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Electrical Adjustments - Sony STR-DA6400ES Service Manual

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3 7 63 1515 0
BIAS ALIGNMENT ADJUSTMENT
Note: After 10 minutes or more have passed since the power supply was
turned on, this adjustment is done.
Connection:
CN1561 (CN1611, CN1761, CN1861) pin
CN1561 (CN1611, CN1761, CN1861) pin
Note: Pin 3, 4 of CN1611 are open.
Procedure:
1. Connect a digital voltmeter to the CN1561 (CN1611, CN1761,
CN1861).
2. Press the [POWER] button to turn on the main power.
3. Adjust the RV1501 (RV1551, RV1601, RV1701, RV1751,
RV1801, RV1851) so that the digital voltmeter reading is 5
mV to 20 mV.
Note: Adjust for the digital voltmeter reading to become 5 mV as much as
possible.
Adjustment and Connection Location:
– BIAS Board (Conductor Side) –
TE
L 13942296513
Adjustment hole
Adjustment hole
for RV1801
for RV1851
(SBL)
– PROTECTOR (SB) Board
(Component Side) –
CN1861
4 1
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ELECTRICAL ADJUSTMENTS

, CN1561 (CN1761, CN1861) pin
, CN1561 (CN1761, CN1861) pin
Adjustment hole
for RV1601
(SBR)
(CENTER)
– PROTECTOR (F-C) Board
(Component Side) –
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SECTION 5
8
digital voltmeter
Q Q
3
6 7
1 3
Adjustment hole
Adjustment hole
for RV1501
for RV1551
(F-L)
(F-R)
CN1611
CN1561
4 1
4 1
.
STR-DA6400ES
2 9
9 4
2 8
+
1 5
0 5
8
2 9
9 4
Adjustment hole
Adjustment hole
for RV1701
for RV1751
(SUR-L)
(SUR-R)
– PROTECTOR (SURR) Board
(Component Side) –
CN1761
4 1
m
co
9 9
2 8
9 9
27

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