SC392 D
Development bias error
The PWM duty level was detected higher than 5% within 100 ms after high voltage
output started, and the feedback voltage was detected less than 0.3 V for more than
200 ms.
• Harness connection between CGB power pack and IOB loose, broken,
defective
• CGB power defective
• High voltage cable damaged
Group 400: Around the Drum (Transfer, Separation, Cleaning)
SC400 B
ID sensor error 1: automatic adjustment error
During the process control self-check, the Vsg value (reflectivity of the bare drum
surface) could not be adjusted to within 4.0±0.2V within 20 sec. after automatic
adjustment began.
• ID sensor dirty
• ID sensor harness loose, broken, defective
• ID sensor harness connection at IOB loose, broken, defective.
• ID sensor defective
• Exposure unit defective
• Development unit defective
• TD power pack defective
SC401 B
ID sensor error 2: Vsg
When the ID sensor was calibrated, Vsg (reflectivity of the bare drum surface) was
detected less than 2.5V after two attempts.
-or-
After calibration, Vsg was detected as 5.0V at PWM adjustment and PWM=0.
• Dirty ID sensor
• ID sensor harness connection loose, broken, defective
• TD power pack defective
• IOB defective
5. Appendix: Service Call Conditions
42
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