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Mircom LT-1019 QAA-5160 70V Amplifier Operating instructions

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LT-1019 Rev. 2
April 2014
QAA-5160-70/25
Single 60 Watt Amplifier
Voltage Selection and Backup Instructions
Molex Cable Location
The QAA-5160 Amplifier may operate as a 70V or 25V amplifier. THE DEFAULT VOLTAGE IS 70V. To change the
amplifier to 25V, remove the orange molex cable (labelled MD-790) between J8 and J9 and replace it with the blue molex
cable (labelled MD-791) provided with the amplifier, connecting J8 and J9. Refer to Figure 1 below for molex cable
location.
Figure 1: 70V/25V Molex Cable Location
MOTHERBOARD
CONNECTOR
CAPACITORS
XMFR
HEAT SINKHEAT SINK
XMFR
SPEAKER
TERMINALS
RELAYS
J9 J8
FOR AMPLIFIER TO OPERATE AS 25V, REMOVE ORANGE CABLE LABELLED MD-790
FROM J9 AND J8 AND REPLACE WITH BLUE CABLE MARKED MD- 791 BETWEEN J9
AND J8.
QAA-5160-70/25 AMPLIFIER
LT-1019 Rev. 2
April 2014
Backup Amplifier
The QAA-5160 Amplifier may be used as a backup amplifier. One backup is required per system or node.
To use this amplifier 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.
CAPACITORS
XMFR
HEAT SINKHEAT SINK
XMFR
RELAYS
J9 J8
81
J10
QAA-5160-70/25 AMPLIFIER
MOTHERBOARD
CONNECTOR
Mount the
molex plug
MD-789 over
the 4 pins at
J10 if using
this amplifer
as a backup.
SPEAKER TERMINALS
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