Canon iR8500 Servise Manual page 648

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The fax board is faulty.

0000 An error occurs on the fax board.

Any of the various printer board (accessories) is faulty.

0000 An error occurs in any of the printer board (accessories).

Any of the printer board (accessories) is faulty. The main controller PCB is

0000 An error occurs in the communication between any of the printer

In the case of E677,

· If it occurs when the main power is turned on,

Suspect a fault in the hardware.

Keep in mind that, if the power switch is turned off and then on too fast,

that discrepancy between the timing of initiation between the copier and

the printer board can cause E677. Be sure to allow 5 sec or more before

turning the power switch back on.

· If it occurs while the machine is in operation,

If the fault occurs during printing and if the machine starts up normally

when it is turned off and on after canceling the sprint job in question, sus-

pect an excess load on the CPU.

The CPU of the printer board is subjected to an excess load continuously

if the machine is forced to process a large amount of print data when re-

ceiving a large amount of data from the network. If this is the case, cancel

all print jobs, and turn off and then on the main power switch. Advise the

user that it is a good idea to send print data item-by-item instead of all at

the same time.

boards (accessories) and the machine controller PCB.

2000 2000 2000 2000

CANON iR8500 REV.0 MAR. 2001

Troubleshooting