Ricoh Kr-P2 Field Service Manual page 112

2. Appendix: Troubleshooting Guide
Code No.
Fusing overheat error: Software
A fusing temperature of over 235°C is
543 A
detected for 0.5 seconds by the fusing
thermistor.
2
Fusing overheat error: Software
544 A
The machine detects an overheat error of
the hardware.
Fusing lamp stays on
The fusing lamp stays on more than 12
545 A
seconds after the main motor has been
turned off.
Zero cross signal malfunction
Zero cross signals are already detected for
0.15 seconds before the fusing relay-on.
547 B
Zero cross signals are not detected for 3
seconds or the machine cannot detect a
frequency.
Fusing jam error: 3 counts
At the fusing exit sensor the paper jam is
559 A
detected late for three pulse counts (lag
error) when SP1913-001 is set to "1: Yes".
Communication error - GAVD
620 B
The engine board detects an unknown
device.
Communication error - PFU
Three consecutive errors are detected
622 B
during polling after the PFU is successfully
detected by the machine.
14
Symptom Possible Cause
• Fusing thermistor defective
• Power supply board defective
• Fusing control out of control
• Power supply board defective
• Fusing thermistor defective
• Power supply board defective
• Defective connection of the fusing unit
• Power supply board defective
• Unstable main power supply
condition
• Obstacle in the paper transport path
• Fusing unit installed incorrectly
• Fusing unit defective
• Engine board defective
• Noise
• Harness connection disconnected
between the machine and PFU