Mark

All internal box functions are set in the shop. There are no adjustments for line maintenance.

DC power is supplied from three transformer rectifiers.

You can measure voltage at any breaker downstream from each unit. The distribution schematics will give you guidance on how your aircraft is wired.

No. If maintenance does their job right. There’s no degradation, only failures of components. Once the fault has been identified and repaired, the system is 100% functional.

If things are failing, you get flat and blown tires.

Anti-Skid does exactly what its name states. It keeps the tires from skidding. All wheel speeds are monitored. If one has a wheel speed less that the others, it would be treated as a skid and the hydraulic pressure to that brake is reduced (or stopped) until the wheel speeds back up.

Pilots still apply brake pressure as they see fit. The Anti-Skid works without any input from them at all. On a 767 there is no Anti-Skid switch in the cockpit. It's always on.

If the aircraft has Auto-Brakes, it does everything and (not a good idea) the pilots wouldn't have to have their feet on the peddles at all.

rotate.aero/forum/767-ata32/372-ata-32-42-anti-skid

rotate.aero/forum/767-ata32/709-wheel-speed-transducer-output
 

Has anybody gone out a checked the pins on the aircraft?????

Looking at manuals isn't going to fix the problem.

Get a meter and your wiring prints and check the parity pins. One is broken. Find it. Fix it.

I cannot answer your question on the hex codes.

Those are in your Maintenance Manual.

Any ground pin not associated with power or case ground.

It's never just "one" pin. It's several and their total number (odd or even) is the parity.

If the screen sizes physically match, yes.

Either term is correct. They represent the same instrument.

This is a typical 767 SGU. The pins circled are parity pins. These go to ground, but it doesn't matter if they're hooked to each other also.

You need to find the pins on the prints for your aircraft and find out if one is not connected.....