Teac A-6300 - 11. MEASUREMENT AND ADJUSTMENT -ELECTRICAL-; PLAYBACK HEAD AND OUTPUT LEVEL ADJUSTMENTS

A-6100 ONLY see page 30 for A-6300
11. MEASUREMENT AND ADJUSTMENT
-ELECTRICAL-
ADJUSTMENT SEQUENCE -
PREPARATIONS ---
The following checks and adjustments must be performed with the
switches of the A-6100 set as outlined below.
OUTPUT LEVEL SW^-LOW METER SW — NORMAL
(on the Rear Panel) SPEED SW —» LOW
PLAYBACK HEAD SW —- 2 track
PLAYBACK HEAD AZIMUTH ADJUSTMENT -
NOTE: After head replacement or if, during playback, a slight pressure
on the tape against the heads results in a higher indication
at the Test-Set (M-826A), head azimuth should be readjusted.
Coarse Adjustment:
1. Connect a Test-Set to either OUTPUT jack; open the head housing.
2. Thread a TEAC Test Tape YTT-1003 on the unit.
Play the 15 KHz Test Tone in Section 2 of the Test Tape.
3. Slowly rotate the azimuth screw until maximum indication
is obtained on the Test-Set.
4. Repeat the procedure for the 4 track play head.
Fine Adjustment:
NOTE: It is absolutely essential to accomplish the coarse
adjustment before performing the fine adjustment to avoid
phase errors larger than 45? After coarse adjustment, do
not make large corrections, turn azimuth screw 1/4 turn or
less.
5. Connect the test equipment as shown in Fig.11-1.
6 . Play a 50 Hz^lO kHz signal and adjust the azimuth screw
until the oscilloscope shows that the signals are less
than 45° out of phase ( 2 track and 4 track ).
7. Secure the screw with a drop of Locking Paint.
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