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Bias trap adjustment
1. Setting—Recording mode
Symbol No.
Equalizer select switch
N
Bias select switch
MID
DIN/LINE
Dolby N.R switch
OFF
Switches and controls
Position
OR
Input select switch
DNL switch
OFF
Record level controls
Maximum
Output level controls
Maximum
2.
Remarks
LAL, R
Within 1 dB
of min. value
Bias current adjustment
[Symbol No. |
Switches and controis
Position
Equalizer select switch
NOR
Bias select switch
MID
Input select switch
DIN/LINE
Dolby N.R switch
OFF
DNL switch
OFF
Record level controls
Maximum
Output level controls
Maximum
Fig. 42
Recording/ playback output level adjustment
1. Setting —Recording/playback mode
S4
S5
RVIL.R
RV2L, R
OR
N
Equalizer select switch
Bias select switch
MID
Input select switch
DIN/LINE
OFF
Dolby N.R switch
DNL switch
OFF
Maximum
Maximum
Record level controls
Output level controls
VU_Meter
Normal tape
(BASF)
Frequency
counter Record/playback
socket (input) F
\
1kHz/10 kHz
VU Meter
a
=
Fig.
43
RT2L,R
RTAL. R
Check the output levels of two
signals (1 kH2/10 kHz).
The difference between two signals
should be also within + 2 dB.
If
the difference is not within£2 dB,
re-adjust RT4L, R.
Dolby N.R confirmation
ie Setting —-Recording/play back mode
Symbol No.
Switches and controls
Position
-Equalizer select switch
NOR
Bias select switch
MID
DIN/LINE
Sd
Input select switch
Sd
Dolby N.R switch
ON
S6
DNL switch
OFF
RVIL_R
RV2L.R
Record level control
Maximum
4
Output level control
Maximum
D-720(W, FS
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