Sony CFD-EX35L Service Manual ▷ View online
11
CFD-EX35L
3-12. MAIN Board- 2
5
MAIN board
CNP374
CNP353
chassis (CD)
L-R/REG board
1
from TUNER board CNP1
2
from HEADPHONE board CNP391
3
from HEADPHONE board CNP393
4
from POWER board CNP903
PDW board
3-13. Mechanism Deck Section (MF-V5-117)
4
t
hree screws
+BVTP 3
×
10
1
f
lexible flat cable
(from MAIN board CNP805)
5
m
echanism deck section
(MF-V5-117)
3
TC board
2
s
crew
+PTT 2
×
6
12
CFD-EX35L
3-14. CD Block Section (KSM-213RDP)
3-15. PDW, L-R/REG Board
5
three
screws
+BVTP 3
×
10
1
s
crew
+BVTP 3
×
10
3
t
wo screws
+BVTP 3
×
10
6
PDW board,
Chassis (HS, R)
4
L-R/REG board,
Chassis (HS, L)
2
clamp
5
CD board
4
f
lexible flat cable
CNP701
2
Remove solderings
from the four points.
1
f
lexible flat cable
(from MAIN board CNP802)
7
CD block section
(KSM-213RDP)
6
f
our screws
2.6
×
10 (DIA, 10),+WH
3
screw
+P2
×
6
13
CFD-EX35L
4-1. Mechanical Adjustments
PRECAUTION
1.
Clean the following parts with a denatured-alcohol-moistened
swab :
swab :
record/playback head
pinch roller
erase head
rubber belts
capstan
2.
Demagnetize the record/playback head with a head demagne-
tizer. (Do not bring the head demagnetizer close to the erase
head.)
tizer. (Do not bring the head demagnetizer 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
supply voltage (9V) unless otherwise noted.
supply voltage (9V) unless otherwise noted.
Torque Measurement
Torque
Torque Meter
Meter Reading
1.77 – 5.88 mN•m
Forward
CQ-102C
(18 – 60 g•cm)
(0.25 – 0.83 oz•inch)
Forward
0.1 – 0.49 mN•m
Back Tension
CQ-102C
(1.0 – 5.0 g•cm)
(0.014 – 0.069 oz•inch)
4.42 – 9.31 mN•m
Fast Forward
CQ-201B
(45 – 95 g•cm)
(0.62 – 1.32 oz•inch)
4.42 – 9.31 mN•m
Rewind
CQ-201B
(45 – 95 g•cm)
(0.62 – 1.32 oz•inch)
Tape Tension Measurement
Torque Meter
Meter Reading
CQ-403A
more than 60g
(more than 2.12 oz)
SECTION 4
ADJUSTMENTS
4-2. Electrical Adjustments
TAPE SECTION
Standard Output Level
Output terminal
HP OUT
load impedance
32
Ω
output signal level
0.25V (–10dB)
Test Tape
Type
Signal
Used for
WS-48A
3kHz, 0dB
Tape Speed Adjustment
Tape Speed Adjustment
Procedure :
Mode : Playback
Adjustment so than the value on the digital frequency counter is
3,000 Hz.
3,000 Hz.
Adjustment Value : 3,000Hz
Standard Value : 2,940 - 3,060Hz
Standard Value : 2,940 - 3,060Hz
Frequency difference between the beginning and the end of the tape
should be within 1.5% (45Hz).
should be within 1.5% (45Hz).
set
test tape
WS-48A
(3kHz, 0dB)
WS-48A
(3kHz, 0dB)
32
Ω
digital frequency
counter
counter
J391
(
i
)
Tape speed adjustment
control inside motor
control inside motor
0dB = 0.775V
Adjustment Location : Mechanism deck
14
CFD-EX35L
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1
450 kHz
MW FREQUENCY COVERAGE ADJUSTMENT
Frequency Display
531 kHz
1,611 kHz
Reading on Digital voltmeter
0.9 ± 0.5 V
5.2 ± 0.6 V
Adjustment Part
<confirmation>
<confirmation>
MW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3-1
CT3
621 kHz
1,404 kHz
LW FREQUENCY COVERAGE ADJUSTMENT
Frequency Display
153 kHz
279 kHz
Reading on Digital voltmeter
0.6 ± 0.3 V
5.0 ± 0.15 V
Adjustment Part
L4
<confirmation>
LW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3-2
CT5
162 kHz
261 kHz
FM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T2
10.7 MHz
FM FREQUENCY COVERAGE ADJUSTMENT
Frequency Display
87.5 MHz
108 MHz
Reading on Digital voltmeter
1.3 ± 0.4 V
3.0 ± 0.3 V
Adjustment Part
<confirmation>
L2
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1
CT1
87.5 MHz
108 MHz
Adjustment Location : TUNER board (See page 16)
• 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.
TUNER SECTION
AM (MW/LW) Section
RADIO BAND : AM (MW or LW)
FM Section
RADIO BAND : FM
• Connecting Level Meter (FM and AM)
• Connecting Digital Voltmeter (FM and AM)
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.
FM RF signal
generator
generator
33.75kHz frequency deviation by
1kHz signal.
Output level : as low as possible
1kHz signal.
Output level : as low as possible
telescopic
antenna
terminal
antenna
terminal
0.01
µ
F
0dB = 1
µV
digital
voltmeter
voltmeter
100 k
Ω
TP CV
J391
(
i
)
set
32
Ω
level meter
(range: 0.5–5 V ac)
(range: 0.5–5 V ac)
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