RE: Fluke 9010a just died

<x-flowed>
Hi Matt,

Do you have a second Fluke? (we have four at this time) you could mix and
match.

With respect to the I/O tests, they are only valid if there is a PIA of
some sort as the I/O interface, a TTL latch/buffer won't show up the same.
I have one 9010 with a display problem that shows up when it warms up, but
if yours is dead from the start, then I suspect cold spray won't help you...

Have you tried reading the ROM checksum with the Series 90 and comparing it
with an archived set? I can email you a set for comparison, I have found
that ROM can knock out a system if it does not release when unselected.

John :-#)#

At 05:55 PM 10/04/01, you wrote:
>Would anyone care to take a guess on this one? Even if your guess might be
>wrong, maybe it'll spark some ideas.
>
>Matt
>
>-----Original Message-----
>From: Matt Rossiter - Verio Southern California
>[mailto:matt@veriosc.com]
>Sent: Saturday, September 29, 2001 10:25 AM
>To: TechToolsList@flippers.com
>Subject: Fluke 9010a just died
>
>
>I don't know if you guys have this same experience, but I haven't touched
>my 9010a for months. I went to fix my Midway Double Play last night and
>for some reason now this tester won't work. Just for no reason at
>all. AUUUGH!
>
>Fortunately, I happen to have my Fluke 90 series Z80 tester. I'm hoping
>someone on this list has had to become familiar with the 9010a service
>manual. If you feel like giving me a hand, you might want to refer to
>page 4-32 - 4-35.
>
>Here's the testing I've done so far.
>
>Symptoms - 9010a powers up but only displays a zero with an 'x' in the
>middle. The keyboard doesn't work except when toggling the probe pulses
>high or low.
>
>9010a self test - won't respond to key presses.
>
>90 series uP tests:
>Bus Test - Pass
>Ramp Test - Pass
>Memory Test - C000-FFFF Pass
>Memory Soak - C000-FFFF Fails - Hmmmmm. Is this normal?
>
>I/O verify - writes data to certain I/O addresses and then reads the
>data to check to see if it comes back the same.
>
>The Pod/Probe PIA section passes the I/O verify test (100C0 - 100C3)
>The Display/Keyboard section Fails the I/O verify test (10080-10081).
>The Magnetic Tape controller also fails (100A0 - 100A1).
>
>What appears to be happening is whatever gets written to the
>display/keyboard assembly will not get read back correctly.
>
>Here's something weird. If I do a write @ 10081 Data=00 (reset command to
>the display/keyboard) and loop it for a while, then immediately reset the
>"mainframe" (as they like to call it). For about a second the Normal
>display comes up and then blanks out.
>
>I can also send commands to the magnetic tape controller and it will
>rewind. So it seems like the 'writes' are all working, the reads are
>screwy.
>
>I'm mainly concerned about the keyboard/display assembly. Does anyone
>have any advice on this one? Could I have a bad ram chip somewhere? I
>already tried replacing the Z80 microprocessor.
>
>Thanks...
>
>
>Matt
>
>
>
>
>
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</x-flowed>
Received on Thu Oct 04 21:25:30 2001