Maintenance and Service 9-7
Caution
To avoid damage to the CPC circuitry, use electrostatic discharge (ESD)
precautions when removing the cover of the CPC:
# Use only a table top with a grounded conducting surface.
# Wear a grounded, static-discharging wrist strap
Refer to Figures 9-5 and 9-6 and the following instructions to
install an EPROM in a Model 3022A CPC.
Tools Needed
You need a small, flat screwdriver or 28-pin chip extractor, a
Phillips-head screwdriver, a grounded, static-discharging
wriststrap, and an antistatic mat.
1. Remove power from the CPC and from any other instruments
connected to the CPC.
2. Place the CPC on an antistatic mat. If the liquid reservoir is full,
avoid tipping or moving the CPC so that liquid does not spill.
3. Using Figure 9-5 as a reference, remove the following screws on
the CPC. Separate the screws as you remove them so you can
reassemble the CPC correctly.
a. Remove three screws from each side of the CPC top cover and
remove the top cover.
b. Remove the four corner screws from the CPC front panel.
c. Remove the four screws and washers from the CPC front panel
connecting the panel to the side bars.
4. Remove the front panel.
Note: Optional
The CPC front panel is connected to the display board with a
ribbon cable. (The display board is the large circuit board parallel
to the front panel.) As you remove the front panel, you can
disconnect the ribbon cable on the display board, or you can leave
it attached.
5. Find the EPROM on the display board, the large circuit board
parallel to the CPC front panel (Figure 9-6). To remove the old
EPROM from the display board, use a 28-pin chip extractor or
To Next Page
Loading...
Need help?
General
