Canon BJ-W3000 Service Manual page 7

• In order to remedy a problem, check the Steps in order. Answer the first "Check item"
question. If your answer matches that given in the "Result", follow the corresponding proce-
dure in the "Remedy" column. If your answer is not the same, go on to the next step and
repeat the same procedure.
<Step>
1
connected to the receptacle
2
voltage applied to the outlet?
3
on the DC power PCB (F1)
• When checking voltages using a tester is required, it will be specified in the check item.
For instance; "measure the voltage between J102-1 (+) and JI02-2 (-) on the engine control-
ler PCB". In this case, apply the plus and minus leads of the tester to the (+) and (-) termi-
nals indicated after the connector numbers:
e.g. JI02-1 (+): Plus lead
JI02-2 (-): Minus lead
5. The signal address of the circuit diagram is shown by applicable pages of each controller
(indicated at the upper right of the circuit diagram) and its location.
CAUTION
When checking voltages with a tester, touching the components or connector terminals on
the PCB with the hands may cause an electric shock. It is advisable to wear rubber gloves
or the like when power is supplied to the machine to protect yourself from electric shock.
iv iii
<Check item>
Is the
power cord properly
on the machine
and outlet?
YES
Is the specified
YES
Is the fuse
blown?
NO
PREFACE
<Result>
NO
NO
YES
<Remedy>
Connect in the power code
to the machine and outlet.
Explain to the customer that
the trouble is not attributable
to the machine.
Remove the cause of the
blown fuse and replace the
DC power PCB.