Epson AcuLaser M4000N, Service Manual

Page: 119 / 477

EPSON EPL-N3000/AcuLaser M4000N Revision C
Troubleshooting Troubleshooting for Individual Units 119
Confidential
3.4.7 INTERLOCK S/W 24V
6
Continuity of the HARNESS ASSY TRAY1,
HARNESS ASSY TRAY2
1. Remove the SENSOR NO PAPER.
( p. 222 / p. 232 )
2. Disconnect the connector P/J24 on the HVPS/MCU.
(Refer to “Connectors (p.406)” )
3. Check continuity between P/J245
↔
P/J240 and
between P/J248
↔
P/J246.
P/J245-1
↔
P/J240-3
P/J245-2
↔
P/J240-2
P/J245-3
↔
P/J240-1
P/J248-1
↔
P/J246-3
P/J248-2
↔
P/J246-2
P/J248-3
↔
P/J246-1
♦
Does each wire between P/J245
↔
P/J240 and
between P/J248
↔
P/J246 have continuity?
Go to Step 7
Replace the
HARNESS
ASSY TRAY1
or HARNESS
ASSY TRAY2
7
HVPS/MCU
1. Disconnect P/J11 on the HVPS/MCU.
♦
Is there continuity between P/J11-16
↔
P/J24-6,
P/J11-16
↔
P/J24-1 when the INTERLOCK S/W
24Vis pressed and discontinuity when it is released?
Go to 3.4.1
LVPS (p.111)
Replace the
HVPS/MCU
8
SENSOR NO PAPER (2)
1. Replace the SENSOR NO PAPER. ( p. 222 / p. 232 )
♦
Does the problem still occur?
Replace the
HVPS/MCU Problem
solved
Table 3-65. Troubleshooting for SENSOR NO PAPER
Step Action and Question Yes No
Table 3-66. Troubleshooting for INTERLOCK S/W 24V
Step Action and Question Yes No
Parts below can be the source of this error (
Chapter 4 Disassembly and Assembly
)
• INTERLOCK S/W 24V
(p.247)
• LVPS
(p.287)
• HVPS/MCU
(p.301)
1
INTERLOCK S/W 24V
1. Disconnect P/J45 on the LVPS.
2. While pressing and releasing the lever of the
INTERLOCK S/W 24V, check continuity between
P/J45-1
↔
P/J45-3.
(Refer to “Connectors (p.406)” )
♦
Is there continuity between P/J45-1
↔
P/J45-3 when
the INTERLOCK S/W 24Vis pressed and
discontinuity when it is released?
Go to 3.4.1
LVPS (p.111)
Replace the
INTERLOCK
S/W 24V