Amp Adjustment; Confirmation Of Idling Current Of Amp Unit - Yamaha RX-V661 Service Manual

I AMP ADJUSTMENT

Confirmation of Idling Current of Amp Unit

• Right after power is turned on, confirm that the voltage
across the terminals of R
), R1153 (
R1152 (CENTER), R1150 (FRONT Lch), R1151 (SUR-
ROUND Lch), R1149 (SURROUND BACK Lch) are be-
tween 0.1mV and 10.0mV.
• If it exceeds 10.0mV, open (cut off) R1252 (
), R1112 (
Rch), R1110 (CENTER), R1106 (FRONT Lch), R1108
(SURROUND Lch), R1104 (SURROUND BACK Lch)
and reconfirm the voltage.
Attention
If the measured voltage exceeds 10.0mV after an am-
plifier repair, first check for a defective component be-
fore cutting the bias resistor.
• Confirm that the voltage is 0.2 mV to 15.0 mV after 60
minutes.
0.1mV - 10.0mV
(DC)
R1149
R1150
R1104
R1106
MAIN (1) P.C.B.
(
), R1154 (FRONT Rch),
), R1114 (FRONT
R1303 (SURROUND BACK Rch)
R1153 (SURROUND Rch)
R1154 (FRONT Rch)
R1152 (CENTER)
R1150 (FRONT Lch)
R1151 (SURROUND Lch)
R1149 (SURROUND BACK Lch)
Front
R1151 R1152
R1108
R1110
Rear
RX-V661/HTR-6060/DSP-AX761
CENTER
SURROUND Lch
FRONT Rch CENTER
Lch SURROUND Lch
BACK Lch
Open (cut off)
R1252 (SURROUND BACK Rch)
R1112 (SURROUND Rch)
R1114 (FRONT Rch)
R1110 (CENTER)
R1106 (FRONT Lch)
R1108 (SURROUND Lch)
R1104 (SURROUND BACK Lch)
R1153 R1154
R1112
R1114
FRONT Rch
FRONT Lch
SURROUND BACK Lch
FRONT
SURROUND
R1303
R1252
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