Panasonic KX-MB771GR Service Manual page 125

CROSS REFERENCE:
FAN MOTOR SECTION (P.37)
When the recording paper jam is occurred, the service mode *630 distinguishes the cause.
0:No Paper Jam
1:The paper was pulled into the unit.
2:The paper was longer than the maximum length of the Resistance sensor.
3:The paper exit was not detected after the registration.
4:The paper was longer than the maximum length of the paper exit sensor.
5:The Resistance & Manual paper sensor or paper exit sensor was turned ON before the motor started to rotate.
6:The Resistance& Manual paper sensor chattered.
7:The sorter enter sensor chattered.
12.3.8.6. BACK SIDE OF THE RECORDING PAPER IS DIRTY
CROSS REFERENCE:
HIGH VOLTAGE SECTION (P.165)
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KX-MB771GR