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Corrective Maintenance
CSA 803C Service Manual
6Ć51
A15 Memory Management Unit (MMU) Board
See Figures 6Ć4, 6Ć7, 6Ć20, and 6Ć32 for board, connector, screw, and index
locations.
Remove and replace the A15 MMU board as follows:
ăStep 1:ă
Remove the three Torx head screws that secure the CRT cover,
and then remove the CRT cover.
ăStep 2:ă
Remove both ofthe plastic board guides from the top ofthe
card cage. The guides are retained by two small catches located in two
holes in the left bracket ofthe card cage. The other ends ofthe guides
contain slots attach to the edge ofa metal bracket. Both ends ofthe
guides can be pried loose.
ăStep 3:ă
Remove connectors J52, J53, J57, and J83 from the A15 MMU
board. Note the position ofmultiĆpin connector index triangles to ensure
that you can correctly replace these connectors.
ăStep 4:ă
Lift the white, hinged tabs at the front and rear edges of the A15
MMU board. Pull the tabs upward until the A15 MMU board separates
from the A13 Mother board.
ăStep 5:ă
Remove the A15 MMU board.
To replace the A15 MMU board, perform the previous steps in the 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 P101 is seated on the A13 Mother board
connector. Push down firmly on the A15 MMU board to seat this
connector on the A13 Mother board.
Summary of Contents for CSA 803C
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Page 33: ... 2Ć3 CAUTION ...
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Page 137: ... 6Ć1 WARNING ...
Page 138: ... 6Ć2 CAUTION ...
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Page 235: ... 6Ć99 ST1 LSB ST2 ST3 ST4 MSB ST5 Test Running ST6 Test Failed Status LEDs ...
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Page 280: ...Replaceable Parts Mechanical Parts List 10Ć20 1 2 3 4 5 6 Figure 10Ć7 ăAccessories ...