Canon NP6330 Service Manual page 342

The troubleshooting procedures in this manual are prepared in the form of tables,
rather than flow charts. Study the following for an idea of how to consult the tables.
EX. AC power is absent.
Cause/Fault Step
Power plug 1
Covers 2
Main power 3
4
To find out the cause (faulty part) of a single problem, see the Cause/Fault column.
In the case of "AC power is absent," you will learn that the power plug may not be
connected, the covers may not be closed properly, or the main power may be absent.
To find out checks to make or remedies to provide for a single problem, see the
Remedy column as guided by YES/NO to the checks; or, move to the next step as
necessary.
Step
1
2
3
The instruction "Measure the voltage between J109-1 (+) and J109-2 (–) on the DC
controller PCB" asks you to connect the meter's positive probe (+) to J109-1 and
negative probe to J109-2 (–).
COPYRIGHT © 1997 CANON INC.
Guide to Troubleshooting Tables
Checks
Is the power plug connect-
ed to the outlet?
Are the front door and deliv-
ery cover closed properly?
Is the specified voltage
present at the power outlet?
Is the specified voltage pre-
sent between J1-1 and J1-
2? (J1 is located near the
power supply cord mount.)
Checks
Is the power
plug connected to
the outlet?
YES
Are the front door
and delivery cover
closed properly?
YES
Is the specified
voltage present at the
power outlet?
YES
CANON NP6330 REV.0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
YES/NO
NO Connect the plug.
NO Close the door and cover.
NO The problem is not the
copier's; advise the user.
YES Go to step 6.
YES/NO Remedies
Connect the
NO
plug
Close the door
NO
and cover.
The problem is not
NO
the copier's: advise
the user.
Remedies
11-1