Canon PC740 Service Manual - Page 150

Composite, Power, Supply

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IIIIIIIMECHANICAL SYSTEM B. Composite Power Supply PCB 1. Removing the Composite Power Supply PCB 1) Open the copier's top unit. 2) Remove the left cover and the rear cover. 3) Remove the screw CD, and remove the copyboard cover support retainer O. e, 5) Remove the seven screws and remove the composite power supply PCB © while freeing the five claws ©. O • Figure 4-703 4) Disconnect the ten connectors CD from the composite power supply PCB ©. O O Figure 4-705 2. Points to Note When Handling the Composite Power Supply PCB Some capacitors on the composite power supply hold charges when the copier's power supply is off. Take extra care never to short the terminals of the capacitor whenever you have removed the composite power supply PCB. 4 0 4 0 0 4 Figure 4-704 4 - 34 COPYRIGHT 0 1994 CANON INC. CANON PC720R40R501770 REVD AUG.1994 PRINTEDIN JAPAN ompfut AU JAPON)

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IIIIIII
MECHANICAL
SYSTEM
B.
Composite
Power
Supply
PCB
1.
Removing
the
Composite
Power
Supply
PCB
1)
Open
the
copier's
top
unit.
2)
Remove
the
left
cover
and
the
rear
cover.
3)
Remove
the
screw
CD,
and
remove
the
copyboard
cover
support
retainer
O.
Figure
4-703
4)
Disconnect
the
ten
connectors
CD
from
the
composite
power
supply
PCB
©.
4
O
0
0
0
4
4
Figure
4-704
5)
Remove
the
seven
screws
e,
and
remove
the
composite
power
supply
PCB
©
while
freeing
the
five
claws
©.
•
O
O
Figure
4-705
2.
Points
to
Note
When
Handling
the
Composite
Power
Supply
PCB
Some
capacitors
on
the
composite
power
supply
hold
charges
when
the
copier's
power
supply
is
off.
Take
extra
care
never
to
short
the
termi-
nals
of
the
capacitor
whenever
you
have
removed
the
composite
power
supply
PCB.
4
-
34
COPYRIGHT
0
1994
CANON
INC.
CANON
PC720R40R501770
REVD
AUG.
1994
PRINTED
IN
JAPAN
ompfut
AU
JAPON)