7
TROUBLE-
SHOOTING GUIDE
–
Some of the most common problems:
No sound from any channel:
•
Power turned off or system in standby
mode. Check that the module LEDs in
the display window are lit blue.
•
Input connections loose or missing.
Check that all connections are secure.
•
UK version only: The fuse in the
mains plug has failed. Check and
replace if necessary.
No sound from one channel only:
Loudspeaker cable pulled loose. Check all
connections, both at the loudspeakers and
amplifier.
•
Interconnect cable pulled loose or
making poor contact. Check and, if
necessary, un-plug and re-plug all
relevant cables.
•
Protection relay has operated because
of a short circuit loudspeaker wire or
amplifier overheating (see Fault
Condition Indication on Page 6).
Carefully check all wiring after
switching amplifier POWER OFF.
Allow amplifier to cool.
Incorrect operation - some functions not
working:
•
Control processor latched. Switch off
POWER on rear panel and wait for 5
minutes. Then switch POWER on and
switch out of standby. Normal
operation should resume.
Amplifier fails to respond to Smart My
Link® remote commands from Myryad
Preamplifier, Preamp-Processor or
Integrated:
•
My-Link cable is loose or not
connected. Check connections on all
linked units.
Loud buzz or hum:
•
Interconnect cable pulled partially out
of its socket.
•
Defective interconnect cable.
MX POWER AMPLIFIER MODEL NUMBERS
No. of 2x80W modules
No. of 1 x 150W modules
0
1
2
3
4
5
6
7
0
N/A
MXA0151
MXA0152
MXA0153
MXA0154
MXA0155
MXA0156
MXA0157
1
N/A
MXA1151
MXA1152
MXA1153
MXA1154
MXA1155
MXA1156
2
MXA2150
MXA2151
MXA2152
MXA2153
MXA2154
MXA2155
3
MXA3150
MXA3151
MXA3152
MXA3153
MXA3154
4
MXA4150
MXA4151
MXA4152
MXA4153
5
MXA5150
MXA5151
MXA5152
6
MXA6150
MXA6151
7
MXA7150
N/A = Not Available
SPECIFICATIONS POWER RATING
1 x 150W Amplifier Module
8 Ohms:
150 W
Continuous rated power output:.
4 Ohms:
230 W
THD: @ 80% rated power, 8 Ohms, 20Hz-20kHz)
0.02 %
Signal/Noise ratio (A weighted, ref. 150W)
>118 dB
Input sensitivity
(ref. 150W into 8 Ohms)
1.23 V
Input impedance
20 k Ohms / 440 pF
Frequency response
20Hz - 20kHz
±0.2 dB
96kHz
-2 dB
Weight (net)
4.8 kg
The power rating of the MXA Power
amplifier will depend upon the total
number of modules installed,
irrespective of whether they are 1 x
150W or 2 x 80W, as shown in the
table below
.
2 x 80W Amplifier Module
8 Ohms:
80 W
Total
Power rating
Continuous rated power output:
4 Ohms:
120 W
number of
in
THD: @ 80% rated power, 8 Ohms, 20Hz-20kHz)
0.02 %
modules
Volt-Amperes
Signal/Noise ratio (A weighted, ref. 80W)
>116 dB
Input sensitivity
(ref. 80W into 8 Ohms)
900 mV
1
215 VA
Input impedance
60 k Ohms / 440 pF
2
430 VA
Frequency response
20Hz - 20kHz
± 0.2 dB
3
645 VA
96kHz
-2 dB
4
860 VA
Weight (net)
4.8 kg
5
1070 VA
6
1285 VA
Physical Specification – MXA Power Amplifier
7
1500 VA
Dimensions
(width x height x depth)
436 x 190 x 479 mm
Weight
(net – 7 modules installed)
44 kg
Power Requirements
Voltage
(set by internal wiring)
120 or 230 V
