Epson EPL-N4000, Service Manual

Page: 119 / 306

EPSON EPL-N4000/EPL-N4000+ Chapter 3 Troubleshooting
Rev.B 105
Table 3-17. Inoperative Control Panel 3.3.4 Inoperative Main Drive Assembly
The Main Drive Assembly does not function.
Table 3-18. Inoperative Main Drive Assembly
Step Actions and Questions Yes No
3 LVPS +5VDC CHECK
Measure the voltage between
J400-7 and FG, and between J400-
8 and FG on the MCU PWB.
Is there +5VDC between J400-7
and FG, and is there +5VDC
between J400-8 and FG.
Replace
the Control
Panel. Replace
the LVPS
Assembly.
Step Actions and Questions Yes No
SUSPECT COMPONENTS
The following components are
associated with this specific problem.
One or more of these components may
have failed partially or completely. If you
cannot isolate the problem using this FIP,
replace each component listed below,
one at a time, until the problem
disappears.
• No recommendations
1 MAIN DRIVE ASSEMBLY TEST
Does the Main Motor run and do the
gears of the Drive Assembly rotate
normally?
Replace the
MCU PWB Go to step 2
2
MAIN DRIVE ASSEMBLY MANUAL
TEST
Hand rotate (counter clockwise) the Main
Motor.
Can you rotate the Main Motor and do
the gears of the Drive Assembly rotate
easily and without binding?
Go to step 9 Go to step 3
3 EP CARTRIDGE BINDING CHECK
1. Remove the EP Cartridge.
2. Hand rotate (counter clockwise) the
Main Motor.
Can you rotate the Main Motor and do
the gears of the Drive Assembly rotate
easily and without binding?
Replace the
EP Cartridge
with a new
one. Go to step 4