Vanguard 6500 PLUS, Руководство по установке

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2-64 Installation
Replacing Processor Card Components
Replacing PROM Chips
Replace PROM
Chips Follow these steps to replace a PROM chip:
Step Action
1
Remove the card from the nest or enclosure.
2 Loosen and remove the four screws that hold the FLASH module to
the 6500
PLUS
processor card (Figure 2-22).
3
Carefully lift the FLASH module from the 6500
PLUS
processor card.
You may have to wiggle the card until the header pins disengage
from the socket.
4
Locate the PROMs as shown in Figure 2-22. Note the location of the
notch on each chip and, using a standard chip-puller, remove the
PROMs.
This will help you orient the new chips.
Note
Not all four PROM sockets may have PROMs.
5
Insert the new PROMs into the sockets. Be sure that they are oriented
the same way as the old chips.
6 Place the FLASH module on the 6500
PLUS
processor card. Insert the
header pins into the socket.
The pins should seat firmly into the socket, but be careful not to bend
the pins.
7 On the other side of the 6500
PLUS
processor card, use four screws to
secure the FLASH module to the 6500
PLUS
processor card.
Do not overtighten the screws or you may damage the 6500
PLUS
processor card.