Epson TM U200D Technical Reference - Page 87

Troubleshooting Tables, These are one or more areas in the printer that should be checked.

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TM-U200D/U200PD Technical Manual Troubleshooting Tables If a problem that can be verified by visual examination has occurred, use the Troubleshooting Tables to determine the cause and perform repairs. The tables contain the following columns: t Problem This is the symptom that can be verified. t Probable cause This is a listing of one or several possible causes that should be examined. t Level Level A The problem can be corrected by persons who are familiar with the printer and 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. t Checkpoint These are one or more areas in the printer that should be checked. t 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 Probable cause Level Checkpoint Action The AC adapter may be bad. Check the output voltage of B the AC adapter. (approx. +40 Replace the AC adapter. VDC with unloaded) The POWER LED does not light when the power is on. The fuse may be blown. Check if the fuse F1 on the B Main circuit board ass'y is blown. Replace fuse F1. (See "Replacing the Fuse" in Chapter 5.) B Check if fuse (R42) on the Main Replace the Main circuit circuit board ass'y is blown board. The main PCB may be bad B The cause is none of the above. Replace the main PCB. The main PCB may be bad. B Check the self test using another Main circuit board unit. Replace the main PCB. The printer does not print the self test. The FEED button may be bad. The printer mechanism assembly may be bad. B Check the continuity of the FEED button (SW2). B The cause is none of the above. Replace SW2. Replace the mechanism assembly. Rev. B Troubleshooting 4-9

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Rev. B
Troubleshooting
4-9
TM-U200D/U200PD Technical Manual
Troubleshooting Tables
If a problem that can be verified by visual examination has occurred, use the Troubleshooting
Tables to determine the cause and perform repairs.
The tables contain the following columns:
Problem
This is the 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 who are familiar with the printer and
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
Probable cause
Level
Checkpoint
Action
The POWER LED
does not light
when the
power is on.
The AC adapter may
be bad.
B
Check the output voltage of
the AC adapter. (approx. +40
VDC with unloaded)
Replace the AC adapter.
The fuse may be
blown.
B
Check if the fuse F1 on the
Main circuit board ass’y is
blown.
Replace fuse F1.
(See
“Replacing the Fuse” in
Chapter 5.)
B
Check if fuse (R42) on the Main
circuit board ass’y is blown
Replace the Main circuit
board.
The main PCB may be
bad
B
The cause is none of the
above.
Replace the main PCB.
The printer does
not print the self
test.
The main PCB may be
bad.
B
Check the self test using
another Main circuit board unit.
Replace the main PCB.
The FEED button may
be bad.
B
Check the continuity of the
FEED button (SW2).
Replace SW2.
The printer
mechanism assembly
may be bad.
B
The cause is none of the
above.
Replace the mechanism
assembly.