Read Sony STR-DB798 Service Manual online
12
STR-DB798
BIAS ADJUSTMENT
Condition:
input signal: no signal (no load)
volume:
input signal: no signal (no load)
volume:
minimum
Connection
Procedure:
1. Connect a digital voltmeter to the CN432 (CN482, CN532,
CN582, CN632, CN682, CN732) on the MAIN board.
2. Press the
I
/1
button to turn on the main power.
3. Adjust the RV431 (RV481, RV531, RV581, RV631, RV681,
RV731) on the MAIN board so that the digital voltmeter
reading is 15
reading is 15
±
2 mV.
Note:
When the adjusting voltage is higher than 15
±
2 mV, adjust the
voltage to the minimum voltage.
Adjustment and Connection Loacation:
+
–
–
digital voltmeter
CN432 (CN482, 532, 582, 632, 682, 732) pin
1
CN432 (CN482, 532, 582, 632, 682, 732) pin
2
CN432
CN482
CN532
CN582
CN632
CN682
RV581
RV531
RV631
RV681
RV481
RV731
CN732
2 1
2 1
2 1
2 1
2 1
1
2
2 1
RV431
– MAIN Board (Component Side) –
SECTION 5
ELECTRICAL ADJUSTMENTS
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