Confirmation Of Idling Current; Amp Adjustment / アンプ部調整; Www Ao - Yamaha RX-V659 Service Manual

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■ AMP ADJUSTMENT / アンプ部調整
● CONFIRMATION OF IDLING CURRENT
1. Immediately after the power is turned on, measure the
voltage across resistor terminals in the column "A" in
the table below and confirm that the measured value is
between 0.1 mV and 10.0 mV.
2. If the measured voltage exceeds 10.0 mV, open (cutoff)
the resistor in the column "B" in the table below and
reconfirm the voltage.
Attention:
If the idling current exceeds 10.0 mV after a power am-
plifier repair, check for a defective component before
cutting the resistor.
3. Confirm that the voltage is between 0.2 mV and 15.0
mV after 60 minutes.
0.1mV ~ 10.0mV
(DC)
TE
L 13942296513
R45 (FRONT Lch)
R46 (FRONT Rch)
R50 (CENTER)
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0.1mV ~ 10.0mV
(DC)
Cut off
カット
R38 (FRONT Lch)
R39 (FRONT Rch)
R37 (CENTER)
R34 (SURROUND Lch)
R35 (SURROUND Rch)
R36 (SURROUND BACK Rch)
R395 (SURROUND BACK Lch)
<Position for Adjusting MAIN (1) P.C.B.>
MAIN (1) P.C.B.
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● アイドリング電流確認
1. 電源投入直後、下表のA欄の抵抗の端子間電圧を測定し、0.1
mV∼10.0 mVであることを確認してください。
2. 電圧が10 mVを越えている場合は、下表のB欄の抵抗をカッ
トし、電圧を再確認してください。
注意:
パワーアンプ修理後に10.0 mVを超えている場合は、抵抗を
カットする前に故障箇所を調べてください。
3. 60分後、電圧が0.2 mV∼15.0 mVであることを確認してく
ださい。
P.C.B.
A
MAIN (1) P.C.B.
R45
R46
R50
R47
R48
R49
POWER (1) P.C.B.
R398
Q Q
3
6 7
1 3
1 5
R47 (SURROUND Lch)
R48 (SURROUND Rch)
R49 (SURROUND BACK Rch)
R398 (SURROUND BACK Lch)
G1
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.
RX-V659/HTR-5960
9 4
2 8
DSP-AX759/DSP-AX759SE
CHANNEL
FRONT L ch
FRONT R ch
CENTER
SURROUND L ch
SURROUND R ch
SURROUND BACK R ch
SURROUND BACK L ch
0 5
8
2 9
9 4
2 8
Ground lead
アース線
m
9 9
B
R38
R39
R37
R34
R35
R36
R395
9 9
43

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