Jed, we are experiencing some fallout of Talons board sets on the final 
line. They come up with a GSP timeout error after being powered down then
powered back up again. We currently have 11 boards in this condition in the
tech area. Jim Buchanan has been working on these for 3 days now and can't
seem to isolate the problem. Would you please come over to meet with Jim 
as soon as possible to help correct this problem?
Thank You           Ken w.    3909

Jed,

	I took the board and the new self-test eproms over to Jim and he tried 
them and we found that it still has vram problems with the new self-test eproms.
He exchanged the Multisync board with another one that exhibits the problem more
often for us to look at and I connected it to a bench setup in your lab and I 
can't get it to fail even with the original self-test eproms. Your new self-test
roms are also on the bench.

Glenn

I would like to find out if there is still a VRAM problem when the
board is powered solely by +5V.

On Jim's test setup, either turn off the appropriate supplies or use a 
pin extractor to remove +15V and -22V from P1.

On a real game with the Problem, unplug the Rump Thump Board.

If you want to wait until I come in, that's fine.


Jed 

THE LATEST ON OUR END.
WE PULLED THE SAMSUNG VRAMS OUT OF A MULTISYNC WHICH WAS FAILING
SOCKETS WERE INSTALLED AND JIM LOADED MICRON TECHNOLOGY 150ns PARTS AND
THE BOARD WAS CYCLED ON AND OFF 100 TIMES AND IT WOULD NOT FAIL. THE SAM-
SUNG DEVICES WERE REINSTALLED AND THE BOARD FAILED IMMEDIATELY. IT APPEARS
THAT THE SAMSUNG ARE NOT COMPATIBLE ON SOME BOARDS. 
I SENT A MAIL MSG TO GLEN BUT LATER HEARD HE WILL NOT BE HERE TODAY. I 
HAVE 30 BOARDS IN TECH REPAIR NOW FOR THE SAME PROBLEM AND WE NEED HELP 
TO FIND A FIX. OF COURSE WE ONLY HAVE THE SAMSUNG PARTS IN STOCK AND I DO 
NOT KNOW AVAILABILITY OF OTHER MANUFACTURER PARTS. BURNIAS IS CHECKING THAT.
PRESENTLY WE WILL BE INSTALLING SOCKETS IN ALL 16 VRAM LOCATIONS SO IF THE 
DECISION IS MADE TO CHANGE ALL THE PARTS IT WILL BE MUCH EASIER. 
COULD YOU PLEASE HELP US OUT IN THIS DILEMMA?

THANKS     KEN W.   3909

Jim fixed the board with the sockets and tried the other brand VRAM and could
not get them to fail. If the Samsung VRAM are in they fail quite often. He also
noticed a glitch on the reset line immediately after power-on and is wondering
if this is ok. He gave me a power supply like the one he uses so I can connect 
it to the board in the lab and try to duplicate the problem over here. 
Also Don Wrightnour has initiated a deviation to go to sockets for the VRAM.

Glenn.

From:	MIKE::WILLIAMS     29-AUG-1991 06:54:33.72
To:	MCNAMARA
CC:	
Subj:	VRAMS

GLEN, JIM GOT THE BOARD SET WORKING THIS MORNING AND INSTALLED THE MICRON
TECHNOLOGY VRAMS. HE COULD NOT GET THE BOARD TO FAIL AFTER POWERING UP AND
DOWN APPROXIMATELY 100 TIMES. AFTER REINSTALLIING THE SAMSUNG DEVICES, THE
BOARD FAILED IMMEDIATELY. PLEASE PASS THIS INFO ALONG. WE NEED A FIX FOR 
THIS PROBLEM ASAP. I HAVE ABOUT 30 BOARDS EXHIBITING THIS FAILURE IN MY 
REPAIR AREA AND WHO KNOWS HOW MANY BOARDS ARE GOING TO FAIL OUT IN THE 
FIELD.      THANKS     KEN W.   3909

Ken, I have left the following message on Jim's chair. Please make sure
he gets it. Thanks. I am history.

	Jed						9/6/91

Jim,

   These are the mods for MultiSync Boards with Samsung VRAMs:

	1. Connect a 10K 1/8W Resistor from 120_U pin 18 to +5V.
	2. Connect a 10K 1/8W Resistor from 120_U pin 16 to +5V.
	3. Connect a 10K 1/8W Resistor from 120_U pin 14 to +5V.
	4. Connect a 10K 1/8W Resistor from 160_U pin  8 to +5V.

	5. Cut and lift 120_U pin 1
	6. Connect a wire jumper from 120_U pin 1 to 120_K pin 2.


   Let Rick know how mods 5 and 6 work out.


Thanks,


Jed

I talked to Jim this morning and the newest mod still does not solve the vram
problem. Of the 3 boards in question, 2 work now but 1 still fails. Another 
problem is that 2 of the other 29 boards now fail with this last mod.

Glenn