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P81537 G
Sheet 4 of 5
PRE-AMP
-2
4
V
T-
IN
R-
IN
GND
R-
OUT
T-
O
U
T
1 2 3 4 5 6
TO 24VDC
POWER SUPPLY
INPUT TO
AUDIO
SOURCE
OUTPUT TO
SPEAKER
AMPLIFIERS
Figure 7:
Simplified Schematic And Connection Diagram
OPERATION:
1.
Set PRM-150 volume control to position #5.
2.
Adjust each Speaker Amplifier's volume control to the desired volume level.
3.
If the desired volume level cannot be obtained at any or all speaker-amplifiers, then:
(A) Increase the PRM-150 volume control setting until the desired volume level is obtained at the speaker-amplifier(s) which
had the least volume.
(B) Readjust the other Speaker Amplifier volume controls, as required.
TROUBLE SHOOTING:
CONDITION CHECK
1. No audio output to Speaker Amplifiers.
1. Volume control turned up (clockwise).
2. Check presence and polarity of -24VDC and GND.
3. Check audio presence and level on T-OUT and R-OUT at PRM-150,
and if necessary also at the Speaker Amplifiers.
4. Check audio presence and level on T-IN and R-IN at PRM-150, and if
necessary at the audio source.
5. Defective unit - Replace.
ANY MATERIAL EXTRAPOLATED FROM THIS DOCUMENT OR FROM WHEELOCK MANUALS OR OTHER
DOCUMENTS DESCRIBING THE PRODUCT FOR USE IN PROMOTIONAL OR ADVERTISING CLAIMS, OR FOR
ANY OTHER USE, INCLUDING DESCRIPTION OF THE PRODUCT'S APPLICATION, OPERATION, INSTALLATION
AND TESTING IS USED AT THE SOLE RISK OF THE USER AND WHEELOCK WILL NOT HAVE ANY LIABILITY
FOR SUCH USE.