Service manual

Service Call Conditions
M052/M053/M054 6-6 SM
195 D
Serial Number Mismatch
Serial number stored in the memory does not have the correct code.
 NVRAM defective
 BCU replaced without original NVRAM
1. Reinstall the original NVRAM in the replaced BCU.
2. Turn off and on the main power switch of the copier if a new NVRAM is
installed in the BCU.
SC2xx: Laser Exposure
202 D
Polygon motor error 1: ON timeout
The polygon mirror motor did not reach the targeted operating speed
within 10 sec. after turning on or changing speed
203 D
Polygon motor error 1: OFF timeout
The polygon mirror motor did not leave READY status within 3 sec. after
polygon motor switched off.
204 D
Polygon motor error 1: XSCRDY signal error
The XSCRDY signal remained HIGH four times consecutively while the
LD unit was firing.
 Polygon motor/driver board harness loose or broken
 Polygon motor/driver board defective
 Laser unit defective
 BICU defective