Ricoh D131 Service Manual page 482

TD sensor adjustment error: Adjustment output abnormal
During the TD sensor auto adjustment, the TD sensor output voltage
(Vt) is 2.5 volts or higher even though the control voltage is set to the
minimum value (PWM = 0). When this error occurs, SP2-906-1 reads
D
0.00V.
Note: This SC is released only after correct adjustment of the TD
sensor has been achieved. Switching the machine off and on will
SC360-01 cancel the SC display, but does not release ID sensor toner supply.
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TD sensor adjustment error: Timeout Error
During the TD sensor auto adjustment, the TD sensor output
voltage (Vt) does not enter the target range (3.0 ± 0.1V) within 20
s. When this error occurs, the display of SP2-906-1 reads 0.00V.
D
Note:
This SC is released only after correct adjustment of the TD sensor
SC360-11
has been achieved. Switching the machine off and on will cancel
the SC display, but does not release ID sensor toner supply.
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SM Appendix
TD sensor defective
TD sensor harness disconnected
TD sensor connector disconnected or defective
IOB defective
Toner bottle motor defective
Note: When the TD sensor is defective, the toner supply is
controlled using pixel count and the ID sensor.
TD sensor defective
TD sensor harness disconnected
TD sensor connector disconnected or defective
IOB defective
2-15
SC300: Image Development 1
D131/D132/D133