• Code: 16
• Description: • If the transfer belt of the transport image transfer belt unit does not rotate
• Remedy: 1 Replace the image transfer belt unit.

• Code: 17
• Description: • If the toner cartridge does not rotate
• Remedy: 1 Check PC4 operation. PC4_ON 3-F. 2 Check CL1 operation. CL1_REM 2-F. 3 Check M2 operation 3-E. 4 Replace PWB-A. 5 Replace PWB-P.

• Code: 18
• Description: • If the unit does reach 80° C within 100 seconds from the time that warm-up begins • If the temperature of the fusing roller falls below 70° C in 10 seconds during standby • If the temperature of the fusing roller increases to 220°C in 0.1 second
• Remedy: 1 Check for continuity at H1 and H2. NO Replace H1 and H2. 2-B, 2-C 2 Check for continuity at TS1. NO Replace TS1. 2-C. 3 Is the resistance at TH1 infinite? (between CN18-1 and -2 on the thermistor) YES Clean TH1 or replace the fusing unit. HEATER 2-D NO Replace PU. Replace PWB-A.1

• Code: 19
• Description: • If the unit does reach 80° C within 100 seconds from the time that warm-up begins • If the temperature of the fusing roller falls below 70° C in 10 seconds during standby • If the temperature of the fusing roller increases to 220°C in 0.1 second
• Remedy: 1 Check for continuity at H1 and H2. NO Replace H1 and H2. 2-B, 2-C 2 Check for continuity at TS1. NO Replace TS1. 2-C. 3 Is the resistance at TH1 infinite? (between CN18-1 and -2 on the thermistor) YES Clean TH1 or replace the fusing unit. HEATER 2-D NO Replace PU. Replace PWB-A.1

• Code: 1A
• Description: • If the temperature of the fusing roller when the fusing unit begins warming up does not remain increased by 5°C for 1 second within the 40 to 50 seconds after the fusing roller begins warming up
• Remedy: 1 Is there a short circuit at TH1? (between CN18-1 and -2 on the thermistor) YES Clean TH1. HEATER 2-D Replace the fusing unit. NO Replace PU. Replace PWB-AP.

• Code: 1B
• Description: • If the temperature of the fusing roller when the fusing unit begins warming up does not remain increased by 5°C for 1 second within the 40 to 50 seconds after the fusing roller begins warming up
• Remedy: 1 Is there a short circuit at TH1? (between CN18-1 and -2 on the thermistor) YES Clean TH1. HEATER 2-D Replace the fusing unit. NO Replace PU. Replace PWB-AP.

• Code: 21
• Description: • If a overhead projector transparency is not detected
• Remedy: 1 Check PC3A operation. PC3_REM 5-D. 2 Replace PWB-A. 3 Replace PWB-P.

• Code: 29
• Description: • If the EEPROM malfunctioned
• Remedy: 1 Replace the EEPROM. 2 Replace PWB-A.