Track and field fajitsu hell

[Shinydaz]

I got this board in recently, after replacing 22, yes 22 bad fajitsu's and 4 eprom sockets (for now) it finally fired up and it's running. Still a few more issues but we are getting there. Best restock on my sockets

 

[bonehead]

Wow that’s dedication!!!!!

 

[virtvic]

You REALLY wanted that Track n Field.

 

[Hurray Banana]

Fujitsu ftw

We had a massive batch of fujitsu hard drives that failed a college years ago about 30 machines

 

[Shinydaz]

3 more fajitsu's replaced and 2128 ram @ h11 was bad. Looks good to me, just needs the battery replaced.

 

[Hurray Banana]

Great job

 

[smarty]

Nice fix! So did you fault find with probe/scope to find the Fujitsu's being bad and then decide to shotgun or were you finding faults on each chip that was replaced?

What were the date codes on the Fujitsu's?

 

[stevebm1]

great job,but it looks like your world record text is still corrupted,perhaps another faulty fajitsu

 

[Gary07745]

Darren your becoming quite the master at repairing the track & fields and hyper sports boards
Nice work

 

[AnDyC]

Fujitsu ftw

We had a massive batch of fujitsu hard drives that failed a college years ago about 30 machines

Ahh the great Fujitsu 20/40gb disaster I remember it well.

 

[Shinydaz]

Nice fix! So did you fault find with probe/scope to find the Fujitsu's being bad and then decide to shotgun or were you finding faults on each chip that was replaced?

What were the date codes on the Fujitsu's? 

Probed some chips around/linking the customs first after replacing the custom sockets as they didn't look good. After just the fajitsu's where failing around/linking the customs, I then just got to a point where I was just probing every fajitsu, piggybacking didn't show any improvements on screen, obviously because there where so many other failures, but it did get the gates moving. Tested everyone out of circuit and they all tested bad.

The test rom diagnosed the bad ram. As I've learnt in the past, it's not always bad ram when the test rom tells you, but as I replaced the chips dealing with the ram, this time I was sure it was down to the ram. Thankyou shoestring for the testrom.

Chip date
Year :1983
Week :17Shinydaz2018-06-30 13:34:10