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Teac A-650 Service Manual page 21

Stereo cassette deck with dolby system

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o.
2.
5.
Preparations:
VtR
Fig.
Connection
Switch Setting:
DOLBY NR
EQ
LIMITER
BIAS
OUT
180°
Fig. 6-5
Confirming Phase Relationship
Fig. 6-4
Head Azimuth Adjustments Location
21
b.
4.
4.
5.
Load and play a TEAC MTT-150 test tape.
Make sure the phase relationship between the 2 signals
(left channel and right channel) is within 45° on the
oscilloscope.
Load a TEAC MTT-116U test tape.
Play the 10 k z signal section of the tape.
Slowly adjust the azimuth adjusting nut for the maxi ­
mum indication on the VTVM.
Secure the nut with a drop of locking paint.
OUTPUT: Set for convenient output level.
NOTE
Except for the Playback Frequency Response checks,
all alignments in the PLAYBACK PERFORMANCE
have to be done with the EQ switch set to position 3
only unless there is a special reason which requires
that other positions also be checked.
ADJUSTING FOR +13 V
Apply AC power to the deck and set the POWER
Switch to IN.
Connect the DC Voltmeter between #11 terminal (+)
of the 16P Plug and ground.
Adjust VR601 to provide the desired D.C. output
voltage of + 13 V.
ADJUSTING FOR +24 V
Change connecting point of the DC Voltmeter to #10
terminal of the Plug (+) and ground.
Adjust VR602 for +24 V.
a.
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6-2-1. RECORD/PLAYBACK HEAD AZIMU H
ADJUS MEN S
OSCILLOSCOP E
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