Sony CFD-515 Service Manual ▷ View online
– 17 –
DIAL POINTER SETTING
Note:
Follow the assembly procedure in the numerical order given.
4
MAIN board
Fig. A
2
pointer
1
Rotate the gear (PVC) fully
in the direction of the arrow.
in the direction of the arrow.
3
Set the pointer
to the position
shown in Fig. A.
to the position
shown in Fig. A.
indicator
– 18 –
SECTION 4
MECHANICAL ADJUSTMENTS
Mode
Torque Meter
Meter Reading
FWD
CQ-102C
27-70 g•cm
(0.38-0.97 oz•inch)
FWD
1.5-5.5 g•cm
Back tension
(0.021-0.07 oz•inch)
55-130 g•cm
FF
CQ-201B
(0.77-1.80 oz•inch)
55-130 g•cm
REW
CQ-201B
(0.77-1.80 oz•inch)
Tape Tension Measurement
Mode
Tension Meter
Meter Reading
FWD
CQ-403A
more than 100 g (3.53 oz)
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened
swab:
record/playback head pinch roller
erase head
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.)
head.)
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to the
4. After the adjustments, apply suitable locking compound to the
parts adjusted.
5. The adjustments should be performed with the rated power sup-
ply voltage unless otherwise noted.
Torque Measurement
SECTION 5
ELECTRICAL ADJUSTMENTS
adjustable resistor
33
Ω
test tape
WS-48B
(3 kHz, 0dB)
WS-48B
(3 kHz, 0dB)
set
phones jack
speed checker
LFM-30 or
digital frequency
counter
LFM-30 or
digital frequency
counter
Speed checker
Digital frequency counter
–1% to +1%
2,970 to 3,030 Hz
Frequency difference between the beginning and the end of the tape
should be within 1% (30 Hz).
should be within 1% (30 Hz).
Adjustment Location:
TAPE DECK SECTION
Standard Output Level
SP OUT
HP OUT
Load impedance
3.2
Ω
33
Ω
Output level
0.775 V (0 dB)
0.25 V (–10 dB)
Test Tape
Type
Signal
Used for
WS-48B
3 kHz, 0 dB
Tape speed adjustment
0 dB=0.775 V
Tape Speed Adjustment
Procedure:
Mode: playback
Mode: playback
Adjustment Values:
M601
– 19 –
• 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.
( ): UK
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on VTVM.
L2
86.5 MHz (87.0 MHz)
CT2
109.5 MHz (108.3 MHz)
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on VTVM.
L1
86.5 MHz (87.0 MHz)
CT1
109.5 MHz (108.3 MHz)
AM IF ADJUSTMENT
Adjust for a maximum reading on VTVM.
CFT1
455 kHz
AM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on VTVM.
L4
520 kHz
CT4
1780 kHz (1680 kHz)
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on VTVM.
L3
620 kHz
CT3
1400 kHz
VCO Adjustment
Procedure:
1. Connect frequency counter to 4 and 7 pins of IC1 as shown
the figure below.
2. Tune the set to 98 MHz.
3. Adjust RV1 for 76 kHz ± 500 Hz reading on the frequency
3. Adjust RV1 for 76 kHz ± 500 Hz reading on the frequency
counter.
[MAIN BOARD] (Conductor Side)
set
telescopic
antenna terminal
(JW7)
antenna terminal
(JW7)
0.01
µ
F
FM RF SSG
Carrier frequency: 98 MHz
Modulation: no modulation
Output level: 0.032 V (90 dB)
Modulation: no modulation
Output level: 0.032 V (90 dB)
+
–
–
1
µ
F
33 k
Ω
frequency counter
+
4
7
TUNER SECTION
[FM]
[AM]
FM RF SSG
0.01
µ
F
22.5 kHz frequency deviation
by 400 Hz signal.
output level: as low as possible
by 400 Hz signal.
output level: as low as possible
telescopic
antenna
terminal
(JW7)
antenna
terminal
(JW7)
AM RF SSG
30% amplitude modulation by
400 Hz signal
output level: as low as possible
400 Hz signal
output level: as low as possible
Put the lead-wire
antenna close to
the set.
antenna close to
the set.
Adjustment Location: MAIN board (See page 20.)
– 20 –
Adjustment Location:
[MAIN BOARD] (Component Side)
RV1: VCO
L2: FM Frequency
Coverage
L3: AM Tracking
CFT1: AM IF
L1: FM Tracking
CT1: FM Tracking
CT3: AM Tracking
CT4: AM Frequency
Coverage
L4: AM Frequency
Coverage
CT2: FM Frequency
Coverage
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