Read Sony CFS-1055 Service Manual online
– 7 –
Record/Playback Head Azimuth Adjustment
Procedure :
1. Mode : playback
Procedure :
1. Mode : playback
VTVM
32
Ω
phones jack
set
test tape
P-4-A063
(6.3kHz, -10dB)
P-4-A063
(6.3kHz, -10dB)
L
R
Tape Speed Adjustment
Procedure :
Procedure :
Mode : playback
speed checker
LFM-30 or
digital frequency
counter
LFM-30 or
digital frequency
counter
32
Ω
set
test tape
WS-48B
(3kHz, 0dB)
WS-48B
(3kHz, 0dB)
phones jack
Adjustment Values :
Speed checker
Digital frequency counter
±
3%
2,910 to 3,090Hz
Adjustment Location :
2. Turn the adjustment screw for the maximum output levels. If these
levels do not match, turn the adjustment screw until both of output
levels match together within 3dB.
levels match together within 3dB.
L-CH
peak
peak
R-CH
peak
peak
screw position
within
3dB
3dB
within
3dB
3dB
L-CH
peak
peak
R-CH
peak
peak
screw
position
position
Phase Check
Mode : playback
Mode : playback
VTVM
32
Ω
L-CH
32
Ω
R-CH
set
L
+
–
–
+ R
Phones jack
in phase
45
°
90
°
135
°
180
°
wrong
good
3. After the adjustment, lock the screws with locking compound.
Adjustment Location :
adjustment screw
output
level
level
screen patten
tape speed adjustment
control inside motor
control inside motor
Frequency difference between the begining and the end of the
tape should be within 1 % (30Hz).
tape should be within 1 % (30Hz).
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