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  • troubleshooting arcade machines..

    ok guys, i'm very new to this so bare with me.
    pc's are more my thing, but i have a general understanding of electronics.

    Virgil suggested i post it here, the following is a message i sent to him this morning..


    "
    hey mate,
    thanks for your reply!

    basically i bought a leisure and allied cab. everything appears complete. i have a reasonable knowledge of electronics, but this is my first cab so i dont know much about it.
    i checked all the wiring as best i could,
    from what i can gather it's like this..

    240v in goes to a long rectangular panel that splits it into 4 outputs. there's a big transformer which i'm guessing steps down to 110 volt, and another which has labels for like 12 volt and others around that range.
    theres a power supply ( not a pc one) but has 12v, 5v etc. has a little knob on it. not sure what for..
    5v adjustment mayby?

    has 2x 20c oldham coin mechs, which i've managed to get one working, and a odometer thingo that's been disconnected ( 2 orange wires hangin off the connector.

    i think you guys call it a lowboy design. except it's not a lowboy. the monitor has a marqee above it and a speaker, all built into the cabinet. the speaker faces the screen basically. it's got a monitor that's rectangular and longer vertically than horizontally ( like widescreen vertically lol). from memory the monitor is mitsubishi branded on the back of the tube.

    has a single joystick 2 buttons and a 1 and 2 player button. this is all an upright design. it's missing the coin holder box but that's not too hard to fabricate i spose.

    it's got a time pilot board in it and a bigger board under that with sort of like an 40 or 60 pin ide type connector linking the two.

    as far as i can gather it's got a jamma wiring harness, and has a edge connector than converts it to konami plugged from the cab's jamma connecctor to the board.

    i've got no way to know whether any of the electronics are working, as soon as i turn the damn thing on it blows the fuse in the 240v distribution thingo ( that thing also has a main power switch which cuts the positive power only, according to my multimeter.). i've tried 3amp 240v fuse and went to 5 amp 240v but they blow straight away.

    cant really find any info on troubleshooting them, and monitor repair is likely out of my league.

    it's seen better days, and my goal was to get it to work and put space invaders in it and put it into a pub and make some $$.

    last night i realised that running mame on it with a pc etc and charging for it ( commercially) was highly illegal and could get me in serious shit...i think.

    any thoughts?

    to complicate things, i'm in brissy at the moment,
    but live in toowoomba, where the machine resides.

    paid $50 bucks for the machine and so far spent $4 on fuses. so i dont think i'm doing too bad.

    bit depressed that i cant seem to get her going.
    all the ground wires appear ok.
    there's a bit of aftermarket wiring which is really confusing near the transformers, and the other night while trying to figure out the wiring for the transformer etc i broke one of the wires off that.

    do you reckon mame it and just keep it for home?
    i really had visions of getting space invaders going on it and placing it in a pub.

    how can i do that legally?

    sorry about the huge reply lmao
    kramer.

    "

    any advice on what to do would be appreciated people
    this is i suppose the best place for it.
    Last edited by kramer; 12th August 2006, 07:02 PM.
    The HillDweller

  • #2
    Unplug the monitor and try another fuse, if it doesnt blow the fuse then your monitor chassis is stuffed, dont bother fixing it its not worth it...

    If it still blows then disconnect the PSU see if its that. if it still blows your short is elsewhere and you may want to stop before you hurt yourself!

    I do cab wiring, psu and monitor chassis if you want to revive it and not electricute yourself
    Always interested in Retro and Current gaming

    https://www.gamedude.com.au

    Comment


    • #3
      dare i ask what a monitor chassis is worth?

      i'm beginning to think mame is the only way to go here.

      picked up a 19" flatscreen CRT today at a good price, and i have all pc components ( ~p2 450, 256 ram etc, ti4200, and also 2 thrustmaster joysticks that i picked up cheap from cashies a while ago. i think that's everything i'd need for mame..
      would save buying a keyboard encoder and total build cost would be around $100.

      less if i sell the old componentry.

      it's an option....

      will try unplugging the monitor chassis... its a pain since wires go everywhere from it.

      any way to test a transformer?
      i'm dealing with ~25year old hardware here...
      The HillDweller

      Comment


      • #4
        Dude if you want it for your self mame it....
        sell the striped bits on ebay
        if you want to make $$$ outa it you wont make heaps
        you will have to spend $$$ to make $$$
        nothing is easy
        The best action is wrist action!!!!!!

        Comment


        • #5
          Wellcome to the fourm! We all try to help new people out.

          Repairing Chassis can be expencive, Espescial if the FETs need replaceing. $15 a pop for some... But if you want to run it "as close to the original" it`s not that bad.. I probibly spend all up with Fets, and a re-cap, About $50~ per Chassis.

          I don`t consider it not worth it.. as all my machines run them and i have inverstered in a far bit of specfic test gear for them. I have been into electronics for many many years! So didn`t have to buy everything....

          I replace everything and totaly re-wire each cab, It sounds like alot of work.. and it is... but once done.. it`s done. Probibly close to $300, New joysticks,buttions pre-maid harness (Beffed up and fused), new step down transformer, screws , zip ties, AT PC power supply, Chassis service ect...

          What state you from? Probibly best to see if you can find some one local to give you some "On the job" advice i`m sure one of the guys would be willing to help.

          Mrv.


          Originally posted by GameDude
          Unplug the monitor and try another fuse, if it doesnt blow the fuse then your monitor chassis is stuffed, dont bother fixing it its not worth it...

          If it still blows then disconnect the PSU see if its that. if it still blows your short is elsewhere and you may want to stop before you hurt yourself!

          I do cab wiring, psu and monitor chassis if you want to revive it and not electricute yourself
          Last edited by Mrvfone; 13th August 2006, 09:05 AM.

          Comment


          • #6
            Yeah if its a 20" do yourself a favour and buy a universal chassis from Jomac. Can be cheaper than getting the chassis repaired as Mrv already said.
            Just remember though when it comes to monitors and chassis you are playing with dangerous voltages, if your unsure about ANYTHING get somebody in that does or its

            Comment


            • #7
              i guess the issue here is that if i get another monitor chassis, what if the monitor's dead too, and the game board...

              time pilot sux anyhow !
              i want space invaders heh
              The HillDweller

              Comment


              • #8
                you guys just make things waaaayyy to hard

                first check your ac cord a visual inspection to make sure the plug is ok

                then with all the outlets disconnected from your distrubution box turn it on
                does the main fuse still blow ??
                if it does there is a problem with the distrobution box
                if it doesnt blow start plugging in your outlets
                power supply
                top fluro light ( if the ballast in the fluro is blown it may well be the cause of your drama )
                monitor ( if it uses your distrobution box most dont most are wired to the 110 volt side of your transformer although some did use 240)
                the plug that blows your fuse with be the source of your trouble

                Comment


                • #9
                  Originally posted by kramer
                  i guess the issue here is that if i get another monitor chassis, what if the monitor's dead too, and the game board...

                  time pilot sux anyhow !
                  i want space invaders heh
                  HE he I will have your time pilot if you dont want it

                  Anyway the chassis may be blowing because the yoke is shorted, thats the copper coil around the tube.
                  Out of all the potential problems the chassis/yoke is the most likely cause of your problem.
                  It is easier to replace the tube/chassis in one go but be carefull the anode on the tube is dangerous to handle, the tube can store dangerouse amounts of electricity if not discharged correctly.
                  The chances that the stepdown transformer or lights are causing a problem will be pretty remote but you should inspect the wiring for loose connections, frayed cables ect before doing had work.
                  I do carry spare tubes and chassis if you want and I can do a free quick inspection if you bring the whole cab to work here.
                  Always interested in Retro and Current gaming

                  https://www.gamedude.com.au

                  Comment


                  • #10
                    ok update, i traced one of the 3 pin plugs...which has some aftermarket wiring...

                    from distribution box ( pos neg earth) to plug ( pos is running straight back to the distribution box chassis earth ) what the f@#k was this guy thinking..?

                    that's positive straight back to distribution box.. surely that'll blow a fuse faster than oprah on a baked ham ?

                    i'm aware of those nasty anode's. i'll be very careful i promise lol. can't discharge it though, i've got no gear to do it.

                    in reguards to the monitor, looking at the yolk, one of the copper wires is sorta hanging off.. that's bad i think...

                    suggestions?

                    can't solder that wire back onto the step down transformer tonight as i can't find my damn solder.. got iron but no solder

                    will check distribution box though without the connectors plugged in. i ran a multimeter over it and every plug seems A1. will see if it blows the fuse though.
                    kramer.
                    The HillDweller

                    Comment


                    • #11
                      If this machine is at Goodna I will come around and have a look with you

                      Comment


                      • #12
                        thanks for the offer virgil, your a champion, but the machine's in toowoomba, where i reside

                        wont fit in the back of my nissan pulsar either !

                        just trying to figure out where the other 2 wires go..

                        question...noobish i know, but since i can't turn it on i can only guess what this thingo does.

                        it's a variable resistor with about a 3" long shaft, and has a momentary button... both are located on the same little panel, on the inside side of the rig

                        is it volume control and a service button?

                        what's the service button for, assuming it is one..?
                        The HillDweller

                        Comment


                        • #13
                          Service buttons used for for racking up credits..

                          See, I'm an expert - I can tell you what the service button is for..

                          Comment


                          • #14
                            what the... i dont need a service button lol, i've got access to the coin mech... click click click hehe
                            The HillDweller

                            Comment


                            • #15
                              well gd if you havnt seen lights and other things being the cause of some problems you mustnt of been doing this very long ive seen the on off switch being the cause of the problem ive seen fluro ballasts being the cause and a million other things have you ever heard of starting with the simple things first ?? before making it harder than it needs to be ?? maybe a chassis problem im not there but the same still applies transformers do go so do power supplies and chassis but doing the whole distrobution box thing is an easy way of checking rather than looking for and assuming the worst

                              Comment

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