m_thompson
Veteran Member
I am working on console #3. This one has a 7408, E10 on the display board with a weak low drive on pin 8. Everything downstream seems to work OK, but I will replace it anyway. It has a bad 74153, E19 on the register board. The replacement should be here next week. There are no outputs from this Mux so you can't enter any number larger than 3. There is a problem with the DISP circuitry where it will only display the contents of the AC. I am debugging that now. The 40 pin ribbon cables that connect the panel to the 8316 had several wire-wrap wires tucked into the connector and had masking tape holding them in place. I suspect that the crimped on connectors were not making good connections so they fixed it by adding wires. I will need to make two more sets of ribbon cables.