Ricoh TH-C1b Service Manual page 170

10 February 2005
No.
Definition
161 D IPU error
The self-diagnostic error for the IPU
occurs immediately after the main
power is turned on.
195 D Serial number mismatch
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.
199 D PSU fan error
The PSU fan low signal is detected
for 2 seconds when the PSU fan
controller sends the high signal to the
PSU fan.
201 D Polygon motor error
• The polygon motor starts operating
or changes its speed. → The lock
signal is not detected within 5
seconds.
• The polygon motor stops operating.
→ The lock signal is still detected
for 3 seconds.
• The polygon motor is operating. →
The lock signal remains undetected
for 0.5 seconds.
220 D 1st beam synchronization error
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.
221 D 2nd beam synchronization error
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.
230 D FGATE on error
A transfer belt mark is detected. →
No FGATE on signal is detected
within 1 second.
231 D FGATE off error
An FGATE assert signal is detected.
→ The FGATE negate signal is not
detected within 30 seconds.
Symptom
4-3
Possible Cause
• IPU board defective
• BICU board defective (defective
connection between ASICs)
• NVRAM defective
• BICU replaced without original NVRAM
• PSU fan defective
• Disconnected or damaged harness
• Defective polygon motor
• Defective harness
• Disconnected synchronization detector
board
• Defective LD unit
• Defective BICU
• Disconnected synchronization detector
board
• Defective LD unit
• Defective BICU
• Defective BICU
• Defective BICU
SERVICE CALL