Maintenance
35
7.3.2.4
Install the upgrade EPROMs into the sockets on the DU PWA.
Step 1. Install the U13 upgrade. For Display Unit versions 001.xxx, Place part
number 137353-01 into the U13 socket on the PWA. For Display Unit versions
002.xxx, Place part number 145703-01 into the U13 socket on the PWA. Be
sure that the notched end of the IC is matched to the notched end of the socket.
Ensure that the IC is firmly seated in the socket.
Step 2. Install the U14 upgrade. For Display Unit versions 001.xxx, Place part
number 137354-01 into the U14 socket on the PWA. For Display Unit versions
002.xxx, Place part number 145703-01 into the U13 socket on the PWA. Be sure
that the notched end of the IC is matched to the notched end of the socket.
Ensure that the IC is firmly seated in the socket.
If you are not replacing the LCD module then skip section 7.3.2.5 and proceed to
section 7.3.2.6.
Summary of Contents for 3500/93
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