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Mircom LT-1018 QAA-5230 Series Operating instructions

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LT-1018 Rev. 3
April 2014
QAA-5230-70/25
QAA-5230S-70/25 and
QAA-5230S-525-70/25 Amplifiers
Voltage Selection and Backup Amplifier Instructions
Molex Plug Locations
The QAA-5230, QAA-5230S and QAA-5230S-525 Ampliers may operate as 70V or 25V ampliers. THE DEFAULT
VOLTAGE IS 70V. To change the amplier to 25V, remove the orange molex plugs (labelled MD-787) found in J8 and
J9 and replace them with the blue plugs (labelled MD-788) provided with the amplier, one blue mo
lex plug into J8 and
one into J9. Refer to Figure 1 below for molex plug locations. Also, for 25V amplier, change the fuses (provided) as
described below.
Figure 1: 70V/25V Molex Plug Locations and Fuse Selection
DRAOBREHTOM
ROTCENNOC
CAPACITORS
XMFR
HEAT SINKHEAT SINK
XMFR
SPEAKER
TERMINALS
RELAYS
J9 J8
FOR AMPLIFIERS TO OPERATE AS 25V, REMOVE ORANGE MOLEX PLUGS
LABELLED MD-787 FROM J9 AND J8 AND REPLACE WITH BLUE MOLEX PLUGS
MARKED MD- 788, ONE INTO J8 AND ONE INTO J9.
QAA-5230-70/25
QAA-5230S-70/25 AND
QAA-5230S-525-70/25 AMPLIFIERS
CHANGE FUSES
FOR 25V Amplier
(Fuses are located at
the bottom of the
board and clearly
marked F3, F4, F5 and F6)
FOR QAA-5230S-25:
Change fuses F3 and F6 to 1.25A
FOR QAA-5230S-525-25:
Change fuses F4 and F5 to 1.5A
and fuses F3 and F6 to 0.75A
LT-1018 Rev. 3
April 2014
Backup Amplifier
The QAA-5230, QAA-5230S and QAA-5230S-525 Amplifiers may be used as a backup amplifier. One backup is required
per system or node. To use one of these amplifiers as a backup, the molex connector MD-789 packaged with the amplifier,
must be placed over the pins of J10 as shown in figure below.
Note: BACKUP AMPLIFIER IS ONLY AVAILABLE ON THE FIRST ZONE A.
CAPACITORS
XMFR
HEAT SINKHEAT SINK
XMFR
RELAYS
J9 J8
81
J10
QAA-5230-70/25
QAA-5230S-70/25 AND
QAA-5230S-525-70/25 AMPLIFIERS
MOTHERBOARD
CONNECTOR
Mount the
molex plug
MD-789 over
the 4 pins at
J10 if using
this amplifer
as a backup.
SPEAKER TERMINALS
i
/