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Capstan
Check point
"~™
Mirror-equipped
cassette half
(-) Screwdriver
Fig. 3 Tape transport adjustment
PLAYBACK
LEVEL ADJUSTMENT
Since this adjustment
determines
the DOLBY
NR level during playback, it should be performed
precisely.
Setting:
Mode
...............
Playback (FWD)
Test tape
............
STD-341A, 333Hz 0dB
portion
AC mV meter.........
TP601 of the DOLBY
NR
assembly L
TP601 of the DOLBY
NR
assembly R
Fig. 4 Adjustment points
CT-7R/6R
VR501 (Lch)
VR502 iAch)
PB HEAD
STD-341A
333Hz, OdB
OUTPUT
[a7aBy 0.65v
(0.65V)}}
Procedure:
Adjust the VR501
(Lch) and VR502
(Rch) of
the
AMP
assembly
so
that
the AC mV
meter
reads - 3.7dBv (0.65V).
PLAYBACK
EQUALIZER
CHECK
Setting:
Mode
...............
Playback (FWD and
REV)
Test tape
............
STD-341A, 333Hz and
6.3kHz portions
AC mV meter.........
OUTPUT terminals
333Hz, -200B
6.3kH2z, -200B
6.3kHz level Saw
= +0.5dB+2dB
Procedure:
Play the 333Hz and 6.3kHz portions of the test
tape. Check that the difference between
the two
output levels does not exceed +0.5dB+2dB.
TP601 (DOLBY Ass'y Lch)
VR601
(DOLBY Ass'y Lch)
TP601
(DOLBY
Ass'y Rch)
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