Sansui 6060 - 2. BLOCK DIAGRAM; 3. ADJUSTMENTS; 3-1. Adjustment of Bias Current

TONE CONTROL CIRCUIT
F.2646
Ai: Audio Muting SW
Tape Monitor SW
N.R. Adaptor SW
®) High Filter SW
©)
<?
GN.R.
9
INPUT L-CH
Selector
Balance VR
(6060)
AUX G
rREC ©
TAPE €
PLAY G
N pout iC Mic Jack
‘LIN
3. ADJUSTMENTS
3-1.
Adjustment
of
Bias
Current
(See
Fig.
3-1
&
3-2)
eo
** Audio Muting SW
% Low Filter SW
| not included in # 5050
Relay Pili
—o~e
5 Low Filter SW
L-CH
* Speaker
Phone Jack
(5050)
ee ea
-——= +40.5V Driver Circuit
Protection
Circuit Board EQ. Tone
from Pop Noise Circuit
SUPPLY
CIRCUIT
F-2648 LI Regulated
Power Supply Tuner
Circuit
ts —45V Driver Circuit
}—_—_——» + 37V (33V)
—37V (33V)
) shows voltage of #5050
Power Transistor
Value in (
ADJUST ADJUST FOR
15mV +1ImV
STEP SUBJECT EQUIPMENT
1 Bias Current DC Volt RO5, ROZ
L-CH Meter F-2648
2 Bias Current DC Volt RO6, RO8
R-CH Meter F-2648
Fig. 3-1
L-CH
® ® ® ®
15mV +1mV
Fig. 3-2
Power Transistors
(F-2648)
TRO1, TRO2
Volt
Meter
®
:
RO7, RO8
Volt Meter © TRO3, TRO4