Ricoh B234 - Page 23

SERVICE CALL CONDITIONS
SM 4-21 B234/B235/B236/D101/D102/D103
Trouble-
shooting
Development Unit Set Error
SC344 C
The development is not
installed, or it is installed
incorrectly. The development
unit set switch is checked every
time the machine is turned on
and when the front doors are
closed.
1. Pull out the development unit.
2. Install it again.
3. Close the front doors
4. Cycle the machine off/on
TD Sensor Output Error 1: Vt Above Upper Limit
SC360 C
The result of the check of the
TD sensor output (Vt) after
every copy for 10 continuous
copies was Vt ≥ 4.0V (out of
range).
• TD sensor dirty or defective
• TD sensor connector to BCU loose, broken,
defective
• IOB defective
• BCU defective
TD Sensor Output Error 2: Vt Below Lower Limit
SC364 C
The result of the check of the
TD sensor output (Vt) after
every copy for 10 continuous
copies was Vt ≤ 0.5V (out of
range).
• TD sensor dirty or defective
• TD sensor connector to BCU loose, broken,
defective
• IOB defective
• BCU defective
TD Sensor Adjustment Error 1
SC368 B
The value for Vref could not be
set because:
• The target voltage could not
reach 2.5V with maximum
PWM (255) application
• The target voltage exceeded
2.5V with minimum PWM (0)
application.
• TD sensor connector or harness to the
IOB loose, broken, defective
• TD sensor defective
• IOB defective
• BCU defective
TD Sensor Adjustment Error 2
SC372 B
The TD sensor output
voltage is not adjusted to 2.5
± 0.1 V within 60 s during
initialization of the TD sensor
with SP2801.
Note: When an abnormal
condition occurs, “0” is
displayed for SP2906 (Vcont
Manual Setting).
• TD sensor connector, harness loose,
broken, defective
• TD sensor defective
• IOB defective