Electrical Adjustments - Sony STR-DA80ES Service Manual

DC BIAS CURRENT Adjustment
(with no signal input)
Note:
1. DC BIAS CURRENT adjustments should be made 30 seconds after
the POWER switch is turned on (POWER ON).
2. After replacing the power transistors, DC BIAS CURRENT adjustments
should be perfomed.
Procedure:
Digital volt meter
AMP BOARD
R615 1
R665
R016
2
R715
R765
3
[AMP BOARD] (COMPONENT SIDE)
FRONT Rch
REAR Rch
SECTION 3

ELECTRICAL ADJUSTMENTS

+
–
R665
1
2
3
D973
RV651
R668
R765
1
2
3
RV751
R768
R017
Connecting
point
FRONT Lch R615
FRONT Rch R665
CENTER R016
REAR Lch R715
REAR Rch R765
R618
C987
C988
D971
RV601
D972
3
2
1
C985
R615
R718
C986
RV701
3
R715
2
1
R016
RV001
3 2 1
CENTER
– 9 –
Adjustment Reading on
part Digital volt meter
RV601 20 mV
RV651 20 mV
RV001 20 mV
RV701 20 mV
RV751 20 mV
FRONT Lch
REAR Lch