• Code: 6050
• Description: Abnormally low fuser center thermistor 1 temperature
  Fuser center thermistor 1 detects a temperature lower than 100°C/212°F for 1 s after warming up, during ready or during print. The temperature of thermistor 1 is detected to be less than 70°C/158°F for more than one second during lowpower mode.
• Remedy: Power source: 1. Check that the operating voltage falls within +/-10%. 2. Check no voltage drop is caused. The heater is deactivated at 70V or lower. 3. Relocate the AC outlet that supplies power.
  Fuser unit: 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Fuser unit and Engine PWB (YC26) 2. If the wiring is disconnected, shorted or grounded, replace the wiring. 3. Replace the Fuser unit and execute U167 counter clear.
  Engine PWB: 1. Check the engine software and upgrade to the latest, if necessary. 2. Replace the engine PWB.
  Fuser IH PWB: 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Fuser IH PWB(YC4) and Engine PWB (YC26) 2. Replace the Fuser IH PWB.
  Fuser IH unit: 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Fuser IH unit and Fuser IH PWB (YC9 and 10) Fuser IH PWB( YC4) and Engine PWB (YC26) 2. If the wiring is disconnected, shorted or grounded, replace the wiring. 3. Replace the fuser IH unit.

• Code: 6120
• Description: Abnormally high fuser press thermistor 4 temperature
  Fuser press thermistor 4 detects a temperature higher than 190°C/374°F for 1 s.
• Remedy: Fuser unit: 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Fuser unit and Engine PWB (YC26) 2. If the wiring is disconnected, shorted or grounded, replace the wiring. 3. Replace the Fuser unit and execute U167 counter clear.
  Engine PWB: 1. Check the engine software and upgrade to the latest, if necessary. 2. Replace the engine PWB.

• Code: 6130
• Description: Broken fuser press thermistor 4 wire
  Input from fuser press thermistor 4 is 992 or more (A/D value) continuously for 60 s.
• Remedy: Fuser unit: 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Fuser unit and Engine PWB (YC26) Fuser IH PWB(YC4) 2. If the wiring is disconnected, shorted or grounded, replace the wiring. 3. Replace the Fuser unit and execute U167 counter clear.
  Engine PWB: 1. Check the engine software and upgrade to the latest, if necessary. 2. Replace the engine PWB.
  Fuser IH PWB: 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Fuser IH PWB(YC4) and Engine PWB (YC26) 2. Replace the fuser IH PWB.
  Fuser IH unit: 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Fuser IH unit and Fuser IH PWB (YC9 and 10) 2. If the wiring is disconnected, shorted or grounded, replace the wiring. 3. Replace the fuser IH unit.

• Code: 6150
• Description: Abnormally low fuser press thermistor 4 temperature Fuser press thermistor 4 detects a temperature lower than 30°C/86°F for 1 s after warming up.
• Remedy: Fuser unit: 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Fuser unit and Engine PWB (YC26) If the wiring is disconnected, shorted or grounded, replace the wiring. 2. Replace the Fuser unit and execute U167 counter clear.
  Engine PWB 1. Check the engine software and upgrade to the latest, if necessary. 2. Replace the engine PWB.
  Fuser IH PWB: 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Fuser IH PWB( YC4) and Engine PWB (YC26) 2. Replace the fuser IH PWB.
  Fuser IH unit: 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Fuser IH unit and Fuser IH PWB (YC9 and 10) 2. If the wiring is disconnected, shorted or grounded, replace the wiring. 3. Replace the fuser IH unit.

• Code: 6200
• Description: Broken fuser edge heater wire
  Fuser edge thermistor 2 does not reach 100° C/212 °F even after 60 s during warming up. The detected temperature of fuser edge thermistor 2 does not reach the specified temperature (ready indication temperature) for 420 s in warming up after reached to 100° C/212 °F.
• Remedy: Fuser unit: 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Fuser unit and Engine PWB (YC26) 2. If the wiring is disconnected, shorted or grounded, replace the wiring. 3. Replace the Fuser unit and execute U167 counter clear.
  Engine PWB: 1. Check the engine software and upgrade to the latest, if necessary. 2. Replace the engine PWB.
  Fuser IH PWB: 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Fuser IH PWB( YC4) and Engine PWB (YC26) 2. Replace the fuser IH PWB.
  Fuser IH unit: 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Fuser IH unit and Fuser IH PWB (YC9 and 10) 2. If the wiring is disconnected, shorted or grounded, replace the wiring. 3. Replace the fuser IH unit.

• Code: 6220
• Description: Abnormally high fuser edge thermistor 2 temperature
  Fuser edge thermistor 2 detects a temperature higher than 245°C/473°F for 1 s.
• Remedy: Fuser unit: 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Fuser unit and Engine PWB (YC26) 2. If the wiring is disconnected, shorted or grounded, replace the wiring. 3. Replace the Fuser unit and execute U167 counter clear.
  Engine PWB: 1. Check the engine software and upgrade to the latest, if necessary. 2. Replace the engine PWB.
  Fuser IH unit: 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Fuser IH unit and Fuser IH PWB (YC9 and 10) 2. If the wiring is disconnected, shorted or grounded, replace the wiring. 3. Replace the fuser IH unit.

• Code: 6230
• Description: Broken fuser edge thermistor 2 wire
  The Input signal from the fuser edge thermistor 2 is 992 or more (A/D value) continuously for 1 s when the temperature at the fuser edge thermistor 1 is higher than 100°C/212°F during warming up.
• Remedy: Fuser unit: 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Fuser unit and Engine PWB (YC26) 2. If the wiring is disconnected, shorted or grounded, replace the wiring. 3. Replace the Fuser unit and execute U167 counter clear.
  Engine PWB: 1. Check the engine software and upgrade to the latest, if necessary. 2. Replace the engine PWB.
  Fuser IH PWB: 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Fuser IH PWB( YC4) and Engine PWB (YC26) 2. Replace the fuser IH PWB.
  Fuser IH unit: 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Fuser IH unit and Fuser IH PWB (YC9 and 10) Fuser IH PWB( YC4) and Engine PWB (YC26) 2. If the wiring is disconnected, shorted or grounded, replace the wiring. 3. Replace the fuser IH unit.

• Code: 6250
• Description: Abnormally low fuser edge thermistor 2 temperature
  Fuser edge thermistor 2 detects a temperature lower than 100°C/212°F for 1 s during ready or print. Fuser edge thermistor 2 detects a temperature lower than 50°C/122°F for 1 s during low power mode.
• Remedy: Fuser unit: 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Fuser unit and Engine PWB (YC26) 2. If the wiring is disconnected, shorted or grounded, replace the wiring. 3. Replace the Fuser unit and execute U167 counter clear.
  Engine PWB: 1. Check the engine software and upgrade to the latest, if necessary. 2. Replace the engine PWB.
  Fuser IH PWB: 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Fuser IH PWB( YC4) and Engine PWB (YC26) 2. Replace the fuser IH PWB.
  Fuser IH unit: 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Fuser IH unit and Fuser IH PWB (YC9 and 10) Fuser IH PWB( YC4) and Engine PWB (YC26) 2. If the wiring is disconnected, shorted or grounded, replace the wiring. 3. Replace the fuser IH unit.
  Fuser unit: 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Fuser unit and Engine PWB (YC26) 2. If the wiring is disconnected, shorted or grounded, replace the wiring. 3. Replace the Fuser unit and execute U167 counter clear.