Service manual

FrameMaker Ver.5.5E(PC) Di350 TROUBLESHOOTING
98.12.09
T- 3 4
C0500, C0510
C0520
Step Check Item Result Action
1 Does H1 turn ON after the malfunc-
tion is reset?
YES Check TH1 for contamination or
installation.
2 Is there continuity across CN3-1
and 2 on the Fusing Unit end with
CN3 (2P) disconnected?
NO Check H1, TS1, and TF1 for conti-
nuity.
3 Is there continuity across 1A and
1B, and across 2A and 2B, of S3
when S3 is turned ON?
NO Change S3.
4 Is the resistance of TH1 (across
CN5-2 and 3 on the Fusing Unit
end) infinity?
YES Change TH1.
5 Is Fuse F2 on PU1 conducting? YES Change PU1 or PWB-A.
NO Change the fuse.
Step Check Item Result Action
1 Is TH1 installed properly? NO Install TH1 correctly.
2 Is TH1 dirty? YES Clean or change TH1.
3 Is the circuit across CN5-2 and 3 on
the Fusing Unit end closed when
CN5 (4P) is disconnected?
YES Change TH1.
NO Change PWB-A or PU1.