—
— 80
The paper feed
pitch is not
uniform.
Operation of the
paper supply may be
incorrect.
Check if the specified paper
roll is used.
Use the correct paper roll.
(See “Paper Specifications”
in Chapter 1.)
The paper path may
be incorrect.
Check if the paper supply
path is blocked.
Remove paper particles
and foreign substances.
The connector is not
inserted correctly.
Make sure the PF motor cable
pins are inserted in connector
CN6 of the main circuit board.
Reinsert the connector.
The paper feed roller
may be worn or
damaged.
Check for wear and damage
on the surface of the roller.
Replace paper feed
roller.
The paper hold roller
assembly may be
bad.
Check if the paper hold roller
assembly rotates smoothly.
Clean and lubricate the
paper hold roller
assembly or replace it.
The paper hold roller
assembly may be
worn or damaged.
Check for wear and damage
to the rollers of the paper
hold roller assembly.
Replace the paper hold
roller assembly.
Gears may be worn
or damaged.
Check for wear and damage
to the paper feed reduction
gear and paper feed gear.
Replace any worn or
damaged parts.
The printer
prints, but the
ribbon is not
fed.
The ribbon cassette
may be loose.
Check if the ribbon cassette is
installed correctly.
Install the ribbon cassette
correctly. (See “Replacing
the Ribbon Cassette” in
Chapter 3.)
The ribbon cassette
may be bad.
Check if the ribbon is fed by
rotating the ribbon-tightening
knob.
Replace the ribbon
cassette.
The ribbon drive
plate assembly may
be bad.
Check if the ribbon drive plate
assembly moves smoothly.
Replace the ribbon drive
plate assembly.
The clutch portion of
ribbon take-up
assembly may be
worn.
Check whether the ribbon
moves smoothly when you
turn the upper portion of the
ribbon take-up assembly.
Replace ribbon take-up
assembly.
Gears may be worn
or damaged.
Check if the ribbon drive
assembly, ribbon intermediate
gear, ribbon transmission gear,
and ribbon take-up assembly
are worn or damaged.
Replace any worn or
damaged parts.
Check if any foreign
substances are attached to
gears.
Remove the foreign
substances.
Table 4-2 Troubleshooting table for bad printing (continued)
Problem
Checkpoint
Action
Level
Probable cause
B
B
B
B
A
A
B
B
B
B
A
A
A
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 ...