Laser Optical System Service Call - Toshiba DP1600 Service Handbook

C97 Vacuum fan motor abnormality
1. Check if each connector between the paper guide assembly and the relay PWA (CN34) is
disconnected.
2. Check if each connector between the relay PWA (CN21) and the main PWA (CN15) is dis-
connected.
3. Check if each connector pin is removed or the harness is broken.
4. Check if any conductor pattern on the relay and main PWA is open- or short-circuited.
5. Replace the paper guide assembly.
6. Replace the relay PWA.
7. Replace the main PWA.
C98 Clock IC abnormality
Is the service call generated even if the switch of the body is turned off and on again?
NO
Be left as it is for a while.
YES
1. Check if any conductor pattern on the main PWA (IC75 and surrounding area) is open- or
short-circuited.
2. Replace the main PWA if the problem seems to happen frequently.
C99 PFC microcomputer abnormality
Is the service call generated even if the switch of the body is turned on again?
NO
Be left as it is for a while.
YES
1. Check if any conductor pattern on the PFC PWA is open- or short-circuited.
2. Replace the PFC microcomputer or the PFC PWA if it seems to happen frequently.

4.1.16 Laser optical system service call

CA1 Polygon motor abnormality
1. Check if each connector between the laser scanner unit and the relay PWA (CN26) is dis-
connected.
2. Check if each connector pin is removed or the harness is broken.
3. Check if any conductor pattern on the relay and main PWA is open- or short-circuited.
4. Replace the relay PWA.
5. Replace the main PWA.
6. Replace the laser scanner unit.
December 2000 © TOSHIBA TEC 4 - 49 1600/2000/2500 TROUBLESHOOTING