[Techtoolslist] Troubleshooting a defective pod

[Andre Huijts]

One more thing:

The manual says to do a ROM test and it gives the addresses in the table but it fails to give the correct signature ?

Anyone knows it for the Z80 pod ROM V1.1 ?





Op 2 feb. 2013, om 15:53 heeft Andre Huijts <a.huijts at upcmail.nl> het volgende geschreven:


> OK, I recently traded a working 8088 pod (still have two others) for a working Z80 pod.

> I also (temporarily) have a 9010A added to my Fluke stuff.

> 

> Now I figured (like the Z80 pod manual suggests) to troubleshoot my defective Z80 pod with the 2nd working one.

> 

> The working one self-tests fine on both my 9100A and the 9010A. The defective shows problems on both the 9100A (not recognized please reset) and 9010A.

> 

> 

> Now....I am confused about the powering up of this set-up. 

> 

> The normal set-up seems to say to do the following when using a "normal" UUT (no pod):

> 

> 1) power off troubleshooter and UUT

> 2) connect pod to troubleshooter

> 3) power on troubleshooter, do self test

> 4) plug in ribbon cable to UUT 

> 

> So...basically you have to connect the ribbon cable to the UUT while the troubleshooter and POD are powered up ? Feels kind of strange to plug it into the UUT's processor socket while it carries power ?

> 

> 

> Anyway, next I start reading page 5-12 in the Z80 pod manual and here I get confused:

> 

> Under "Prepare to troubleshoot the inoperative pod as follows" it says:

> 

> 3) Connect the pod under test to +5V etc. etc......so here they seem to say to DO power up the "UUT (= the defective pod)" BEFORE turning on the power of the troubleshooter.

> 

> Step 4) says: Connect a troubleshooter (the 2nd one in my case, the one that will do the troubleshooting) to a 2nd (working) pod, apply power to that troubleshooter and then connect the ribbon cable to the sockpet of the defective pod....

> 

> So basically, this is the other way around of the normal set-up.....which I find strange.

> 

> They further cloud things by the next text in BOLD:

> 

> "Do not apply or remove any power with ribbon cable connected between second pod and inoperative pod."

> 

> So this means I should have to first remove the ribbon connector from the socket of the bad pod before turning any troubleshooter off....right ? 

> 

> I fear I already did some switching on/off, basically as if it were to be a regular UUT. The good Z80 pod still self-tests OK so I hope I didn't damage anything.

> 

> Can someone please tell me what is the right way to do this ? 

> 

> I did see Power failure messages at some point.....

> 

> 

> André Huijts

> andre.huijts at upcmail.nl

> 

> 

> 

> 

> 

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André Huijts
andre.huijts at upcmail.nl