Fan Error - Epson EPL-N3000 Service Manual

EPSON EPL-N3000/AcuLaser M4000N

3.2.4 FAN Error

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