Sony CFD-S350 / CFD-S350L Service Manual ▷ View online
13
CFD-S350/S350L
3-14. MOTOR ASSY (M801), RF BELT
3-13. R/P HEAD (HRP301), ERASE HEAD (HE301), TC BOARD
4
lug
5
two claws
1
R/P head (HRP301)
2
erase head (HE301)
3
screw
(+BVTT 2
x 4)
6
Remove the four solderings.
7
TC board
3
screw
6
screw
7
motor assy (M801)
8
motor bracket
5
RF belt
4
1
screw
(+P (B2.6
))
claw
2
protect chassis
14
CFD-S350/S350L
i
jack (J321)
set
32
Ω
test tape
WS-48A
(3 kHz, 0 dB)
WS-48A
(3 kHz, 0 dB)
digital frequency
counter
counter
TAPE SECTION 0 dB = 0.775 V
• Standard Output Level
Output terminal
HP OUT
load impedance
32
Ω
output signal level
0.25 V (–10 dB)
• Test Tape
Type
Signal
Used for
WS-48A
3 kHz, 0 dB
tape speed adjustment
Tape Speed Adjustment
Procedure:
Mode: playback
Mode: playback
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened
swab :
record/playback head
pinch roller
erase head
rubber belts
capstan
idlers
2. Demagnetize the record/playback head with a head demagne-
tizer. (Do not bring the head magnetizer close to the erase head.)
3. Do not use a magnetized screwdriver for the adjustments.
4. The adjustments should be performed with the rated power
4. The adjustments should be performed with the rated power
supply voltage (9V) unless otherwise noted.
Torque Measurement
Mode
Torque meter
Meter reading
2.95 – 6.86 mN • m
FWD
CQ-102C
(30 – 70 g • cm)
(0.42 – 0.97 oz • inch)
FWD
0.15 – 0.53 mN • m
Back Tension
CQ-102C
(1.5 – 5.5 g • cm)
(0.021 – 0.076 oz • inch)
more than 5.88 mN • m
FF
CQ-201B
(more than 60 g • cm)
(more than 0.83 oz • inch)
more than 5.88 mN • m
REW
CQ-201B
(more than 60 g • cm)
(more than 0.83 oz • inch)
Tape Tension Measurement
Mode
Tension meter
Meter Reading
FWD
CQ-403A
more than 100 g
(more than 3.53 oz)
SECTION 5
ELECTRICAL ADJUSTMENTS
SECTION 4
MECHANICAL ADJUSTMENTS
Adjust so that the value on the digital frequency counter is
3,000 Hz.
3,000 Hz.
Specification Value:
Digital frequency counter
2,910 to 3,090 Hz
Adjust so that the frequency at the beginning and that at the end of
tape winding are between 2,910 to 3,090 Hz.
tape winding are between 2,910 to 3,090 Hz.
Adjustment Location:
Tape speed adjustment
control inside motor
control inside motor
15
CFD-S350/S350L
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter
T1
450 kHz
AM FREQUENCY COVERAGE ADJUSTMENT (CFD-S350)
Adjustment Part
Frequency Display
Reading on Digital Voltmeter
L4
531 kHz
1.0
±
0.05 V
Confirmation
1,611 kHz
4.8
±
0.7 V
AM TRACKING ADJUSTMENT (CFD-S350)
Adjust for a maximum reading on level meter
L3
621 kHz
CT3
1,404 kHz
MW FREQUENCY COVERAGE CONFIRMATION (CFD-S350L)
Frequency Display
Reading on Digital Voltmeter
531 kHz
0.9
±
0.4 V
1,611 kHz
5.2
±
0.5 V
MW TRACKING ADJUSTMENT (CFD-S350L)
Adjust for a maximum reading on level meter
L3-1
621 kHz
CT3
1,404 kHz
LW FREQUENCY COVERAGE ADJUSTMENT (CFD-S350L)
Adjustment Part
Frequency Display
Reading on Digital Voltmeter
Confirmation
153 kHz
0.6
±
0.05 V
L4
279 kHz
5.3
±
0.5 V
LW TRACKING ADJUSTMENT (CFD-S350L)
Adjust for a maximum reading on level meter
L3-2
162 kHz
CT5
261 kHz
FM IF ADJUSTMENT
Adjust for a minimum reading on level meter
T2
10.7 MHz
FM FREQUENCY COVERAGE ADJUSTMENT
Adjustment Part
Frequency Display
Reading on Digital Voltmeter
L2
108 MHz
3.0
±
0.2 V
Confirmation
87.5 MHz
1.3
±
0.3 V
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L1
87.5 MHz
CT1
108 MHz
Adjustment and Connecting Location:
TUNER and MAIN board (See page 16)
TUNER and MAIN board (See page 16)
TUNER SECTION 0 dB = 1
µ
V
[AM]
Setting:
Function: RADIO
Band: AM or MW or LW
Function: RADIO
Band: AM or MW or LW
[FM]
Setting:
Function: RADIO
BAND button: FM
Function: RADIO
BAND button: FM
• Repeat the procedures in each adjustment several times, and the
tracking adjustments should be finally done by the trimmer ca-
pacitors.
pacitors.
• Remove FM antenna in FM adjustment.
AM RF signal
generator
30% amplitude
modulation by
400 Hz signal
Output level:
as low as possible
modulation by
400 Hz signal
Output level:
as low as possible
Put the loop
antenna close to
the set.
antenna close to
the set.
+
–
–
level meter
set
32
Ω
MAIN board
KH301 pin
KH301 pin
2
MAIN board
KH301 pin
KH301 pin
1
FM RF signal
generator
75 kHz frequency
deviation by 1 kHz
signal
Output level:
as low as possible
deviation by 1 kHz
signal
Output level:
as low as possible
+
–
–
level meter
MAIN board
KH301 pin
KH301 pin
2
MAIN board
KH301 pin
KH301 pin
1
set
32
Ω
0.01
µ
F
TUNER board
TP (GND)
TP (GND)
TUNER board
TP-ANT(JW2)
TP-ANT(JW2)
digital voltmeter
TP (CV)
TP (GND)
100 k
Ω
TUNER board
16
CFD-S350/S350L
Adjustment and Connecting Location:
– MAIN BOARD (Conductor Side) –
KH301
4
1
L3
AM TRACKING ADJ
L3-2
LW TRACKING ADJ
L3-1
MW TRACKING ADJ
AM TRACKING ADJ
L3-2
LW TRACKING ADJ
L3-1
MW TRACKING ADJ
CT1
FM FREQUENCY
COVERAGE
ADJ
FM FREQUENCY
COVERAGE
ADJ
L1
FM TRACKNG
ADJ
FM TRACKNG
ADJ
L2
FM FREQUENCY
COVERAGE
ADJ
FM FREQUENCY
COVERAGE
ADJ
L4
AM/MW FREQUENCY COVERAGE
ADJ
AM/MW FREQUENCY COVERAGE
ADJ
T1
AM IF
ADJ
AM IF
ADJ
CT5
LW TRACKING
ADJ
LW TRACKING
ADJ
CT3
AM/MW TRACKING
ADJ
AM/MW TRACKING
ADJ
T2
FM IF
ADJ
FM IF
ADJ
TP-ANT
(JW2)
(JW2)
IC1
– TUNER BOARD (Component Side) –
TP
(GND)
TP
(CV)
TP-ANT
JW2
– TUNER BOARD (Conductor Side) –
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