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Service Bulletin
Is there more than
More than 1
one machine with
PVS?
a PVS kit?
No
Make sure the coax cable is firmly connected
to the wall outlet and the bottom of the unit.
Also check the internal coax cable in the unit.
Make sure it's firmly attached to both
couplers.
Poor Screen
For Tatung
Color with Poor
screens, reset the
Picture Quality
software in the
(637-1389)
Did picture
quality
improve?
Yes
Result 1
Issue is resolved.
Screen A still has
poor quality and
screen B has good
quality.
Screen A = Poor
Yes
Screen B = Good
No
Result 2
Screen A has
good quality but
screen B has poor
quality.
** Consult with your facility's Audio/Visual expert or your cable/ satellite provider.
Poor Picture Quality on a PVS Screen
Tune other screens to
the same channel to
Yes
see if they have the
same poor quality
picture.
No
Coax is firmly
connected?
Tatung
UTI or Tatung?
screen.
UTI
Bypass the coax
No
cable in the unit.
Use a Known
Swap coax cables
Good Coax
between suspect
Cable Source
(637-1399)
Replace the PVS screen
and return the failed
screen back to Star Trac.
The PVS screen is good.
Replace the coax cable.
Did the picture
It's possible that the coax
quality improve?
cable from the wall to the
unit is the cause.
Issue is resolved.
All have same
Yes
quality picture?
Tighten the connections of
the coax cable. Tighten
No
both the external and
internal coax cable
connectionsin the unit.
Yes
Determining
the Screen
Determine the
Type
screen type.
(637-1397)
Bypassing
the Coax
Cable in the
Unit
(637-1398)
Is a nearby unit
Yes
available?
and good unit.
No
Find another TV or
screen to test the
Yes
feed from the wall.
Is 2
nd
TV
picture quality
good?
No
Issue is with the
No
feed** and not the
PVS
Yes
Issue is with the
feed** and not the
PVS
Did picture
quality
Yes
Issue is resolved.
improve?
No
Replace the coax
cable inside the unit.
Yes
Did picture
quality
improve?
No
If available, find a
nearby unit with
good picture
quality.
Page 2
637-1401 Rev. B
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