Zaccaria/Seevend Fitter Maintenance 2022

02/06/2022 - Northwest Pinball and Arcade Show (2022)

The game PCB stopped booting during show setup and the spare PCB was swapped in. On show day 2 the game wouldn't coin up that was fixed by replacing the credit PCB but a short time later there was no display with the game was playing blind. There wasn't a spare Hantarex 900 to swap in and the game was withdrawn.

02/07/2022 - Fitter game PCB #PA20191217 repair

On the bench the game PCB wasn't booting. Testing with the Arduino ICT passed ROM OK but the RAM test failed with "E:C22 8000 90 80" with all the other RAMs testing OK. I suspected IC 22 (2114) was bad and replacing it brought the game to life, but the sound was intermittent and getting stuck playing music.

Moving the Arduino ICT over to the sound CPU, the ROM tets passed OK but the RAM test failed "E:19 3800 90 00". The other RAM nibble tested OK, and I suspected IC 19 (2114) was bad and replacing it fixed the sound. The PCB ran on the bench for several hours with no further issues.

21/07/2022 - Fitter credit PCB repair

Testing the credit PCB on the bench confirmed that one of the coin inputs didn't result in a credit pulse and the credit bypass hack was applied.

11/11/2022 - Monitor chassis repair

On the bench the chassis HV was present but there was no picture. A scope found the RGB inputs and sync all looked OK. Checking the RGB gun drive at connector 'CF' found ~150VDC idle high that didn't match the manual waveforms '21','22','23'. Manual waveform '1' was correct as were '1','2','3' and '7'. Checking the +12VDC found +12.15VDC and +200VDC at 188.4VDC. Checking the blanking output from IC1 (TDA3501) found it inactive and replacing IC1 fixed the picture.

After installing the chassis back into the cabinet, the game ran for several hours with no further issues.