Sansui TA-300 - Page 3

TA-300/500.
©
Driver
Amp
Circuit
with
IC,
AN7070
47 yr any ue |pF
ee
o—_1(2)
IN PUT
[sin jose
—OOUT PUT
| ay
ef
HT
a
iSP
die |
2. ADJUSTMENTS
9-1.
Driver
Circuit
Board
Adjustments
(See
Top
View
on
page
7)
Note:
1.
Master
Volume
....-
+.
52
ee-
Minimum
(2)
Bias
Current
adjustment
2,
Room
Temperature
........-.
18°C
~
28°C
MEASURE
OUTPUT
;
ADJUST
ADJUST
FOR
(65°F ~ 83°F)
3,
For
the
adjustment,
run
the
unit
for
more
than
3
minutes
after the power is switched on.
(1)
DC
OV
adjustment
(TA-500
only)
DC 20 mV
Between emitters of VRO3
TROS and TRO? F-3016
VRO4
F-3016
Note:
1.
By
turning
salusinient
volumes,
VRO3
and
VRO04
coun-
terclockwise,
the
bias
current
is decreased.
2.
In
case
of
adjusting
or
confirming
bias
current,
avoid
such
a
measurement
that
the
power
transistors
are
heated.
2-2. FM Adjustment
GENESCOPE : DETECTOR PROBE BLOCK
O-W—-1 3
4.7kQ LOpF N60.
iN 8 | OUT
AUDIO OSC