JVC P-100EUC - Page 4

P-100EUC
4.
Tuning
Base
Removal
1.
Remove
the
Bottom
Board
and
the
top
panel.
2.
Unscrew
2
screws
indicated
in
Fig.
5
(one
between
the
2
screws
is
situated
under
the
shade
sheet.)
3.
Remove
an
eyelet
fastened
the
printed
circuit
board
for
TV
from
the
reverse
side
of
the
board.
(Fig.
6)
Shade
Tuning Base
Fig. 5
Tuning Base
Fig. 6
5.
TV
Printed
Circuit
Board
Removal
1.
After
removing
the
tuning
base,
pull
out
TV/Radio
selector
and
VHF/UHF
selector
knobs.
2.
Unscrew
a
screw
indicated
in
Fig.
7,
so
that
the
TV
printed
circuit
board
is
separated
from
the
radio
printed
circuit
board.
Printed Board
for Radio
Printed
Board
for
TV
Fig. 7
No. 3308
6. Radio Printed
| Circuit Board Removal from
Radio Tuning Base
1.
When
removing
Radio
printed
circuit
board
from
Radio
tuning
base,
unfit
dial
cord
and
remove
both
end
of
radio
bar
antenna
from
antenna
supporter
by
gouging
out
between
the
supporter
and
the
bar
antenna
with
a
(-)
screw-driver.
2. Unscrew 2 screws indicated in Fig. 8.
Radio Tuning Base
Fig. 8
Alignment Instructions
For TV.
1. B Voltage Adjustment
1.
Supply
D.C.
6V
to
P5
(DC
6V
Input
terminal)
2.
Adjust
R503
until
4.5
volts
are
obtained
at
TP-52
(collector
of
X501)
while
receiving
TV.
*
Confirm
that
the
TV
screen
size
is
not
changed
by
variation
of
D.C.
Input
voltage
from
4.8
to
6.5
volts.
2. PIX IF Alignment
Test Equipments
1. Sweep generator with markers
Sweep frequency range 30 ~ 50MHz
Marker
frequency
33.4,
34.7,
_40.4MHz |
2. Oscilloscope
3. Power source
DC 4.5V and 0.7V for A.G.C.
Preparations before Alignment ;
1.-Connect
the
capacitor
and
resistor
(1000pF
&
5602)
in
series
between
TP-11
and
output
of
the
sweep
generator.
.
.
Connect
the
capacitor
and
resistor
(1uF
&
10kQ)
in
series
between
TP-12
and
input
of
the
oscilloscope.
.
Supply
DC
0.7V
for
A.G.C.
to
TP-14
and
DC
4.5V
to
TP-52.
36.8, 38.9,