Ricoh Aficio FT4027, Service Manual

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12. JAM DETECTION
– Sorter Jams –
The sorter stapler main control board detects jams when the following
conditions are detected. In these cases, a jam signal is sent to the copier,
then the copier stops the paper feed and indicates a sorter misfeed.
– Normal (Proof) mode –
J1: The entrance sensor has not turned on 700 ms after the copier exit
sensor turns on.
J2: The entrance sensor stays on for more than a certain number of pulses
(for example, 280 pulses for A4 sideways).
J3: The proof exit sensor has not turned on 300 pulses after the entrance
sensor turns on.
J4: The proof exit sensor stays on for more than a certain number of pulses
(for example, 280 pulses for A4 sideways).
– In Sort/Stack or Staple Mode –
J1 and J2: Same as Normal mode.
J5: The bin jam sensor has not turned on for 600 pulses after the entrance
sensor turns on.
J6: The bin jam sensor stays on for more than a certain number of pulses (for
example, 280 pulses for A4 sideways).
J7: The bin jam sensor is still on when the bin drive motor turns on.
(700 ms)
280 pls
ON Check
Copier Exit
Sensor
Entrance
Sensor
Proof Exit
Sensor
Bin Jam
Sensor
*This is the jam detection timing for the 1st bin.
Timing depends on the bins used.
1 pulse ¢ 3.61 ms
A664D526.wmf
JAM DETECTION
A207/A208/A211 3-24 SM