Read Sony TA-N9000ES Service Manual online
– 7 –
DC BIAS CURRENT Adjustment
(with no signal input)
(with no signal input)
After replacing the power transistors, DC BIAS CURRENT ad-
justments should be perfomed.
justments should be perfomed.
Setting:
SPEAKER IMPEDANCE switch (S801): 8
SPEAKER IMPEDANCE switch (S801): 8
Ω
MIN (NORMAL
USE)
Procedure:
Connecting
Adjustment
Reading on
point
part
the tester
FRONT Lch
CN601
RV601
11 ±1 mA
FRONT Rch
CN701
RV701
11 ±1 mA
CENTER
CN501
RV501
11 ±1 mA
REAR Lch
CN301
RV301
11 ±1 mA
REAR Rch
CN401
RV401
11 ±1 mA
SECTION 4
ELECTRICAL ADJUSTMENTS
Tester
+
–
2
1
MAIN BOARD
(CN301, 401, 501,
601, 701)
(CN301, 401, 501,
601, 701)
Note:
After adjustment, check five connecting points.
Adjustment Location:
RV601
CN601
1
2
CN401
1
1
2
CN301
REAR Lch
RV401
1
2
RV501
FRONT Lch
CN701
1
2
CN501
1
2
RV701
RV301
CENTER
FRONT Rch
REAR Rch
[MAIN Board]
(Component Side)
(Component Side)
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