Epson EPL-N3000 - Fuser Assy

EPSON EPL-N3000/AcuLaser M4000N Revision C
Troubleshooting Troubleshooting for Individual Units 115
Confidential
3.4.4 FUSER ASSY
Table 3-63. Troubleshooting for FUSER ASSY
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)
• INTERLOCK S/W 24V (p.247)
• HARNESS ASSY FUSER (p.251)
• HARNESS ASSY AC110V (p.289)
• HARNESS ASSY LVPS
•LVPS (p.287)
1
Heater circuit
1. Remove the SHIELD PLATE LVPS. (p.285)
2. Disconnect P/J47 from the LVPS.
(Refer to “Connectors (p.406)”)
♦When the following connectors are checked, is there
normal continuity between them?
P/47-1 ↔ P/J47-5
P/47-1 ↔ P/J47-3
Go to Step 3 Go to Step 2
2
HARNESS ASSY FUSER
1. Remove the FUSER ASSY. (p.253)
WARNING!: Wait until the Fuser cools, and
then start work.
2. Check whether there is continuity between the
following connectors.
J4647B-3 ↔ J47-1
J4647B-2 ↔ J47-3
J4647-B1 ↔ J47-5
♦Is there continuity in each wiring between J4647 ↔
J47?
Replace the
FUSER ASSY
Replace the
HARNESS
ASSY FUSER
3
Fuser Power Supply
1. Disconnect P/J48 from the LVPS.
2. Remove the Imaging Cartridge.
3. Turn the Power Switch ON.
4. Check the voltage between P/J48-1 ↔ P/J48-3.
♦Is the voltage between P/J48-1 ↔ P/J48-3 the
standard voltage of 100-110 VAC?
Go to Step 5 Go to Step 4
4
Power Supply
1. Check the voltage of the AC outlet.
♦Is the power source voltage the standard voltage of
100-110 VAC?
Replace the
HARNESS
ASSY
AC100V
Inform and
ask customer's
electrical
engineer to
correct.
5
Heater Rod ON signal
1. Make certain that the FUSER ASSY has cooled.
2. Make certain that the Imaging Cartridge has been
removed.
3. Measure the voltage between P/J41-13 ↔ P/J41-3
and between P/J41-12 ↔ P/J41-3.
♦Is the voltage 0 VDC at turning on of the Heater
Rod and 3.3 VDC at its turning off between P/J41-
13 ↔ P/J41-3 and between P/J41-12 ↔ P/J41-3?
Go to Step 7 Go to Step 6
6
HARNESS ASSY LVPS
1. Disconnect P/J11 from the HVPS/MCU.
2. Check continuity between the following terminals:
P/J41-1 ↔ P/J11-16
P/J41-9 ↔ P/J11-8
P/J41-10 ↔ P/J11-7
P/J41-12 ↔ P/J11-5
P/J41-13 ↔ P/J11-4
♦Is there continuity in each wiring between P/J41 ↔
P/J11?
Replace the
HVPS/MCU
Replace the
HARNESS
ASSY LVPS
Table 3-63. Troubleshooting for FUSER ASSY (continued)
Step Action and Question Yes No