[Techtoolslist] 9010 Z-80 Pod Help needed

[John Robertson]

Kevin Moore wrote:

> Not saying this is it, but I've had 2 instances where I would get a 00

> on selftest, and it turned out to be a bad connection on the zif

> socket.

>

> Kevin

>

>

> On Sat, Mar 9, 2013 at 9:09 PM, Justin Johnson <rugd2go at comcast.net> wrote:

>   

>> Hi Guys,

>>

>> I'm hoping I can find some help fixing my Z-80 Pod.  Here is the scoop and I

>> will try to make this short.  I purchased a Z-80 pod with the cables cut

>> off.  Found a new set of cables and tried a self test.  The self test gave

>> me the failure code 00.  I then used a 40 pin socket and removed pin 29 as

>> suggested in the manual and placed the socket on the pod pins and reinserted

>> the 40 pin connector into the pod for a bus test.  I then got a CTL ERR

>> 00000000 00001000-LooP.  As I understand it that shows an issue with driving

>> bit 5.  Am I correct that this is address and data line 5? I used my logic

>> probe and probed the data lines of U4 or R6532AP.  I found that pin 28 of U4

>> which is the R6532AP has Data line 5  low while the other data lines are

>> high.  Where do I go from here?  Any help or suggestions would be

>> appreciated.

>>

>> Thanks

>>

>> Justin

Could also be a problem with the 40 pin cable, try the one from the 6502 
pod before going too deep into repairing this pod.

John :-#)#