User Manual

www.redbackaudio.com.auRedback® Proudly Made In Australia14
Redback® A 4270/80 Four Zone Paging PA Amplier
17.0 DIP SWITCH SETTINGS
These switches affect the alert/evac triggers on the rear of the amplier.
Switch 1: The Alert and Evac contacts can be set to either continuous or momentary operation.
In continuous mode the alert/evac tone will continue while the corresponding rear contact is triggered.
In momentary mode the alert/evac tone will continue to sound after a momentary trigger of the rear contact.
1 - ON: continuous operation of alert/evac contacts
1 - OFF: momentary operation of alert/evac contacts
Switches 2 - 4 Evacuation Timer Settings:
These switches control the time period before the unit switches from the alert, to the evac tone when the Alert is triggered
by the rear contact. This time period can be switched from 30 seconds to 180 seconds in 30 second increments.
Sw2 = ON, Sw3 = OFF, Sw4 = OFF - Changeover = 30 Sec
Sw2 = OFF, Sw3 = ON, Sw4 = OFF - Changeover = 60 Sec
Sw2 = ON, Sw3 = ON, Sw4 = OFF - Changeover = 90 Sec
Sw2 = OFF, Sw3 = OFF, Sw4 = ON - Changeover = 120 Sec
Sw2 = OFF, Sw3 = ON, Sw4 = ON - Changeover = 150 Sec
Sw2 = ON, Sw3 = ON, Sw4 = ON - Changeover = 180 Sec
Note: Setting all switches 2 - 4 to OFF deactivates the switchover function.
18.0 FIRMWARE UPDATE
It is possible to update the rmware for this unit by downloading updated versions from www.altronics.com.au or
redbackaudio.com.au.
To perform an update, follow these steps.
1) Download the Zip le from the website.
2) Remove the SD card from the amplier and insert it into your PC. (Follow the steps on page 11 to open the SD card).
3) Extract the contents of the Zip le to the root folder of the SD Card.
4) Rename the extracted .BIN le to update.BIN.
5) Remove the SD card from the PC following windows safe card removal procedures.
6) With the power turned OFF, insert the SD card back into the amplier.
7) Turn the amplier ON. The unit will check the SD card and if an update is required the amplier will perform the update
automatically.
19.0 TROUBLESHOOTING
If the REDBACK Phase 4 amplier fails to deliver the rated performance, check the following:
No Power, No Lights
Make sure amplier power switch is on. Make sure mains power switch is on at the wall. Check the mains and DC fuse.
Replace with only the correct type and rating. Over rated fuses with invalidate warranty.
Distorted Output
Check that the speaker type is correct for the output that you are using (ie. 100V line). Check for any short circuits on the
speaker line.
Very Low Output Volume
Make sure that the input is the correct level (check for shorted connectors). Check for any short circuits on the speaker
line.
Check if signal LED on the front panel is lit to indicate there is signal. If it is not lit there is no signal present.
Continually Blows Fuses
Make sure that the speaker line is not shorted. Check speaker types, ratings and if on correct output.
Amplier Keeps on Cutting In & Out
Make sure that there is adequate ventilation around the amplier. Check the vent slots on the front,top and sides are not
covered or blocked and the fan on the rear is functioning correctly. Check also speaker types, ratings and for any short
circuits on the speaker line.