Oki C9500 Maintenance Manual page 132

(A)
• 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.
• NO Check the connection of the Z71 board (color irregularity board) connector, RSNS on the
K7N board (engine board), and power connector. Did the printer recover after checking the
connections?
YES End.
• NO Replace the Z71 board. Did the printer recover?
YES End.
• NO Replace the engine board. Did the printer recover?
YES End.
• NO Replace the cables for the Z71 board and engine board. Did the printer recover?
YES End.
• 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.
• NO Is the open/close operation of the shutter abnormal?
• YES Replace the shutter. Did the printer recover?
YES End.
• NO Replace the shutter open/close solenoid. Did the printer recover?
YES End.
• NO Replace the belt unit. Did the printer recover?
YES End.
• NO Replace the ID unit. Did the printer recover?
YES End.
(B)
41956001TH Rev.6
Oki Data CONFIDENTIAL
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