Epson EPL-N3000 Service Manual page 105

EPSON EPL-N3000/AcuLaser M4000N
Table 3-53. Troubleshooting for "Power Does Not Turn ON" (continued)
Step Action and Question
Fuse
1. Remove the SHIELD PLATE LVPS. (p.285)
3
2. Check to see if the fuse on the LVPS is blown.
♦
Is the fuse blown?
550 Option Feeder
1. Remove the 550 FEEDER OPTION. (p.311)
2. Check whether the two FANs operate or not
when power is switched on.
♦
4 Do the two FANs operate?
Option Duplex
1. Remove the Option Duplex. (p.342)
5
2. Check whether the two FANs operate or not
when power is switched on.
♦
Do the two FANs operate?
24V Power Supply
1. Remove the SHIELD PLATE HVPS. (p.296)
2. Make certain that P/J10 is connected to the
HVPS/MCU. (refer to "Connectors
3. Remove the Imaging Cartridge.
6
4. Measure the voltage across each of the following
pairs:
P/J10-1 ↔ P/J10-4
P/J10-2 ↔ P/J10-5
P/J10-3 ↔ P/J10-6
P/J10-8 ↔ P/J10-7
♦
Is each voltage 24 VDC?
Troubleshooting
Yes No
Replace the LVPS Go to Step 4
Go to
3.4.21 PWBA
FEEDER 550
(p.130),
3.4.22 PWBA
FEEDER 550
Go to Step 5
(p.130),
3.4.26 CLUTCH
ASSY PH (p.134)
and
3.4.27 CLUTCH
PR-REGI (p.135)
Go to
3.4.28 PWBA
DUPLEX (p.136)
Go to Step 6
and
3.4.29 MOTOR
DUPLEX (p.136)
(p.406)")
Go to
Go to Step 7 LVPS
(p.111)
Troubleshooting for Faulty Operation
Table 3-53. Troubleshooting for "Power Does Not Turn ON" (continued)
Step Action and Question
CLUTCH REGI
1. Remove the SHIELD PLATE HVPS. (p.296)
2. Disconnect P/J243 from the HVPS/MCU.
7
3. Remove the Imaging Cartridge.
4. Check to see if the Fan Main operates at turning
power on.
♦
Does the Fan Main operate?
OPERATION PANEL
1. Disconnect the HARNESS ASSY PANEL from
the Main Board.
2. Remove the Imaging Cartridge.
8
3. Turn on the main power.
4. Check for wind from the exhaust hole at the rear
of the printer to see if the Fan Main operates.
♦
Does the Fan Main operate?
HARNESS ASSY PANEL
1. Disconnect the HARNESS ASSY PANEL from
the Main Board.
9
2. Check the harness for broken wire or short
circuit.
3. Check continuity of each wire of harness.
♦
Is the harness free from broken wire or short
circuit and do all the wires have continuity?
ROS ASSY
1. Disconnect P/J13, P/J14, P/J16 and P/J17 from
3.4.1
the HVPS/MCU.
10
(Refer to "Connectors
2. Remove the Imaging Cartridge.
3. Turn on power.
♦
Does the Fan Main operate?
Yes
Go to 3.4.13
CLUTCH REGI
(p.123)
Go to Step 9
Replace the
OPERATION
PANEL
Replace the ROS
(p.406)")
ASSY
Revision C
No
Go to Step 8
Go to Step 10
Replace the
HARNESS
ASSY
PANEL
Go to Step 11
105
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