Yamaha RX-V573, Service Manual

Page: 51 / 134

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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 R2154 (SURROUND BACK Rch),
R2152 (SURROUND Rch), R2149 (FRONT Rch), R2151
(CENTER), R2150 (FRONT Lch), R2153 (SURROUND
Lch) and R2155 (SURROUND BACK Lch) are within the
confines of 0.1 mV to 10 mV.
2. If measured voltage exceeds 10 mV, remove R2108
(SURROUND BACK Rch), R2107 (SURROUND
Rch), R2111 (FRONT Rch), R2110 (CENTER), R2109
(FRONT Lch), R2112 (SURROUND Lch) and R2133
(SURROUND BACK 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.
0.1 mV – 10 mV
(DC)
R2154 (SURROUND BACK Rch)
R2152 (SURROUND Rch)
R2149 (FRONT Rch)
R2151 (CENTER)
R2150 (FRONT Lch)
R2153 (SURROUND Lch)
R2155 (SURROUND BACK Lch)
1. 電源投入直後、R2154 （SURROUND BACK Rch）、R2152
（SURROUND Rch）、R2149（FRONT Rch）、R2151
（CENTER）、R2150（FRONT Lch）、R2153（SURROUND
Lch）、R2155 （SURROUND BACK 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、R2108 （SURROUND
BACK Rch）、R2107（SURROUND Rch）、R2111 （FRONT
Rch）、R2110（CENTER）、R2109（FRONT Lch）、R2112
（SURROUND Lch）、R2113 （SURROUND BACK 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。
Front side
MAIN (1) P.C.B.
R2151
R2110
R2109 R2111 R2108 R2113 R2107
R2112
R2150 R2149 R2154 R2155 R2152 R2153
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RX-V573/HTR-5065
RX-V573/HTR-5065