I disconnect the purple wire and run a red wire to the the pop bumper, then I add a 1 amp fuse to each coil wire and lastly I replace the tip122s to tip102s. Never had another issue after this.

The purple wire has 50 volts on it. The red wire on the pop bumper has 25 volts on it. A Tip 102 is about 60% stronger than the Tip122. So if reduce the voltage by half and use a more robust transistor you fixed the issue. Also you add one fuse for each coil to minimize board damage if something should go wrong. One amp slow blow works.

This has been talked about before in the F-14 Tomcat owners Club. Check out posts 3235.

Quoted from SUPERBEE:
Hey Grumpy, any way to modify the pin to prevent this from happening ?

Yes, Q-77 and Q-79 on the CPU board can be replaced with a TIP 102 transistor as they are 60% stronger then the factory TIP122. You can remove the ramp and diverters, disassemble it, clean and lubricate all moving parts and replace both coil sleeves. Adjust it according to the Williams service bulletin. http://mirror2.ipdb.org/files/804/Williams_1987_F_14_Tomcat_Service_Bulletin_no_number_undated_to_resolve_binding_diverter_gate_assembly.pdf

You can install a inline fuse for each of the diverter coils on the power wire, 1 amp slow blow fuse. You can add snubber relays for the coils to remove all the stress from the transistor and place it on the relay. You can add a high current driver (TIP 36c) for each coil, this is a higher wattage transistor to take the place of the snubber relay. And the last thing you can do is to remove the high voltage (75 volts) from the two coils and wire them with low voltage (32 volts) from the pop bumper coil.

You only need to do one of the last three items, After this it will never melt down again.

The switches in a row or a column in the switch matrix do not follow any kind of order. The factory wired them which ever way saved them the most wire. What you need to check is if all the rest in a row or a column work, if you find another switch that doesn't work it will help you pin point a location for the broken wire. Also it can still be a bad diode or switch too.