Teac A-3300SX - Power Supply and Playback Head Alignment

8-2 ADJUSTMENT SEQUENCE CHART
POWER
SUPPLY
PLAYBACK
OUTPUT
LEVEL
PAU
METEE
|
>
CHECK
AND
ADJ.
a
HEAD
AZIMUTH
ADJ.
P|
SETTING
>|
LEVEL
SET
MONITOR LEVEL
VU METER SPECIFIED
SETTING
FREQUENCY
RESPONSE (PLAYBACK)
VU METER
HEADPHONE _| SIGNAL-TO-NOISE 4
QUTPUT CHECK RATIO (PLAYBACK)
| LEVEL CHECK t ee CONTROL SETTING
1 MIC INPUT BIAS TRAP
LEVEL CHECK ADJ.
RECORD HEAD
AZIMUTH ADJ.
BIAS ADJ.
REC LEVEL
SET
CROSS
TALK
Lg —{
CHARET
oy
J
Seine
Je
Ranovovensse
HCL
Resvosse
covenaui,
}—
Fig.
8-1
Adjustment
Sequence
Chart
PLAYBACK
PERFORMANCE
8-3
POWER
SUPPLY
CHECK
AND
ADJ.
1.
Connect
a
VTVM
to
either
OUTPUT
jack.
1.
Remove
wooden
panel
on
left
side
of
the
deck
for
access
2.
Remove
the
head
Housing
(on
front
panel).
to
the
electrical
adjustments.
3.
Thread
the
following
TEAC
Test
Tape
on
the
deck.
2. Depress power SW to ON.
3. Connect a VIVM between the Power Supply P.C. Bd.
Test Point 37 and ground. See Fig. below. 4.
4. Adjust VR-1 for+23 V DC. (see REAR VIEW on p. 9.)
Fig. 8-2
+23 V DC Test Point
8-4 PLAYBACK HEAD AZIMUTH ADJ.
NOTE: Before proceeding with the following head align-
ments be sure that heads have been properly
mounted as to HEIGHT, TILT and TANGENCY.
See page 10.
— FINE ADJUSTMENT —
TAPE SPEEDSW........... LOW
OUTPUT SW ............. TAPE
REEL SW ............. SMALL
YTT-1003 for 7-1/2 ips (or YTT-1002 for 3-3/4 ips)
speed.
Play the 16 kHz/—10dB (or 10 kHz for 3-3/4 ips) Test
Tone in section 2 of the Test Tape.
. Slowly rotate the azimuth screw until maximum indica-
tion is achieved on VT VM.
. Connect an oscilloscope to the OUTPUT jacks as shown
in Fig. 8-3.
. Adjust the azimuth screw (If necessary) until the oscillo-
scope shows that the signals are less than 45° out of
phase.
. Secure this screw with a drop of locking paint.
OSCILLOSCOPE
DECK
under TEST
Fig. 8-3 Head Alignment Fine Adjustment Set-up and
Test Connections (PLAYBACK)