Simplex 4100 - Pa Volume Adjustment; Figure 23 Amplifier Card Adjustments for PA Adjustments

Page 68 SIMPLEX 4100 EWIS
INSTALLATION MANUAL
Document No.: 4100-M011 March 1998 Issue 1.0
6.2 PA VOLUME ADJUSTMENT
PA volume can be adjusted, using the
variable resistor located on the Amplifier
card.
To adjust the Speaker volume:-
(a) Locate TR2 PA Volume variable
resister on the Amplifier board
8225 or 8250. (See Figure 23)
(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 23 Amplifier Card Adjustments for PA Adjustments
TR1
Master
Volume
TR2
PA
Volume