JDM
®
6 Zone Public Address Amplifiers
3
FRONT PANEL CONTROLS:
1. MIC/LINE LEVEL:
A. PUSH-TO-TALK (P.T.T. 1) VOLUME / EQ:
Volume knob lets you adjust the volume level of the main
paging mic (suggest C0377) or line source at input 1. BASS
and TREBLE controls let you adjust the equalizer to suit your
surroundings.
B. REMOTE (R.M) 2 VOLUME /EQ:
Volume knob lets you adjust the level of Input 2 and the
Remote Paging Console (A4353). BASS and TREBLE
controls let you adjust the equalizer to suit your surroundings.
C
.
VOLUME 3 / EQ:
This knob lets you adjust the volume level for mic or line Input
3, while the BASS and TREBLE controls let you adjust the
equalizer to suit your surroundings.
IMPORTANT:
If the priority function is activated and you
supply a signal to MIC/LINE 1, then ALL other signals will be
soft muted (pad), including the auxiliary signal at inputs 4 and
5, paging ringer, and the modules (if fitted) in the front panel
slot (CD Player / Radio Tuner). [The jumper shunt (MS2) on
the front PCB is factory set to SLAVE operation. The jump
shunt is located inside the front slot below the module and is
yellow.]
Note:
It is preferred to keep the volume output level at or
below ‘0’ on the LED indicator, while setting the MASTER
volume to the two o’clock position. The speaker volume at
this level could be very loud.
2. LINE LEVEL:
A. VOLUME 4 / EQ:
This knob lets you adjust the volume level for the RCA line
Input 4, while the BASS and TREBLE controls let you adjust
the equalizer to suit your surroundings.
B. VOLUME 5 / EQ:
This knob lets you adjust the volume level for the RCA line
Input 5, while the BASS and TREBLE controls let you adjust
the equalizer to suit your surroundings.
3. PACK EQUALIZER:
BASS and TREBLE
control for pack series.
These Bass and Treble knobs control the bass and treble
signals of the optional tuner or CD player, but only when either is
installed in the front slot of the amplifier.
4. CHIME:
Pushing the CHIME button once will activate the two or four tone
chime. Use the knob to adjust the signal level. This is for pre-
signal or an alert signal. (Set the chime tone pattern by adjusting
the jump shunt MS1 on the front PCB). If the CHIME volume is
set high enough, it will soft mute (pad) all other audio inputs.
5. TELEPHONE:
A. TEL NIGHT RINGER:
Allows you to hear the telephone ring via the speakers in
other zones. Push the button in to activate the feature.
B. PAGING:
Allows you to page someone using a connected telephone
system.
IMPORTANT:
Activate the paging microphone, and the audio
from all other inputs will be muted. The jump shunt (MS2)
on front PCB is factory set to SLAVE position to give priority
to paging operations. If the priority dip-switches on the rear
panel for inputs 1, 2, are 3 and set to on, these will then be
given priority over the paging microphone function.
6. SIREN:
This is for emergency situations. Two sounds are offered
depending on which button is pressed: Alert siren curve (repeat)
Alert siren flat (continuously).
7. MASTER:
The output volume for the amplifier, which is a mixing of volumes
from all input devices, is finally governed by the MASTER
volume control knob. When the two LED lights are lit, they signal
problems with the device.
8. SPEAKER ZONES & A.T.T:
1-6 speaker zones can each be switched on independently. The
attenuator knobs control the output signal for the speaker zones.
Any combination of speakers can be activated at any given time.
9. ALL CALL:
Press this button to direct the source audio to all speaker zones
at once.
10. POWER:
Press switch to turn unit on or off.
Figure 1:
Front Panel Controls
