Ricoh SP 1200S Service Manual Page 356

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  • TROUBLESHOOTING
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Image Defect Troubleshooting (Defect of the Print)
M085/M086 6-54 SM
If the machine prints the same pattern, especially vertical streaks, continuous, black
vertical streaks may appear on the paper as the electrostatic performance of the drum
is decreased.
10 Black vertical streaks in a light background
User Check
1. Clean the inside of the machine and the corona wire in the drum unit.
2. Replace the toner cartridge with a new one.
Possible cause and Remedy
1. Drum unit failure
Is the problem solved after replacing the drum unit?
Yes: Replace the drum unit.
11 Black horizontal stripes
User Check
1. Clean the inside of the machine and the corona wire in the drum unit.
2. Replace the drum unit with a new one.
Possible cause and Remedy
1. Dirt on the charge electrode
Are the electrodes on the drum unit and machine body dirty?
Yes: Clean both electrodes. (
p.6-21 "Electrodes location on the drum unit" and
p.6-21 "Electrodes location on the machine")
2. Paper tray ground terminal located in the machine body
Is the paper tray ground terminal bent, which is located in the machine body? (Refer to
figure below.)
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