Teac A-5500 - Record Head Azimuth Adjustment

BIAS ADJUSTMENT
WIPWNNMEF
RECORD HEAD AZIMUTH ADJUSTMENT
NOTE: Adjust bias traps (above) before proceeding. The following
adjustments are made only at 9.5 cm-3-3/4 Tape speed.
. Thread record Test Tape YIT-8003 or equivalent tape on the unit.
. Place RECORD BIAS switch HIGH, EQ switch HIGH position.
. Place MONITOR switch in the TAPE position.
. Apply 7 kHz signals at -18 dB to the LINE IN jacks.
. Adjust capacitor VC-551/552 for a peak on the Test-Set, then turn
the capacitor clockwise until a decrease of 2.5 dB from the peak
is obtained.
RECORD BIAS OSC
400 Hz
7 kHz
OUTPUT LEVEL
a
BIAS CURRENT (mA)
Fig. 11-6 Bias Trap Check Point Fig. 11-7 Bias Limits chart
Coarse Adjustment:
Ow
NOTE: The effect of turning the azimuth screw will not immedi-
ately register on the Test-Set. A slight delay will be noticed.
Therefore, the screw must be rotated slightly with a pause to
see the effect. See Fig. 11-8.
. Connect a Test-Set to the OUTPUT jack and an AF oscillator to
the LINE IN jack, then set the AF oscillator to 10 kHz.
. Make certain that the LINE controls are at the Specified Input
Level positions.
. Place the MONITOR switch to SOURCE and adjust the AF oscillator
to obtain a signal of 20 dB below the Specified OUSPUE Level.
(The Test-Set will indicate -28 dB.)
. Thread a record Test Tape on the unit.
. Place the MONITOR switch in the TAPE position.
. While recording adjust the azimuth screw for maximm indication
on the Test-Set.
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