JVC PC-5 L User Manual

5. Tuner Alignment
BASIC CONDITIONS
POWER
SOURCE
OF
THE
RECEIVER
|
DC
12
V,
AC240/220/1
10V,
60/60
He.
LOAD
RESISTANCE
OF
THE
RECEIVER
50
mW
(0.4
V)/3.2
Q.
400 Hz. 30%
Description
1. AW IF ALIGNMENT
1-1 Conditions of the receiver.
(1) Power source:
DC 12V.
(When
the
power
is
supplied
directly
to
the
tuner
in
the
receiver,
the
voltage
should
be
adjusted
to
the
proper
level
which
shall
be
required
by
the tuner.)
TUNER
MW
Minimum gain position
Center (Bass, Treble) position
Near the minimum capacity position where no signal come in.
(2) Function switch position:
(3) Band select switch:
(4) Volume control:
(5) Tone control:
(6) Variable capacitor:
1-2. Connection of Sweeper and the receiver
(1) Tuner input:
Tuner output:
Positive side to TP-6
Positive side to TP-11
Negative side to TP-15
T4,T5
Adjust
MW
I.F.T.
(above
mentioned
aligning
position)
so
tht
maximum
and
symmetrical
wave
form
can
be
obtained.
In
this
case,
the
wavehead
should
be
appeared
at
the
center
marker
(455
kHz)
on
the
scope
of
Sweeper.
1-3. Aligning position:
Alignment (Waveform):
2. FM IF ALIGNMENT
2-1 Conditions of the receiver
(1) Power source:
(2) Function switch position:
(3) Band select switch:
(4) Volume control:
(5) Tone control:
(6) Variable capacitor:
2-2. Connection of Sweeper and the receiver
(1) Tuner input:
(2) Tuner output:
Same as mentioned in item 1-1
TUNER
FM
Minimum gain position
Center (Bass, Treble) position
Near the minimum capacity position where no signal come in.
Positive side to TP-3.
Positive side to TP-16.
Negative side to TP-15.
NOTE
a)
Attach
a
capacitor
(30
pF)
and
a
resistor
(30
k&2)
in
series
to
the
positive
side
cable
which
shall
be
led
from
Sweeper
input.
b)
Attach
a
capacitor
(30
pF)
and
a
resistor
(100
k&2)
in
series
to
the
positive
side
cable
which
shall
be
led
from
Sweeper
output.
2-3
Aligning
position:
a)
IF
Waveform:
T1
b) Discriminate Waveform: T3
(“S" curve waveform)
Adjust
the
discriminate
coil
(T3)
so
that
“S"
curve
waveform
may
be
changed to IF waveform as shown in following figure.
2-4 Alignment (Waveform):
>»
Fig. 49
After
above,
adjust
T1
so
that
max.
sensitivity
and
symmetrical
IF
wave-
form
can
be
obtained
on
the
scope
of Sweeper.
Adjust
the
discriminate
T3
again
so
that
above
symmetrical
IF
wave-
form
may
be
changed
to
balanced
“’S’’
curve
waveform.
b) Discriminate Waveform:
3. MW RF ALIGNMENT
3-1 Conditions of the receiver.
(1) Power source:
(2) Function switch position:
(3) Volume control:
(4) Tone control:
(5) Variable capacitor:
3-2. Conditions of SSG.
(1) Modulation:
(2) Frequency:
(3) Output level of the attenuator in SSG:
Refer the following list shown in item 3-4.
3-3. Power output measuring position:
3-4 — Alignment:
Approx. 50mW
Band
Select
Sort
of
Antenna
to
be
F
:
me
aaa
ae
attached
to
SSG
Variable
Capacitor
Position
Aligning
Position
Speaker terminals
145
kHz
L8
360 kHz TCs
Adjust
the
above
aligning
position
(L8
&
TC-8)
repeatedly
so
that
the
tuner
LW
Loop
Antenna
can
be
received
above
frequency
range
(band
width).
160
kHz
to
be
received
160
kHz
L5
350
kHz
to
be
received
350
kHz
TC-5
Adjust
the
above
aligning
position
(L5
&
TC-5)
repeatedly
so
that
the
tuner
Same as mentioned in item 1-1.
TUNER
50 mw
Center (Bass, Treble) position
Refer the following list shown in item 3-4.
Refer the basic condition
Frequency of SSG
can be obtained the best sensitivity.
—~25—-—
| PC-5 L/LB
Variable Capacitor Position Aligning Position
Band Select Sort of Antenna to be
Max. capacity 7
Min. capacity TC-7
Adi ani sin :
Mw
eekiaie.
|
eee
eee
620 kHz to be received 620 kHz
11
1,400
kHz
to
be
received
1,400
kHz
TC-4
Adjust
the
above
aligning
position
(L4
&
TC-4)
repeatedly
so
that
the
tuner
can be obtained the best sensitivity.
me
Max.
capacity
L9
;
14
Min.
capacity
|
18
sw
Dummy
Adjust
the
above
aligning
position
(LO
&
TC-9)
repeatedly
so
that
the
tuner
Antenna
can
be
received
above
frequency
range
(band
width).
|
16
|
6.0
MHz
to
be
received
6.0
MHz
L6
to be received 18 MHz TC-6
|
18
|
Adjust
the
above
aligning
position
(L6
&
TC-6)
repeatedly
so
that
the
tuner
can be obtained the best sensitivity.
Item
Description
4.
FM
RF
ALIGNMENT
4-1 Conditions of the receiver
(1) Power source:
r
1
4
o ©
Same as mentioned in item 1-1.
(2)
Function
switch
position:
TUNER
(3)
Band
select
switch:
FM
(4)
Volume
control:
50
mw
Center (Bass, Treble) position
Refer the following list shown in item 4-3
(5) Tone control:
(6) Variable Capacitor:
4-2 Condition of FM SSG
(1) Modulation:
(2) Frequency:
Output level of the attenuator in FM SSG:
Refer the basic condition
Refer the following list shown in item 4-3.
The
level
shall
be
decided
by
the
load
resistance
of
the
receiver
mentioned
in the basic conditions.
Alignment:
Aligning Position
Band
Select
Sort
of
Antenna
to
be
eb
attached
to
SSG
Frequency
of
FM
SSG
Variable
Capacitor
Position
875 Mz
[T0909
wHz
[|
—*Mincapacity
|
TCS
EM
Dummy
Adjust
the
above
aligning
position
(L3
&
TC-3)
repeatedly
so
that
the
tuner
Antenna
can
be
received
above
frequency
range
(band
width).
to be received 90 MHz L1,2
to be received 106 MHz TC-1,2
Adjust
the
above
aligning
position
(L1,
2
&
TC-1,
2)
repeatedly
so
that
the
tuner can be obtained the best sensitivity.
FM MPX Alignment
A. 19 kHz Alignment (Regular Method)
1. Connect a frequency counter to the test point TP17
(earth = TP15).
2. Supply the monaural signal (98 MHz, 60 dB) across
the test points TP1 and TP2.
3. Adjust the variable resistor VR1 so that the fre-
quency becomes 19 kHz + 100 Hz.
B. 19 kHz Alignment (Simplified Method)
1. Tune to an FM stereo broadcast.
2. Set the variable resistor VR2 to the minimum posi-
tion of the range in where the Lch and Rch selecting.
Parts
Arrangement
for
Alignment
Dummy
Antenna
MUTING ON/OFF
STEREO /MONO
iS SW1_AM__FM
R1+R2=800
C= 10 pF
R1: Output impedance of S.S.G.
Fig. 50
No. 1443

JVC PC-5 L Specifications

General

Brand	JVC
Model	PC-5 L
Category	Stereo System
Language	English