Nvram Error; Ros Error; Fuser Error - Epson EPL-N3000 Service Manual

EPSON EPL-N3000/AcuLaser M4000N

3.2.1 NVRAM Error

Table 3-4. Troubleshooting for "NVRAM Error"
Step Action and Question
Parts below can be the source of this error
• HVPS/MCU
(p.301)
1. Turn on the main power.
1
♦
Does the error occur?
1. Turn on the main power again.
2
♦
Does the error occur?
1. Repeat turning on and off the main power several
3
times.
♦
Does the error occur?
1. Replace the HVPS/MCU.
4
♦
Does the error occur?
Note "*1" : The cause is considered to be external noises. To make sure, however, go to
Electrical Noise (p.127)" and perform the specified checking.

3.2.2 ROS Error

Table 3-5. Troubleshooting for "ROS Error"
Step Action and Question
Parts below can be the source of this error
• ROS ASSY
(p.239)
• HVPS/MCU
(p.301)
• Imaging Cartridge
• HARNESS ASSY ROS
• LVPS
(p.287)
ROS ASSY
1
♦
Go to 3.4.3 ROS ASSY (p.113)
Troubleshooting
Yes No
(Chapter 4 Disassembly and
Assembly)
Go to Step 4 Go to Step 2
Go to Step 4 Go to Step 3
Problem
Go to Step 4
1
solved*
Go to 3.4.17
Problem
Electrical
solved
Noise (p.127)
"3.4.17
Yes No
(Chapter 4 Disassembly and
Assembly)
— —
Troubleshooting When There is Error Display

3.2.3 Fuser Error

Table 3-6. Troubleshooting for "Fuser Error"
Step Action and Question
Parts below can be the source of this error
• FUSER ASSY
(p.253)
• HVPS/MCU
(p.301)
• LVPS
(p.287)
• HARNESS ASSY FUSER
(p.251)
• HARNESS ASSY LVPS
Thermistor
1. Turn on the main power.
1
2. Observe whether the error display appears
immediately at power on or just after short warming
up.
♦
Does the error occur immediately at power on?
Revision C
Yes No
(Chapter 4 Disassembly and
Assembly)
Go to 3.4.4
Replace the
FUSER ASSY
FUSER ASSY
(p.115)
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