Read Sony CFD-121 Service Manual online
– 10 –
REC/PB Head Azimuth Adjustment
Procedure :
1. Mode : playback
1. Mode : playback
test tape
P-4-A063
(6.3 kHz, –10 dB)
P-4-A063
(6.3 kHz, –10 dB)
phones jack
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 3 dB.
levels match together within 3 dB.
angle
within
3 dB
3 dB
L-CH
peak
peak
R-CH
peak
peak
within
3 dB
3 dB
Output
level
level
R-CH
peak
peak
screw
position
position
L-CH
peak
peak
3. Phase Check
Mode : playback
test tape
P-4-A063
(6.3 kHz, –10 dB)
P-4-A063
(6.3 kHz, –10 dB)
L-CH
set
R-CH
L-CH
32
32
Ω
oscilloscope
V
H
Screen pattern
in phase
45°
90°
180°
135°
good
wrong
Note :
Finish the screw adjustment with a turn in the clockwise
direction.
After the adjustment, lock the adjustment screw.
direction.
After the adjustment, lock the adjustment screw.
Adjustment Location : record/playback head
VTVM
adjustment
screw
screw
set
32
Ω
phones jack
32
Ω
R-CH
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