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7.2
. ELECTRICAL ADJUSTMENTS
Adjustment Conditions
1. The mechanical adjustments must be completed first.
2. The head must be cleaned and demagnetized.
3. Tum power on allow the deck to warm up for at least a few
minutes before commencing any electrical adjustments.
4. The reference signal is 0 dBV=1 Vrms.
Connect a 10 kQQ load resistance to the OUTPUT terminals.
6. Unless otherwise specified, the switches listed below are left
inthe positions indicated.
te
DOLBY NR
: OFF
Test Tapes
STD-331E
: Playback adjustments
(See Fig. 7-4)
STD-631 or STD-632.
: NORMAL blank tape
STD-621
: CrOQ2 blank tape
a
0 dB: 315 Hz, 250 nwb/m
30s
30s
30s
10s
10s
CT-W103
List of Adjustments
Playback sections
1. Head azimuth adjustment.
2. Playback level adjustment.
Recording sections
1. Recording bias adjustment.
2. Recording level adjustment.
3. Level meter check.
Dolby noise reduction manufactured under license from Dolby Labora-
tories Licensing Corporation.
"DOLBY"
and
the double-D
symbof OO are trademarks
of Dolby
Laboratories Licensing Corporation.
NOTE:
This unit has an automatic tape selection feature.
eee
eee ee ee
ee ee
ee
ee
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wee coves
10s
Fig. 7-4 Constants of the test tape STD-331E
Deck II
Head azimuth adjustment screw
Fig. 7-5 Head azimuth adjustment
PLAY
BACK
RECORDING
Fig. 7-6 Frequency response zone
= 1
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