Epson EPL-N1600 Service Manual page 78

EPSON EPL-N1600
2.2 ABNORMAL PRINT OPERAITON
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
procedure, replace each component
listed below, one at a time, until the
problem disappears.
• No recommendations
1 Does the printer enter a print cycle?
2 +5 VDC POWER SUPPLY
1. Remove the C258MAIN.
2. Check the voltage between:
P31-A10 and FG
P31-A11 and FG
P31-B11 and FG
Is there +5VDC between P31 and FG?
Note:
Since there is no convenient test point
on the HPS (PL7.1.2) 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 failure may give
you the same readings.
C258MAIN Board
3
Execute Status Sheet printing.
Can the printer generate a test print?
Rev. A
Yes No
Go to step 3. Go to step 2.
Go to step 3. Replace the
HPS.
Go to step 4. Replace the
C258MAIN.
Step Actions and Questions
4 Does the printer still exhibit erratic
operation?
5 Replace the C258MAIN.
Does the printer still exhibit erratic
operation?
6 Execute Status Sheet printing.
Does the printer reset while making a
test print?
Chapter 3 Troubleshooting
Yes No
Go to step 5. Problem
solved.
Go to step 6. Problem
solved.
Go to Electrical -----
Noise.
80