Ricoh Aficio MP 1600L2, Field Service Manual

Page: 181 / 264

No.
Definition
Symptom Possible Cause
143 D
SBU white/black level correction error
The automatic SBU adjustment has
failed to correct the black level.
The automatic SBU adjustment has
failed to correct the white level
twenty times consecutively.
• Exposure lamp defective
• Dirty white plate
• Incorrect position or width of white plate
scanning (SP4015)
• BICU board defective
• SBU board defective
144 B
Communication Error between BICU and SBU
The BICU board cannot detect the
SBU connect signal.
• The flat cable between the BICU board and
the SBU has a poor connection
• The flat cable between the BICU board and
the SBU is damaged
• BICU board defective
• SBU defective
145 D
Automatic SBU adjustment error
During the automatic SBU
adjustment, the machine detects
that the white level read from the
white plate or paper is out of range.
(SP4015)
• Exposure lamp defective
• Dirty white plate
• Incorrect position or width of white plate
scanning (SP4015)
• BICU board defective
• SBU board defective
193 B
Image transfer error
Scanned images are not
transferred to the controller
memory within 1 minute.
• BICU board defective
• Controller board defective
198 B
Memory address error
The BICU board does not receive
memory addresses from the
controller board.
• The firmware programs of the engine and
the controller do not match.
• BICU board defective
• Controller board defective
Service Call Conditions
179
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