Viking 242-2009-632 - Manual (Page 121)

CIRCUIT DESCRIPTION
6-49
March 1999
Part No. 001-2009-600
Pins 21-23 UNUSED
Pins 24/25 +15V ACCESSORY
This DC supply is an output to an external device
through rear connector J1.
Pins 26/58 +15V FILTERED
This DC supply is an output to an external device
through rear connector J1.
Pins 27/59 -5V IN
This is the -5V input from the power supply via
the Controller backplane.
Pins 28-29
+5V IN
Pins 60-61
This is the +5V input to the MPC from the power
supply via the Controller backplane.
Pins 30/62 +15V IN
This is the +15V input to the MPC from the
power supply via the Controller backplane.
Pins 31-32 GROUND
Pins 63-64
This is the ground connection to the MPC from
the power supply via the Controller backplane.
Pin 41-42 UNUSED
Pin 47 READ
Read is used with the MREQ line to read data
from the MPC processor and external memory.
Pin 48 WRITE
Write is used with the MREQ line to write data to
the MPC processor and external memory.
Pins 49-50 UNUSED
Pins 53-55 UNUSED
Pin 56 THERMAL SENSOR
The Thermal Sensor monitors the PA tempera-
ture and creates an alarm condition if the temperature
exceeds the limit.
Pin 57 POWER SWITCH
Pin 57 turns the voltage from the power supply to
the Repeater on and off. This pin is connected to the
on/off toggle switch S508.
6.13.7 P501 EXTERNAL OUTPUTS
Connector P501 contains data and control outputs
to the terminal block on the back of the Repeater cabi-
net. These outputs are connected to other external
devices.
The input and output connectors for the connector
are defined as follows.
Pins 1/17 ALARM 3 OUT +/ALARM 3 OUT -
Pins 2/18 ALARM 4 OUT +/ALARM 4 OUT -
These are outputs to external devices to perform a
specific function.
Pin 3 RX WBAND
Receive Wide Band Audio from the Receiver
audio demodulator through the RF Interface Board.
The typical amplitude is 387 mV RMS (-6 dBm) and
2V DC with Standard TIA Test Modulation into the
receiver.
Pins 4-6 UNUSED
Pin 7 EXT OUT 1
This is an external output to rear connector J1.
Pin 8 RF CLOCK
The clock will control the synthesizer chips and
power control circuit when loading. This pin is a TTL
input from the Controller.