Ricoh B064 Service Manual page 253

SC No.
183 D CIS auto adjust error
Automatic adjustment of the CIS
unit failed.
184 C CIS transmission error
When the CIS is powered on, the
ADF detects one of the following
abnormal conditions on the CIS
unit:
• The SOUT signal does not go
high within 1 s after power on.
• The SOUT signal goes high
within 1 s after power on, but the
SBU ID cannot be read after 3
attempts.
SM
Symptom
4-13
SERVICE CALL CONDITIONS
Possible Cause
• CIS unit defective.
• CIS exposure glass dirty.
• White roller dirty or installed incorrectly.
• PSU power supply (+5V, –12V) is
abnormal.
• IPU defective
• CIS unit defective.
• Harness between the CIS, ADF is
disconnected.
• PSU power (5V) is abnormal.
• BCU, IPU defective
B064/B065