Casio UP-250 Technical Manual page 90

Table 4-2 Troubleshooting table for bad printing (continued)
Problem Probable cause
The print color The ribbon cassette
is mixed. (Half is floating.
of the character
is black and the
other half is
red.)
The ribbon is placed
incorrectly.
The ribbon frame
assembly is deformed.
The ribbon is
defective.
Color does not The ribbon release
change. (Black spring is unhooked
to red or red to or damaged.
black.)
The ribbon frame
spring is unhooked
or damaged.
Level Checkpoint
A
Verify that the ribbon cassette
is mounted correctly.
A
Verify that the ribbon is not
placed between the print
head mask assembly and
paper feed frame assembly.
Verify that the ribbon frame
B
assembly is not deformed.
A Verify that the color of the
ribbon is not blurred, or the
ribbon is not rumpled or
worm
Verify that the ribbon release
B
spring is not unhooked or
damaged.
Verify that the ribbon frame
B
spring is not unhooked or
damaged.
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Action
Mount the ribbon cassette
in the correct position.
(See "Replacing the
Ribbon Cassette" in
Chapter 3.)
Place the ribbon between
the print head unit and
print head mask
assembly.
If deformed, replace the
ribbon frame assembly.
Replace the ribbon
cassette if the ribbon is
worn or the print color is
light.
If the spring is unhooked,
hook it back on. If it is
damaged, replace it.
If the spring is unhooked,
hook it back on. If it
damaged, replace it.