.5 seconds.
• Defective polygon motor
• Defective harness
1st beam synchronization error 220 D
A polygon motor lock is detected; the
LD door is closed; and the LD
remains on. → The LD error (1st
beam synchronization error)
continues for 0.5 seconds.
• Disconnected synchronization detector
board
• Defective LD unit
• Defective BICU
2nd beam synchronization error 221 D
A polygon motor lock is detected; the
LD door is closed; and the LD
remains on. → The LD error (2nd
beam synchronization error)
continues for 0.5 seconds.
• Disconnected synchronization detector
board
• Defective LD unit
• Defective BICU
FGATE on error 230 D
A transfer belt mark is detected. →
No FGATE on signal is detected
within 1 second.
• Defective BICU
FGATE off error 231 D
An FGATE assert signal is detected.
→ The FGATE negate signal is not
detected within 30 seconds.
• Defective BICU
LD error 241 D
An LD error continues for 0.5
seconds. (After an LD error is
detected, an LD error release is
written to the GAVD chip during
monitoring.)
• Defective LD unit