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Issue 2
Alarm, Chime and Aux. Line Output Connections.
Music Mute Control
The amplifier has an internal pre-set VR6 which controls the residual level of background music
during paging. For full muting VR6 should be turned fully clockwise. For partial muting VR6 should
be turned anti-clockwise to suit operational requirements. Once the priority microphone is deselected
the background music level will fade up gently to its original setting. The unit is supplied with muting
set to maximum.
FLOATING LINE OUTPUT
SWITCH
1
2
AFTER MASTER
& TONE CONTROLS
& TONE CONTROLS
BEFORE MASTER
ON
OFF
OFF
ON
NOTE. DO NOT SELECT
BOTH SWITCHES TO ON
1 2 3 4
SWITCH
CHIME SELECTION
3
4
NO CHIME
OFF
OFF
OFF
OFF
ON
ON
ON
ON
1 NOTE CHIME
2 NOTE CHIME
3 NOTE CHIME
CHIME VOLUME
MAX
MAX
ALARM TONE VOLUME
ON
FLOATING LINE OUTPUT
0dB TRANSFORMER ISOLATED
OUTPUT TO FEED SLAVE
AMPLIFIER, TAPE RECORDERS ETC
0V (GROUND)
CONNECTOR
OUTPUT TO FEED
OTHER EQUIPMENT
SEE SWITCH 1&2
ALARM ACCESS, CLOSE
TO 0V TO ACCESS
ALARM TONE GENERATOR
RELAY COIL
AUX MUTE
2
1
3
4
5
6
ALARM TONE
CLOSE TO 0V TO
TIME SWITCH ETC
MUTE AUX INPUT.
CLOSE TO SOUND
MUSIC
MUTE
VR6
PART VIEW OF PRINTED
BOARD CIRCUIT WITH
TOP COVER REMOVED
AUX VOLUME
CONTROL
MAX MUTE
