Epson EPL-N3000 - FAN Error

EPSON EPL-N3000/AcuLaser M4000N Revision C
Troubleshooting Troubleshooting When There is Error Display 74
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3.2.4 FAN Error
Table 3-7. Troubleshooting for “FAN Error”
Step Action and Question Yes No
Parts below can be the source of this error (Chapter 4 Disassembly and Assembly)
• FAN MAIN (p.293)
•FAN SUB (p.241)
• LVP S (p.287)
• HVPS/MCU (p.301)
1
FAN MAIN
♦Does the Fan operate when the main power is turned
on?
Go to Step 2 Go to Step 3
2
Operation of FAN SUB
♦Does the FAN SUB operate when power is switched
on?
Go to Step 3 Go to Step 7
3
Power supply to FAN MAIN
♦Is the FAN MAIN connected correctly and is the
voltage between P/J24-18
↔ P/J24-17 24 VDC (12
VDC at a half speed)?
Go to Step 4 Go to Step 5
4
FAN ALARM signal
♦Is the voltage between P/J24-17 ↔ P/J24-16 0.82
VDC or more?
Replace FAN
MAIN
Replace the
HVPS/MCU
5
FAN MAIN
1. Replace the FAN MAIN. (p.293)
♦Does the FAN error occur when power is switched
on?
Go to Step 6
Problem
solved
6
LVPS
1. Replace the LVPS. (p.287)
♦Does the FAN error occur when power is switched
on?
Replace the
HVPS/MCU
Problem
solved
7
Power supply to FAN SUB
♦Is the FAN SUB connected correctly and is the
voltage between P/J27-19 ↔ P/J27-18 24 VDC (12
VDC at a half speed)?
Go to Step 8 Go to Step 9
8
FAN ALARM signal
♦Is the voltage between P/J27-18 ↔ P/J27-17 0.82
VDC or more?
Replace FAN
SUB
Replace the
HVPS/MCU
9
FAN SUB
1. Replace the FAN SUB. (p.241)
♦Does the FAN error occur when power is switched
on?
Go to Step 10
Problem
solved
10
LVPS
1. Replace the LVPS. (p.287)
♦Does the FAN error occur when power is switched
on?
Replace the
HVPS/MCU
Problem
solved
Table 3-7. Troubleshooting for “FAN Error”
Step Action and Question Yes No