Ricoh D009 Service Manual page 373

SBU auto adjust error (B/W Scanner model only)
One of the following occurred:
When the machine was powered on, automatic adjustment of the SBU
failed.
Automatic white density adjustment failed when reading standard white
plate.
143 C
Exposure lamp defective
Lamp stabilizer defective
Lamp stabilizer connection loose, disconnected or damaged
White plate mounting is incorrect or defective
Scanner mirror or scanner lens out of position or dirty
SBU, SCNB defective
BICU defective
Harness connections
-001: SBU connection error
The SBU connection cannot be
D
detected at power on or recovery
from the energy save mode.
-002: SBU serial communication error
144 D
The power ON of the SBU is not
detected.
-003: GASBU reset error
D
The serial communication does not
work.
SM Appendix
Service Call Conditions
Defective SBU
Defective harness
Defective detection port on the
BICU
Defective SIO, SBU or SCNB
Defective harness
Defective detection port on the
BICU
Defective SBU
Defective detection circuit on the
BICU
Defective harness
3-5 D009/D011/D012/D013/D091/D092