Sony PMC-222V, Руководство по обслуживанию

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Record/Playback Head Azimuth Adjustment
Procedure:
1.
Mode : Playback
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 1dB.
3. Phase Check
Mode : Playback
Note:
Adjustment must be completed by clockwise turning of
adjustment screw.
After the adjustment, lock the screws with locking
compound.
Adjustment Location : Record/Playback head
•
Remove the cassette door.
32
Ω
test tape
P-4-A063
(6.3kHz, –10dB)
set
+
–
level meter
J303 (phones)
screw position
L-CH
peak
R-CH
peak
R-CH
peak L-CH
peak
Screw
position
output
level
within
1dB
within
1dB
test tape
P-4-A063
(6.3kHz, –10dB)
set
L-CH
32
Ω
32
Ω
R-CH
L-CH
R-CH
J303 (phones)
oscilloscope
V H
screen pattern
in phase
45
°
90
°
135
°
180
°
good wrong