Ricoh MT-C1 Service Manual page 430

B140/B246 SERIES SERVICE MODE
181 D CIS lamp abnormal
After the CIS lamp trigger goes on,
the CIS lamp is not detected on.
Detecting the lamp on or off
determines the peak white level
value for shading correction. (If the
peak level is determined to be
below a certain level, the CIS lamp
is judged to be off.)
183 C CIS auto adjust error
Automatic adjustment of the CIS
unit failed.
184 D 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.
• CIS lamp defective
• CIS power supply board defective
• CIS lamp regulator defective
• Harness between lamp and lamp
regulator is disconnected.
• Harness between CIS, ADF is
disconnected
• CIS exposure glass dirty.
• White roller dirty or installed incorrectly
• CIS unit defective
• CIS unit defective
• CIS exposure glass dirty
• White roller dirty or installed incorrectly
• CIS unit defective
• Harness between the CIS, ADF is
disconnected
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15 February 2006