Electrical Adjustments - Sony TA-N9000ES Service Manual

DC BIAS CURRENT Adjustment
(with no signal input)
After replacing the power transistors, DC BIAS CURRENT ad-
justments should be perfomed.
Setting:
SPEAKER IMPEDANCE switch (S801): 8
USE)
Procedure:
MAIN BOARD
(CN301, 401, 501,
601, 701)
2
1
Note: After adjustment, check five connecting points.
Adjustment Location:
FRONT Lch
CENTER
FRONT Rch
SECTION 4

ELECTRICAL ADJUSTMENTS

MIN (NORMAL
Tester
+
–
[MAIN Board]
(Component Side)
RV601
1
CN601
2
RV501
1
CN501
2
RV701
1
CN701
2
– 7 –
Connecting
point
FRONT Lch CN601
FRONT Rch CN701
CENTER CN501
REAR Lch CN301
REAR Rch CN401
CN401
1 2
RV401
2
1
CN301
RV301
Adjustment Reading on
part the tester
RV601 11 ±1 mA
RV701 11 ±1 mA
RV501 11 ±1 mA
RV301 11 ±1 mA
RV401 11 ±1 mA
REAR Rch
REAR Lch