Epson EPL-N1600 Service Manual page 66

EPSON EPL-N1600
1.2 SERVICE REQ E0004
The ROS (Raster Output Scanner) Assy. is defective.
Step Actions and Questions
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.
• Harness Assembly ROS
• Harness Assembly SOS
1 SCANNER MOTOR
Unplug J27 (Main Drive Motor) from
CN227 of the C258MAN and J222
(Fan) from the HPS.
1. Run a test print.
2. Listen for the sound of the Scanner
Motor.
Can you hear the Scanner Motor
running before the U2 code appears?
2 LASER DIODE POWER
1. Remove the Main Cover.
2. Remove the Lever Jam Clear.
3. Switch on printer power.
4. Cheat the Main Interlock Switch.
5. Do not unplug P/J262.
6. Check the voltage between P262-7
and P262-5 on the PWB LD.
Is there +5 VDC between P262-5 and
P262-7?
Rev. A
Yes No
Go to step 3. Replace the
ROS Assembly.
Replace the Go to step 4.
ROS Assembly.
Step Actions and Questions
3 +5 VDC POWER SUPPLY
1. Remove the Cover Side, and then
C258MAIN board.
2. Check the voltage between:
-FG and J31-A10
-FG and J31-A11
-FG and J31-B11
Is there +5VDC between:
FG and J31-A10
FG and J31-A11
FG and J31-B11?
Note:
Since there is no convenient test point
on the HPS to check for +5VDC, this
step has you check four separate
+5VDC voltages that run from the HPS
through the PWBA Hotaru and on to the
C258MAIN through J31. Although not a
foolproof test, it should give you some
indication of whether or not the +5VDC
portion of the HPS is working correctly.
Failure to read +5VDC on any of the
test points most likely reflect a HPS
failure, but in some cases an PWBA
Hotaru or C258MAIN failure may give
you the same readings.
Chapter 3 Troubleshooting
Yes No
Replace the Replace the
C258MAIN. HPS.
68