Protective Functions - Canon ImageRunner 600 Service Manual

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Protective Functions

The copier is designed to automatically stop the output of the DC power supply as soon as the

overcurrent protective mechanism turns on.

If an overcurrent is detected by the overcurrent detection circuit A, outputs [1] and [2] are

stopped; this is to prevent malfunction of the copier, as output [1] is used by the logic system.

If the overcurrent detection circuit B detects an overcurrent, output [2] is stopped.

DC power supply PCB

Figure 9-505 Protective Function Block Diagram

Detection by

detection circuit A

detection circuit B

CHAPTER 9 EXTERNALS/AUXILIARY MECHANISMS

Copier operation

Stops outputs [1] and [2]

from the DC power supply

Stops output [2] from the

DC power supply PCB.

Table 9-504 Protective Functions

CANON imageRUNNER 600 REV.1 JAN. 2000 PRINTED IN U.S.A.

detection signal 2

Overcurrent detection signal 1

Outputs [1] and [2] are stopped.

Output [2] is stopped.

Turn off the main power switch, and remove the

cause; then, leave the machine alone for about 3

min, and turn on the main power switch.

Remove the cause, and turn off and then on the

control panel power switch.

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