Mortal Kombat 2 Arcade PCB Sound Board Repair - Shorted To Ground Accidentally

[@ronwade2206]

My vintage of video games! I was the only tech at Arizona Cigarette and Amusement in 1980-81.

[@GodKitty677]

The ribbon cable is connected the other way around in the last fix.

[@dime666bag]

Smeggin awesome Mike !

[@slipdermanmastercop4875]

GREAT.....a message from ERIC (TO FRANCE).

[@leso204]

In the days when you could visibly see the componants to work on ....

[@slipdermanmastercop4875]

@YourMKArcadeSource : Hi on the 9 pins of the sound card power supply. the negative 5 volts (-5 v pin 6) connected to ground has a value of 3.35 Mega ohms. On the other hand, between the +5 volt pin (+5 v pin 8) and ground I obtain a value of 600 ohms. what do you think would be the problem?

[@persona83]

Outstanding!

[@lpd159]

I’m very new to the world of owning your own arcade and was lucky to come across a MK2 cabinet that I’ve gotten back up and running. The monitor has an issue of vertical scrolling that won’t stop with the potentiometers on the back so I think I need to assess the CRT board further. Regardless, here’s a very amateur question, where can I find the pin connectors that fit the CPU/sound boards PCBs? I’ve searched twisted quarter and other retro arcade supply sites but still haven’t come across a site yet that sells them. I had to solder the individual wires on the board which was not the best technique but for now is working. Thanks!

[@YourMKArcadeSource]

Are you referring to the Jamma connector pins? www.arcadepartsandrepair.com/store/pinball-kits-parts/pinball-parts/bifurcated-edge-connector-split-pins-18-24-awg-10-pack-me1004/

[@lpd159]

No, not the Jamma, it would be the 8 pin connector that goes from P3 on the CPU to P1 on the soundboard. I also have a Sega Turbo that has these connector harnesses (albeit much older). I’m just having trouble finding a site that sells 5,6,7,8, etc pin connector harnesses.

[@YourMKArcadeSource]

Ah. Arcadepartsandrepair.com will have what you need.

[@lpd159]

Got it, thanks brother! Like I said, I’m new to the world of arcade ownership so very amateur question.

[@gugudias19]

You are the MK mage 😅

[@KoncadeGaming]

Hey bro I have a t-unit which briefly shows the version on-top when in test mode or graphics in game mode and immediately resets, goes into a reset loop. No bridged pins underneath, have you seen this at all with a t unit?

[@YourMKArcadeSource]

Reseat the two PLCC chips. (The two chips in the brown sockets). You’ll need one of these… www.amazon.com/a06111000ux0025-Professional-Extractor-WTS-610-Assisted/dp/B007Q8J2HG/ref=mp_s_a_1_3?crid=3B6BX5UTSUKVX&dib=eyJ2IjoiMSJ9.expfddhxoGm-jm3h_fYx9GtqswC2r7z05h7969xvpHjL-3pZpscZXzB6tCPmbIg5B3xOx97AXkLsSkXt1g3hg_amruPzdKS9iVB99Tno4EObE-5DlthkjD9J9O1i-Pw9bRSwyx1JLCWcLpVgXAWU4ELkGIZZKQq--M9W_MuQYpeNfz869-JeGnaOdFHH1sXJf4ZkQb9lP5hC1qa-HgDhjg.Blz08GXEk5yMpCIELIfowTMv-k6u_IWxb-cxv8BVtb0&dib_tag=se&keywords=plcc+extractor&qid=1723470598&sprefix=plcc+%2Caps%2C99&sr=8-3