Service manual

Service Call Conditions
M052/M053/M054 6-8 SM
240 B
LD error
The IPU detected a problem at the LD unit.
 LD unit harness broken, defective
 BICU harness broken defective
 LD unit defective
 BCU defective
SC3xx: Image Processing – 1
312 D
Charge level output error
The PWM output level was detected higher or lower than 50% for 200 ms.
 HVPS (High Voltage Power Supply) board harness loose, broken.
 Terminal loose or broken at the charge rollers T
320 D
Development bias leak
A development bias leak signal is detected.
 Poor connection at the development bias terminal
 High voltage supply board defective
SC4xx: Image Processing - 2
440 D Transfer roller leak error 1
A transfer roller current leak signal wad detected higher or lower than 50%
for 200 ms. (The current feedback signal for the transfer roller was not
detected within the correct time.)
 High voltage supply board set incorrectly or defective
 Transfer roller set incorrectly or damaged
 Transfer roller set incorrectly