Oki C7500n Maintenance Manual page 136
Color led page printer
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Also See for C7500n:
- User manual (485 pages) ,
- Configuration manual (78 pages) ,
- Reference manual (44 pages)
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(A)
M •
NO
[NG CALIBRATION LEFT /RIGHT] display.
•
YES Is the color irregularity sensor cover dirty?
YES: Faulty cleaning operation of the rear sensor cover due to the cleaning blade on the rear
side of the shutter. Replace the shutter and sensor cover, and recover cleaning
capability.
M
•
NO
Check the connection of the Z71 board (color irregularity board) connector, RSNS on the
K7N/K7V board (engine board), and power connector. Did the printer recover after checking
the connections?
YES End.
M
•
NO
Replace the Z71 board. Did the printer recover?
YES End.
M
•
NO
Replace the engine board. Did the printer recover?
YES End.
M
•
NO
Replace the cables for the Z71 board and engine board. Did the printer recover?
YES End.
M •
NO
[DYNAMICRANGE LEFT /RIGHT] display.
•
YES Is the color irregularity sensor cover dirty?
YES Faulty cleaning operation of the rear sensor cover due to the cleaning blade on the rear
side of the shutter. Replace the shutter and sensor cover, and recover cleaning
capability.
M
•
NO
Is the open/close operation of the shutter abnormal?
•
YES Replace the shutter. Did the printer recover?
YES End.
M
•
NO
Replace the shutter open/close solenoid. Did the printer recover?
YES End.
M
•
NO
Replace the belt unit. Did the printer recover?
YES End.
M
•
NO
Replace the ID unit. Did the printer recover?
YES End.
(B)
41955801TH Rev.8
Oki Data CONFIDENTIAL
136 /
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Table of Contents
Troubleshooting
