Minolta Di350 Service Manual page 221

FrameMaker Ver.5.5E(PC) Di350 TROUBLESHOOTING
98.12.09
C0500, C0510
Step
1 Does H1 turn ON after the malfunc-
tion is reset?
2 Is there continuity across CN3-1
and 2 on the Fusing Unit end with
CN3 (2P) disconnected?
3 Is there continuity across 1A and
1B, and across 2A and 2B, of S3
when S3 is turned ON?
4 Is the resistance of TH1 (across
CN5-2 and 3 on the Fusing Unit
end) infinity?
5 Is Fuse F2 on PU1 conducting?
C0520
Step
1 Is TH1 installed properly?
2 Is TH1 dirty?
3 Is the circuit across CN5-2 and 3 on
the Fusing Unit end closed when
CN5 (4P) is disconnected?
Check Item
Check Item
Result
YES Check TH1 for contamination or
installation.
NO Check H1, TS1, and TF1 for conti-
nuity.
NO Change S3.
YES Change TH1.
YES Change PU1 or PWB-A.
NO Change the fuse.
Result
NO Install TH1 correctly.
YES Clean or change TH1.
YES Change TH1.
NO Change PWB-A or PU1.
T-34
Action
Action