• Code: C81
• Description: Transport motor trouble
• Remedy: [Procedure 1] Is the No.2 transport motor (M8) operating in reverse at the fixed timing? No Replace the transport motor or finisher controller board. Yes Is the shutter correctly coupled to the shutter upper/lower bars? No Correctly couple. Yes Try turning transport roller 2 in reverse by hand. Do the shutter upper/lower bars move up and down? No Correct the mechanism from the shutter upper/lower bars up to the gears of transport roller 2. Yes Is the shutter close detection switch (MS4) normal? No Replace the switch. Yes Replace the finisher controller board. [Procedure 2] Is the No.2 transport motor (M8) operating in reverse at the fixed timing? No Replace the transport motor or finisher controller board. Yes Is the shutter correctly coupled to the shutter upper/lower bars? No Correctly couple. Yes Try turning transport roller 2 in reverse by hand. Do the shutter upper/lower bars move up and down? No Correct the mechanism from the shutter upper/lower bars up to the gears of transport roller 2. Yes Is the shutter open sensor (PI5) normal? No Replace the sensor. Yes Replace the finisher controller board.

• Code: C92
• Description: Power supply trouble interrupt trouble
• Remedy: (1) Check the power supply for abnormal voltage fluctuations in the operating environment. (2) Replace the power supply.

• Code: C93
• Description: ADF original stop signal not received
• Remedy: (1) Check the harness between the ADF control PC board and the scanner control PC board for disconnections and breaks. (2) Check mainly the IC2,IC3,IC14,CN1 on the ADF control PC board for disconnections and short-circuits. (3) Check mainly the IC1,IC7, J8 on the scanner control PC board for disconnections and shortcircuits. (4) Check whether the ADF aligning sensor and the ADF timing sensor are detecting normally or not. (5) Replace the ADF control PC board. (6) Replace the scanner control PC board.

• Code: C94
• Description: M-CPU is abnormal
• Remedy: Is the service call output even after the power switch on the main unit is turned OFF then ON again? No Leave as it is and see what happens. Yes • Check the circuit pattern between MCPU (IC32) and MROM (IC31) for breaks and shortcircuits. • Replace the LGC board if this trouble occurs frequently.

• Code: C99
• Description: PFC microcomputer is abnormal
• Remedy: Is the service call output even after the power switch on the main unit is turned OFF then ON again? No Leave as it is and see what happens. Yes • Check the circuit pattern around the PFC microcomputer (IC21) for breaks and short-circuits. • Replace the PFC microcomputer or LGC board if this trouble occurs frequently.

• Code: CA1
• Description: Polygonal mirror motor is abnormal
• Remedy: Is the polygon motor rotating? No • Check connector J206 on the PLG board for disconnection. • Check connector CN1 on the POL board for disconnection. • Check the harness for breaks and the connector pins for disconnection. • Check the patterns on the PLG and POL boards for breaks and shortcircuits. • Replace the POL board. • Replace the PLG board. Yes Are pins 2 and 3 of connector CN1 on the POL board Low at all times? No • Check the patterns on the PLG and POL boards for breaks and shortcircuits. • Replace the POL board. • Replace the PLG board. Yes • Check the pattern on the PLG board for breaks and short-circuits. • Replace the PLG board.

• Code: CA2
• Description: H-SYNC is abnormal
• Remedy: Is the harness between the PLG board and the HSYNC board for breaks and the connectors for disconnection? Yes Replace the harness, and re-connect the connector. No • Replace the PLG board. • Replace the unit.

• Code: CA3
• Description: Secondary scanning rough adjustment error
• Remedy: Are the harness(es) between the PLG board and the galvanomirror, PLG board and laser drive board, and PLG board and HSYNC board broken, and connector(s) disconnected? Yes Replace the harness(es), and re-connect the connector(s). No • Replace the PLG board. • Replace the unit.