Radio Shack 26-1154A Service Manual page 37

Table
4-3.
Detailed Troubleshooting Chart
(cont'd)
TROUBLE
Tears or creases
in paper
(jams)
Print too light.
Print contrast varies
across print
line.
Left hand margin
wanders.
Prints too slow.
PROBABLE CAUSE
Head gap improperly ad-
justed.
Defective head-carriage
assembly.
Head gap improperly ad-
justed.
Worn out
or
defective
ribbon.
Defective head-carriage
assembly.
Head gap improperly ad-
justed.
Platen assembly improperly
adjusted.
Defective head-carriage
assembly.
Defective mechanism assem-
bly.
Head gap improperly ad-
justed.
Defective printed circuit
board.
Defective mechanism assem-
bly.
Printer requires general
cleaning and lubrication.
Rotor/Hall effect device
improperly adjusted.
Print density
(speed)
improperly adjusted.
REMEDY
Adjust printer head
gap.
(See paragraph
5.3.)
Replace head-carriage
assembly.
(See para-
graph
6.8.)
Adjust printer head
gap.
(See paragraph
5.3.)
Replace ribbon.
(See
Owners Manual.)
Replace head -carriage
assembly.
(See
para-
graph
6.8.)
Adjust printer head
gap.
(See paragraph
5.3.)
Adjust platen assembly.
(See paragraph
6.9.)
Replace head-carriage
assembly.
(See para-
graph
6.8.)
Replace mechanism assem-
bly.
(See paragraph
6.2.)
Adjust printer head gap.
(See paragraph
5.3.)
Replace printed circuit
board.
(See paragraph
6.3.)
Replace mechanism assem-
bly.
(See paragraph
6.2.)
Clean and lubricate
printer.
(See para-
graph
4.6.)
Adjust rotor /Hall
effect device.
(See
paragraph
5.5.)
Adjust print density
(speed)
.
(See para-
graph
5.7.)
4-7