Page
6-1
SERVICE
PROCEDURES
SYMPTOMS
AND
CHECKS
The following list of symptoms
and
checks provides
you
with
some problems you may encounter,
and
the most probable areas to check.
SYMPTOM
Monitor completely
dead.
(no
power
to
LED)
Hum
bars
in
display.
No
raster.
No
high
voltage.
No
horizontal
sync.
No
vertical
sync.
This list is not intended to be inclusive of all the
problems you may encounter,
but
rather to provide
you with a systematic approach to diagnosing the
problem.
If
you encounter a problem
not
listed
in
this chart, analyze where the problem is located by
the way the circuits relate to each other.
AREA
TO
CHECK
•
Line
cord
and
power source.
•
Fuse
FX201
or
FX701.
•
Transformer
TX201.
•
SWitch
SX201
or wiring at switch.
•
Shorted
diode, CR701-CR704.
•
Q701-o703, or associated circuitry.
•
LED
open.
•
CX707.
•
R707
and
R706
interchanged.
•
CR701-CR704,
one
open.
•
CR706.
•
Black
Level
or Contrast control turned
down.
•
CRT
or
CRT
socket.
•
0201,Q807.
•
RX711
open.
•
Q501
or
0502.
•
Horizontal yoke winding.
•
TX502.
•
CR507,
CR508,
CR502, CR503.
•
IC501.
•
R502,R503.
•
Horizontal Hold control.
•
C601,
R602, R603.
•
Adjust
Vertical Hold control.
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