Paper Input Jam - Oki B4350 Service Manual

[JAM error]

Paper input jam

2-1
• 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
• 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 motor rotating?
• Yes Replace the one-way clutch gear of the hopping roller assembly.
• No Is HM connector on the main control board being connected properly?
• No Connect HM connector properly.
• Yes Is the coil resistance (normal resistance: both between
Pins 1 and 2, as well as Pins 3 and 4 are about 10.3 Ω) of
the hopping motor normal?
• No Replace the hopping motor.
• Yes Replace the main control board.
42641101TH Rev.1
Replace the inlet sensor plate.
Exit roller
Heat roller
Transfer roller
Toner Inlet
sensor sensor 2
Hopping
Paper end sensor
roller
Oki Data CONFIDENTIAL
Outlet sensor
Paper sensor
Registration roller
Inlet sensor 1
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