2-32
Service Manual
25XX-100, -110
Printhead service check
FRU
Action
1
Printhead cables
Printhead
If the printout contains missing or extra dots or
lines, do the following:
• Check the continuity and connection of the
printhead cables and the short flexible cable.
• Be sure the voltages to the logic board are
correct.
If dots
are
missing:
• Perform the print test to determine which
wire is not firing.
• Remove the printhead, and verify that no
pins on the printhead are broken or missing.
If pin(s) are missing, replace the printhead.
• Check the printhead resistance according to
“Printhead impedance tables” on
page 2-33
. Be sure no pins have continuity
to the printhead housing.
If the printout does
not
contain missing or extra
dots or lines, be sure the printhead is securely
installed in the carrier and perform the
“Printhead-to-platen gap adjustment” on
page 4-2
.
2
Carrier shaft
Carrier unit
Platen assembly
Printhead nose
Ribbon guide
Check and replace worn or damaged parts.
Summary of Contents for 25**-100
Page 11: ...xi 25XX 100 110 ...
Page 62: ...2 42 Service Manual 25XX 100 110 ...
Page 74: ...3 12 Service Manual 25XX 100 110 ...
Page 118: ...4 44 Service Manual 25XX 100 110 Sensor removals ...
Page 124: ...4 50 Service Manual 25XX 100 110 ...
Page 127: ...Locations and connectors 5 3 25XX 100 110 Logic board 9w 24w ...
Page 130: ...5 6 Service Manual 25XX 100 110 Logic board 9w 24w ...
Page 132: ...5 8 Service Manual 25XX 100 110 Logic board 9w 24w ...
Page 134: ...5 10 Service Manual 25XX 100 110 Logic board 9w 24w ...
Page 136: ...5 12 Service Manual 25XX 100 110 Logic board 9w 24w ...
Page 138: ...5 14 Service Manual 25XX 100 110 Logic board 9w 24w ...
Page 140: ...5 16 Service Manual 25XX 100 110 Logic board 9w 24w ...
Page 142: ...5 18 Service Manual 25XX 100 110 Logic board 9w 24w ...
Page 144: ...5 20 Service Manual 25XX 100 110 Logic board 9w 24w ...
Page 146: ...5 22 Service Manual 25XX 100 110 Logic board 9w 24w ...
Page 148: ...5 24 Service Manual 25XX 100 110 Logic board 9w 24w ...
Page 152: ...5 28 Service Manual 25XX 100 110 ...
Page 160: ...7 2 Service Manual 25XX 100 110 Assembly 1 Covers ...
Page 162: ...7 4 Service Manual 25XX 100 110 Assembly 1 cont Covers ...
Page 164: ...7 6 Service Manual 25XX 100 110 Assembly 2 Carrier paper feed right side ...
Page 166: ...7 8 Service Manual 25XX 100 110 Assembly 2 cont Carrier paper feed right side ...
Page 168: ...7 10 Service Manual 25XX 100 110 Assembly 3 Carrier paper feed left side ...
Page 170: ...7 12 Service Manual 25XX 100 110 Assembly 3 cont Carrier paper feed left side ...
Page 172: ...7 14 Service Manual 25XX 100 110 Assembly 4 Electronics ...
Page 174: ...7 16 Service Manual 25XX 100 110 Assembly 5 ASF Roller support ...
Page 176: ...7 18 Service Manual 25XX 100 110 Assembly 6 ASF Side frame covers ...
Page 178: ...7 20 Service Manual 25XX 100 110 Assembly 7 Tractor 2 option ...
Page 180: ...7 22 Service Manual 25XX 100 110 ...
Page 184: ...I 4 Service Manual 25XX 100 110 ...