Namco NA1/NA2 Repair Tips

[twistedsymphony]

it's a generic edge connector. as long as you get the right pin count and pitch it will be identical to whatever Namco included in their kits back in the day.

I did also design a 3D printable replica of the key used on the original connectors: https://www.thingiverse.com/thing:2391981 it's also got a picture of the part number of the connector.

 

[Nightshademan]

I see maybe i will find that kind of edge connection out there.

The key you made like that seems even better than the normal teeth type. Glad to say so far I've never connected it incorrectly to this date "Jamma that is" and was thinking if you add diodes to the power connectors of the Jamma wires maybe it won't ever fry the pcb in case someone connects it wrong? or will this just cause an anomaly?

 

[twistedsymphony]

was thinking if you add diodes to the power connectors of the Jamma wires maybe it won't ever fry the pcb in case someone connects it wrong? or will this just cause an anomaly

why complicate with electronics what can be resolved with a hunk of plastic?

all of my JAMMA connectors have keys because if they don't: I break off a piece of plastic from some broken or failed 3D print and shove it in the key pin... problem solved.

 

[Nightshademan]

I hear you.
Next time i need a key I'll break off a piece from a plastic fork from an after party.

 

[Nightshademan]

View: https://www.youtube.com/shorts/m0ryajmdQ3k

I got the amp installed it works flawlessly, No more PC speakers!

If you touch the C40 cap while it's on, you can hear a radio station, sounds to be Japanese.
Let me know what radio stations you guys hear on your end.

 

[nnap]

Don‘t know if this has been posted before but none of the caps on the audio side of the board are required for it to boot. Only the 2.2uF in the reset circuit and probably the lone 100uF in the other corner are required.

 

[fuzzbuddy]

My friend did a full recap and board clean up of Namco Classics Collection 2 - there are still wavy/interference looking lines on the screen - any suggestions folks?

 

[rtw]

The wavy interference is typically a video driver issue. Did he change all the caps in the video section ?

https://www.arcade-projects.com/threads/ms9-yoke-flip-kits.30167/post-433821

 

[fuzzbuddy]

The wavy interference is typically a video driver issue. Did he change all the caps in the video section ?

https://www.arcade-projects.com/threads/ms9-yoke-flip-kits.30167/post-433821

All caps changed, but that blue bodge cap on that chip wasn't on the PCB. It's on my classics 1 collection, but not on the classics 2 collection pcb.

 

[rtw]

Hmm, can you snip a picture of the PCB ? Which caps were used i.e. value ?

 

[fuzzbuddy]

The wavy interference is typically a video driver issue. Did he change all the caps in the video section ?

https://www.arcade-projects.com/threads/ms9-yoke-flip-kits.30167/post-433821

It turned out to be ground on the cab. If ground is connected to field ground, then there is interference (usually has the oposite effect) If you disconnect the 2 from each other, it is gone.