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Adjustments / Maintenance
Users Manual Model 686 / 686 HT
select the head category. The head category is based on the mean resistance of
the print head being used. The printhead will have a value for the average
printhead resistance, for example “Rav = 1438
Ω
”, printed on a label on the
printhead. Look up the value in the following table and enter the appropriate
head category. Press the ENTER key to enter the value. The printer must be
turned off and back on for the change to take effect.
HEAD
CATEGORY
AVERAGE
RESISTANCE
(Rav)
1
1075 -1123
2
1124 -1170
3
1171 -1218
4
1219 -1265
5
1266 -1312
6
1313 -1360
7
1361 -1407
8
1408 -1455
As a final test of the print head installation, run a test pattern to check the print
quality. You should observe an even grid of rectangles. If you do not see such a
grid, you may wish to reference the topic of "Print Head Tangent Adjustment".
Summary of Contents for 686 HT
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Page 67: ...Users Manual Model 686 686 HT Electrical Drawings 65 Electrical Drawings...
Page 85: ...Users Manual Model 686 686 HT Assembly Drawings 83 Assembly Drawings...
Page 86: ...84 Assembly Drawings Users Manual Model 686 686 HT Unwind Assembly Drawing...
Page 88: ...86 Assembly Drawings Users Manual Model 686 686 HT Unwind Turnbar Assembly Drawing...
Page 90: ...88 Assembly Drawings Users Manual Model 686 686 HT Contrast Sensor Assembly Drawing...
Page 106: ...104 Assembly Drawings Users Manual Model 686 686 HT Ink Save PC Board Assembly 4 1 5 7 2 6 3...