GatesAir Inc. CZF Manual De Usuario
APEX
™
Exciter Incorporating FLO
™
Technology
Theory of Operation
DC Power Distribution
Page: 4-14
888-2604-001
03/08/07
WARNING: Disconnect primary power prior to servicing.
4.5
DC Power Distribution
This material is intended to give an overview of dc power distribution in the APEX exciter.
4.5.1
Main Power Supply
The main power supply is located in the left rear side of the analog (top) section of the
exciter. The main power supply voltages and their destinations are listed in Table 4-3.
exciter. The main power supply voltages and their destinations are listed in Table 4-3.
4.5.2
Digital Deck Power
All power for the digital (lower) deck of the exciter enters the controller board at J6.
Refer to Figure 5-2, on page 5-3. From the controller board the power branches out to the
other digital boards in the following fashion.
other digital boards in the following fashion.
• Controller board to modulator board.
• Controller board to adaptive corrector board to ADC and DAC boards.
• Controller board to external I/O board.
• Controller board to front panel board.
4.5.2.1
Controller Board Power
All power for the digital (lower) deck of the exciter enters the controller board at J6. J6 is
mounted on the chassis side of the board and protrudes through the deck to the top side,
where it receives +5 Vdc from the power supply on pins 9 through 15. The 5Vdc return
(ground) is via pins 1 through 8. This is the 5 Vdc entry on the screen.
mounted on the chassis side of the board and protrudes through the deck to the top side,
where it receives +5 Vdc from the power supply on pins 9 through 15. The 5Vdc return
(ground) is via pins 1 through 8. This is the 5 Vdc entry on the screen.
+5 Vdc is supplied to the following other boards:
• The modulator board.
• The adaptive precorrector board.
• The external I/O board.
• The front panel display board.
The +5 Vdc also operates the 3.3 volt dc to dc converter. +3.3 Vdc from this board is
supplied to the following boards:
supplied to the following boards:
• The external I/O board.
• The front panel display board.
Table 4-3 Exciter Power Supply Voltages
Voltage
Use
PS Jack and Pin
Destination Jack and Pin
+5 Vdc
Power for digital tray
SK3 pin 2
Controller, J6 pins 10 - 13
Common for +5 V
SK3 pin 1
Controller, J6 pins 1 - 4
+15
Power for analog tray
SK2 pins 1 - 2
UDC Interface, J4 pins 1 - 2
-15
Power for analog tray
SK2 pin 6
UDC Interface, J4 pin 6
Common for +/- 15 Vdc
SK2 pins 3 - 5
UDC Interface, J4 pins 3 - 5
+15 Vdc Float
Fan power
SK2 pin 8
UDC Interface, J4 pin 8
Common for +15 Vdc Float
SK2 pin 9
UDC Interface, J4 pin 9