Description: Charge grid circuit open
When high voltage goes to the corona grid, feedback voltage is more than the set value 9 times. This feedback voltage is used to update PWM for output control.
Causes: • Charge corona unit defective or disconnected
• Charge corona harness defective
• Charge corona power pack is defective.
Code: 305
Description: Charge corona wire cleaner error 1
The charge cleaner pad does not arrive at the home position:
• Motor locked within 4 s after switching on, or does not lock within 30 s.
• Motor locked within 10 s after reversing, or does not lock within 30 s.
Causes: • Charge corona wire cleaner motor defective
• Motor driver defective
Code: 306
Description: Charge corona wire cleaner error 2
Charge coronal motor is disconnected. (The current at the charge corona motor is detected less than 83 mA.)
Causes: • Charge corona wire cleaner motor connector is defective, connected
Code: 310
Description: Potential sensor calibration error 1
During drum potential sensor calibration, the drum potential sensor output voltage does not meet specification when test voltages (– 100V, –800V) are applied to the drum.
Causes: • Potential sensor defective
• Potential sensor harness disconnected
• Potential sensor connector defective or disconnected
• IOB defective
• OPC connector defective
• Development power pack defecti
Code: 311
Description: Potential sensor calibration error 2
During drum potential sensor calibration, the drum potential sensor output voltage does not meet specification when test voltages (– 100V, –800V) are applied to the drum.
Causes: • Potential sensor defective
• Potential sensor harness disconnected
• Potential sensor connector defective or disconnected
• IOB defective
• OPC connector defective
• Development power pack defective
Code: 312
Description: Potential sensor calibration error 3
During drum potential sensor calibration when adjusting the drum potential (VD), the drum potential sensor detects VD higher than VG (grid voltage). -or- When adjusting VD (drum surface potential of black areas after exposure), even after 5 adjustments of VG (charge corona grid potential), VD could not be set in the target range (– 800±10 + VL + 130V)
Causes: • Potential sensor defective
• Potential sensor harness disconnected
• Potential sensor connector defective or disconnected
• IOB defective
• OPC connector defective
• Development power pack defective
• Charge corona unit worn out, dirty