Figure 37. Paper path for the duplexer Jams The following paper sensors are installed to detect whether or not the print media is present and whether or not it is fed normally. ! Tray 2 paper sensor (PS101) ! Prefeed sensor (PS102) ! Top-of-page sensor (PS103) ! Face-down tray paper-full sensor (PS104) ! Tray 1 (multi-purpose tray) paper sensor (PS105) ! Paper width sensor (PS106) ! Fuser delivery sensor 1 (PS108) ! Fuser delivery sensor 2 (PS107) The microprocessor (CPU) on the engine controller board detects a jam by checking for media presence in the sensor unit at the check timing stored in the memory.
If the CPU detects that a jam has occurred, it stops print operation and signals the formatter. 128 Theory of operation EN