Hi Rick,
Yes, it definitely looks like the Modulation Distribution Board is faulty. The label on the board says 08920-60409 with a sub number A-3308-10
The Serial I/O card on the 8920A is also proven faulty as I can swap it into the 8921A and can replicate the fault; swapping it back creates the fault on the 8920 again.
The A7 Controller is also faulty on the 8920A. That has the numbers, 08920-60307, Sub Number A3303-10.? The 8920A does not boot to "all Tests passed" but the screen is active and displays the following:-
" Non recoverable Firmware Error" the two lines below read
* $ header: Syshlp.c,v 22.1 96/06/20 21:43:17 hmgr EXP$, at line number 273
To continue operation Power Off and Back On? ?(This did not fix the NO Boot problem)
So I may need the A7 Controller Board too.
In relation to the AFG1 & 2 boards, in all AF-Diags run,? the "AF Gen 1&2 Tests report no failures. They start to fail when doing Preliminary Paths test, which I understand involves the Modulation Distribution board. So I am inclined to try replacing the Mod Dist and the Serial I/O to get the 8921A working, and to replace the A7 board in the 8920A to get that to boot up.
It will be only then that I will be able to start Diagnostics and find any further problems.
So Rick this begs the question, what is it going to cost for the three boards including the P&P to my address:-
Controller Board
I/O Board
Modulation Distribution Board?
?
Regards
Bill Macham
31 Macham Road Millendon? 6056
?Western Australia.
