Lvps - Epson EPL-N3000 Service Manual

EPSON EPL-N3000/AcuLaser M4000N

3.4.1 LVPS

Table 3-60. Troubleshooting for LVPS
Step Action and Question
Parts below can be the source of this error

• LVPS

(p.287)
• HVPS/MCU
(p.301)
• HARNESS ASSY LVPS
LVPS control power
1. Remove the SHIELD PLATE LVPS. (p.285)
2. Disconnect P/J41 from the LVPS.
(Refer to "Connectors (p.406)")
1
3. Turn on the main power.
4. Measure the voltages between the following pins of
P/J41 to see if the values are as follows:
P/J41-1 ↔ P/J41-2
3.3V
P/J41-4 ↔ P/J41-3
5V
♦
Are the voltages between the pins of P/J41 as specified?
LVPS drive power
1. Disconnect P/J42 from the LVPS.
2. Turn on the main power.
3. Measure the voltages between the following pins of
P/J42 to see if the values are as follows:
2
P/J42-1 ↔ P/J42-2
24V
24V between P/J42-1 ↔ P/J42-2?
♦
HARNESS ASSY LVPS
1. Turn off the main power.
3
2. Disconnect the P/J11 from the HVPS/MCU.
3. Disconnect the P/J41 from the LVPS.
Is there continuity in each wiring between P/J11 ↔
♦
P/J41?
AC Power Supply
4
1. Check the AC power connection.
♦
Is the AC power cable connected and grounded properly?
Troubleshooting
Yes No
(Chapter 4 Disassembly and
Assembly)
Go to Step 2 Replace the LVPS
Go to 3.4.7
INTERLOCK S/W
24V (p.119)
or 3.4.9
INTERLOCK S/W
Go to Step 3 REAR (p.121)
or 3.4.10 SWITCH
I/L ASSY
(INTERLOCK S/
W FRONT R)
(p.121)
Replace the
Go to Step 4 HARNESS ASSY
LVPS
Replace the Notify the
HVPS/ customer or its
MCU electrical engineer.
Troubleshooting for Individual Units
Revision C
111
Confidential