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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
general knowledge, but special technical skills are not required.
Level B
The problem can be corrected by persons familiar with the printer who have
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
Checkpoint
Action
Level
Probable cause
The POWER
LED does not
light when the
power is on.
The AC adapter
may be bad.
Check output voltage of the
AC adapter (approximately
+40 VDC with no load).
Replace the AC adapter.
The fuse may be
blown.
Check if fuse F1 on the
main circuit board assembly
is blown.
Replace fuse F1. (See
“Replacing the Fuse” in
Chapter 5.)
Check if fuse (R42) on the main
circuit board assembly is blown
Replace the main circuit
board.
The main PCB may
be bad.
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.
Check the self test using
another main circuit board unit.
Replace the main PCB.
The FEED button
may be bad.
Check the continuity of the
FEED button (SW2).
Replace SW2.
The printer
mechanism assembly
may be bad.
The cause is none of the
above.
Replace the mechanism
assembly.
B
B
B
B
B
B
B
Summary of Contents for UP-250
Page 1: ...EXTERNAL PRINTER FEB 2000 MODEL UP 250 without price TECHNICAL MANUAL ...
Page 95: ... 86 END END Yes No Action 4 Replace main PCB Replace printer OK Action 4 mechanism assembly ...
Page 136: ... 127 ...
Page 149: ... 140 Main Circuit Board Parts Layout ...
Page 150: ... 141 RS 232 Serial Interface Circuit Board Parts Layout ...
Page 151: ... 142 IEEE 1284 Parallel Interface Circuit Board Parts Layout ...
Page 152: ...RS 485 Serial Interface Circuit Board Parts Layout 143 ...
Page 160: ... 151 Case Unit Lubrication Points Diagram 4 G 31 4 G 31 3 G 31 3 G 31 ...
Page 163: ... 154 EXPLODED DIAGRAM FOR TM U200B U210B NO 1 ...
Page 164: ... 155 EXPLODED DIAGRAM FOR TM U200B U200PB U210B U210PB NO 2 ...