I've made some progress on this problem. I've manage to track down a bad diode at CR1. I now get the input on EXTAL through U22 as it should. I'm still getting the pod timeout -attempting reset error though. It seems I'm not getting the E clock signal at pin 34.

I've been comparing the schematics to my unit and they don't match. Is there more than one schematic available? The one I have is the October 1982 version. I hate working blind without schematics.

Mark Hooks

----- Original Message -----

From: Mark Hooks

To: Techtoolslist

Sent: Sunday, February 13, 2005 8:04 PM

Subject: [Techtoolslist] Help needed with a 6809 Pod Problem, 9010A

I'm at an impasse trying to fix my broken 6809 pod. I've scoured the techtoolslist archive and have not found a solution. I'm getting the pod timeout -attempting reset error message when using a 6809E processor. Here's what I know: the pod works fine with a regular 6809, the dip switches are set right for the 6809E, the 6809E processor I'm using works fine in a working star wars board, the clock source at the input to U22 looks good on the scope, the U22 enable line is high,but the u22 output is stuck low. Therefore, there is no input on the processor EXTAL.

I think this is the problem. Where do I go from here, replace U22? Before I go hacking around on a rare pod, I want to make sure I'm on the right track.

Mark Hooks
A.K.A. Pinmania
850-894-8103

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