Power Amplifier Adjustment / パワーアンプ調整 - Yamaha RX-V375U Service Manual

Table of Contents

Advertisement

■ POWER AMPLIFIER ADJUSTMENT / パワーアンプ調整
1. Right after power is turned on, confirm that the voltage
across the terminals of R137 (SURROUND Rch), R135
(FRONT Rch), R133 (CENTER), R134 (FRONT Lch) and
R136 (SURROUND Lch) are within the confines of 0.1
mV to 10 mV.
2. If measured voltage exceeds 10 mV, remove R81
(SURROUND Rch), R79 (FRONT Rch), R80 (CENTER),
R78 (FRONT Lch) and R77 (SURROUND Lch), and
then reconfirm the voltage.
Attention
If the measured voltage exceeds 10 mV after repairing
the power amplifier, check other parts again for any
possible defect before removing the resistor.
3. Confirm that the voltage is within the confines of 0.2
mV to 15 mV after 60 minutes.
R137
MAIN (1) P.C.B.
0.1 mV – 10 mV
(DC)
Front side
R81
R77
R136
R135
1. 電源投入直後、 R137(SURROUND Rch) 、 R135(FRONT
Rch) 、R133(CENTER) 、R134(FRONT Lch) 、R136
(SURROUND Lch)の端子間電圧を測定し、0.1 mV か
ら 10 mV の間であることを確認してください。
2. 電圧が 10 mV を超えている場合は、R81 (SURROUND
Rch) 、R79 (FRONT Rch) 、R80 (CENTER) 、R78 (FRONT
Lch) 、R77 (SURROUND Lch)を外し、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 mV を超えている場合は、抵
抗を外す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 mV であることを確認し
てください。
R137 (SURROUND Rch)
R135 (FRONT Rch)
R133 (CENTER)
R134 (FRONT Lch)
R136 (SURROUND Lch)
R79
R78
R134
R133
RX-V375/HTR-3066/HTR-2866
R80
61

Advertisement

Table of Contents
loading

Table of Contents