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5 . 4
MEMORY MANAGEMENT UN I T (MMU)
The MMU plugs into the expansion board and into a interface assembly in
stal led on the planar board in p lace of the 6 8000 minicomputer chip .
Figure 5 - 38.
The MMU must occupy the s lot immediately above the p l anar
See Figure 5 -5 .
board.
5 . 4 . 1
REMOVAL
1 .
Remove cover .
2 .
Remove the MMU by grasp ing the ejector lever at each s ide of the
board and pul l ing toward the rear of the proces sor .
5 . 4 . 2
REPLACEMENT
1 .
S l ide the MMU board into the s lot immediately above the planar board
unt i l the ej ector levers at each s ide hook onto the s ide frame o f
the processor .
front of the processor unt i l the MMU board is firmly s eated in the
expansion board and interface assembly .
2 .
Replace processor covers , display/bridge assemb l y , and back p l at e
connectors .
See Sect ion 5 . 1 . 2 , "Repl acement . "
5 . 5
POWER S U P P LY
The power supply is located in the processor unit between the expans ion
board and the printer/plotter . See Figure 5 - 5 .
5 . 5 . 1
REMOVAL
1 .
Remove the covers . See Section 5 . 1 . 1 , "Removal . "
2 .
Dis connect a l l the harnessed connectors from the printer/plotter
control board . See Figure 5 -6.
See Section 5 . 1 . 1 , "Removal . "
Grasp the ej ector levers and push forward toward the
Removal and Replacement Procedures 5 - 1 1
See Figure 5 - 8 .
See Figure 5 -3 8 .
See
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