Sc4Xx: Image Processing - Ricoh D158 Service Manual

Service Call Conditions

SC4xx: Image Processing

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