Teac A-7300 - MEASUREMENT AND ADJUSTMENT; MECHANICAL ADJUSTMENTS; ADJUSTMENT OF D.C. (on the STABILIZER UNIT)

ADJUSTMENT OF D.C. Con the STABILIZER UNIT)
NOTE :
MEASUREMENT AND ADJUSTMENT
-"MECHANICAL-
The TEAC A~7300 uses highly reliable AC Motors for both
reel motors, and a DC direct-drive capstan system. It should re-
quire a minimum of mechanical maintenance or adjustment.
These adjustments are made at the factory. Readjustments should
only be required after long periods of operation or following
component replacement.
To prevent damage to the motor and control circuitry:
1. Remove terminal A from the Control PC board. See Fig. 1-2.
2. Disconnect the 11 pin connector from the motor (Connector Block).
Adjustment Procedure
1. Remove the rear panel.
2. Remove terminal A, and 11 pin connector.
3. Place the POWER switch to "ON".
4. Connect a VOM or VTIVM across the 24V Test Point (Red Lead
Socket) and chassis Ground.
Adjust VR21 if needed to obtain 24V + 0.5V DC.
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6. Adjust VR-22 for 5V +0.25V DC output at 5V test point (Pink Lead socket).
VR21 VR22
Decrease Increase Increase Decrease
Fig. 2 Adjustment Locations
Capstan motor Pink Lead Socket for 5 V
11P Connecter
Connecter
Block Red. Lead Socket for 24 V
Fig. 3 Test Points
3