Teac A-2300SR - Electrical Adjustment Sequence and Power Checks; Electrical Adjustment Sequence Chart; Power Supply Check and Adjustment; Playback Head Azimuth Adjustment

8-2. ADJUSTMENT SEQUENCE CHART
y
>
PLAYBACK
>
OUTPUT
LEVEL
eons
NRE
AD
z
HEAD
AZIMUTH
ADJ.
SETTING
CHECK AND ADJ
VU METER SPECIFIED
LEVEL CHECK LINE CONTROL SETTING
MONITOR LEVEL
SETTING
> VU METER > FREQUENCY
LEVEL SET RESPONSE (PLAYBACK?!
HEADPHONE
OUTPUT CHECK
RATIO (PLAYBACK) |
MIC INPUT
LEVEL CHECK
BIAS TRAP
ADJ.
RECORD HEAD
AZIMUTH ADJ.
OPTIMUM ERAS
MEASUREMENT
URE SIGNAL-TO-NOISE FREQUENCY
[_RATIO (OVERALL) RESPONSE (OVERALL)
SIGNAL-TO-NOISE
REC LEVEL
DISTORTION CROSS TALK CHANNEL
CHECK
REJECTION
SEPARATION
Fig. 8-1
Adjustment Sequence Chart
— —_—— PLAYBACK PERFORMANCE
8-3 POWER SUPPLY CHECK AND ADJ.
1. Remove wooden panel on left side of the deck for access
to the electrical adjustments.
2. Depress power SW to ON.
3. Connect a VITVM between the Power Supply P.C. Bd.
Test Point No. 13 and ground. See Fig. below.
4. Adjust R56 for +23 V DC. (see REAR VIEW on p. 9.)
=—n_
7
AC Voltmeter
: R56 |
+23 V DC Test Point
T~HISI
Fig. 8-2
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
. Connect a VTVM to either OUTPUT jack.
. Remove the head Housing (on front panel).
. Thread the following TEAC Test Tape YTT-1002 on the
deck.
. Play the 10 kHz Test Tone in section 2 of the Test Tape.
. Slowly rotate the azimuth screw until maximum indica-
tion is achieved on VITVM.
. 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
under TEST
Fig. 8-3 Head Alignment Fine Adjustment Set-up and
Test Connections (PLAYBACK)
15