Epson EPL-N3000 Service Manual page 114

EPSON EPL-N3000/AcuLaser M4000N
Table 3-62. Troubleshooting for ROS ASSY (continued)
Step Action and Question
/ROSMOT ON Signal of Scanner Motor
1. Install the Imaging Cartridge.
2. Close the COVER OPEN.
9
3. Check voltage behavior between P/J131-3 ↔ P/
J131-2 after turning power on.
♦
Is the voltage 0V immediately after power on and 5
VDC 10 seconds after stop of the Main Motor?
Continuity of the HARNESS ASSY ROS
1. Disconnect P/J13 of the HVPS/MCU
10
2. Check continuity between P/J13 ↔ P/J130.
Is there continuity in each wiring between P/J13 ↔
♦
P/J130?
Continuity of the HARNESS ASSY ROS
1. Disconnect P/J17 and P/J16 from the HVPS/MCU.
2. Disconnect P/J170 and P/J160 from the ROS ASSY.
11
3. Check continuity between the following terminals:
P/J17 ↔ P/J170
P/J16 ↔ P/J160
♦ Does each wire between P/J17 ↔ P/J170 and
between P/J16 ↔ P/J160 have continuity?
SOS power supply circuit of the ROS ASSY
1. Disconnect P/J140 from the ROS ASSY.
2. Check continuity between the following terminals:
P/J140-8 ↔ P/J201-1
12
P/J140-6 ↔ P/J201-2
P/J140-7 ↔ P/J201-3
♦
Is there continuity between each circuitry of P/J140
↔ P/J201?
HVPS/MCU
13
1. Replace the HVPS/MCU. (p.301)
♦
Does the problem still occur?
ROS ASSY
14
1. Replace the ROS ASSY. (p.239)
♦
Does the problem still occur?
Troubleshooting
Yes No
Go to Step 11 Go to Step 10
Replace the
Replace the
HARNESS
HVPS/MCU
ASSY ROS
Replace the
Go to Step 12 HARNESS
ASSY ROS
Replace the
Go to Step 13
ROS ASSY
Problem
Go to Step 14
solved
Go to 3.4.17
Problem
Electrical
solved
Noise (p.127)
Troubleshooting for Individual Units
Revision C
114
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