• Code: H2 00
• Description: Thermister open Fusing unit not installed. Thermister is open (more than 4.6-V input voltage is detected). Fusing unit not installed
• Causes: Thermister defective Control PWB defective Improper connection of fusing connector AC power supply defective Fusing unit not installed
• Remedy: Check harness and connector between thermister and control PWB. Clear the display of self-diagnostics with SIM14.

• Code: H3 00
• Description: Too hot fusing section. The fusing temperature is over 241.5#C (less than 1.3-V input voltage is detected.)
• Causes: Thermister defective Control PWB defective Improper connection of fusing unit connector AC power supply defective
• Remedy: Check heater lamp operation with SIM5-2. If lamp blinks properly: Check thermister and its harness. Check thermister input circuit of control PWB. If lamp lights and stays lit: Check lamp control circuits of AC PWB and control PWB. Clear the trouble with SIM14.

• Code: H4 00
• Description: Too cold fusing section Detail The temperature does not reach the preset value within the specified time (3 min. in usual modes; 5 min. in curl correction mode.) after the power relay is turned on.
• Causes: Thermister defective Heater lamp defective Control PWB defective Thermostat defective AC power supply defective Interlock switch defective
• Remedy: Check heater lamp for blinking with SIM5-2. If lamp blinks properly: Check thermister and its harness. Check thermister input circuit of control PWB. If lamp does not light: Check heater lamp for broken wire and thermostat for operation. Check interlock switch. Check lamp control circuit of AC PWB and control PWB. Clear the trouble with SIM14.

• Code: L1 00
• Description: Scanner field trouble No TRC or RRC output trouble. Scanner field is not finished within 10 seconds. TRC or RRC output is not produced within 5 seconds after the start of scanner field.
• Causes: Mirror unit defective Scanner wire disconnected
• Remedy: Check scanning operation with SIM1-1.

• Code: L3 00
• Description: Scanner return trouble. Scanner return is not finished within 3.5 seconds.
• Causes: Mirror unit defective Scanner wire disconnected
• Remedy: Check scanning operation with SIM1-1.

• Code: L4 01
• Description: Main motor lock detected. Motor lock signal is detected for 1.5 seconds during main motor rotation
• Causes: Main motor defective Improper connection of harness between PCU PWB and main motor Control circuit defective
• Remedy: Check main motor operation with SIM25-1. Check harness and connector between PCU PWB and main motor.

• Code: L4 02
• Description: Drum motor lock detected. Motor lock signal is detected for 1.5 seconds during drum motor rotation.
• Causes: Drum motor defective Improper connection of harness between PCU PWB and drum motor Control circuit defective
• Remedy: Check drum motor operation with SIM25-1. Check harness and connector between PCU PWB and drum Check polygon motor operation with SIM61-1. Check harness and connector for connection. Replace LSU if needed.motor.

• Code: L6 10
• Description: Polygon motor lock detected. It was judged that there is no output of polygon motor lock signal of LSU. The lock signal was checked at about 10-second intervals after the polygon motor started rotating. As result, it was judged that the polygon motor failed to operate normally.
• Causes: Disconnected connecter to LSU or detached harness inside LSU or broken wire. Polygon motor defective
• Remedy: Check polygon motor operation with SIM61-1. Check harness and connector for connection. Replace LSU if needed.