Sony CFM-S1 Service Manual ▷ View online
7
CFM-S1
SW Section
BAND switch
: SW1, SW2
FINE TUNING control
: mechanical center
FM Section
Function switch : FM
Volume
Volume
: MIN
Tape Speed Adjustment
Procedure :
Mode : Playback
Procedure :
Mode : Playback
Adjustment Value :3,000Hz
Standard Value
Standard Value
:2,990 to 3,010Hz
set
test tape
WS-48B
(3kHz, 0dB)
WS-48B
(3kHz, 0dB)
8
Ω
digital frequency
counter
counter
J101 (Earphone jack)
+
Frequency difference between the beginning and the end of the tape
should be within 1.0% (30Hz).
should be within 1.0% (30Hz).
Adjustment Location :
tape speed adjustment
control inside motor
control inside motor
AM RF signal
generator
generator
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
signal.
Output level : as low as possible
Put the lead-wire
antenna close to
the set.
antenna close to
the set.
set
8
Ω
+
J101 (Earphone jack)
level meter
AM RF signal
generator
generator
30% amplitude
modulation by 400Hz signal
output level : as low as possible
modulation by 400Hz signal
output level : as low as possible
telescopic
antenna
terminal
antenna
terminal
12pF
set
8
Ω
+
J101 (Earphone jack)
level meter
FM RF signal
generator
generator
22.5kHz frequency deviation by
400Hz signal.
Output level : as low as possible
400Hz signal.
Output level : as low as possible
telescopic
antenna
terminal
antenna
terminal
0.01 F
µ
TUNER SECTION
MW Section
Function switch : MW
Volume
Volume
: MIN
set
8
Ω
+
J101 (Earphone jack)
level meter
0dB=1
µ
V
8
CFM-S1
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
done by the trimmer capacitors.
AM(MW/SW) IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1
455kHz
MW FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L4
520kHz <516kHz>
CT4
1,680kHz <1,630kHz>
MW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3
600kHz
CT3
1,400kHz
SW1 FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L7
2.2MHz
CT7
7.3MHz
SW1 TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L6
2.2MHz
CT6
7.3MHz
SW2 FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L9
6.8MHz
CT9
22.5MHz
SW2 TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L8
6.8MHz
CT8
22.5MHz
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L2
86.50MHz <87.35MHz>
CT2
109.50MHz <107.80MHz>
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1
86.50MHz <87.35MHz>
CT1
109.50MHz <107.80MHz>
< > : Saudi Arabia model
[MAIN BOARD]
(Component side)
(Component side)
CT1 : FM Tracking Adjustment
CT3 : MW Tracking Adjustment
CT6 : SW1 Tracking Adjustment
L6 : SW1 Tracking Adjustment
L3: MW Tracking Adjustment
T1 : AM (MW/SW) IF Adjustment
L5 : FM IF Adjustment
L2 : FM Frequency
Coverage Adjustment
Coverage Adjustment
CT4: MW Frequency
Coverage Adjustment
Coverage Adjustment
CT2 : FM Frequency
Coverage Adjustment
Coverage Adjustment
L4 : MW Frequency
Coverage Adjustment
Coverage Adjustment
CT7 : SW1 Frequency
Coverage Adjustment
Coverage Adjustment
L7 : SW1 Frequency
Coverage Adjustment
Coverage Adjustment
CT8 : SW2 Tracking Adjustment
L8 : SW2 Tracking Adjustment
CT9 : SW2 Frequency
Coverage Adjustment
Coverage Adjustment
L9 : SW2 Frequency
Coverage Adjustment
Coverage Adjustment
L1 : FM Tracking Adjustment
Adjustment Location : MAIN board (Component side)
FM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
L5
10.7MHz
9
9
9
9
CFM-S1
• Circuit Board Location.
SECTION 4
DIAGRAMS
Battery terminal board
Jack board
Main board
Power board
Fine tune board
10
10
CFM-S1
4-1. BLOCK DIAGRAMS
• Signal path.
F
: FM
E
: PB
a
: REC
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