Sony CFD-S07CP - ADJUSTMENTS; Mechanical Adjustments; Electrical Adjustments

CFD-S07CP
11
SECTION 3
MECHANICAL ADJUSTMENTS
SECTION 4
ELECTRICAL ADJUSTMENTS
• Standard Output Level
Output terminal HP OUT
load impedance
32 Ω
output signal level 0.25 V (–10 dB)
• Test Tape
Tape Signal Used for
WS-48A 3 kHz, 0 dB tape speed adjustment
P-4-A063 6.3 kHz, –10 dB azimuth adjustment
Tape Speed Adjustment
Procedure:
Mode: playback
i jack (J301)
set
32 :
test tape
WS-48A
(3 kHz, 0 dB)
digital frequency
counter
Adjust so that the value on the digital frequency counter is
3,000 Hz.
Specifi cation 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.
Adjustment Location:
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 demag-
netizer. (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
supply voltage (9 V) unless otherwise noted.
Torque Measurement
Mode Torque meter Meter reading
FWD CQ-102C
2.95 – 6.86 mN • m
(30 to 70 g • cm)
(0.42 – 0.97 oz • inch)
FWD
Back tension
CQ-102C
0.15 – 0.53 mN • m
(1.5 to 5.5 g • cm)
(0.021 – 0.076 oz • inch)
FF CQ-201B
more than 5.88 mN • m
(more than 60 g • cm)
(more than 0.83 oz • inch)
REW CQ-201B
more than 5.88 mN • m
(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)
TAPE SECTION
0 dB = 0.775V
Tape speed adjustment
control inside motor