Hello guys, I have a problem with my sega blast city cab (monitor), when i plug Battle Bakraid unlimited on it. it DISPLAYS and runs the game perfectly. BUT but when I plug marvel super heroes vs street fighter (CPS2) board, it "turns" on (fan and lights) but no display or sound. (this board runs perfectly when plugged on another cabinet -astro city) .. and also when i plug a namco 256 board (gundam) it also wont display, but fans and lights on the motherboard and marquee do turn on. .. and also when i plug a pandoras box 300 in 1 jamma multigame, i see a screen display but is heavily skewered and flicker a lot. my question is why wont it run? 1. could the PSU be underpowered? 2. is battle bakraid running at a different refresh rate? 3. is there a switch on the monitor that changes frequency or something? ... ill try to plug the bakraid on another cabinet. thank you for any help
not really know much about arcade but sounds like you have to check the voltage. When i remember back with my astro it was voltage ajustment using cps2. did you check it?
If you could get the make and model of the monitor in the cabinet we could see if it is a resolution/refresh rate problem. When it comes to arcades there are 3 main Resolutions Standard (15kHz) Medium (24kHz) and High (31 kHz) From looking it up, Battle Bakraid unlimited is a Standard resolution game, it is entirely possible that you monitor is only standard resolution. An easy experiment to try to prove or disprove this is to (before turning it on) turn off Dip switch 3 on The Namco System 256 (bottom right corner of the system). That turns the 256 from High resolution mode to Standard Resolution mode. If the 256 then displays fine, it proves your cabinet's monitor can only display Standard. Of course if that still doesn't work then your cabinet's power supply might not be enough for a 256 as that is quite a power hungry system. Give it a try.
Blast City is, by default, medium resolution.... but with tri-sync monitors. It requires the JAMMA board to run JAMMA games. The later ones came with them. Some were converted to JVS instead. Your PSU should be man enough for the job, if it's the original. You do need to measure the VOLTAGES that the board is getting, though. It shouldn't be insufficient power (measured in Watts - voltage is different), but there could be a PSU fault. Again, refresh rate is the wrong word - you mean horizontal scan frequency (or easier, resolution). It's not a PC monitor - the refresh rate shouldn't change. The vertical scan frequency (refresh rate, if you like) will be fixed at 60Hz in standard or medium resolution. Always check what voltages the board is getting first - particularly on the +5V line, as you should be able to adjust that. However, it shouldn't give you a sync issue. Sounds like a compatibility issue between the monitor and boards - or a stray setting.
Im back, I did check the voltages of the original PSU, theyre off by about 0.5 volts .. replaced with a "chinese" type adjustable power supply and finally my game works.. hopefully I can find someone locally to repair my Original PSU. Thanks for the advice gamemaster14XIV and retro- (the chinese PSU i got did have an adjustable thing for the voltages, and after some tweaks my namco 256 board finally turned on and loaded the game, and switching to my other boards, they all finally load) . thank you all
Don't bother - it'll cost more than it's worth to repair. If you consider what you'd charge for a good hour of your time, before parts, doing a skilled job (minimum wage here is $10 an hour - and I'd think a skilled job is worth more than that).... then think about what you paid for the Chinese PSU... which was hopefully around $20. If you're confident in repairing PSUs, then it's one to put in your repair pile, perhaps.
yep the chinese psu was about $24 include shipping. .. and yes, the "estimate" cost of the repair was way beyond my budget (i asked around a few electronic repair shops here). as it was an "unusual" item for them. Ill be getting chinese PSUs the next time my powersupplies die.
Yup, they used to be fairly expensive... but you can't compete with the Chinese ones and, as long as they're supplying them, you might as well replace. Sad reality - shame to succumb to the chuck it out ethos, but it makes more sense economically.
