Epson AcuLaser M4000N, Service Manual

Page: 120 / 477

EPSON EPL-N3000/AcuLaser M4000N Revision C
Troubleshooting Troubleshooting for Individual Units 120
Confidential
3.4.8 INTERLOCK S/W 5V, SWITCH I/L ASSY
(HARNESS ASSY INTERLOCK4)
Table 3-67. Troubleshooting for INTERLOCK S/W 5V
Step Action and Question Yes No
Parts below can be the source of this error (
Chapter 4 Disassembly and Assembly
)
• INTERLOCK S/W
(p.247)
• SWITCH I/L ASSY
(p.173)
• HARNESS ASSY ROS
• HARNESS ASSY LVPS
• LVPS
(p.287)
• HVPS/MCU
(p.301)
1
INTERLOCK S/W 5V
1. Remove the INTERLOCK S/W 5VL.
2. While pressing and releasing the lever of the
INTERLOCK S/W 5V, check continuity between P/
J142-1
↔
P/J142-3.
(Refer to “Connectors (p.406)” )
♦
Is there continuity between P/J142-1
↔
P/J142-3
when the INTERLOCK S/W 5V is pressed and
discontinuity when it is released?
Go to Step 2
Replace the
INTERLOCK
S/W 5V
2
SWITCH I/L ASSY
1. Remove the P/J144.
2. While pushing and releasing the SWITCH I/L
ASSY, check continuity between P/J144-1
↔
P/
J144-3.
♦
Is there continuity between P/J144-1
↔
P/J144-3
when the SWITCH I/L ASSY is pressed and
discontinuity when it is released?
Go to Step 3
Replace the
SWITCH I/L
ASSY 5VR
3
HARNESS ASSY LVPS
1. Disconnect the P/J141, P/J142 and P/J144.
2. Check continuity of the following wiring:
J141-3
↔
P142-1
J141-1
↔
P144-3
P142-3
↔
P144-1
♦
Does each wiring have continuity?
Go to Step 4
Replace the
Harness Assy
LVPS
4
HARNESS ASSY ROS
1. Disconnect the P/J141, P/J14 and P/J143.
2. Check continuity of the following wiring:
P141-1
↔
J14-1
P141-3
↔
P140-8
♦
Does each wiring have continuity?
Go to 3.4.1
LVPS (p.111)
Replace the
HARNESS
ASSY ROS
Table 3-67. Troubleshooting for INTERLOCK S/W 5V (continued)
Step Action and Question Yes No