Ricoh B234 - Page 17

SERVICE CALL CONDITIONS
SM 4-15 B234/B235/B236/D101/D102/D103
Trouble-
shooting
Scanner Motor Error 5
SC129 C
The scanner motor speed is
abnormal. The machine will not
stop scanning even after the
machine detects that motor
speed is abnormal.
• Scanner motor defective
• Scanner drive mechanism defective
• PSU-Eb board defective
• MCU board defective (scanner motor
control unit)
Black level detection error
SC141 B
When the scanner was turned
on, AGC (automatic gain control)
failed to achieve the target value
of 10 ±3.
• SBU IPU harnesses defective
• BCU  IPU harnesses defective
• SBU defective
• IPU defective
• BCU defective
White level detection error
SC142 B
When the scanner was turned
on, the second sampling by
AGC (automatic gain control)
failed to achieve a value within
the range –7 to 0 of the target
value 128.
• Standard white plate defective, dirty
• Moisture inside the scanner unit
• SBU IPU harnesses defective
• BCU  IPU harnesses defective
• SBU defective
• IPU defective
• BCU defective
SBU Error 1
SC143 C
When the scanner was turned
on, the SBU (Sensor Board Unit)
level adjustment, black level
check, and final SBU white level
check failed.
• SBU defective
• IPU defective
• BCU defective
• Harness between the SBU and IPU
defective
• Harness between the BCU-IPU defective
• Standard white plate not installed
correctly, or is dirty
• Scanner mirrors and/or lenses are dirty
or installed incorrectly
SBU Error 2
SC144 B
At power on:
• The SYDI terminal signal did
not go HIGH within 1 s
• The specified SBU (Sensor
Board Unit) ID (GASBUP and
LM98513) could not be read
after 3 tries
• SBU defective
• BCU defective
• Harness between SBU and IPU defective