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Corrective Maintenance
CSA 803A Service Manual
6Ć49
A14 Input/Output (I/O) Board
See Figures 6Ć4, 6Ć7, 6Ć19, and 6Ć32 for board, connector, screw, and index
locations.
Remove and replace the A14 I/O board as follows:
ăStep 1:ăRemove the three Torx head screws that secure the CRT cover,
and then remove the CRT cover.
ăStep 2:ăRemove both of the plastic board guides from the top of the
card cage. These guides are retained by two small catches located in
two holes in the left bracket of the card cage. The other ends of the
guides contain slots that attach to the edge of a metal bracket. Both
ends of the guides can be pried loose.
ăStep 3:ăRemove connectors J72, J77, J78, and J90 from the A14 I/O
board. Note the position of multiĆpin connector index triangles to ensure
that you can be correctly replace these connectors.
ăStep 4:ăLift the white, hinged tab at the upper, front edge of the board.
Pull the tab upward until the A14 I/O board separates from the A13
Mother board.
ăStep 5:ăRemove the A14 I/O board.
To replace the A14 I/O board, perform the previous steps in reverse order.
NOTE
Insert the board edges into the plastic guides at each end of the
card cage. Lower the board into position.
Ensure that connector P105 is seated on the A13 Mother board
connector. Push down firmly on the A14 I/O board to seat this
connector on the A13 Mother board.
WARNING
A lithium battery (BT130) is mounted on the A14 I/O board. Be
careful when placing the A14 I/O board on metal surfaces. If some
IC or battery leads are shorted, the battery may discharge or overĆ
heat and vent. (You can use plastic standoffs to prevent short
circuits.) This battery requires special handling for disposal.
Refer to the instructions on Lithium Battery Disposal and First Aid
earlier in this section.