Ricoh S-C4.5 Field Service Manual page 155

No.
Definition
SBU black level correction error
• The automatic SBU adjustment has
failed to correct the black level three
times at the pre-offset adjustment.
• The automatic SBU adjustment has
141 B
failed to correct the black level ten
times at the PGA adjustment.
• The automatic SBU adjustment has
failed to correct the black level ten
times at the offset adjustment.
SBU white/black level correction error
The automatic SBU adjustment has failed
142 B
to correct the white level ten times at the
PGA adjustment.
Communication Error between BICU and SBU
144 B
The BICU cannot correctly establish
communication with the SBU.
Automatic SBU adjustment error
The white levels of the white plate and the
145 D
white paper are extraordinarily different
during the Scan Auto Adjustment (
SP4-428-001).
Symptom Possible Cause
• Defective SBU board
• Defective exposure lamp
• Unclean white plate
• Incorrect position or width of white
plate scanning ( SP4-015)
• Defective SBU board
• Loose connection of the flat cable
between the BICU and the SBU
• Defective flat cable between the BICU
and the SBU
• Defective BICU
• Defective SBU
• Defective exposure lamp
• Unclean white plate
• Incorrect position or width of white
plate scanning ( SP4-015)
• Defective BICU board
• Defective SBU board
SC Tables
6
153