DAA2 & DAX — P/N 53265:A1 8/24/2011 63
DAX Installation DAX Digital Audio Amplifiers
A backup amplifier can support one failed primary amplifier at a time. Should another primary
amplifier also fail, depending on load, the backup amplifier may also fail, generating an
AMPLIFIER LIMIT trouble until the load is reduced or reset.
Figure 3.22 One-to-one or One-to-Many Backup Using BKUP Terminal Blocks
DAP A+
DAP A-
REF A
DVC
TB2
TB3
DAP B+
DAP B-
REF B
DAX
PRIMARY
DAX
BACKUP
Optional Class
A Return
Digital Signal
from DVC
DAPA DAPB
+
+
-
SHLD
-
SHLD
TB4
TB10
TB5
TB11
+
-
SHLD
+
-
SHLD
+
-
SHLD
+
-
SHLD
DAPA DAPB
+
+
-
SHLD
-
SHLD
TB4
TB10
TB5
TB11
+
-
SHLD
+
-
SHLD
+
-
SHLD
+
-
SHLD
To next primary
amplifier for one-
to-many backup*
BKUP2
TB 11
Speaker Circuit
OUT2, TB5
To next primary
amplifier for one-
to-many backup*
BKUP1
TB 10
Speaker Circuit
OUT1, TB4
*Note: No end-of-line resistor is necessary at
the last primary amplifier backup terminal.
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