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8. COMMON AUDIO BUS. A single audio source, such as from a connected preamp, can drive one or
more of the amplifier pairs simultaneously, as desired, from this Bus. Any of the amplifier pairs can
be switched to the COMMON AUDIO BUS at will by use of the COMMON BUS / LOCAL Switch (see
also item #6).
9. LEVEL (System) RESET Button. Pressing this button 2 times within 1 second restores all Factory
Default settings. The Factory Defaults for all channels are as follows:
- Input Level set to 1 Volt rms for 35 Watts output.
- Balance centered.
- Mute OFF.
- MAX-V Cleared.
- IR Code Group set to A0.
- CI (control in) disabled. Chantes CI control to IR control of Standby ON/OFF. (CI enables when +5
to +30 VDC is applied to CI for 2 or more seconds. See also item #11)
NOTE: The PA1235 will always return to last set values (plus any unaltered factory defaults) after main
power shut down or after any power interruptions.
10. FUSE. When required, replace only with a fuse of the same type and rating:
120 V Version: 10 AMP 220 VAC, SLOW BLOW.
240 V Version: 5 A Time-Lag 250 VAC.
Replacement with a fuse of higher rating will not protect the amplifier and will void the warranty.
11. IR IN, STATUS, GROUND and CI Terminals. Removable 4-Terminal screw type plug-in connector.
IR IN = IR Signal. Receives IR Input from Xantech IR Receivers, Smart Pads, Connecting Blocks, etc.
STATUS Out. Delivers a constant +12 VDC output (9V @ 70 mA) with ON condition. 0 Volts output
= OFF (Standby).
GROUND. Ground for IR IN, STATUS out & CI in.
CI = Control Input. Use for control of Standby ON/OFF of amplifier pairs, if desired, instead of by IR.
After CI is enabled (see item #9), 0 Volts input = OFF (Standby) condition and +5 to +30 VDC input
= ON condition. (12V in draws 16 mA).
NOTE: All plug-in connectors accept wire sizes from 24 to 12 gauge.
Fig. 3 PA1235 Rear Panel – Features and Functions
REMOTE MASTER
ON/OFF CONTROL
5-30 VOLTS DC
+--
N/C
GROUND
STATUS
IR IN
COMMON AUDIO
BUS
AC LINE
ON/OFF
COMMON BUS
LOCALLEFT RIGHT
STEREO
MONO
BRIDGED
CI
GROUND
STATUS
IR IN
LEFT RIGHT
SPEAKER
+-- --+
+
BRIDGED
--
1
COMMON BUS
LOCALLEFT RIGHT
STEREO
MONO
BRIDGED
CI
GROUND
STATUS
IR IN
LEFT RIGHT
SPEAKER
+-- --+
+
BRIDGED
--
2
COMMON BUS
LOCALLEFT RIGHT
STEREO
MONO
BRIDGED
CI
GROUND
STATAUS
IR IN
LEFT RIGHT
SPEAKER
+-- --+
+
BRIDGED
--
3
COMMON BUS
LOCALLEFT RIGHT
STEREO
MONO
BRIDGED
CI
GROUND
STATUS
IR IN
LEFT RIGHT
SPEAKER
+-- --+
+
BRIDGED
--
4
COMMON BUS
LOCALLEFT RIGHT
STEREO
MONO
BRIDGED
CI
GROUND
STATUS
IR IN
LEFT RIGHT
SPEAKER
+-- --+
+
BRIDGED
--
5
FUSE
10 AMP
SLOW BLOW
LEFT RIGHT
MODE
WARNING
TURN POWER
OFF BEFORE
CHANGING
MODES
WARNING
TURN POWER
OFF BEFORE
CHANGING
MODES
WARNING
TURN POWER
OFF BEFORE
CHANGING
MODES
COMMON BUS
LOCALLEFT
STEREO
MONO
BRIDGED
CI
GROUND
STATUS
IR IN
LEFT RIGHT
SPEAKER
+-- --+
+
BRIDGED
--
6
CAUTION
RISK OF ELECTRIC
SHOCK. DO NOT OPEN
MODE
MODEMODEMODEMODE
®
SYLMAR, CA
AC 120V 60 HZ
4 AMP
LEVEL
RESET
RIGHT
--
0
5
7
6
7
6 5
7
6
8 9
10
11
12
13
14
15 16
17
18
11
12
11
12
11
12
11
12
11
12
5
7
6 5
7
6 5 5
7
6
PA1235