Teac A-6010GSL - Measurement and Adjustment - Electrical-; Power Supply Circuit Check

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7. MEASUREMENT AND ADJUSTMENT
-ELECTRICAL-
GENERAL NOTICE
Before performing any maintenance on this unit, all metal
parts that the tape will come into contact with must be
cleaned and demagnetized.
It is important that the unit is set for the proper voltage
and frequency for your locality.
Standard test tapes and test equipment must be used when per
forming maintenance to insure reliable results.
Procedures for checks and adjustments, unless otherwise indi-
cated, are for the left channel at 7~1/2ips. The same pro-
cedures are to be applied to the right channel and the other
tape speeds.
All controls mentioned in this book will be. printed in bold
letters and will be exactly as they appear on the unit.
Double designated symbol numbers refer to left channel/right
channel.
THD: Yhird harmonic distortion.
Value of "dB" in the text refers to 0dB=0.775V, except where
specified. If a level meter or an AC VIVM calibrated to 0dB
=1V is to be used, appropriate compensation should be made
by adding approximately 2 dB.
When not using the TEAC test set M-826A, connect a 10 kn load
across the OUTPUT jacks to assure that 0dB=0.775V with the
VIVM.
POWER SUPPLY CIRCUIT CHECK
Measure DC voltage of rectifier
circuit at R-309 for approximately
23 volts. If proper voltage is
not present, adjust VR~304.
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