Amplifier Section Bias Adjustment - Harman Kardon AVR137 Service Manual

harman/kardon

AMPLIFIER SECTION BIAS ADJUSTMENT

Measurement condition
.No input signal or volume position is minimum.
Standard value
.Ideal current = 48mA (± 5%)
.Ideal DC Voltage = 25.92mV (± 5%)
DC EVM
VR32
DC VOLTMETER ; Connect to
CN66(SL),CN61(CEN),CN64(SR),CN63(FL),CN65(SBL/SL(AVR132,144,145)),CN62(FR),CN67(SBR)
NO.
1
2
3
4 Surround Left
5 Surround Right
CUP11911Y (MAIN PCB)
-
+
CN61 CN64
VR34
VR33
Channel
Front Left
Front Right
Center
AVR 137/230
CN63 CN65
VR35 VR36
Adjust for
25.92mV (± 5%)
25.92mV (± 5%)
25.92mV (± 5%)
25.92mV (± 5%)
25.92mV (± 5%)
AVR137/230 Service Manual
CN62
Adjustment
CN63
CN62
CN61
CN65
CN64
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