Sony TA-535 - Power Amp Board; Electrical Adjustment

TA-3535 TA-535
SECTION 3
ADJUSTMENT
ELECTRICAL ADJUSTMENT
POWER AMP BOARD
@
Remove
the
power
LED
Meter
Adjustment
amp
board
from
the
holder.
|
1.
Set
the
volume
within
the
lower
range.
Appl;
IkHz signal at the jack—TAPE 2. Adjust the
input signal with the attenuator so that the
voltage at the both side of the speaker is 2.83V
(1W).
2. Turn RT403 so that the brightness of the LED
@
Unsolder
the
lead
of
the
both
channels
(L,
R)
are
the
same.
wires
of
the
3. Turn RT401 and RT402 so that the LED meters _
thermistor.
of the both channels indicate 1W.
4.
Turn
the
VOLUME
to
the
maximum
point
and
adjust the input signal so that the voltage at both
side of the speaker becomes 17.9V (40W),
:
Confirm
that
the
LED
meter
indicates
40W.
If necessary, repeat steps 3 and 4.
Power
amp
board
lo TAPE 2 SPEAKER es
BQ
CIRCUIT
BOARDS
(more
than
50W)
@ — @ : Common to all boards @ — @: Tone Board Removal
® — @: Volume Board Removal QQ) —@: Mixing Board Removal
@® —@®: Function Board Removal
©
tone
board
—
mixing
board
—
RT403 RT402 RT401
@ volume board
LG 0) a \ connector
@ Remove the knobs.
@ BTP3 x6