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SERVICE
CONTROL
ADJUSTMENTS
TU-AGC
ADJUSTMENT
j~Tune
the
receiver
to
the
clearest
station.
2.
Rotate
VR175
fully
counter-clockwise
and
then
clockwise
slowly
until
the
snow
noise
just
disappears.
HORIZONTAL
OSCILLATION
ADJUSTMENT
1.
Tune
the
receiver
to
the
PAL
circular
pattern,
2.
Connect
the
short
clip
between
test
points
"TP-4A"
and
"TP-4E".
3.
Adjust
VR411
so
that
the
picture
comes
to
the
standstill.
Fig.8
PAL
circular
pattern
PAL
COLOUR
ADJUSTMENTS
[ CW
OSC
ADJUSTMENT]
1.
2.
3.
4.
Tune
the
receiver
to
bar
pattern.
Set
brightness
and
to
the
normal.
Short
clip
m
the
PAL
colour
colour
controls
Connect
the
short
clip
between
test
points
"TP-2D"
and
"TP-2E".
Adjust
VC236
to
obtain
colour
synchronized
picture.
Fig.9
PAL
colour
bar
pattern
Uvrm
I_mwr
[ lH
DELAY
ADJUSTMENT]
3.
Connect
the
oscilloscope
to
test
points
(+)
"TP-2B"
and
(-)
"TP-2E".
4.
By
using
T220,
adjust
the
amplitude
at
"a"
to
the
minimum.
Fig.10
—
[ COLOUR
PHASE
ADJUSTMENT)
3.
Connect
the
oscilloscope
to
test
points
(+)
"TP-2B"
and
(-)
"TP-2E".
4.
By
using
VR220,
adjust
the
amplitude
"b"
to
the
minimum.
Fig,ll
b
AUDIO
OUTPUT
ADJUSTMENT
[FM
OUTPUT
ADJUSTMENT]
1.
Tune
the
receiver
to
the
FM
signal.
*
Modulation
frequency
is
400Hz
or
1 kHz.
* A:
FM
80%
modulation.
B:
FM
60%
modulation.
2.
Connect
the
digital
V-meter
to
1
pin
or
3 pin
on
SCART.
3.
By
using
VR1C8,
adjust
the
amplitude
-
to
A:
500*20
mVrms.
B:
350~10
mVrms.
Fig.12
[ STEREO
PILOT
ADJUSTMENT]
1.
Tune
the
receiver
to
the
FM
signal.
(400Hz
& lKHz
Dual)
2.
Connect
the
oscilloscope
to
19
pin
of
IC801.
3.
By
using
T801,
adjust
the
amplitude
to
be
maximum.
[ SEPARATION
ADJUSTMENT]
1.
Tune
the
receiver
to
the
FM
signal,
(400
Hz)
2.
Connect
the
digital
V-meter
to
3
pin
on
SCART.
3.
By
using
VR1E3,
adjust
the
amplitude
to
be
minimum.
–9–
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