• Code: C4-00
• Description: PTC High-voltage output trouble
• Causes: (1) Abnormality of PTC unit (2) Imperfection insertion of PTC unit (3) PTC unit not inserted (4) Disconnection, abnormality of PTC unit. (Transformer B801 of the high-voltage TC PWB) (5) High voltage TC PWB trouble (6) PCU PWB trouble
• Remedy: (1)Remove and insert PTC unit./Replace. (2) Remove and insert PTC unit. (3) Insert PTC unit. (4) Insert PCT harness. /Replace. (Transformer B801 of the high-voltage TC PWB) (5) Replace the high voltage TC PWB. (6 Replace PCU PWB.

• Code: C4-05
• Description: High-voltage MC Black circuit trouble
• Causes: 1) Pin getting away of a harness (PTC-ERR) and breaking (TC PWB Input connector CN1-4pin) 2) High-voltage error circuit (PTC-ERR) damage
• Remedy: 1) Check connection of the harness.(TC PWB Input connector CN1-4pin) Replace the harness. 2) Check disconnection of the high voltage TC PWB connector./Replace

• Code: C4-20
• Description: 1st transfer High-voltage output trouble
• Causes: Open circuit of the 1st transfer out put.
• Remedy: 1) Check & Remedy Use SIM8-6 to check the out put of [1TC-K/C/M/Y].If the leakage noise or the flickering on the screen of the panel is detected; (1) Abnormality of 1ST transfer unit. --> Remove and insert the 1ST transfer unit. --> Replace the 1ST transfer unit. (2) Imperfect insertion the 1ST transfer unit. --> Remove and insert the 1ST transfer unit. (3) Abnormality of the 1TC-K/C/M/Y harness. --> Check 1TC-K/C/M/Y wiring.Replace. (4) Abnormality of the high voltage TC PWB spring contact. --> Check the high voltage TC PWB spring contact. (5) High TC PWB trouble. --> Replace the high TC PWB. (6) PCU PWB trouble. --> Replace the PCU PWB. 2) Check & Remedy Check the operation of the 1ST transfer separation clutch1/2(1TURC_1,1TURC_2). If the clutch or gera do not move smoothly or have noise, (1) Abnormality of 1ST transfer separation clutch. --> Check connection of harness and check the clutch. --> Replace the clutch. (2) Abnormality of 1ST transfer unit. --> Check the 1ST transfer unit. --> Replace the 1ST transfer unit. 3) Check & Remedy Check the operation of OPC Drum. If it is not normal movement, (1) Abnormality of Drum drive motor (DVM_K.DVM_CL). --> Check Drum drive motor (DVM_K,DVM_CL). (2) Abnormality of OPC Drum (K/C/M/Y). --> Check OPC Drum (K/C/M/Y). --> Replace OPC Drum (K/C/M/Y).

• Code: C4-20
• Description: 1st transfer High-voltage output trouble
• Causes: Open circuit of the 1st transfer out put.
• Remedy: 1) Check & Remedy Use SIM8-6 to check the out put of [1TC-K/C/M/Y].If the leakage noise or the flickering on the screen of the panel is detected; (1) Abnormality of 1ST transfer unit. --> Remove and insert the 1ST transfer unit. --> Replace the 1ST transfer unit. (2) Imperfect insertion the 1ST transfer unit. --> Remove and insert the 1ST transfer unit. (3) Abnormality of the 1TC-K/C/M/Y harness. --> Check 1TC-K/C/M/Y wiring.Replace. (4) Abnormality of the high voltage TC PWB spring contact. --> Check the high voltage TC PWB spring contact. (5) High TC PWB trouble. --> Replace the high TC PWB. (6) PCU PWB trouble. --> Replace the PCU PWB. 2) Check & Remedy Check the operation of the 1ST transfer separation clutch1/2(1TURC_1,1TURC_2). If the clutch or gera do not move smoothly or have noise, (1) Abnormality of 1ST transfer separation clutch. --> Check connection of harness and check the clutch. --> Replace the clutch. (2) Abnormality of 1ST transfer unit. --> Check the 1ST transfer unit. --> Replace the 1ST transfer unit. 3) Check & Remedy Check the operation of OPC Drum. If it is not normal movement, (1) Abnormality of Drum drive motor (DVM_K.DVM_CL). --> Check Drum drive motor (DVM_K,DVM_CL). (2) Abnormality of OPC Drum (K/C/M/Y). --> Check OPC Drum (K/C/M/Y). --> Replace OPC Drum (K/C/M/Y).

• Code: C4-25
• Description: High-voltage 1TC circuit trouble
• Causes: 1) Pin getting away of a harness (1TC-ERR) and breaking (TC PWB Input connector CN1-2pin) 2) High-voltage error circuit (1TC-ERR) damage
• Remedy: 1) Check connection of the harness.(1TC PWB Input connector CN1-2pin) Replace the harness. 2) Check disconnection of the high voltage TC PWB connector./Replace.

• Code: C4-25
• Description: High-voltage 1TC circuit trouble
• Causes: 1) Pin getting away of a harness (1TC-ERR) and breaking (TC PWB Input connector CN1-2pin) 2) High-voltage error circuit (1TC-ERR) damage
• Remedy: 1) Check connection of the harness.(1TC PWB Input connector CN1-2pin) Replace the harness. 2) Check disconnection of the high voltage TC PWB connector./Replace.

• Code: C4-30
• Description: 2nd transfer High-voltage output trouble (open)
• Causes: Open circuit of the 2nd transfer out put.
• Remedy: 1) Check & Remedy Use SIM8-6 to check the out put of [2TC]. If the leakage noise or the flickering on the screen of the panel is detected; (1) Abnormality of 1ST transfer unit. --> Remove and insert the 1ST transfer unit. --> Replace the 1ST transfer unit. (2) Imperfect insertion the 1ST transfer unit. --> Remove and insert the 1ST transfer unit. (3) Abnormality of 2nd transfer unit. --> Remove and insert the 2nd transfer unit. --> Replace the 2ST transfer unit. (4) Imperfect insertion the 2nd transfer unit. --> Remove and insert the 2nd transfer unit. (5) Abnormality of the 2nd TC harness. (Transformer B501 of the high-voltage TC PWB) --> Check 2nd TC harness wiring.Replace. (6) High voltage TC PWB trouble. --> Replace the high voltage TC PWB. (7) PCU PWB trouble. --> Replace the PCU PWB. 2) Check & Remedy Check the operation of the 2nd transfer separation clutch (2TCRC). If the clutch or gera do not move smoothly or have noise, (1) Abnormality of 2nd transfer separation clutch. --> Check connection of harness and check the clutch. --> Replace the clutch. (2) Abnormality of 2nd transfer unit. --> Check the 2nd transfer unit. --> Replace the 2nd transfer unit.

• Code: C4-31
• Description: 2nd transfer High-voltage output trouble (short)
• Causes: 1) Abnormality of 1ST transfer unit. 2) Imperfect insertion the 1ST transfer unit. 3) High voltage TC PWB trouble.
• Remedy: Use SIM8-6 to check the out put of [2TC]. 1) Check the 1ST transfer unit. Replace the 1ST transfer unit. 2) Remove and insert the 1ST transfer unit. 3) Replace the high TC PWB.