Pub. 42004-730D
ICS Page/Party
®
AC Plug-in Amplifiers
Page 13 of 21
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Transmit Level
To adjust the signal level from the handset to the page or party lines:
1.
Remove the amplifier from the enclosure and place it on a stable surface.
2.
Open the amplifier (see the Open and Close the Amplifier section).
3.
Adjust the
LINE
ADJ
potentiometer,
R34
, on the main PCBA, to change the transmit level.
Receiver Volume
To adjust the receiver volume:
1.
Remove the amplifier from the enclosure and place it on a stable surface.
2.
Open the amplifier (see the Open and Close the Amplifier section).
3.
The receiver volume potentiometer,
R5,
on the main PCBA, adjusts the signal level to the handset
receiver from the page or party lines.
N
OTE
:
It does not adjust the signal level to the Model 701-904ICS auxiliary headset.
ALS Minimum Level
The ALS minimum level is the lowest speaker output level that the station will maintain. The factory
default setting for minimum level is 4.0 watts nominal into an 8-ohm load. To set the ALS minimum
level:
1.
Remove the amplifier from the enclosure and place it on a stable surface.
2.
Connect the No. 10440-002 Maintenance Cable (
purchased separately
).
3.
Turn the speaker volume potentiometer,
R91
, on the main PCBA, fully counterclockwise (see Figure
14).
4.
Listen for a single beep from the speaker, indicating the speaker amplifier is in the
minimum level
adjustment
mode.
If the page line is in use immediately after hearing the beep tone
: Use the page signal as the reference
to adjust the speaker volume minimum level.
If the page line is inactive following the beep tone
: A continuous tone activates to make the minimum
level adjustment. Once the tone activates, the amplifier ignores all page line activity until completion
of the adjustment.
5.
Use the test tone as a reference to adjust the speaker volume potentiometer,
R91
, to the desired
output.
The test tone automatically shuts off 5 seconds after the last adjustment.
ALS Offset Level
The ALS offset level allows the output of the speaker amplifier to maintain a set difference or
offset
between the ambient noise level and the speaker output level. To set the ALS offset level:
1.
Remove the amplifier from the enclosure and place it on a stable surface.
2.
Connect the No. 10440-002 Maintenance Cable (
purchased separately
).
3.
Turn the speaker volume potentiometer,
R91
, (on the main PCBA) fully clockwise (see Figure 14).
4.
Listen for two beep tones, indicating the amplifier is in the offset adjustment mode.
