Read Sony CFD-G30 / CFD-G50 Service Manual online
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SECTION 4
ADJUSTMENTS
Torque Meter
CQ-403A
Meter Reading
more than 60 g
(more than 2.12 oz)
4-2.
ELECTRICAL ADJUSTMENT
Standard output level
Test tape
Tape Speed Adjustment
Procedure :
Mode : Playback
Mode : Playback
Adjustment Value : normal tape speed
Adjust the tape speed adjustment control inside motor, so that the
frequency counter reading becomes 3,000 Hz.
Adjust the tape speed adjustment control inside motor, so that the
frequency counter reading becomes 3,000 Hz.
Specification Value :
Frequency difference between the beginning and the end of the
tape should be within 1.5% (45 Hz).
tape should be within 1.5% (45 Hz).
Adjustment Location :
HP OUT
32
Ω
0.25 V (–10 dB)
Output
Load impedance
Output signal level
Test Tape
WS-48A
Used for
Tape speed adjustment
Signal
3 kHz, 0 dB
4-1.
MECHANICAL ADJUSTMENT
PRECAUTION
1.
Clean the following parts with a denatured-alchool-moistened
swab:
swab:
record/playback head
pinch roller
erase head
rubber belts
capstans
2.
Demagnetize the record/playback head with a head
demagnetizer. (Do not bring the head demagnetizer close to
the erase head.)
demagnetizer. (Do not bring the head demagnetizer close to
the erase head.)
Torque Measurement
Tape Tension Measurement
Meter Reading
18 – 60 g
•
cm
(0.25 – 0.83 oz
•
inch)
1.0 – 5.0 g
•
cm
(0.014 – 0.069 oz
•
inch)
45 – 95 g
•
cm
(0.62 – 1.32 oz
•
inch)
45 – 95 g
•
cm
(0.62 – 1.32 oz
•
inch)
Mode
FWD
FWD
back tension
Fast Forward
Rewind
Torque Meter
CQ-102C
CQ-201B
0dB = 0.775V
TAPE RECODER SECTION
Tape speed adjustment
control inside motor
control inside motor
32
Ω
test tape
WS-48A
(3kHz, 0dB)
WS-48A
(3kHz, 0dB)
set
digital frequency
counter
counter
J391 (phones)
+
–
Digital frequency counter
2,910 – 3,090Hz
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