Canon C2050 Service Handbook page 156

SERVICE MODE
COPIER>DISPLAY
FF: type of jam
Code
01ff Delay jam
02ff Stationary jam
03ff Timing jam
10ff Residual jam at power-on
11ff Front cover open jam
00ff Jam in accessory
ff: jam sensor
Code
FF01 Pre-registration sensor (S12)
FF02 Vertical path sensor (S11)
FF03 Cassette 1 pickup senor (S9)
FF04 Cassette 2 pickup sensor (S10)
FF05 Vertical path paper sensor (S44)
FF06 Cassette 3 pickup sensor (S42)
FF07 Cassette 4 pickup sensor (S43)
FF08 Deck feed sensor (PS106)
FF09 Deck pickup sensor (PS101)
FF20 Transparency sensor (S13/S14)
FF31 Post-registration sensor (S52)
FF32 Fixing assembly inlet sensor (S25)
FF33 Internal delivery sensor (S27)
FF34 External delivery sensor (S28)
FF61 Delivery vertical path sensor (S29)
FF62 Duplex unit inlet sensor (S30)
FF63 Duplex unit lower sensor (S33)
FF64 Re-pickup sensor (S31)
"0231" (jam by wrong paper size setting)
The paper moved to the transfer belt is shorter in feeding length than the one selected.
S-14
Type
T00-201-01
Sensor
T00-201-02