Troubleshooting Tables - Epson TM-U200 series Technical Manual

C o n fid e n tia l

Troubleshooting Tables

The tables contain the following columns:
Problem
This is a symptom that can be verified.
Probable cause
This is a listing of one or several possible causes that should be examined.
Level
Level A The problem can be corrected by persons familiar with the printer who have
general knowledge, but special technical skills are not required.
Level B The problem requires thorough knowledge and familiarity with the printer as
well as technical skills and experience.
Checkpoint
These are one or more areas in the printer that should be checked.
Action
These are the steps to correct the problem. If the problem persists after taking these steps,
check the other possible causes listed.
Table 4-1 Troubleshooting table for printer operation failure
Problem
The POWER LED
does not light
when the power
is on.
The printer does
not print the self
test.
Rev. A
Probable cause
The AC adapter may
be bad.
The fuse may be
blown.
The main PCB may be
bad.
The main PCB may be
bad.
The FEED button may
be bad.
The printer
mechanism assembly
may be bad.
Level Checkpoint
B Check output voltage of the
AC adapter (approximately
+40 VDC with no load).
B Check if fuse F1 on the main
circuit board assembly is blown.
B Check if fuse (R42) on the main
circuit board assembly is blown
B The cause is none of the
above.
B Check the self test using
another main circuit board unit.
B Check the continuity of the
FEED button (SW2).
B The cause is none of the
above.
TM-U200 Series (Type B) Technical Manual
Action
Replace the AC adapter.
Replace fuse F1. (See
"Replacing the Fuse" in
Chapter 5.)
Replace the main circuit
board.
Replace the main PCB.
Replace the main PCB.
Replace SW2.
Replace the mechanism
assembly.
Troubleshooting 4-9