EPSON EPL-N4000/EPL-N4000+ Chapter 3 Troubleshooting
Rev.B 108
3.3.6 J1-2 is not displayed when the EP Cartridge is
out of toner
The Control Panel LCD does not display the code J1-2 when the EP
Cartrid
e is out of toner.
Table 3-23. J1-2 is not displayed when the EP cartridge is out
3.3.7 Inoperative Interlock Switch
The Control Panel LCD either does not display an interlock open Error
Code whenever a specific door or cover is open, or it does not display
an interlock open Error Code when a specific door or cover is closed.
Table 3-24. Inoperative Interlock Switch
Step Actions and Questions Yes No
SUSPECT COMPONENTS
The followin
components are
associated with this specific problem.
One or more of these components ma
ou
cannot isolate the problem usin
this FIP,
replace each component listed below,
one at a time, until the problem
disappears.
• LVPS Assembl
the
components.
1
TONER SENSOR TEST
1. Insert and remove a new EP Cartrid
e
into the printer.
Does the Control Panel LCD display L
when the EP Cartridge is in place, and
does the LCD display H when you
remove the Cartridge?
Replace the
MCU PWB.
Replace the
Toner
Sensor.
Step Actions and Questions Yes No
SUSPECT COMPONENTS
The followin
components are
associated with this specific problem.
One or more of these components ma
ou
cannot isolate the problem usin
this FIP,
replace each component listed below,
one at a time, until the problem
disappears.
• Wirin
the
components.
• Printer cover or door
1
INTERLOCK SWITCH TEST
1. Manuall
actuate and deactuate the
switch.
Does the Control Panel LCD display a
number that advances by one digit
each time you actuate or deactuate
the interlock switch?
Replace the
MCU PWB.
Replace the
Left Lower
Cover
Interlock
Switch or the
Left Cover
Interlock
Switch.
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