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Main => Monitor/Video Forum => Topic started by: clonestar on April 16, 2006, 06:34:30 pm

Title: Changing the monitor in a jamma cab ANSWERED THANKS
Post by: clonestar on April 16, 2006, 06:34:30 pm

The monitor in my jamma cab (kortek probably ftn20) is dead and I have another unidentified Wells Gardner in a quiz machine that I want to swap over.  The kortek is connected to an isolating transformer and the wells gardner is connected via a Euro socket to the large psu in the bottom of the quiz machine.

I have no trouble wiring up the signal side but want to know the following.

1. Can I connect the WG monitor direct to the mains (240 UK)  It is on a 240v supply at the moment but coming out of the psu.

2.   When I have swopped everything over  do I still need the arcade psu in the jamma cab if I am connecting to a pc via a j-pac or does the j-pac get the power it needs from the ps/2 connection.  I dont really want to keep the jamma psu in the cab if I don't need it.

One last thing - I do have qualifications in TV & Radio repair - it's just that they are 28 years old - so please spare me the electricity is dangerous lecture but I would really appreciate some help and advice from someone more experienced with jamma cabs.

Title: Re: Changing the monitor in a jamma cab
Post by: grantspain on April 17, 2006, 02:25:30 am

the kortek may have 2 voltage inputs depending on how many wire there are on your mains input,if you have 4 wires then 2 are gonna be 240v for degauss and the other 2 120v for the chassis-the wells should be 120v unless its a free range chassis,anyway first job indentify both monitor voltages with a meter,if they are the same swap them,if you need more help then post back after you have checked the voltages

Title: Re: Changing the monitor in a jamma cab
Post by: clonestar on April 17, 2006, 05:27:59 am

The kortek definitely has four wires and reading off the transformer lugs they are indeed 240 and 120.  The WG is 240V it is connected through a clearly labelled interlock switch that detects the back open.  However what I want to know is if I can connect the WG direct to the mains and loose the transformer that the kortek is connected to?

Title: Re: Changing the monitor in a jamma cab
Post by: clonestar on April 17, 2006, 06:49:23 am

OK Solved that one.  Fired up the WG connected to the mains direct and it worked fine in the quiz machine, so I guess I can loose the monitor transformer in the jamma cab.  Next question?  If I am using a j-pac do I still need the arcade psu in the jamma cab, or can I go without or take power from the pc.  Not really a monitor question so I will ask again if elsewhere if I get no reply here.

Thanks

Title: Re: Changing the monitor in a jamma cab
Post by: clonestar on April 17, 2006, 07:00:05 am

OK so I did what I should have in the first place and searched on removing the psu and of course it is fine to do this - even preferable.   Thanks for the help I was worried about the disconnecting the 120v wires that you identified as deguass so now I am good to go.

Next time I'll read first,

Dave

Title: Re: Changing the monitor in a jamma cab ANSWERED THANKS
Post by: grantspain on April 17, 2006, 03:33:03 pm

no the 240v is for degauss,the 120v is standard american/japanese mains voltage