Canon LBP 2460 Service Manual - Page 126

CHAPTER 2 2. Switchback stationary jam When the paper has not passed through the switchback paper sensor (PS22) in the specified time after the duplexing pick-up process has begun, the CPU assesses that a switchback unit stationary jam has occurred. (Unit: Seconds) PRINT PRINT (Unit: Seconds) DUPLEX DEFLECTOR SOLENOID DRIVE signal (/DUPSLD) Jam check Switchback sensor (PS22) Switchback motor (SMT21) T1 Normal Backward Forward T1: About 3.7 seconds (A4), About 5.8 seconds (Ledger) T1 Abnormal Figure 2-9-7 3. Duplex feed unit delay jam When the paper has not reached the duplexing unit paper sensor (PS21) after leaving the switchback paper sensor (PS22) in the specified time, the CPU assesses that a duplex feed unit delay jam has occurred. (Unit: Seconds) PRINT PRINT (Unit: Seconds) Switchback sensor (PS22) Jam check T2 Duplexing unit paper sensor (PS21) Switchback motor (SMT21) Backward Normal Forward T2: About 2.4 seconds (A4), About 3.2 seconds (Ledger) Figure 2-9-8 T2 Abnormal Backward Forward 2 - 80