Field Service Ver. 1.0 Mar. 2005
17. Power supply trouble
17.1 Machine is not Energized at All (PU1 Operation Check)
Main Power Switch (SW1)
Control Board (PWB-MC)
Step
Is a power voltage supplied across PJ1PU1-1
1
and 2 on PU1?
2
Are the fuses (F1 and F2) on PU1 conducting?
Is DC24 V being output from PJ5PU1-2 on
3
PU1?
4
Is DC5 V being input to PJ7PU1-1 on PU1?
Is DC5 V being input to PJ1MC-7 on the Con-
5
trol Board? (LED on PWB-MC does not blink.)
17.2 Control panel indicators do not light.
Image Processing Board (PWB-C)
Control Panel (UN201)
Step
Is the I/F cable between the Scanner and
1
engine connected properly?
Is a power voltage being applied across
2
PJ1PU1-1 and 2 on PU1?
3
Is the fuse (F1,F2) on PU1 conducting?
Is DC5 V being output from PJ13PU1-1 on
4
PU1 and DC24 V from PJ12PU1-1?
Is PJ12C on PWB-C securely connected?
5
Is CN1UN201 on UN201 securely connected?
6
Relevant Electrical Parts
Check Item
Relevant Electrical Parts
Check Item
17. Power supply trouble
DC Power Supply (PU1)
WIRING
DIAGRAM
Result
(Location)
NO
Q to R-4 to 5
—
NO
NO
P-4 to 5
Q to R-6
NO
NO
I-13
YES
DC Power Supply (PU1)
WIRING
DIAGRAM
Result
(Location)
NO
—
NO
Q to R-4 to 5
—
NO
NO
P-6 to 7
Q to R-
NO
11 to 12
NO
Y-3 to 4
YES
Action
Check WIRING
between the wall outlet
and PJ1PU1.
Change PU1.
Change PU1.
Change PU1.
Change PU1.
Change PWB-MC
Action
Reconnect or change
the I/F cable.
Check the WIRING from
the wall outlet to SW1
PJ1PU1.
Change PU1.
Change PU1.
Reconnect.
Reconnect.
Change UN201.
Change PWB-C.
371