Epson EPL-N4000 - Inoperative Control Panel; Rev.b

EPSON EPL-N4000/EPL-N4000+ Chapter 3 Troubleshooting
Rev.B 104
Table 3-15. Erratic Operation
3.3.3 Inoperative Control Panel
The Control Panel LEDs, LCD, and /or Keypad do not function or do not
function correctly.
Table 3-16. Inoperative Control Panel
Step Actions and Questions Yes No
7
HOST/PRINTER INTERFACE
CABLE REPLACEMENT
Replace the interface cable connectin
g
the host to the printer.
Is the problem still present?
Go to step 8 Problem
solved
8
ESS PWB REPLACEMENT
Replace the ESS PWB
(See Chapter
4)
Does the printer still exhibit erratic
operation?
Go to
Suspect
Components
Problem
solved
Step Actions and Questions Yes No
SUSPECT COMPONENTS
The followin
g
components are
associated with this specific problem.
One or more of these components ma
y
have failed partiall
y
or completel
y
. If
y
ou
cannot isolate the problem usin
g
this FIP,
replace each component listed below,
one at a time, until the problem
disappears.
•Wirin
g
and connectors linkin
g
the
components.
• ESS PWB
1
CONTROL PANEL TEST
1. Remove the Control Panel from the
Top Cover
2. Connect the Control Panel to P 410 on
the MCU PWB.
Go to step 2 Go to step 3
2
C262 MAIN CONTROLLER
REPLACEMENT
Replace the C262 Main Controller
Board.
Is the problem still present?
Replace the
MCU PWB
(See
Chapter 4)
Problem
solved