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2-2.
ELECTRICAL ADJUSTMENTS
Tape Speed Adjustment
Setting:
VOLUME control:
mechanical mid
TAPE SELECT switch: NORM
DOLBY NR switch: OFF
Procedure:
Mode: playback
digital frequency
test tape
WS-48A
(3kHz, OdB)
counter
set
·k~ ~
HEADPHONES
1.
Open the solder bridge shown below.
2.
Turn RV601 so that frequency reading be-
comes in 3090Hz± 10Hz. (at the ending part
of the test tape)
3.
Resolder the adjustment patterns opened
in
step 2 above. Now frequency reading should be-
comes in 3000 Hz ± 9 Hz.
Specification:
Digital frequency counter
3000Hz± 9Hz
Adjustment Location:
-main board-
Adjustment
patterns
RV601
WM-DDm
Playback Head Azimuth Adjustment
Setting:
VOLUME control:
mechanical mid
TAPE SELECT switch: NORM
DOLBY NR switch: OFF
Procedure:
1.
Mode: playback
32n.
HEADPHONES
VTVM
El
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.
L·CH
~; ~~:;
@hk
Screw
peak
position
3.
Phase Check
Mode: playback
test tape
P-4-A063
(6.3kHz, -10d8)
.-_.----'-within
--::~~-+---:~_...-~or-
1 dB
L·CH
peak
R·CH
peak
-angle
L-CH
320
HEADPHONES
Screen pattern
0@@(§)Q
lin phase
45'
90°
1
t
135'
18CfJ
~------v----J
good
wrong
Adjustment Loc
- 7 -
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