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Record/Playback Head Azimuth Adjustment
Procedure:
1. Mode: REV playback
test tape
P-4-A100
(10 kHz, – 10 dB)
set
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 1 dB.
within
L-CH
1dB
peak
output
level
R-CH
peak
Screw
position
L-CH peak
3. Phase Check
Mode: REV playback
test tape
P-4-A100
(10 kHz, –10 dB)
L-CH
set
R-CH
in phase 45 °
Good
4. Set in the FWD mode and repeat the step 1 to 3.
5. After the adjustment, lock the screw with locking compound.
Adjustment Location: Record/Playback head
FWD side
Adjustment screw
level meter
47 k Ω
+
–
LINE OUT
within
1dB
angle
R-CH peak
oscilloscope
47 k Ω
V
H
+
47 k Ω
+
–
–
LINE OUT
Screen pattern
90 ° 135 ° 180 °
Wrong
REV side
Tape Speed Adjustment
Procedure:
Mode: FWD playback
test tape
WS-48B
(3 kHz, 0 dB)
set
1. Set to FWD playback mode.
2. Adjust Variable resistor on the motor (M902) so that the fre-
quency counter reading becomes
3,000 ± 90 Hz.
3. Confirm that the deviation between tape top and tape end is
within 3%.
Adjustment Location: CAPSTAN/REEL motor (M902)
adjustable resistor
Sample Value of Wow and flutter: 0.3% or less W. RMS
– 11 –
frequency counter
47 k Ω
+
–
LINE OUT
M902
(WS-48B)
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