Teac A-4300SX - Output Level Setting

8-5 OUTPUT LEVEL SETTING
—
MAXIMUM
OUTPUT
LEVEL
CHECK
—
10.
Play
the
400
Hz/O
dB
tone
in
section
1
of
the
Test
Tape.
11.
Turn
the
OUTPUT
controls
fully
clockwise.
12.
Adjust
VR-201/203
for
—2
dB
(615
mV)
at
OUTPUT
jacks.
— SPECIFIED OUTPUT LEVEL SETTING —
13.
Reduce
both
OUTPUT
controls
together
until
the
lower
reading
channel
reads
—8
dB.
(approx.
2
o’clock
position).
14.
If
there
is
a
difference
in
level
between
L-ch
and
R-ch,
again
adjust
VR-201/203
(whichever
is
higher)
for
—8
dB
(308
mV).
NOTE: This is the Specified Output level setting. Do not
disturb
this
setting
until
the
remaining
adjustments
have been completed.
15. Adjust VR-202/VR-204 for 0 VU (at NORMAL scale)
reading on VU Meters, Set METER SW to HIGH. 0 VU
should be read on HIGH scale.
8-7 FREQUENCY RESPONSE —PLAYBACK—
16. Thread TEAC YTT-1002 on the deck.
17. Play Tape and compare reading on VTVM with the re-
sponse limits given in Fig. 8-5.
18. If adjustment is required, adjust VR-101/VR-103 for
3-3/4 ips (9.5 cm) speed.
19. Change Tape SPEED SW to 7-1/2 ips (19 cm) position.
20. Thread TEAC YTT-1003 on the deck.
21. Repeat Step 17.
22. If adjustment is required, adjust VR-102/VR-104 for
7-1/2 ips 19 cm) speed.
NOTE: If the frequency response does not meet specified
response limits, especially at the high-end of the
spectrum, head should be checked for accumu-
lated dirt or oxides. If clean, head azimuth must
be readjusted.
RESPONSE IN dB.
t
a‘
RESPONSE IN dB
mo
N
ES
1K
FREQUENCY IN Hr
Fig. 8-5 Frequency Response — PLAYBACK —
—
REVERSE
PLAYBACK
HEAD
CHECK
—
Depress ~@ (Reverse Play) button and check for suitable
output from both channels. If necessary adjust Height
and azimuth adj screws (See Fig. 6-3) of Reverse Play-
back Head for best output.
8-8 SIGNAL-TO-NOISE RATIO —PLAYBACK—
1. OUTPUT controls should be at the Specified Output
level settings.
2. Thread a YTT-1003 on the unit leaving the tape outside
the capstan and pinch roller.
3. Hold the play supply reel stationary and depress the play
(> ) button.
4. The VITVM connected to the OUTPUT jacks should indi-
cate readings listed below.
HIGH (7-1/2 ips) ........... 50 dB
LOW (3-3/4ips) ........... 48 dB
8-9 HEADPHONE OUTPUT CHECK
1. Connect an 8 ohm non-inductive resistor across the
headphone (PHONE) jack.
2. Connect VTVM across the resistor. VITVM should indi-
cate —24 dB +2 dB (61 mV ~ 39 mV).
15