• Code: E023-0402
• Description: Developing stirring motor (Bk) error. Lock signal of Developing stirring motor (Bk) (M29) cannot be detected for the specified period of time after first detection • Connector disconnected, breaking (shorting) • Failure of the developing assembly (Sleeve overloaded) • Failure of the DC controller PCB • Contact failure of the drawer connector • Failure of the developing stirring motor
• Remedy: 1. Check the connection between the developing stirring motor (Bk) and the DC controller PCB. (Connection of the connector, Breaking (shorting)) Motor side: J7152, J8038 PCB side: J1243 2. Replace the developing assembly (Bk). 3. Replace the DC controller interface PCB. 4. Check the contact of the drawer connector (J8031). 5. Replace the developing stirring motor (Bk).

• Code: E025-0102
• Description: Block supply timeout (Y) error. The toner supply screw rotation sensor cannot detect rotation of the screw.
• Remedy: 1. Check the connection between the hopper/stirring supply motor (M9) and the DC controller PCB. Motor side: J7104, J8106 PCB side: J1247 2. Check the connection between the toner feed screw rotation sensor (PS12) and the DC controller PCB. Sensor side: J7418, J8106 PCB side: J1247 3. Replace the hopper/stirring supply motor. 4. Clean and replace the toner feed screw rotation sensor. 5. Replace the toner supply pipe unit. 6. Replace the hopper unit. CAUTION: Remedies 5 and 6 are taken when the motor is overloaded due to toner adhesion in the unit or gear interlocking failure, etc. Since it is difficult to identify the cause, it is recommended to replace the unit.

• Code: E025-0110
• Description: Toner container sealing/release holder shift cam HP sensor timeout (Y) error. HP sensor of release holder shift cam cannot detect within specified period of time.
• Remedy: 1. Check the connection of the toner container drive motor (M10) harness. (Check whether the wire is not caught by parts.) Check the connection with the DC controller PCB. Motor side: J7100 PCB side: J1247 2. Check the connection between the release holder shift cam HP sensor (PS8) and the DC controller PCB. Sensor side: J7135, J8040 PCB side: J1248 3. Replace the toner container drive motor. 4. Clean and replace the release holder shift cam HP sensor. 5. Replace the hopper unit. CAUTION: As for Remedy 5, since it is difficult to identify the cause, it is recommended to replace the unit. NOTE: After performing the above remedy work, go through the following to clear the error: COPIER> FUNCTION> CLEAR> ERR

• Code: E025-0120
• Description: Toner container/toner container inserting inlet phase (Y) error. When the power was turned on, it was detected that the toner container cap was opened (the release holder shift cam phase sensor was protected against light) AND the toner container inserting inlet cover was opened (the toner container inserting inlet cover open/close sensor was transmissive).
• Remedy: 1. Close the toner container inserting inlet cover and turn OFF/ON the power. 2. Check the connection between the toner container inserting inlet cover open/close sensor (PS10) and the DC controller PCB. (Connection of the connector, Breaking, Wire caught by parts) Sensor side: J7122, PCB side: J2146 3. Check the connection between the release holder shift cam phase sensor (PS81) and the DC controller PCB. (Connection of the connector, Breaking, Wire caught by parts) Sensor side: J7123,J8106, PCB side: J1247 4. Replace the toner container inserting inlet cover open/ close sensor

• Code: E025-01A0
• Description: Error in Y Toner Container Reciprocation HP Sensor (PS11). Unable to detect the change in the Release Holder Shift Cam HP Sensor status (ON -> OFF) when opening the cap so that open and close status of the cap cannot be judged.
• Remedy: Identify the cause of the error whether it is due to mechanical problem to open/close the cap or problem at the Release Holder Shift Cam HP Sensor side. 1. Check if the Release Holder Shift Cam HP Sensor is soiled and the installation of the sensor. 2. Drive the Hopper Unit a little with the Toner Container Removing Tool, and check the service mode (COPIER> I/O> DC-CON> P052 bit15) to see that the output value of the sensor is changed. Since it is difficult to check the screen while driving it, repeat the operation to drive it a little and check the screen until the value is changed. If it is normal, the output value of the sensor is changed when opening/closing the cap. Even if it is normal, be sure to perform step 4 and later steps. 2-1. If there is an error in drive of the Hopper Unit, check the drive system such as gears. If it is damaged, replace the Set-on Drive Unit and then perform step 4 and later steps. 2-2. When the output value of the sensor is not changed although the Hopper Unit is driven, check the Sensor Harness (to see if the harness is caught, disconnected or physically removed). If there is no problem, replace the sensor. After checking the output value in step 2, perform step 4 and later steps. 3. If the problem is not solved by replacing the foregoing parts, replace the DC controller PCB and then perform step 4 and later steps. 4. Clear the error in service mode (COPIER> FUNCTION> CLEAR> ERR), and then turn OFF and then ON the main power. 5. Replace the toner (reinstall the removed Toner Container) at least once in user mode (Adjustment/ Maintenance> Replace Specified Toner), and check that toner replacement can be performed normally.

• Code: E025-01B0
• Description: Error in Y Toner Container Reciprocation HP Sensor (PS11). Unable to detect the change in the Release Holder Shift Cam HP Sensor status (OFF -> ON) when closing the cap so that open and close status of the cap cannot be judged.
• Remedy: Identify the cause of the error whether it is due to mechanical problem to open/close the cap or problem at the Release Holder Shift Cam HP Sensor side. 1. Check if the Release Holder Shift Cam HP Sensor is soiled and the installation of the sensor. 2. Drive the Hopper Unit a little with the Toner Container Removing Tool, and check the service mode (COPIER> I/O> DC-CON> P052 bit15) to see that the output value of the sensor is changed. Since it is difficult to check the screen while driving it, repeat the operation to drive it a little and check the screen until the value is changed. If it is normal, the output value of the sensor is changed when opening/closing the cap. Even if it is normal, be sure to perform step 4 and later steps. 2-1. If there is an error in drive of the Hopper Unit, check the drive system such as gears. If it is damaged, replace the Set-on Drive Unit and then perform step 4 and later steps. 2-2. When the output value of the sensor is not changed although the Hopper Unit is driven, check the Sensor Harness (to see if the harness is caught, disconnected or physically removed). If there is no problem, replace the sensor. After checking the output value in step 2, perform step 4 and later steps. 3. If the problem is not solved by replacing the foregoing parts, replace the DC controller PCB and then perform step 4 and later steps. 4. Clear the error in service mode (COPIER> FUNCTION> CLEAR> ERR), and then turn OFF and then ON the main power. 5. Replace the toner (reinstall the removed Toner Container) at least once in user mode (Adjustment/ Maintenance> Replace Specified Toner), and check that toner replacement can be performed normally.

• Code: E025-01C0
• Description: Error in Y Toner Insertion Inlet Cover Sensor (PS10). Unable to detect opening of the Toner Insertion Inlet Cover when removing the Toner Container
• Remedy: Identify the cause of the error whether it is due to link mechanism to open the Toner Insertion Inlet Cover or problem at the Toner Insertion Inlet Cover Sensor side. 1. Perform the user mode (Adjustment/Maintenance> Replace Specified Toner) to check if the Toner Insertion Inlet Cover opens normally (damage, slide of shaft area, etc.). 2. Check if the Toner Insertion Inlet Cover Sensor is soiled and the installation of the sensor. 3. Check the service mode (COPIER> I/O> DC-CON> P051 bit0) to see that the output value of the Toner Insertion Inlet Cover Sensor is changed normally when opening/closing the Toner Insertion Inlet Cover. If it is normal, the value becomes 0 by driving the Hopper Unit with the Toner Container Removing Tool and opening the Toner Insertion Inlet Cover. When closing the Toner Insertion Inlet Cover by hand, it becomes 1. 3-1. When the Toner Insertion Inlet Cover is not opened although the Hopper Unit is driven, check the drive system from upstream (Hopper Unit -> link mechanism of Hopper Tray -> Toner Insertion Inlet Cover Unit). If it is damaged, replace the damaged part and then perform step 5 and later steps. 3-2. When the output value is not changed normally although the Toner Insertion Inlet Cover can be opened/closed, check the Sensor Harness (to see if the harness is caught, disconnected or physically removed, *including the Relay Connector). If there is no problem, replace the sensor. After checking the output value in step 3, perform step 5 and later steps. 4. If the problem is not solved by replacing the foregoing parts, replace the DC controller PCB and then perform step 5 and later steps. 5. Clear the error in service mode (COPIER> FUNCTION> CLEAR> ERR), and then turn OFF and then ON the main power. 6. Replace the toner (reinstall the removed Toner Container) at least once in user mode (Adjustment/ Maintenance> Replace Specified Toner), and check that toner replacement can be performed normally.

• Code: E025-0202
• Description: Block supply timeout (M) error. The toner supply screw rotation sensor cannot detect rotation of the screw.
• Remedy: 1. Check the connection between the hopper/stirring supply motor (M12) and the DC controller PCB. Motor side: J7105, J8107 PCB side: J1247 2. Check the connection between the toner feed screw rotation sensor (PS15) and the hopper driver PCB. Sensor side: J7419, J8107 PCB side: J1247 3. Replace the hopper/stirring supply motor. 4. Clean and replace the toner feed screw rotation sensor. 5. Replace the toner supply pipe unit. 6. Replace the hopper unit. CAUTION: Remedies 5 and 6 are taken when the motor is overloaded due to toner adhesion in the unit or gear interlocking failure, etc. Since it is difficult to identify the cause, it is recommended to replace the unit.