Ricoh D158 - Page 279

Service Call Conditions
D158/D159/D160/D161/D170 5-15 SM
Trouble-
shooting
No.
Definition
Symptom Possible Cause
390 B
TD sensor error
The TD sensor outputs less
than 0.2 V or more than 4.0 V
10 times consecutively during
copying.
 TD sensor abnormal
 Poor connection of the PCU
391 B
Development bias leak
A development bias leak
signal is detected.
 Poor connection of the PCU
 High voltage supply board
392 B
TD sensor initial setting error
TD sensor initial setting is not
performed correctly.
 ID sensor
 No developer
 Drum does not turn
 Development roller does not turn
 Poor connection of the PCU
 The voltage is not applied to charge
roller