Fixing Kyocera KM1525 Printer Error Codes in details

– Printer model: Kyocera KM1525
– Fix Error codes on Kyocera KM1525 model and its description:

Code: C011
Description: Backup memory data problem
• Data in the specified area of the backup memory does not match the specified values.
Causes: Defective main PCB.
Remedy: Replace the main PCB and check for correct operation.

Code: C100
Description: Exposure lamp problem
• Check the CCD input value for the lighting status of the exposure lamp 100 ms after the exposure lamp is lit and the carriage is moved to the shading position. If the exposure lamp does not light, turn off the lamp. After 500 ms, light the lamp again and, a further 500 ms later, check the CCD input. The exposure lamp does not light after 5 retries.
Causes: Poor contact of the connector terminals. Defective exposure lamp. Defective main PCB. Incorrect shading position. CCD PCB output problem.
Remedy: Check the connection of connectors CN24, CN23, CN22 and CN3 on the main PCB, and the continuity across the connector terminals. Repair or replace if necessary. Replace the exposure lamp or inverter PCB. Replace the main PCB and check for correct operation. Adjust the position of the contact glass (shading plate). If the problem still occurs, replace the scanner home position switch. Replace the ISU.

Code: C104
Description: Optical system problem
• After AGC, correct input is not obtained at CCD.
Causes: Poor contact of the connector terminals.CCD PCB output problem. Defective main PCB.
Remedy: Check the connection of connectors CN23, CN22 and CN3 on the main PCB, and the continuity across the connector terminals. Repair or replace if necessary. Replace the ISU. Replace the main PCB and check for correct operation.

Code: C200
Description: Drive motor problem
• LOCK ALM signal remains high for 1 s, 1 s after the drive motor has turned on.
Causes: Poor contact of the drive motor connector terminals. Defective drive motor rotation control circuit. Defective drive transmission system.
Remedy: Reinsert the connector. Also check for continuity within the connector cable. If none, repair or replace the cable. Replace the drive motor. Check if the rollers and gears rotate smoothly. If not, grease the bushings and gears. Check for broken gears and replace if any.

Code: C310
Description: Scanner carriage problem
• The home position is not correct when the power is turned on or at the start of copying using the contact glass.
Causes: Poor contact of the connector terminals. Defective scanner home position switch. Defective main PCB. Defective scanner motor.
Remedy: Check the connection of connectors CN28 and CN25 on the main PCB and the continuity across the connector terminals. Remedy or replace if necessary. Replace the scanner home position switch. Replace the main PCB and check for correct operation. Replace the scanner motor.

Code: C400
Description: Polygon motor synchronization problem
• The polygon motor does not reach a stable speed within 19 s of the polygon motor remote signal turning on.
Causes: Poor contact of the polygon motor connector terminals.
Remedy: Reinsert the connector. Also check for continuity within the connector cable. If none, repair or replace the cable.

Code: C401
Description: Polygon motor steady-state problem
• The polygon motor rotation is not stable for 400 ms after the polygon motor rotation has been stabilized.
Causes: Poor contact of the polygon motor connector terminals. Defective power source PCB.
Remedy: Reinsert the connector. Also check for continuity within the connector cable. If none, repair or replace the cable. Check if 24 V DC is present at CN3-1 and CN3-2 on the power source PCB. If not, replace the power source PCB.

Code: C420
Description: BD steady-state problem
• The VTC detects a BD error for 800 ms after the polygon motor rotation has been stabilizad.
Causes: Defective power source PCB. Poor contact of the laser scanner unit connector terminals.
Remedy: Reinsert the connector. Also check for continuity within the connector cable. If none, repair or replace the cable. Replace the LSU. Replace the main PCB and check for correct operation.

Code: C510
Description: Main charger problem
• MC ALM signal is detected continuously for 800 ms when MC REM signal is turned on.
Causes: Defective LSU. Defective main PCB. Poor contact of the high-voltage transformer PCB connector terminals. Defective high-voltage transformer PCB. Leakage during main charging. Deformed high-voltage transformer PCB terminal spring.
Remedy: Reinsert the connector. Also check for continuity within the connector cable. If none, repair or replace the cable. Replace the high-voltage transformer PCB. Check and clean the main charger assembly. Replace the spring.

Code: C610
Description: Broken fixing heater wire
• Warm-up does not end within 90 s.
• The secondary stabilization fixing temperature drops to 100°C/212°F or below.
• The fixing temperature remains below 40˚C/104˚F for 7 s or longer after the fixing heaters have been turned on.
Causes: Fixing heater installed incorrectly. Broken fixing heater wire. Poor contact in the fixing unit thermistor connector terminals. Broken fixing unit thermistor wire. Fixing unit thermistor installed incorrectly. Fixing unit thermostat triggered.
Remedy: Check and reinstall if necessary. Check for continuity. If none, replace fixing heater. Check the connection of connector CN12 on the main PCB and the continuity across the connector terminals. Remedy or replace if necessary. Measure the resistance. If it is ∞Ω, replace the fixing unit thermistor. Check and reinstall if necessary. Check for continuity. If none, replace the fixing unit thermostat. Check the operation of the cooling fan and repair if necessary.

Code: C620
Description: Abnormally low fixing unit thermistor temperature
• The fixing temperature remains below 100˚C/212˚F for 10 s during copying.
Causes: Fixing heater installed incorrectly. Broken fixing heater wire. Poor contact in the fixing unit thermistor connector terminals. Broken fixing unit thermistor wire. Fixing unit thermistor installed incorrectly. Fixing unit thermostat triggered.
Remedy: Check and reinstall if necessary. Check for continuity. If none, replace fixing heater. Check the connection of connector CN12 on the main PCB and the continuity across the connector terminals. Remedy or replace if necessary. Measure the resistance. If it is ∞Ω, replace the fixing unit thermistor. Check and reinstall if necessary. Check for continuity. If none, replace the fixing unit thermostat. Check the operation of the cooling fan and repair if necessary.

Code: C630
Description: Abnormally high fixing unit thermistor temperature
• The fixing temperature exceeds 240˚C/464˚F for 10 s.
Causes: Shorted fixing unit thermistor. Broken fixing heater control circuit on the power source PCB.
Remedy: Measure the resistance. If it is 0 Ω, replace the fixing unit thermistor. Replace the power source PCB.

Code: C710
Description: Toner sensor problem
• The sensor output voltage is outside the range of 0.5 to 4.5 V during toner control.
• The toner sensor control voltage cannot be set within the setting range when maintenance item U130 is run.
Causes: Defective toner sensor. Poor contact of the toner sensor connector terminals. Developer problem.
Remedy: Replace the toner sensor. Reinsert the connector. Also check for continuity within the connector cable. If none, repair or replace the cable. Replace the developer.

Code: C730
Description: Broken external temperature thermistor wire
• The input voltage is above 4.5 V.
Causes: Poor contact of the humidity sensor PCB connector terminals. Defective external temperature thermistor.
Remedy: Reinsert the connector. Also check for continuity within the connector cable. If none, repair or replace the cable. Replace the humidity sensor PCB.

Code: C731
Description: Short-circuited external temperature thermistor
• The input voltage is below 0.5 V.
Causes: Poor contact of the humidity sensor PCB connector terminals. Defective external temperature thermistor.
Remedy: Reinsert the connector. Also check for continuity within the connector cable. If none, repair or replace the cable. Replace the humidity sensor PCB.

Code: C740
Description: Image formation unit connector insertion problem
• Absence of the image formation unit is detected continuously for 1500 ms while there is no error on the copier.
Causes: Image formation unit connector inserted incorrectly. Defective image formation unit connector.
Remedy: Reinsert the image formation unit connector if necessary. Replace the image formation unit.