Ricoh D158 - Sc4 Xx: Image Processing

Service Call Conditions
D158/D159/D160/D161/D170 5-16 SM
SC4xx: Image Processing
No.
Definition
Symptom Possible Cause
440 B
Image transfer positive electrode current error
An interrupt checks the status
of the power pack every 20
ms. This SC is issued if the
BCU detects a short in the
power pack 10 times
consecutively.
 Defective image transfer roller
 Defective high voltage supply unit
 Connection error
 Image transfer unit is not installed
correctly.
460 B
Separation power pack output error (D158/D159)
An interrupt checks the status
of the power pack every 20
ms. This SC is issued if the
BCU detects a short in the
power pack 10 times at D
(ac).
 High-voltage leak
 Loose connection
 Broken harness
 Defective-high voltage supply unit
490 B
Toner transport motor error (D158/D159)
When the toner transport
motor is ON
 Motor lock
 Defective motor drive