Teac A-3340S - Page 26

VU METER CALIBRATION —RECORD— ——~--
10. With the same 400 Hz signal at -18 dB applied and the OUTPUT
switches FRONT and REAR in SOURCE adjust. VR-302/305 for 0 vu
on the VU meters.
Before making any adjustments on the record amplifier, be sure
that all tests in the HEAD ALIGNMENT, PLAYBACK and MONITOR PER-
FORMANCE sections have been accomplished and that all level ad-
justments are correct,
Optimum recording performance is dependent upon tape charac-
teristics. The TEAC A-3340S is factory set with SCOTCH type
203 for HIGH Bias and 150 type for NORMAL Bias tapes,
BIAS TRAP ADJUSTMENT —
The bias trap tank circuit keeps the bias signal from reaching
the record and monitor amplifier and under normal "no signal"
conditions, voltage should not be present at the OUTPUT jacks.
1. Place BIAS/EQ switch in the HIGH position, OUTPUT switch in TAPE
position and all RECORD MODE switches ON. Place tape mode
lever at PAUSE position. Depress RECORD and ( m) buttons.
2, Connect a VIVM to the junction of L-302/c-312 (Left channel),
L~304/C~330 (Right channel).
3. Adjust L-302, L-304 for minimum reading.
Adjust BiAS-OSC
L302/304
\c312/330 REC HEAD
Q303/307
CHECK POINT
"7
Fig. 11-4 Bias Trap Check Point
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