• Code: C94
• Description: LGC-CPU abnormal
• Remedy: Is "Call for service" displayed again even after the copier is turned OFF and then back ON? N: Observe the condition for a while. Y: 1. Check if the conductor pattern between LGC-CPU (IC32) and FROM (IC24) is open- or short-circuited. 2. If this problem recurs frequently, replace the LGC board.

• Code: C9A
• Description: Main memory abnormal
• Remedy: Is "Call for service" displayed again even after the copier is turned OFF and then back ON? N: Observe the condition for a while. Y: 1. Check if the conductor pattern between the LGC-CPU (IC32), FROM (IC24), SRAM (IC35) and BC-RAM (IC36) is open- or short-circuited. 2. If this problem recurs frequently, replace the LGC board.

• Code: C9B
• Description: LGC-CPU protocol abnormal
• Remedy: Turn the power OFF, and back ON. In case that these errors occur frequently, confirm the contents of the following items in the setting mode and report them. 08-267 C9B/C9D error history display 08-900 Firmware version (Basic section ROM) 08-902 Engine ROM version (LGC) 08-903 Printer ROM version (IMC)

• Code: C9D
• Description: IMC-CPU protocol abnormal
• Remedy: Turn the power OFF, and back ON. In case that these errors occur frequently, confirm the contents of the following items in the setting mode and report them. 08-267 C9B/C9D error history display 08-900 Firmware version (Basic section ROM) 08-902 Engine ROM version (LGC) 08-903 Printer ROM version (IMC)

• Code: C9E
• Description: IMC board connection abnormal
• Remedy: Is "Call for service" displayed again even after the copier is turned OFF and then back ON? N: Observe the condition for a while. Y: 1. Check if the IMC board, SYS board and the IMG board are firmly connected to the MTH1 board. 2. Check if the connector J181, J182, J185 or J188 on the IMC board is disconnected. 3. Check if the connector J161 on the IMG board is disconnected. 4. Check if the connector J1 on the SCM board is disconnected. 5. Check if the harness connected to the IMC board is open- or short-circuited or if any connector pin is disconnected. 6. Check if the harness between the SCM and IMG boards is open-circuited or if any connector pin is disconnected. 7. If this problem recurs frequently, replace the IMC board.

• Code: CA1
• Description: Polygonal motor rotation abnormal
• Remedy: Is the polygonal motor rotating? N: 1. Check if the polygonal motor connector is disconnected. 2. Check if connector J181 or J188 on the IMC board is disconnected. 3. Check if any harness is open-circuited or any connector pin is disconnected. 4. Check if any conductor pattern on the IMC board is open- or short-circuited. 5. Replace the IMC board. 6. Replace the laser optical unit. Y: Are both 10th and 12th pins of the connector J188 on the IMC board always at the level "L"? N: 1. Check if any conductor pattern on the IMC board is open- or short-circuited . 2. Replace the IMC board. 3. Replace the laser optical unit. Y: 1. Check if any conductor pattern on the IMC board is open- or short-circuited . 2. Replace the IMC board. 3. Replace the laser optical unit.

• Code: CA2
• Description: H-SYNC abnormal
• Remedy: Is the polygonal motor rotating? N: Refer to "[CA1] Polygonal motor rotation abnormal". Y: Are both 10th and 12th pins of the connector J188 on the IMC board always at the level "L"? N: Refer to "[CA1] Polygonal motor rotation abnormal". Y: Is the harness between the RLY and IMC boards open-circuited? Are the connector J185 on the IMC board or the connector J201 on the RLY board disconnected? Y: Replace the harness. Reconnect the connectors. N: 1. Replace the IMC board. 2. Replace the laser optical unit.

• Code: CB1
• Description: Feed motor abnormal
• Remedy: [Procedure 1] Is the second feed motor (M8) rotating in reverse at the specified timing? N: Replace the second feed motor or the finisher controller PC board. Y: Is the shutter securely attached to the shutter upper/lower bars? N: Attach it securely. Y: Turn the feed roller-2 in reverse by hand. Do the shutter upper/lower bars move up and down? N: Correct the mechanism from the shutter upper/lower bars to the gears of the feed roller-2. Y: Is the shutter closed detecting switch (MS4) working normally? N: Replace the switch. Y: Replace the finisher controller PC board.
  [Procedure 2] Is the second feed motor (M8) rotating in reverse at the specified timing? N: Replace the second feed motor or the finisher controller PC board. Y: Is the shutter securely attached to the shutter upper/lower bars? N: Attach it securely. Y: Turn the feed roller-2 in reverse by hand. Do the shutter upper/lower bars move up and down? N: Correct the mechanism from the shutter upper/lower bars to the gears of the feed roller-2. Y: Is the shutter open sensor (PI5) working normally? N: Replace the sensor. Y: Replace the finisher controller PC board.
  [Procedure 3] Check the safety zone switch (MS3). Is the switch working normally? N: Replace the switch. Y: Is the safety zone switch (MS3) correctly pressed? N: Correct the mechanism. Y: Is the shutter closed detecting switch (MS4) working normally? N: Replace the switch. Y: Is the shutter closed detecting switch (MS4) correctly pressed? N: Correct the mechanism. Y: Replace the finisher controller PC board.