43502101TH Rev.1 63 /
Oki Data CONFIDENTIAL
[JAM error]
2-1 Paper input jam
• Does the JAM error occur when the power is turned on?
• Yes Is the paper at the inlet sensor?
• Yes Remove the paper.
• No Is the operation of the inlet sensor plate normal (moves freely when it is touched)?
• No Replace the inlet sensor plate.
• Yes Clean the inlet sensor on the high voltage/sensor board, or replace the high voltage/
sensor board.
• No Does the JAM alarm occur after paper feeding?
• Yes Is the paper fed to the inlet sensor plate?
• Yes Is the operation of the input sensor plate normal (moves freely when it is touched)?
• No Replace the inlet sensor plate.
• Yes Clean the inlet sensor on the high voltage/sensor board or replace the high voltage/
sensor board.
• No Replace the hopping roller rubber or paper cassette.
• No Is the hopping roller rotating?
• Yes Set the paper tray properly.
• No Is the hopping clutch working normally?
• Yes Replace the Boss and Shaft of the hopping roller assembly.
• No Is CLT connector on the main control board being connected properly?
• No Connect CLT connector properly.
• Yes Is the coil resistance (normal resistance: between Pins 1
and 2, is about 144 Ω) of the hopping clutch normal?
• No Replace the hopping clutch.
• Yes Replace the main control board.
Outlet sensor
Exit roller
Heat roller
Transfer roller
Paper sensor
Registration roller
Inlet sensor
Toner
sensor
Paper end sensor
Hopping
roller
Paper feeding direction
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