Oki B4100 Maintenance Manual page 53

[JAM error]
2-1
Paper input jam (Paper 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
• 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 registration motor rotating?
• Yes Replace the one-way clutch gear of the hopping roller assembly.
• No Is RM connector on the main control board being connected properly?
• No Connect RM connector properly.
• Yes Is the coil resistance (normal resistance: both between
Pins 1 and 2, as well as Pins 3 and 4 are about 7.9Ω) of the
registration motor normal?
• No Replace the registration motor.
• Yes Replace the main control board.
42640901TH Rev.1
Replace the inlet sensor plate.
Exit roller
Heat roller
Transfer roller
Toner Inlet
sensor sensor 2
Paper end sensor
Hopping
roller
Oki Data CONFIDENTIAL
Outlet sensor
Paper sensor
Registration roller
Inlet sensor 1
53 /