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Arcade Collecting => Miscellaneous Arcade Talk => Topic started by: SUPER_SSII_TURBO on August 20, 2007, 02:43:42 am

Title: Power Supply??
Post by: SUPER_SSII_TURBO on August 20, 2007, 02:43:42 am: Just wondering what amount of power people are using in their cabinets. I have a super street fighter II cab, that i just put MK4 in and i think the MK4 board is drawing more juice than is available from the 150w power supply...so i ordered a 200 watt...is these anyway to cobmbine the power of the 2 supplies??
Title: Re: Power Supply??
Post by: CheffoJeffo on August 20, 2007, 11:40:52 am: What are the symptoms that you are seeing that make you think that the board is drawing more than 150W ?

EDIT: Are you referring to this posting:

http://forum.arcadecontrols.com/index.php?topic=70215.msg718622#msg718622

First thing you should do is clear the edge connector and then check the voltages coming off the PS.
Title: Re: Power Supply??
Post by: SUPER_SSII_TURBO on August 20, 2007, 04:04:08 pm: Yes...the MK4 board is making my screen have waves in it...and it lightly flickers...someone told me it waould most likely be the power supply???
thanks
Title: Re: Power Supply??
Post by: CheffoJeffo on August 22, 2007, 08:07:09 am: I'll reply here as we have futzed up your other thread (apologies for my part in that).

FWIW, I don't expect a normal arcade PCB to require more than 150W, but I do not have, nor have I seen, an MK4 PCB. Maybe one of the operator-type folks can chime in and let us know if I am off-base here.

After you clean the edge connectors (I use contact cleaner or alcohol first and, if still dirty, a pencil eraser), if you still have problems, I, like BobA, would suspect voltage problems (which is different from not having a big enough power supply). As BobA points out, some boards like just a little more voltage (not wattage) ... my Galaga likes to run at 5.15V (instead of 5V).

Many arcade switching supplies have a little knob (potentiometer) with which you can tweak the voltage level. Some even have an LED that provides a rough indication of the output voltage. And then some have neither.

HOWEVER, it is always best to use a multimeter and measure the voltages coming off of the power supply and the voltages reaching the board. I STRONGLY suggest that you do this before adjusting any power supply (if you don't have a multimeter, perhaps you can borrow one). There is a sticky post on How to use a multimeter to troubleshoot (http://forum.arcadecontrols.com/index.php?topic=68787.0) that may be useful.

This may seem like a pain, but, if you are going to work with CoinOp machines, it is 100% necessary equipment (and once you have measured voltages a few times, it is just second nature).

If you can provide a picture of your power supply, one of us may recognize it and be able to advise you on adjustment.
Title: Re: Power Supply??
Post by: BobA on August 22, 2007, 03:06:30 pm: Hi Guys. Nice to see the thread back again so maybe we can help SST. Do not do anything until you have measured the voltages with the MK4 board in place. What type of supply do you have in the cab? Is it an arcade supply or a PC supply?
Title: Re: Power Supply??
Post by: grantspain on August 22, 2007, 03:55:17 pm: namco games like motocross and time crisis 2 take a 250watt whilst i use 350watt on time crisis3,your particular problem is strange to say the least and it sounds like a ground issue.
is the interference affected by anything or is it static
Title: Re: Power Supply??
Post by: genesim on August 23, 2007, 12:36:56 am: Oops wrong thread my bad. I thought this was the speaker thread. So many problems with one game. I hope you get it figured out.