Canon CP660 Service Manual page 282

Guide to Tables
The tables used in this Service Handbook have been prepared from flow charts; study
the sample table below.
AC power is absent.
Cause Step
Power plug 1
Covers 2
Power source 3
4
To find the cause (faulty part) for a single problem, see the items under "Cause." For
"AC power is absent," the cause may be the power plug, covers, or power source.
To find checks to make or actions to take for a single problem, make checks in the
order given, answer the question Yes or No, and take the action given; move onto the
next step as necessary.
Step
1
2
3
Checks on the voltage using a tester call for special note; the description "Check the
voltage between J 109-1 (+) and J 109 (-) on the DC controller PCB" means that the
positive probe of the tester should be connected to J 109-1 (+) and the negative probe,
to J 109-2 (-).
The left door switch goes OFF and, at the same time, the laser shutter closes as
soon as the front left door is opened; as such, put the door switch actuators into left
door switch and laser shutter if the machine needs to be opened with its front left
door open. DO NOT BLOCK THE LASER PATH WITH LIGHT REFLECTING
OBJECTS.
COPYRIGHT © 1999 CANON INC.
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Check
Is the power plug connected to the
outlet?
Are the front door and/or delivery
cover closed properly?
Is the rated voltage (100 VAC) pre-
sent at the outlet?
Is the rated voltage present between
J 1-1 and J 1-2?
Check
Is the power
plug con-
nected to the
outlet?
YES
Are the front
door and/or
delivery cover
closed property?
YES
Is the rated
voltage (100
VAC) present
at the outlet?
YES
Yes/No
NO
NO
NO
YES
Result Action
NO
Connect the
piug.
Close the door
NO
and/or cover
property.
The problem is
NO
not of the copy-
ing machine;
advise the user.
CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Action
Connect the plug.
Close the door and/or
cover properly.
The problem is not of
the copying machine;
advise the user.
Check step 6) and
onward.