Loveshaw MicroJet 5x5, Technician Manual

Page: 8 / 46

MicroJ et T rouble-S hooting G uide 3
* T est for ink flow from reservoir. Crimp tubing going into
reservoir from ink container. R emove tubing from inlet side of
filter . Pg. 15, 29 Item 23. Carefully loosen crimp and test for
ink flow (discharge into container and avoid getting ink on
circuit cards). If a weak ink flow or no flow is present, replace
reservoir. See
LOW INK LAMP/RESERVOIR LEAD REMOVAL
procedure. Page 10.
* T est for ink flow from filter: Crimptubing going into reservoir
from ink container. R emove tubing from inlet side or off-center
port of valve, item #3a, page 29. Carefully loosen crimp and
test for flow (discharge into container and avoid getting ink on
circuit cards). If a weak flow or no flow is present replace filter.
Head:
D) Heavy printing
* Check dot size setting (<SIZE > key). L ower if needed.
* Check incoming voltage from transformer. V oltage between
pins 1 and 2 on transformer connector should be approximately
20 volts A C (see figure 5 on electrical testing diagram page
13).
* Purge to remove air.
* Check individual valve adjustment (<ME NU> then
6
). L ower
if needed.
* T est pump pressure (2.0-3.0 psi) if higher, adjust. See
A IR
PUMP PRESSURE ADJUSTMENT
procedure. Page 10.
Head: E ) W eak print/output
* Check dot size; increase as needed.
* Check purge output; all nozzles to give a 2
"
stream or
greater.
* If weak printing continues, go to letter “C” testing.
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