• Code: C43
• Description: Thermistor abnormality during warming up or in readystatus after abnormality judgment
• Remedy: Check Item: Check the thermistors • Check if the connectors are disconnected. • Check if the center, side and edge thermistors are in contact with the surface of the fuser roller properly. • Check if the harnesses of the center, side and edge thermistors are open circuited. Check the heater • Check if the heater is broken. • Check if the connector of the heater is disconnected. • Check if the thermostat is blown. Check the MAIN board • Check if the connectors CN17 are disconnected. • Check if the conductor pattern on the MAIN board is short circuited or open circuited. • Replace the MAIN board. Check the switching regulator • Check if the connectors CN108 are disconnected. Clear the status counter After repairing the matter which caused the error [C43], perform the following: 1. Turn ON the power while [0] and [8] are pressed simultaneously. 2. Key in “400”, then press [ENTER]. 3. Change the current status counter value “4” to “0”, then press [ENTER] (to cancel [C43]). 4. Turn the power OFF and then back ON. Make sure that the equipment enters the normal ready state.
  Parts to be replaced: MAIN board Switching regulator

• Code: C44
• Description: Heater abnormality after abnormality judgment: Thetemperature of the fuser roller has exceeded the range of control (in this case, the main switch turns OFF automatically) or does not even reach the range.
• Remedy: Check Item: Check the thermistors • Check if the connectors are disconnected. • Check if the center, side and edge thermistors are in contact with the surface of the fuser roller properly. • Check if the harnesses of the center, side and edge thermistors are open circuited. Check the heater • Check if the heater is broken. • Check if the connector of the heater is disconnected. • Check if the thermostat is blown. Check the MAIN board • Check if the connectors CN17 are disconnected. • Check if the conductor pattern on the MAIN board is short circuited or open circuited. • Replace the MAIN board. Check the switching regulator • Check if the connectors CN108 are disconnected. Clear the status counter Change the current status counter value (08-400) “5”, “7” or “9” to “0” for [C44], taking the same procedure as that for [C41]. * The status counter value is as follows in the following cases. Change them to “0” respectively. • The error occurred during warming-up: “5” • The error occurred after the equipment has become ready: “7” • The temperature detected by the center thermistor is 230°C or higher: “9” • The temperature detected by the side thermistor is 230°C or higher: “9” • The temperature detected by the edge thermistor is 230°C or higher: “9” only during printing.
  Parts to be replaced: MAIN board Switching regulator

• Code: C45
• Description: Thermistor abnormality during printing: Abnormality of thethermistor is detected during printing.
• Remedy: Check Item: Check the thermistors • Check if the connector is disconnected. • Check if the edge thermistor is in contact with the surface of the fuser roller properly. • Check if the harness of the edge thermistor is open circuited. Check the MAIN board • Check if the connectors CN17 are disconnected. • Check if the conductor pattern on the MAIN board is short circuited or open circuited. • Replace the MAIN board. Clear the status counter Change the current status counter value (08-400) “6” to “0”.
  Parts to be replaced: MAIN board Switching regulator

• Code: C55
• Description: ADF I/F error: Communication error has occurredbetween the ADF and the scanner
• Remedy: Check the connection. 1. Check if the connector CN71 on the ADF/RADF board is disconnected. 2. Check if the relay connector between the ADF/RADF board and the PFC board is disconnected. 3. Check if the connector CN246 on the PFC board is disconnected. 4. Check if the connector pins are disconnected and the harnesses are open circuited. 5. Check if the conductor patterns on the ADF/RADF board and the MAIN board are short circuited or open circuited. 6. Replace the ADF/RADF board. 7. Replace the MAIN board.

• Code: C56
• Description: PFC board I/F error: Communication error has occurredbetween the PFC board and the equipment.
• Remedy: Check the connection. 1. Check if the connector CN113 on the MAIN board is disconnected. 2. Check if the connector CN112 on the switching regulator is disconnected. 3. Check if any of the connectors CN241 and CN242 on the PFC board is disconnected. 4. Check if the relay connector between the ADU board and the PFC board is disconnected. 5. Check if the connector pins are disconnected and the harnesses are open circuited. 6. Check if the conductor patterns on the PFC board and the MAIN board are short circuited or open circuited. 7. Replace the PFC board. 8. Replace the MAIN board.

• Code: C94
• Description: Firmware update error: An error message appears wheneither of the following Main PC boards is installed to e- STUDIO185/225/245.- The Main PC board for e-STUDIO182- The Main PC board for e-STUDIO165/167/205/207/237
• Remedy: Check the MAIN board. A C94 error message appears when either of the following Main PC boards is installed to e-STUDIO195/225/245. • The Main PC board for e-STUDIO182. • The Main PC board for e-STUDIO165/167/205/207/237.

• Code: C97
• Description: High-voltage transformer abnormality: Leakage of themain charger is detected.
• Remedy: Check the High-voltage transformer. 1. Is the main charger installed securely? 2. Check if the spring of high-voltage supply contact point is deformed. 3. Check if the needle electrode is broken or the main charger grid is deformed. 4. Check if any foreign matters is on the needle electrode or the main charger grid. 5. Is the transfer/separation charger installed securely? 6. Check if the transfer/separation charger wire is broken or unhooked. 7. Check if any foreign matter is on the transfer/separation charger wire.

• Code: C99
• Description: PFC microcomputer abnormality
• Remedy: Check the PFC board. 1. Check if the error still occurs when the power is turned OFF and then back ON. 2. Check if the conductor patterns on the PFC board are short circuited or open circuited. 3. Replace the PFC board.