CFD-S05 (serv.man2) - Sony Audio Service Manual (repair manual). Page 11

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CFD-S05
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

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