Lexmark Forms Printer 2400 Service Manual - Page 47

Printhead Service Check, Printhead Cables

Get Lexmark Forms Printer 2400 PDF manuals and user guides View all Lexmark Forms Printer 2400 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 47 highlights

24xx Printhead Service Check FRU 1 Printhead Cables Printhead 2 Carrier Shaft Carrier Unit Platen Assembly Printhead Nose Ribbon Guide Action 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 2-30. 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. Check and replace worn or damaged parts. Diagnostic Information 2-29

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
  • 138
  • 139
  • 140
  • 141
  • 142
  • 143
  • 144
  • 145
  • 146
  • 147
  • 148
  • 149
  • 150
  • 151
  • 152
  • 153
  • 154
  • 155
  • 156
  • 157
  • 158
  • 159
  • 160
  • 161
  • 162
  • 163
  • 164
  • 165
  • 166
  • 167
  • 168
  • 169
  • 170
Diagnostic Information
2-29
24xx
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 2-30
. 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.