Component Replacement Procedures
Replacing the USIOM Board
10
3.
Remove all plugs connected to the USIOM board (identified by arrows in Figure 6).
4.
Remove the two T15 #8 x 0.3125 screws securing the expansion comm port plate to the bottom of the
console enclosure and set them aside with the comm plate. (see Figure 7).
5.
Remove the two T15 #6 x .375 screws securing the I.S. cover and right side of the USIOM board to the
console chassis (see Figure 10). Set the plastic I.S. cover, the two T15 screws holding the cover aside.
6.
Remove the T15 #6 x 0.375 screw from the lower left corner of the USIOM board (see Figure 9) and set it
aside.
7.
Remove the two T10 #4 x 0.625 screws from the opposite corners of the power supply board and set them
aside (see Figure 8).
8.
With your fingers under the two I.S. sockets and your thumbs positioned on top of them, lift/pry the right side
of the USIOM board out enough to release the USIOM board from the snap-on retaining post between the
two I.S. sockets (see Figure 11).
9.
With the USIOM board now free from the retaining post, swing the right side of the USIOM board toward you
as you lift it free of the chassis.
10. Install the replacement USIOM board by reversing steps 9 through 3 above.
Figure 6. Remove all plugs attached to USIOM board
EB25918024
1
2
3
4
5
6
7
8
9
10
11
12
INTRIN
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MAX. AC
INPUT RATING
S
120/240 Vac, 2.0 A
MAX. RELAY
CONTACT RATING
120/240 Vac, 5A
3
0 Vdc, 5A
FU
S
E RATING, 5A
250 Vac TYPE T
(
S
LO-BLO)
MAX. EXTERNAL
CONTACT CLO
S
URE
CIRCUIT RATING
S
12 Vdc, 0.015A
N
G
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≤
T
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≤
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FOR
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S
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RELAY 2
RELAY 1
RTN
12V
PWR STAT
PWR INT
F1
F2
5A
(SLO-BLO)
F4
5A
(SLO-BLO)
F6 0.75A (SLO-BLO)
F7
