AT&T Map/40, Руководство пользователя

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4-2
Performing the Upgrade
Removing Old Circuit Cards
1. Follow the procedures in Chapter 2 to power down the MAP/40, remove
the MAP/40 dress cover, card cage access panel, and card retaining
bracket.
2. Remove the keyboard/reset and communications port cables from the
headers of the 386 CPU. Note that the keyboard/reset cable is marked
“P303” and the communication port cable is marked “P302” on the 386
CPU card. If for some reason your cables are NOT identified, you should
mark your communication port cable at this time.
3. Remove the 386 CPU card from slot #9 in the MAP/40 following the stan-
dard removal procedure found in Chapter 10 of MAP/40 Voice Processing
Hardware Installation , 585-350-109.
4. Remove the video card in slot #10 to allow ease of assembly for the other
parts of this kit. Take note of any external connections. You will need to
reassemble those connections at the completion of this upgrade.
5. Since you will upgrade this MAP/40 to SCSI, remove the tape and IDE con-
trollers cards at this time.
a. Locate the IDE disk controller in slot #12.
b. Locate the tape controller card in slot #11.
c. Disconnect the cables from each and separate the floppy drive and
disk activity cables from the IDE cables. The floppy cable has a 34-
pin conductor ribbon attached to the connector nearest the face-
plate, and the disk activity cable is attached to the 4-pin header on
the opposite side of the card.
d. The disk activity cable will be connected to the new SCSI controller
card after it is installed. Should this cable become accidentally dis-
connected from the backplane, it can be reconnected to J19. See
Figure 4-2.
e. Discard the floppy cable since a new, longer cable is provided as
part of the kit.
f. Remove the circuit card retaining screws on top of each card’s face-
plate and save the screws.
g. Remove the tape controller card and place it in a safe area.
h. Remove the IDE controller card. It is small and may be hard to
grasp.
!
WARNING :
Be careful when removing this card. Although it is difficult to grasp, you do
NOT want to damage your platform in your attempts to remove it!