UBI EasyCoder 501 SA, Руководство по обслуживанию

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UBI EasyCoder 501 – Service Manual
194
26. TROUBLE SHOOTING, cont'd.
26.3
Printing Troubles
Continued!
The best way to start is to get an overall check of the printing, which
is easily done by ordering a series of test labels to be printed in the
Test Mode (see chapter 25) or in the Setup Mode (see Technical
Manual or Appendix 1).
In case the printhead is suspected to be defect, it could be checked
by the following UBI Fingerprint instructions (see UBI Fingerprint
Reference Manual):
•
FUNCTEST$ ("HEAD")
•
HEAD
•
SYSVAR (21|22)
No printout at all
• Are both cables between printhead and CPU board fitted correctly
and not broken or otherwise damaged? The flat cable from the
inner connector on the printhead should run to P-700 and the
thicker cable from the printhead's outer connector to P-301.
• Is the printhead clean? Residue from label adhesive or burnt
transfer ribbon on the printhead prevents it from functioning
correctly. Clean as described in the User's Manual.
• In case of direct thermal printing, verify that the stock of paper is
intended for direct thermal printing (not thermal transfer!) and of
approved quality.
• In case of thermal transfer printing, check that the ribbon is of
approved quality and fitted so it can move freely. The “ink”-
coated side must be turned towards the paper.
• Check that the printhead voltage, P24, is +24V
±
1V when
measured between pins 1-5 and 6-10 of connector P-301 or
testpoint P24 (see chapter 17.7).
• Check that the printhead is completely lowered and pressing
against the paper web with a sufficient force, see chapter 24.3.
• Check that the headlift sensor is in order, see “Printhead lift sensor
out of order” in chapter 26.2.