Nanao MS9-29A image rolling

[mRCaESaR]

Hey guys,

My ms8 had a vertical collapse the other day (will send to Jomac)



I'm replacing my ms8 with an MS9 which I had the MS9 monitor working 100% when I was doing some testing for my racing cab..



Even got it working to 24khz



Now for the love of God... I can't get a proper image on the monitor when I put a Pandora/jpac or raspberryjamma on my astro city.

It's like I need a VHOLD but I cannot find a VHOLD pot.





Anybody have suggestions?

[mRCaESaR]

Video of image rolling..

On a Pandora's box..

https://youtu.be/qjtjjv1vZH8

On a RaspberryJamma

https://youtu.be/I_3X_9cfgdE

Sent from my SM-N950F using Tapatalk

[grantspain]

i reckon that is a video ground problem, you may need to link the video ground pin 14 to ground pin 1

[mRCaESaR]

i reckon that is a video ground problem, you may need to link the video ground pin 14 to ground pin 1

I initially thought ground issue too...

I've checked continuity between all ground points and I get the good old "beep" on the multimeter.

Checked a different cab and still the same issue.

I'll continue to re-check

[grantspain]

just want to point out that some jamma looms have video ground on pin 14 and some have it on pin 1, some game boards have video ground on pin 14 and some on pin 1- if you link 14 to 1 quickly then you can prove it

its not a chassis fault 100%

[mRCaESaR]

just want to point out that some jamma looms have video ground on pin 14 and some have it on pin 1, some game boards have video ground on pin 14 and some on pin 1- if you link 14 to 1 quickly then you can prove it

its not a chassis fault 100%

Thanks. I'll test this out.

[mRCaESaR]

Whenever the pcb is connected, pin 1 and 14 have continuity - still the same issue.

I tried putting the GND directly to the PSU - still the same issue.

I don't want to strip the wires on the harness, so I might try a different PSU and another jamma harness and try and test that way.

[grantspain]

also be aware the video ground is white on the nanao and sync is blue/white- if original wiring

[mRCaESaR]

Yeah on the jamma harness sync is blue/white, but on the cable for the monitor it's grey and it's in the "H" section of the JST connector.