0
ADJUSTMENT
TUNER SECTION
fL:
Low-range frequency
fH:
High range frequency
. FM IF/RF
As for adjusting method refer to the relevant explanation
in Service Manual “ADJUSTMENT PROCEDURES OF AU-
DIO PRODUCTS”.
Test Stage
MECHANISM
SECTION
-
Driving Force check
Torque Meter
Specified value
Plav:
TW-2412
I
Over 50 a
IF
Detection
Band coverage
87.1 MHz
fL:
(JC-129/130)
87.3 MHz
fL:
(J’S1
30H)
108.8 MHz
fH:
(JC-129/130)
108.3 MHz
fH:
(JC-130H1
Input:
TPl
Output: Headphones
Socket (load resis-
tance: 32
ohms)
. Torque Check
Torque Meter
Play: TW-21
11
Fast forward: TW-2231
Specified value
27
to 43 g.cm
Over 60 a.cm
TC2
TC2
I
. Head Azimuth
Tracking
88.0 MHz:
Ll
108.0 MHz:
TCI
.
X0
Frequency
Test Tape
MTT-113C
Instrument Connection
Headphones socket
(Load resistance: 32 ohms)
. Tape Speed
Frequency
Dial
Adjusting Specified
Instrument
setting
Point
value
Connection
88 MHz
at 88 MHz
VR2
76
kHz
Input: TPl
60 dB
2
100
Hz
Output: TP4
. AM
IF/RF
Test Stage
Specified
value/
lnstrument
Adjusting Point
Connection
IF
460
kHz:
T2,T4
Input: Antenna
output: TP6
Test Tape
Adjusting
Specified
Instrument
Point value
Connection
1
MTT-I-I~
)
VR3
I3900
2
60Hz
1
;-b&;;;ance:
1
1
32
ohms)
Input: Antenna
Output: Headphones
socket
(load
resis-
tance: 32 ohms)
Band coverage
Tracking
fL:
L4
fH:
TC4
600
kHz:
L3
1.400
kHz:
TC3
MAIN
PWB-A
SOCKET
L4
VR2
Figure 6 ADJUSTMENT POINTS
NOTES ON SCHEMATIC DIAGRAM
Resistor:
To differentiate the units of resistors, such symbol as
K
is
used: the symbol
K
means
1000
ohm and the resistor with-
out any symbol is ohm-type resistor.
. Capacitor:
To indicate the unit of capacitor, a symbol
P
is used: this
symbol
P
means micro-micro-farad and the unit of the ca-
pacitor without such a symbol is microfarad. As to electro-
lytic capacitor, the expression “capacitance/withstand
voltage
”
is used.
(CH), (TH), (RH), (UJ): Temperature compensation
The indicated voltage in each section is the one measured
by Digital
Multimeter
between such a section and the chas-
sis with no signal given.
(
1:
FM mode
<
>:
FM ST mode
Marking except for
(
)
<
>:
AM mode
Schematic diagram and Wiring Side of
P.W.Board
for this
model
are subject to change for improvement without prior
notice.
-6-
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