How To Read The Troubleshooting Tables - Canon LBP-CX Series Service Manual

B. How to Read the Troubleshooting Tables
The troubleshooting tables from III. to V. in this chapter are explanations of the general servicing procedure.
The example below shows how to read the tables.
(Example) There is no power.
Case Step Check
Result Measure
Power cord l
Is the printer plugged in?
NO Plug it in.
Upper main body
2
Is the upper main body closed? NO
Close securely.
Power switch,
3
Are the power switch and circuit
NO
Switch ON.
circuit breaker breaker ON?
Line voltage 4
Is normal voltage supplied at the
NO
This is not a problem with the
outlet?
printer. Inform the customer.
Insert a screwdriver into the
Check the door switch actuator
Power network 5 door switch hole. Does the printer
YES
and readjust it if necessary.
switch ON?
Table 7-7
If only the cause of what is considered to be the problem (name of a faulty part) is desired, look under
"cause". With the problem "no power" in the chart above, the power cord, upper main body, power switch, cir-
cuit breaker, line voltage or door switch could be faulty.
To solve a problem, begin at step one and perform the check explained there. If the result is not as indicated
in the "Result" column, go to the next step. But if the result is as printed, perform the measure in the right-
hand column and observe the result. If the problem is not eliminated, continue to the next step.
Step Check
Result Measure
NO
Plug it in.
2
NO
Close securely.
3
NO
Switch ON.
YES
etc.
Figure 7-17
7-14
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BY CANON INC. CANON LBP-CX SERIES REV.2 JULY 1985 PRINTED IN JAPAN (IMPHIME AU JAPOllJ