JVC AX-M9000, Руководство по обслуживанию

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AX-M9000
1-10
100Hz More than 70dB
1kHz More than 70dB
10kHz More than 70dB
100Hz More than 70dB
1kHz More than 70dB
10kHz More than 70dB
Adjustment method
2. Adjustments and confirmation
Remarks
Five minutes later
after turning the
power on
Description
Standard
output
Total distortion
factor
Output level
Hum noise
Frequency
characteristics
AC voltage of
speaker terminal
Adjustments of
idling currency
Confirmation of
idling currency
Crosstalk
Adjusting method
1) INPUT LINE1 - Output at the time of THD0.5% at f=1kHz
1) INPUT LINE1 - Distortion factor at the time of
200W (40.0V) at 8 load
1) Output level at the time when inputting 1kHz 200mV
to LINE 1
1) Line 1
1) No signal, no load, Vol. 0.0
1) Prior to turning the power on, turn the R398
counterclockwise fully
2) After connecting the 3 pin and 4 pin of the CN303 to the
electronic voltmeter, adjust the voltage to 2-3mV.
3) After elapsing five minutes, adjust the voltage to
3.5+/-0.5mV. Since there is backlash, thoroughly adjust it.
4) After elapsing two minutes, make sure that the voltage
falls within 3.5-7mV. In case where the voltage does not
fall within the specified value, readjust it to the values
specified in 3) above.
1) No signal, no load, rated power
Confirm under the room temperature of 20-25
1) INPUT LINE 1 - The output at the
input terminal side shall be +20dBm
as a standard.
The CH to be measured shall be terminated at 10k
Standard value
More than
210W/8 (41.0V)
192mV +/- 10mV
Less than +/- 1mV
20Hz Less than 0.04%
1kHz Less than 0.04%
20kHz Less than 0.06%
Line1
to
Line2
Line1
to
Line5
100Hz
1kHz
10kHz
Vol. 99. 5
Vol. 99. 5
Vol. 69. 5
Vol. 44. 0
Vol. 99. 5
45.6dB 1dB
45.6dB 1dB
33.4dB 1dB ATT ON
31.0dB 1dB
5.8dB 1dB
45.6dB 1dB
Less than 10mV
Less than 0.4mV
1) Line 1
2) Base hum
Input short
Volume min.
1. List of measuring devices
Measuring devices : Electronic voltmeter
Oscilloscope
Low-frequency transmitter (50Hz-20 kHz of transmitting frequency and output of 0
dBs at the 600 terminal)
Distortion factor tester (with a built-in band path filter)