Teac A-6300 - Page 37

PHONE OUTPUT CHECK
1. Place OUTPUT controls at the Specified Level Setting
with a reference input 400 Hz signal at -8 dB.
2. Connect an 8ft non-inductive resistor across the headphone output
(PHONES). Connect Test Set across the resistor.
3. Test Set should indicate -24 dB ±2 dB.
R
Fig. 13-3 Headphone Load Resistors
MINIMUM INPUT LEVEL SETTING -
LINE Input:
1. Connect an AF oscillator to the LINE IN jacks.
2. Place MONITOR switch in SOURCE; EQ switch and BIAS
switch in #1 position; RECORD MODE switches in ON position.
3. Apply a 400 Hz signal at -18 dB to the LINE IN jacks.
4. Turn LINE input controls fully clockwise, adjust VR-301/304 to obtain
the specified output level of -8 dB at OUTPUT jacks.
MIC Input:
[This is a check only. No adjustments are to be made.]
5. After adjusting VR-301/304, apply a 400 Hz signal at -70 dB to
the MIC IN jacks.
6. Rotate the MIC controls fully clockwise. This should give an out¬
put of -8 dB (specified output level) at OUTPUT jacks.
NOTE: Return MIC controls fully counterclockwise (CCW) to prevent
noise insertion during the following steps.
VU METER LEVEL SET -
Verify OUTPUT Controls to be at the Specified output level.
1. Place the MONITOR switch to the SOURCE position. METER switch in NORMAL.
2. Apply a 400 Hz signal at -8 dB to LINE IN jacks.
3. Adjust VR-302/305 for 0 VU (±0.5) on the VU meter.
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