Teac A-6100 Service Manual page 27

RECORD HEAD AZIMUTH ADJUSTMENT
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Coarse Adjustment:
NOTE: The effect of turning the azimuth screw will not immedi¬
ately register on the Test Set. A slight delay will be noticed.
Therefore, the screw must be rotated slightly with a pause to
see the effect.
1. Connect a Test Set to the OUTPUT jack and an AF oscillator to
the LINE IN jack, then set the AF oscillator to 10 kHz.
2. Make certain that the LINE controls are at the Specified Input
Level positions.
3. Place the MONITOR switch to SOURCE and adjust the AF oscillator
to obtain a signal of 20 dB below the Specified Output Level.
(The Test Set will indicate -28 dB.)
4. Thread a record Test Tape on the unit.
5. Place the MONITOR switch in the TAPE position.
6. While recording adjust the azimuth screw for maximum indication
on the Test Set.
Fine Adjustment:
NOTE: It is absolutely essential to accomplish the coarse ad¬
justment before performing the fine adjustment to avoid phase
error larger than 45°
7. Connect the test equipment as shown in Fig.11-1.
8. Apply a 10 kHz signal at -28 dB to the LINE IN jacks and record
this signal.
9. Carefully adjust the azimuth screw until the oscilloscope shows
the signal to be in phase.
10. Secure the screw with a drop of Locking paint.
T-293
Fig. 11-6 Phase shift
Refer to Fig. 11-1 Fine Adjustment Set-up (playback)
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