I am working on a Battlezone that has a perfect picture in Test Mode (no errors reported) but won't run or produce a picture or run out of test mode. No response to Coin switches, Start button is lit solid.
Originally, it was dead. First fix was getting proper power to both boards (reflow edge connector pins etc.). Now have 5.01 at main logic and 5.00 at Aux PCB. No measurable AC ripple. That got it to the 10th beep indicating bad 2114 RAM.
Replaced 2114 which got it up to producing a picture in test reporting a math box error (L). Cleaned and reflowed interconnect headers (a number of cold solders at the end pins).
No more math box error.
137004-001 - all 4 tested good but also swapped with working ones from a working Tempest Logic. Swapped Pokey even though all buttons and joystick switches respond in test. Still no change.
The other odd thing is the 137004-001s are all extremely hot to touch in the center. They don't seem to run that hot in Tempest. Again, still only 5.00vdc to them on Aux PCB. And this is for both the originals and the ones out of Tempest currently on the BZ board. BZ ones are still working fine in Tempest.
I am currently digging to get a Win98 machine going so I can use my old Advin Pilot-U40 to test all the Bipolar proms since I don't have another BZ board to swap with.
Anyone ever see this before? Got any ideas?
Originally, it was dead. First fix was getting proper power to both boards (reflow edge connector pins etc.). Now have 5.01 at main logic and 5.00 at Aux PCB. No measurable AC ripple. That got it to the 10th beep indicating bad 2114 RAM.
Replaced 2114 which got it up to producing a picture in test reporting a math box error (L). Cleaned and reflowed interconnect headers (a number of cold solders at the end pins).
No more math box error.
137004-001 - all 4 tested good but also swapped with working ones from a working Tempest Logic. Swapped Pokey even though all buttons and joystick switches respond in test. Still no change.
The other odd thing is the 137004-001s are all extremely hot to touch in the center. They don't seem to run that hot in Tempest. Again, still only 5.00vdc to them on Aux PCB. And this is for both the originals and the ones out of Tempest currently on the BZ board. BZ ones are still working fine in Tempest.
I am currently digging to get a Win98 machine going so I can use my old Advin Pilot-U40 to test all the Bipolar proms since I don't have another BZ board to swap with.
Anyone ever see this before? Got any ideas?
