Malfunction Status Troubleshooting - Canon DU-82 Service Manual

VI. MALFUNCTION STATUS TROUBLESHOOTING
M-1 Side registration guide failure
<Possible causes>
1. The side registration guide installation failure
Action: Re-install the side registration guide correctly.
2. The side registration guide home position sensor lever is damaged.
Action: Replace it.
3. Gears are damaged.
Action: Replace it if any gear is damaged.
4. Poor connection with the connectors of the SIDE REGISTRATION GUIDE HOME POSITION
DETECTION signal line and of the SIDE REGISTRATION MOTOR DRIVE signal line.
Action: Reconnect the connector J2006 and the J2005 on the duplexing driver PCB.
5. The side registration guide home position sensor failure
Action: Replace it.
6. The side registration motor failure
Action: Replace it.
7. The duplexing driver PCB failure
Action: Replace it.
M-2 Duplex feed unit failure
<Possible causes>
1. The duplex feed roller 1 home position sensor lever is damaged.
Action: Replace it.
2. Gears are damaged.
Action: Replace it if any gear is damaged.
3. Poor connection with the connectors of the DUPLEX FEED ROLLER 1 HOME POSITION
DETECTION signal line, of the DUPLEXING UNIT MOTOR DRIVE signal line and of the
DUPLEX FEED CLUTCH DRIVE signal line.
Action: Reconnect the connector J2007, J2004, and J2003 on the duplexing driver PCB.
4. The duplex feed roller 1 home position sensor failure.
Action: Replace it.
5. The duplex feed clutch failure.
Action: Disconnect the connector J2003 of the duplex feed clutch. Measure the resistance
between the connector J2003-1 and J2003-2 on the cable. If it is not about 140 Ω,
replace the duplex feed clutch.
6. The duplexing unit motor failure
Action: Replace it.
CHAPTER 4
4 - 9