Watlow CAS - Manual (Page 83)

Troubleshooting
CAS User’s Guide 73
Changing the EPROM
Changing the EPROM involves minor mechanical disassembly and
reassembly of the CAS, but you don't need any soldering or electrical
expertise. The only tools you need are a Phillips head screwdriver and a
small flathead screwdriver.
NOTE
If you change the EPROM, you must perform a No Key Reset for
the EPROM change to take effect. A No Key Reset changes all con-
troller parameters back to their default values, so you must reenter
the desired values from ANASCAN or from the front panel after
you change the EPROM.
1. Power down the CAS. Be sure to take antistatic precautions.
2. Remove the four screws from the sides of the unit’s front panel.
3. Remove the electronics assembly from the case, as shown below.
4. Unscrew the four screws at the corners of the top board and care-
fully unplug this board to access the bottom board (processor
board), as shown below.