Epson EPL-N3000 - NVRAM Error; ROS Error; Fuser Error

EPSON EPL-N3000/AcuLaser M4000N Revision C
Troubleshooting Troubleshooting When There is Error Display 73
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3.2.1 NVRAM Error
Note "*1" : The cause is considered to be external noises. To make sure, however, go to “3.4.17
Electrical Noise (p.127)” and perform the specified checking.
3.2.2 ROS Error
3.2.3 Fuser Error
Table 3-4. Troubleshooting for “NVRAM Error”
Step Action and Question Yes No
Parts below can be the source of this error (Chapter 4 Disassembly and Assembly)
• HVPS/MCU (p.301)
1
1. Turn on the main power.
♦Does the error occur?
Go to Step 4 Go to Step 2
2
1. Turn on the main power again.
♦Does the error occur?
Go to Step 4 Go to Step 3
3
1. Repeat turning on and off the main power several
times.
♦Does the error occur?
Go to Step 4
Problem
solved*
1
4
1. Replace the HVPS/MCU.
♦Does the error occur?
Go to 3.4.17
Electrical
Noise (p.127)
Problem
solved
Table 3-5. Troubleshooting for “ROS Error”
Step Action and Question Yes No
Parts below can be the source of this error (Chapter 4 Disassembly and Assembly)
• ROS ASSY (p.239)
• HVPS/MCU (p.301)
• Imaging Cartridge
• HARNESS ASSY ROS
• LVP S (p.287)
1
ROS ASSY
♦Go to 3.4.3 ROS ASSY (p.113)
— —
Table 3-6. Troubleshooting for “Fuser Error”
Step Action and Question Yes No
Parts below can be the source of this error (Chapter 4 Disassembly and Assembly)
• FUSER ASSY (p.253)
• HVPS/MCU (p.301)
• LVP S (p.287)
• HARNESS ASSY FUSER (p.251)
• HARNESS ASSY LVPS
1
Thermistor
1. Turn on the main power.
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?
Replace the
FUSER ASSY
Go to 3.4.4
FUSER ASSY
(p.115)