Nanao MS9-29A image rolling

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mRCaESaR
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Nanao MS9-29A image rolling

Post by mRCaESaR » April 15th, 2019, 6:54 am

Hey guys,

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

Image

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..

Image

Even got it working to 24khz

Image

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.

Image

Image

Anybody have suggestions?
Last edited by mRCaESaR on April 15th, 2019, 7:34 am, edited 1 time in total.

mRCaESaR
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Re: Nanoa MS9-29A image rolling

Post by mRCaESaR » April 15th, 2019, 7:02 am

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

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grantspain
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Re: Nanao MS9-29A image rolling

Post by grantspain » April 15th, 2019, 8:34 am

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

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Re: Nanao MS9-29A image rolling

Post by mRCaESaR » April 15th, 2019, 9:00 am

grantspain wrote:
April 15th, 2019, 8:34 am
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

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grantspain
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Re: Nanao MS9-29A image rolling

Post by grantspain » April 15th, 2019, 10:55 am

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%

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Re: Nanao MS9-29A image rolling

Post by mRCaESaR » April 16th, 2019, 1:52 pm

grantspain wrote:
April 15th, 2019, 10:55 am
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.

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Re: Nanao MS9-29A image rolling

Post by mRCaESaR » April 18th, 2019, 2:27 pm

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.

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grantspain
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Re: Nanao MS9-29A image rolling

Post by grantspain » April 18th, 2019, 2:31 pm

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

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Re: Nanao MS9-29A image rolling

Post by mRCaESaR » April 18th, 2019, 2:42 pm

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.

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