Troubleshooting Malfunctions; Troubleshooting; Malfunctions; E000 - Canon iR8500 Service Manual

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4 Troubleshooting Malfunctions

4.1 Troubleshooting Malfunctions

If you must remove and mount a sensor, pay attention to the orientation/po-

sition of the spring used to lock its detecting lever in place while doing so.

1) Reset E000, and turn off and then on the power switch. Make the

YES: The thermistor is faulty; check the following:

DC controller PCB

2) Turn offf the power switch, cooling the fixing upper roller suffi-

YES: Replace the DC controller PCB.

Heater (open circuit), AC driver PCB

3) Is the electrical continuity of each heater normal?

YES: Check the wiring; if normal, replace the AC driver PCB.

following selections in service mode:

COPIER>DISPLAY>ANALOG. Is overheating noted for both

'FIX-C' and 'FIX-E'?

• Thermistor for mounting condition

• Thermistor surface for dirt

• Connection

ciently, and turn on the power switch. Reset E000, and turn off and

then on the power switch. Make the following selections in service

mode: COPIER>I/O>DC-CON. Are bit 0 and bit 1 of IO-P12 '0'?

Replace the heater.

2000 2000 2000 2000

CHAPTER 6 TROUBLESHOOTING

CANON iR8500/7200 REV.1 AUG. 2001

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