ADJUSTMENT
As for adjusting method refer to the relevant explanation
TUNER
SECTION
in Service Manual “ADJUSTMENT PROCEDURES OF AU-
DIO PRODUCTS”.
fL:
Low-range frequency
fH:
High range frequency
. FM IF/RF
MECHANISM
SECTION
. Driving Force check
Torque Meter
Play: TW-2412
Reverse olav: TW-2422
Specified value
Over 50
g
Over 50
q
. Torque Check
Torque Meter
Play: TW-2111
Specified value
26 to 45 g.cm
Reverse play: TW-2121
Fast forward: TW-2231
=
Head Azimuth
Test Tape
MTT-114
1
26 to 45 g.cm
Over 60 g.cm
Instrument Connection
Headphones socket
. Tape Speed
Test Tape Adjusting Specified
instrument
Point value
Connection
MTT-111
VR3 3,000
+
90 Hz Headphones
socket
Test Stage
IF
Detection
Frequency
cover
Tracking
Specified value/
Adjusting Point
Tl
T3
87.1 MHz fL:
L2
(JC-S57/S58)
87.3 MHz fL:
L2
(JCS58H)
108.8 MHz fH: TC2
(JC-S57/S58)
108.3 MHz fH: TC2
IJCS58H)
88.0 MHz: Ll
108.0 MHz:
TCl
Instrument
Connection
Input: TP3
Output: TP4
Input:
TPl
Output: Headphones
Socket (load
resis-
tance:
32 ohms)
. VCO Frequency
Frequency
1
Dial
setting
88
MHz
at
88
MHz
60
dB
Adjusting
Point
zSr;fied
1
Instrument
Connection
VRI
19
kHz TP6
2
50 Hz
. AM IF/RF
Test Stage
IF
Frequency
cover
Tracking
Specified value/
Adjusting Point
460
kHz:
T2
fL:
L4
fH: TC4
600
kHz:
L3
1,400
kHz:
TC3
Instrument
Connection
Input: Antenna
Output: TP5
Input: Antenna
Output: Headphones
socket
(load
resis-
tance: 32 ohms)
MAIN
PWB-AI
Figure 6 ADJUSTMENT POINTS
NOTES
ON
SCHEMATIC
DIAGRAM
. Resistor:
T
O
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
(ML): Mylar type
.
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. Tuner
(
1:
FM mode
Marking except for
(
1:
AM mode
.
Schematic diagram and Wiring Side of
P.W.Board
for this
model are subject to change for improvement without prior
notice.
(P.P.): Polypropylene type
-6-
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