Epson Aculaser C9200N - Power Supply Trouble

EPSON AcuLaser C9200N Revision D
Troubleshooting Power supply trouble 134
Confidential
3.4 Power supply trouble
3.4.1 Machine is not energized at all (PU1 operation
check)
3.4.2 Control panel indicators do not light
Relevant Electrical Parts
 Lift-up Sensor (PC7-PC)
 Lift-up Motor (M3-PC)
 Control Board (PWB-Z-PC)
Step Check Item
Location
(electrical
parts)
Result Action
1
Is a power voltage supplied across
CN1PU1-1 and 2 on PU1?
S to T-2 NO
Check the WIRING
from the wall outlet to
S1 CN1PU1.
2 Are the fuses on PU1 conducting? --- NO Change PU1. (p.193)
3
Is DC3.3 V being output from
CN6PU1-1 on PU1?
R-4 NO Change PU1. (p.193)
4
Is "Low" being output from
CN7PU1-2 on PU1?
R-5 NO
Check the WIRING
from the PWB-P to
PWB-M to CN7PU1.
5
Is DC24 V being output from
CN5PU1-2 on PU1?
R-6 NO Change PU1. (p.193)
6
Is DC5 V being input to CN5PU1-3
on PU1?
R-4 NO Change PU1. (p.193)
7
Is DC5 V being input to CNPOW-2
on the Control Board? (LED on
PWB-M does not blink.)
I-6
NO Change PU1. (p.193)
YES
Change PWB-M.
(p.198)
Relevant Electrical Parts
 Controller Board (PWB-P)
 Control Panel (PWB-OP)
 DC Power Supply (PU1)
Step Check Item
Location
(electrical
parts)
Result Action
1
Is a power voltage being applied
across CN1PU1-1 and 2 on PU1?
S to T-2 NO
Check the WIRING
from the wall outlet to
S1 to CN1PU1.
2 Is the fuse on PU1 conducting? --- NO Change PU1. (p.193)
3
Is DC3.3 V being output from
CN6PU1-1 on PU1?
R-4 NO Change PU1. (p.193)
4
Is "Low" being output from
CN7PU1-2 on PU1?
R-5 NO
Check the WIRING
from the PWB-P to
PWB-M to CN7PU1.
5
Is DC5 V being output from
CN6PU1-2 on PU1?
R-4 NO Change PU1. (p.193)
6
Is J22P on PWB-P securely
connected?
T-10 NO
Reconnect.
Check the WIRING
from the PWB-P to
PWB-M.
7
Is CN1 on PWB-OP securely
connected?
V to W-10
NO Reconnect.
YES
Change PWB-OP.
(p.193)
Change PWB-P. (p.198)