Simplex 4100 - Speech Microphone Level Adjustment; Figure 24 Speech Adjustment

SIMPLEX 4100 EWIS Page 69
INSTALLATION MANUAL
Document No.: 4100-M011 March 1998 Issue 1.0
6.3 SPEECH MICROPHONE LEVEL ADJUSTMENT
Note: There is no adjustment for the MECP microphone or the SECP microphone
levels.
There is an adjustment facility
available for a remote microphone if
fitted.
To adjust the remote microphone:-
(a) Locate R1 variable resister on
the pre-amplifier board 002 –
064. (See Figure 24)
(b) Use a screwdriver to adjust
variable resistor to required
output level.
• Turn the variable resistor
clockwise to increase
volume.
• Turn the variable resistor
anti-clockwise to decrease
volume.
Figure 24 Speech Adjustment
R1
Remote
Mic Adjust