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Appendix H. Changing the CR10's RAM or PROM Chips
H-2
H.3 Installing New PROM
The PROM chip is found at location C8 on the CR10 CPU board, (see Figure
H-2). With a small flat screw driver, gently pry out the PROM chip and replace
it with the new one. The new chip should be installed so that the notched end is
towards the nearest card edge. Before pushing the chip into the socket make
certain that all the pins are seating correctly. After installing the chip check for
pins that may be bent or not making contact. If you notice a bent pin, remove
the chip, carefully straighten it and repeat the installation procedure.
To make certain that the new chip is installed correctly enter the CR10 *B
mode, and advance to the second window. This window displays the PROM
signature. The five digit number in the window should match the PROM
signature given with the new PROM documentation. If the numbers are
different disassemble the CR10 and look for pins that are bent or not firmly
seated.
FIGURE H-1. Disassembling CR10
Summary of Contents for TGT1
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