Lexmark 4049LMO Service Manual - Page 77

Transfer, Wrap Tests, directional communication. Contact Lexmark Technical Support

Get Lexmark 4049LMO - Optra Lx+ B/W Laser Printer PDF manuals and user guides View all Lexmark 4049LMO manuals
Add to My Manuals
Save this manual to your list of manuals

Page 77 highlights

4049-XXX Transfer This setting varies the transfer voltage offset slightly. In normal environments it does not result in a visible difference in the printout. In extreme environments with unusual papers, this setting may be helpful. Do not change this setting unless replacing the transfer roll assembly did not correct the problem. 1. Enter Diagnostics mode. 2. Select [PRINTER SETUP]. 3. Select [Transfer]. 4. Select [Low], [Medium], or [High]. 5. Press Return to return to the Diagnostics mode main menu. Wrap Tests The Wrap Tests check the circuits used to communicate with the host computer. Note: The Parallel wrap test does not test all signals used for bidirectional communication. Contact Lexmark Technical Support for instructions on running the Parallel Confidence Test. To run the Wrap Test: 1. Turn the printer off. 2. Disconnect the interface cable. 3. Install the wrap plug in one of the interface cable connectors. Note: Install the parallel wrap plug part no. 1319128 for the parallel test or install the 25-pin serial wrap plug part no. 1329048 for the serial test. 4. Enter Diagnostics mode. 5. Select [HARDWARE TESTS]. 6. Select [Wrap Test]. 7. Select [Parallel] for the parallel port or [Serial] for the 25 pin serial port. 8. Select [Single] or [Continuous]. 9. Select [CANCEL] to stop continuous. Diagnostic Aids 3-16

  • 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
  • 171
  • 172
  • 173
  • 174
  • 175
  • 176
  • 177
  • 178
  • 179
  • 180
  • 181
  • 182
  • 183
  • 184
  • 185
  • 186
  • 187
  • 188
  • 189
  • 190
  • 191
  • 192
  • 193
  • 194
Diagnostic Aids 3-16
4049-XXX
Transfer
This setting varies the transfer voltage offset slightly. In normal envi-
ronments it does not result in a visible difference in the printout. In
extreme environments with unusual papers, this setting may be
helpful. Do not change this setting unless replacing the transfer roll
assembly did not correct the problem.
1.
Enter Diagnostics mode.
2.
Select [PRINTER SETUP].
3.
Select [Transfer].
4.
Select [Low], [Medium], or [High].
5.
Press Return to return to the Diagnostics mode main menu.
Wrap Tests
The Wrap Tests check the circuits used to communicate with the
host computer.
Note:
The Parallel wrap test does not test all signals used for bi-
directional communication. Contact Lexmark Technical Support for
instructions on running the Parallel Confidence Test.
To run the Wrap Test:
1.
Turn the printer off.
2.
Disconnect the interface cable.
3.
Install the wrap plug in one of the interface cable connectors.
Note:
Install the parallel wrap plug part no. 1319128 for the
parallel test or install the 25-pin serial wrap plug part no.
1329048 for the serial test.
4.
Enter Diagnostics mode.
5.
Select [HARDWARE TESTS].
6.
Select [Wrap Test].
7.
Select [Parallel] for the parallel port or [Serial] for the 25 pin
serial port.
8.
Select [Single] or [Continuous].
9.
Select [CANCEL] to stop continuous.