RE: VECTOR: TECH: Omega Race, Kruz-Kash, and the Fluke 9010A

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I have a couple of them (one up on ebay), made by Bug Trap is my unit of
choice, I also have an older HP but not so handy to use...

John :-#)#

At 04:32 PM 9/17/00, David Shoemaker wrote:
>John, you mention a logic comparator, what model do you use?
>
>David
>
>-----Original Message-----
>From: owner-vectorlist@synthcom.com
>[mailto:owner-vectorlist@synthcom.com]On Behalf Of John Robertson
>Sent: Friday, August 18, 2000 9:50 AM
>To: vectorlist@synthcom.com; techtoolslist@flippers.com
>Subject: VECTOR: TECH: Omega Race, Kruz-Kash, and the Fluke 9010A
>
>
>I just thought I'd bore you folks with some experiences I had fixing up an
>Omega Race PCB...
>
>Pulled from stock, one very nice looking OR boardset-no corrosion at all
>battery was removed years ago, looked like an easy sale so pulled out the
>old KK test fixture and wired up my Hoie XY monitor. Dead. Disabled
>Watchdog, and pulled out Fluke and plugged into Z80 socket, hmmm, can't
>read any memory at all, yet Data Bus test is OK. Pulled 5101 and plugged
>into the 5101 test fixture (a Stern pinball MPU with zip sockets)-dead,
>ties data bus up. New 5101, still no reliable memory read, pulled out logic
>comparator, and found bad 7432 (-memw), now could read RAM. Lots of ram
>failures (turned out to be 5 bad 2114s), now couldn't read 2732s reliably,
>dig more with comparator, bad 74ls08, now can read some Eproms. Pulled 0h
>ROM, now could read all eproms. Hmm, check 0h Rom on programmer...Ok? Burn
>a new one, now all Rom checks out (anyone like Fluke sigs for Erpoms?).
>Repair Watchdog. Hook back up to XY, good picture, but Y pot does nothing,
>turns out the 10K resistor is open. Now it works....total time about five
>hours....sigh...never should start these old buggers some days.
>
>John :-#)#
>
> John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
> Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games)
> http://www.flippers.com
> "Old pinballers never die, they just flip out."
>
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  John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
  Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games)
  http://www.flippers.com
         "Old pinballers never die, they just flip out."

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Received on Sun Sep 17 16:58:42 2000