Image Reading System: Foggy Background Or Rough Image - NEC NEFAX 671 Service Manual

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Image reading system: Foggy background or rough image

<Troubleshooting Procedures>
Step Check
1 Does sunlight or any other extraneous
light enter the machine?
2 Is the document damaged or dirty?
3 Improper charging.
4 Defective PC Drum.
5 Are there no bent connector pins on the
cables connecting the control boards,
are all connectors correctly plugged in,
and are no cables broken?
<Sample of Image Quality Problem>
4011T004AA
Result
YES Protect the copier from extrane-
YES Replace the document.
YES Replace the HV1.
YES Replace the Drum Cartridge.
NO
T-30
Action
ous light.
Correctly plug in the connectors.
Replace connection cables.