Solution for pcbs not syncing with LCD?

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    • Solution for pcbs not syncing with LCD?

      Hey :)

      Recently got a nice little 4:3 LCD for my test bench to stop punishing my CRT with powercycling during all repairs..
      But some (quite many) of the pcbs I have have some sync problems when connected to this lcd :/.. every second the image rolls vertically and the screen looses signal, and then I get a nice picture again, for 1 sec, and it repeats :(

      what do I need to make this stop? preferably something cheap since this is only for testing repaired games / during trouble shooting.

      Thanks in advance!
    • Arcade PCBs output a wide range of sync timings.
      Most LCDs only want 60.0hz with some minor tolerance (say 59.0hz-60.1hz).

      A device like a DVDO can buffer something like 54.88hz out to an even 60.0hz.


      However this comes at the cost of at minimum 2 frames (16ms) of lag.
      They also are hard to find today and not cheap when you do.

      I would recommend a freesync/gaming LCD like a BenQ that supports all sorts of different/wacky timings.
      Naturally an OSSC is also required to line double 240p into 1080p.

      None of this shit is cheap bro ;)
      Darksoft/Apocalypse: CPS2, CPS3, F3, MVS, S16
      RGB: RECO v2
      invzim: Jammafier v1.6b
      XianXi: JNX Raiden, SC Taito Classic, SC Sega System 16/24, Namco System 11/12 KHA
      Frank_fjs: JAMMA Extender (Special HAS Edition)

      The post was edited 6 times, last by jassin000 ().

    • jassin000 wrote:

      Arcade PCBs output a wide range of sync timings.
      Most LCDs only want 60.0hz with some minor tolerance (say 59.0hz-60.1hz).

      A device like a DVDO can buffer something like 54hz out to an even 60.0hz.
      However this comes at the cost of at minimum 2 frames (16ms) of lag.
      They also are hard to find today and not cheap when you do.

      I would recommend a freesync/gaming LCD like a BenQ that supports all sorts of different/wacky timings.
      Naturally an OSSC is also required to line double 240p into 1080p.

      None of this shit is cheap bro ;)
      hmm I dont mind the lag since its just for my workbench, but for the same reason Id like it cheap ;)
      I was hoping there was some cheap china pcb availible or something.. :D