PRELIMINARY
Telonics PA-4200 Power Amplifier 3
PA-4200 STEREO POWER AMP CONTROL FUNCTIONS,JACKS,&INDICATORS:
FRONT PANEL
AC Power Switch This is the main power switch for the system. This switch also controls the AC
receptacle on the rear panel, the 24 VDC output for the Telonics preamps (rear
panel), and the 24 VDC output for FP-100 Foot Pedal (front panel). Eliminates
the need for a power strip in 3U rack systems.
Blue LED The blue LED will indicate that the main power is turned on.
Standby Switch This switch allows control of the AC power to the power amp alone, independent
of the system power. When placed in the Standby mode it allows for quicker cool
down of the amplifier if needed. This switch must be on in normal use as it
effectively “mutes” the power amplifier section in the off position.
Thermal
Management Status
The Thermal Management Status indicates the temperature status of the power
amplifier. The LEDs indicate a low (green), medium (yellow), or high (red)
temperature range.
The LEDs will also indicate a fan speed out of specification condition as
described later, in the Thermal Management System; Fan Speed out of Spec
Indication paragraph.
Green LED The green LED will blink; on for a short time then off, once a second while the
temperature is below the Low setting. This “wink” (short blink, once per second)
lets you know that the Thermal Management System is working. As the
temperature increases the green LED will come on solid while the temperature is
at or above the low setting.
Yellow LED The yellow LED will come on solid if the temperature is at or above the medium
set point.
Red LED The red LED will come on solid if the temperature is at or above the high set
point.
R Input Level This is an input attenuator for the right audio channel. Fully clockwise will allow
maximum output from the amplifier.
L Input Level This is an input attenuator for the left audio channel. Fully clockwise will allow
maximum output from the amplifier.
LED Light Only This 1/4” jack powers up the optional LED light bar. CAUTION: NO AUDIO
CABLES SHOULD BE PLUGGED INTO THIS JACK.
24VDC Output This jack provides an isolated 24 volts DC to power up the MVP600 foot pedal.
This jack accepts a special twist lock plug for a secure connection of power to the
pedal.
