Ricoh G147 Service Manual page 156

One of the following ID sensor
output voltages is detected at ID
sensor initialization.
Vsg less than 4.0V when the
maximum PWM input (255) was
applied to the ID sensor.
Vsg exceeded 4.0V when the
minimum PWM input (0) is
applied to the ID sensor.
ID sensor timeout abnormal at
adjustment
354 D
Vsg fell out of the adjustment target
range (4.0 ± 0.2V) at the start of Vsg
checking after 20 sec.
TD sensor error: Abnormal
measurement
The TD sensor output voltage was
less than 0.5V, or more than 4.8V 10
390 D
consecutive times during copying.
-or-
The output was less than 2.5V after
a new PCDU was installed.
TD sensor error: Auto adjust error
During automatic adjustment of the
391 D
TD sensor, output voltage was less
than 1.8V, or more than 4.8V during
TD sensor initial setting.
G147
ID sensor defective
IOB defective
HVPS defective
ID sensor dirty
ID sensor connector or harness
loose, broken, or defective
ID sensor defective
IOB defective
HVPS defective
ID sensor dirty
TD sensor connector or harness
loose, broken, defective
TD sensor defective
IOB) defective
Toner supply defective (confirm
that the toner seal strip has been
removed from toner cartridge)
TD sensor connector or harness
loose, broken, defective
TD sensor defective
IOB defective
Toner supply defective (confirm
that the toner seal strip has been
removed from toner cartridge)
4-6 SM