Yamaha PX10 Service Manual page 56

PX10/PX8/PX5/PX3
2-2-5. DSP-MUTE noise level
Select "Analog > CFG1 （ +14dBu ） " with Service inspection mode.
Measured mode ／ 8Ω MODE
The signal of -10dBu is input to input terminal.
Select "Analog > DSP-MUTE ON " with Service inspection mode.
※Use the low-pass fi lter of 20kHz for the measurement.
※Item /DSP-MUTE OFF is executed, after ending an inspection.
2-2-6. Output noise level
Select "Analog > CFG1 （ +14dBu ） " with Service inspection mode.
Measured mode ／ 8Ω MODE
The inputs of both Ach/Bch are terminated by 100 〜 150ohm resistor.
※Use the low-pass fi lter of 20kHz for the measurement.
2-2-7. Crosstalk
Select "Analog > CFG1 （ +14dBu ） " with Service inspection mode.
Measured mode ／ 8Ω MODE
1kHz signal applied to Ach input terminal and adjust the signal level the Ach output
level is to be as below. And Bch input terminal shall be terminated with 100 〜
150ohm resistor. Measure the voltage of Bch output terminal.
PX10 500W
PX8 400W
PX5 250W
PX3 150W
※Use the low-pass fi lter of 20kHz for the measurement.
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Measurement condition
Measurement condition
Measurement condition
38.3dBu
37.3dBu
35.3dBu
33.0dBu
Criteria
All channel
PX10 -52dBu or less
PX8 -53dBu or less
PX5 -54dBu or less
PX3 -55dBu or less
Criteria
All channel
PX10 -54dBu or less
PX8 -55dBu or less
PX5 -56dBu or less
PX3 -57dBu or less
Criteria
All channel
PX10 -21.7dBu or less
PX8 -22.7dBu or less
PX5 -24.7dBu or less
PX3 -27.0dBu or less