3033-003B Section 3: Electrical
Concordia Xpress Technical Support Manual 3-15
2900-300B
Electrical Enclosure Fan
Operating Voltage: 24Vdc
The fan located in the electrical enclosure is used to maintain air
circulation and cool the heat sinks on the DC power supply board. When
the machine is in TEST ROUTINES, the electrical enclosure fan remains
on. The fan removes heat from the enclosure.
Power Into the Machine
Power into DC Power Supply Board
1. Two legs of 110Vac come into the AC board via JP1 connector
on the backplane.
2. AC travels down lower AC board on traces #15 and #13, through
two 5amp fuses.
3. Power switch is turned on.
4. Voltage travels out traces #1 and #3.
5. One leg of power goes directly to transformer.
6. The other leg goes to the J1 located on the DC power supply
board.
7. J1 and transformer connection are set to the appropriate voltage
(determined at time of installation), and the voltage travels to
transformer.
8. Output of the transformer plugs into JP9 at the backplane, then
into the DC power supply board.
9. Power travels into DC power supply through five 5amp fuses,
#15-19.
10. The DC power supply board converts the AC voltages to many
legs of DC voltage.
11. DC voltages are distributed through the backplane, through JP4.
12. The backplane distributes voltage to the rest of the machine.
Lower AC Drawer: Power Into the Machine
17 15 13 11 9 7 5 3 1
To Jumper Plug
To Transformer
Power In
To relay
for elements
Ground
(via fuse)
(via fuse)
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