Nexo NXAMP4X1, Service Manual

Page: 58 / 123

NXAMP4x1
58
Press the [B] button to exit the test program, and the
NXAMP enters the ordinary mode.
17 CALIBRATION
CH2 OUTPUT SIGNAL OK ?
Adjust the input signal voltage so that the output voltage
obtained at the channel 1 output terminal is 24 Vrms (=
+29.8 dBu), and press the [B] button.
The output voltage monitor is automatically calibrated,
and the following display appears.
Adjust the input signal voltage so that the output voltage
obtained at the channel 2 output terminal is 24 Vrms (=
+29.8 dBu), and press the [B] button.
The output voltage monitor is automatically calibrated,
and the following display appears.
17 CALIBRATION
CH3 OUTPUT SIGNAL OK ?
Adjust the input signal voltage so that the output voltage
obtained at the channel 3 output terminal is 24 Vrms (=
+29.8 dBu), and press the [B] button.
The output voltage monitor is automatically calibrated,
and the following display appears.
17 CALIBRATION
CH4 OUTPUT SIGNAL OK ?
Adjust the input signal voltage so that the output voltage
obtained at the channel 4 output terminal is 24 Vrms (=
+29.8 dBu), and press the [B] button.
The output voltage monitor is automatically calibrated,
and the following display appears.
17 CALIBRATION
CH1 CONNECT 8 OHM LOAD
Connect the 8 ohms resistor to the channel 1 output ter-
minal.
Adjust the input signal voltage so that the output voltage
obtained at the channel 1 output terminal is 24 Vrms (=
+29.8 dBu), and press the [B] button.
The output current monitor is automatically calibrated,
and the following display appears.
17 CALIBRATION
CH2 CONNECT 8 OHM LOAD
Connect the 8 ohms resistor to the channel 2 output ter-
minal.
Adjust the input signal voltage so that the output voltage
obtained at the channel 2 output terminal is 24 Vrms (=
+29.8 dBu), and press the [B] button.
The output current monitor is automatically calibrated,
and the following display appears.
17 CALIBRATION
CH3 CONNECT 8 OHM LOAD
Connect the 8 ohms resistor to the channel 3 output ter-
minal.
Adjust the input signal voltage so that the output voltage
obtained at the channel 3 output terminal is 24 Vrms (=
+29.8 dBu), and press the [B] button.
The output current monitor is automatically calibrated,
and the following display appears.
17 CALIBRATION
CH4 CONNECT 8 OHM LOAD
Connect the 8 ohms resistor to the channel 4 output ter-
minal.
Adjust the input signal voltage so that the output voltage
obtained at the channel 4 output terminal is 24 Vrms (=
+29.8 dBu), and press the [B] button.
The output current monitor is automatically calibrated,
and the display returns to the test menu screen.
(If an error occurs, “ERROR” appears and the test pro-
gram is stopped.)
4-18. STANDBY test
00 CHOOSE TEST < >
18 STANDBY
Press the [B] button to enter the standby mode, and the
following display appears.
18 STANDBY
Measure the primary power consumption, and check that
the measured value is 23 W or less. Press the [B] button
for one second or more, and the display returns to the
test menu screen.
4-19. QUIT (Exit the test program)
00 CHOOSE TEST < >
19 QUIT
Input the 1 kHz, +10 dBu sine wave to the channel 4 in-
put terminal.
Adjust the ENCODER so that the output voltage obtained
at the channel 4 output terminal is +39.1 dBu, and press
the [B] button.
The analog output level is automatically calibrated, and
the following display appears.
17 CALIBRATION
CH1 OUTPUT SIGNAL OK ?