Sharp VC-90ET

VC-SOET
ADJUSTMENT
OF
THE
ELECTRICAL
CIRCUITRY
Prior to the adjustment:
In
most
cases,
necessity
for
electrical
circuits
will
If
the
equipment
fails
electrically,
locate
a
defect
arise
from
replacement
of
mechanical
parts
or
defects
first
of
all
using
instruments.
Then
repair
including
the
video
head.
Before
starting
or
replace
parts
and
make
adjustment
by
the
adjustment
of
electrical
circuits,
check
that
procedures
described
below.
mechanical
operation
of
the
equipment
is
When
required
instruments
are
not
available,
do
complete
(the
mechanism
are
adjusted
not
move
controls
indiscriminately.
completely).
®
Instruments
®
Colour
monitor
TV
@
Oscilloscope
@Colour
bar
generator
@
Frequency
counter
@
DC
regulated
power
supply
@Audio
generator
@Alignmenttape
@
Blank
video
tape(VHS)
e@VIVM
ADJUSTMENT
OF
SYSTEM
CONTROL
/
SERVO
CIRCUIT
@ Test points layout
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RUNTKO636GE
Figure 2-1 .SYSTEM / SERVO PWB
32