JVC P-100EUC - Page 6

No. 3308
P100-EUC
5.
TV
Channel
Indicator
Adjustment
5-1
VHF
channel
adjustment
1.
Set
the
white
point
of
TV
indicator
to
“4”
figure
of
TV
indicator
plate.
2.
Receive
4CH
broadcasting
program
by
adjusting
R28.
3.
Set
the
white
point
of
TV
indicator
to
“5”
figure
of
TV
indicator
plate.
4.
Receive
5CH
broadcasting
program
by
adjusting
R29.
5.
Set
the
white
point
of
TV
indicator
to
12”
figure
of
TV
indicator
plate.
6.
Receive
12CH
broadcasting
program
by
adjusting
R27.
5-2
UHF
channel
adjustment
1.
Set
the
Red
point
of
TV
indicator
to
your
local
UHF
channel
number.
;
2.
Receive
your
local
UHF
broadcasting
program
abovementioned
by
adjusting
R26.
6.
V.
Hold
and
H.
Hold
Adjustment
6-1 V. Hold adjustment
Make
ground
of
TP-7
or
TP-14
and
connect
a
frequency
counter
to
TP-31.
Adjust
V.
Hold
control
(R313)
so
that
the
frequency
counter
indicates
45Hz.
6-2 H. Hold adjustment
Make
ground
of
TP-7
or
TP-14
and
connect
a
frequency
counter
to
TP-41.
Adjust:
H.
Hold
control
L401
so
that
the
frequency
counter
indicates
15.625kHz#3Hz.
Alignment
Instructions
For
Radio
AM IF Alignment
Test Equipment
1.
Sweep
generator
with
markers
Marker
frequencies:
445,
455,
465kHz
2.
Oscilloscope
3.
Power
supply
DC
6V
Preparations
before
Alignment
1.
Set
the
TV-Radio
selector
to
Radio
position
and
the
Radio
Band
selector
to
AM
position.
2.
Set
the
Radio
tuning
knob
(variable
capacitor)
to
near
the
minimum
capacity
where
no
signal
comes
in.
3.
Connect
output
of
the
sweep
generator
to
TP-802.
4.
Connect
a
capacitor
(14F)
between
TP-803
and
input
of
the
oscilloscope.
5.
Supply
DC
6V
to
P6.
IF Alignment
Align the wave center to 455kHz and for symmetrize “A”
and
“B”
shown
in
below
and
also
for
maximum
gain
with
T804.
IC Bias Alignment
Align IC Bias contro! (R835) to obtain maximum gain.
FM IF Alignment
Test Equipment
1.
Sweep
generator
with
markers
Marker
frequencies
10.55,
10.625,
10.7,
10.775,
10.85MHz
2. Oscilloscope
3. Power supply DC 6V
Preparation
before
Alignment
1.
Set
the
Radio
Band
selector
to
FM
position.
2.
Set
the
Radio
Tuning
Knob
(variable
capacitor)
to
near
the
minimum
capacity
where
no
signal
comes
in.
3.
Connect
a
capacitor
and
a
resistor
(33pF
&
33kQ)
in
series
between
TP-801
and
outputof
the
sweep
generator.
4.
Connect
a
capacitor
and
a
resistor
(1uF
&
100k&)
in
series
between
TP-803
and
input
of
the
oscilloscope.
5. Supply DC 6V to P6.
Alignment procedures
1.
Keep
output
of
sweep
generator
within
suppressing
limiter
on
center
of
wave
form.
2.
Align
the
wave
center
to
10.7MHz
with
T808
as
indicated
in
Fig.
12.
3.
Align
T801,
T805
and
T807
to
obtain
maximum
gain
and
also
for
symmetrize
on
S
curve
characteristics.
4.
Align
IC
Bias
Control
(R835)
to
obtain
maximum
gain.
10.7MHz
Fig. 12
AM RF Alignment
Test Equipment
Sweep generator with markers
Marker frequency: 520, 620, 1400, 1650kHz
V.T.V.M.
Test loop Antenna
Power supply DC 6V