Read Sony MHC-EX66 / TC-EX66 / TC-EX660 Service Manual online
– 11 –
Record/Playback Head Azimuth Adjustment
Procedure:
1. Mode: REV playback
1. Mode: REV 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 1 dB.
of output levels match together within 1 dB.
+
–
–
set
LINE OUT
frequency counter
test tape
WS-48B
(3 kHz, 0 dB)
WS-48B
(3 kHz, 0 dB)
47 k
Ω
1. Set to FWD playback mode.
2. Adjust Variable resistor on the motor (M902) so that the fre-
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)
Screw
position
position
L-CH
peak
peak
within
1dB
1dB
output
level
level
L-CH peak
R-CH peak
within
1dB
1dB
angle
R-CH
peak
peak
3. Phase Check
Mode: REV playback
+
–
–
V
H
+
–
Screen pattern
Good
Wrong
in phase 45
°
90
°
135
°
180
°
LINE OUT
set
R-CH
L-CH
47 k
Ω
47 k
Ω
oscilloscope
test tape
P-4-A100
(10 kHz, –10 dB)
P-4-A100
(10 kHz, –10 dB)
4. Set in the FWD mode and repeat the step 1 to 3.
5. After the adjustment, lock the screw with locking compound.
5. After the adjustment, lock the screw with locking compound.
Adjustment Location: Record/Playback head
FWD side
REV side
Adjustment screw
+
–
–
set
47 k
Ω
LINE OUT
level meter
test tape
P-4-A100
(10 kHz, – 10 dB)
P-4-A100
(10 kHz, – 10 dB)
Tape Speed Adjustment
Procedure:
Mode: FWD playback
Mode: FWD playback
M902
adjustable resistor
Sample Value of Wow and flutter: 0.3% or less W. RMS
(WS-48B)
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