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Main => Monitor/Video Forum => Topic started by: vandale on January 16, 2014, 04:29:26 am

Title: NANAO MS9 Fault
Post by: vandale on January 16, 2014, 04:29:26 am
Hi, purchased a Sega Astro cab today, has a Nanao MS9 in it. When powered on this is the fault as pictured. I have 2 MS9 tubes and both display the same so its got to be the board. I have had a quick check over visually and everything looks ok.

Any idea what it could be or where I should start looking?

Thanks
(http://i40.tinypic.com/e9sznd.jpg)
Title: Re: NANAO MS9 Fault
Post by: grantspain on January 16, 2014, 10:55:10 am
have you put a video signal into the chassis yet?
Title: Re: NANAO MS9 Fault
Post by: vandale on January 16, 2014, 03:00:45 pm
Quote from: grantspain on January 16, 2014, 10:55:10 am
have you put a video signal into the chassis yet?

Hi, yes. Image is visible and ok looking on the right but dark on the left.

Should I do the caps as a matter of course?
Title: Re: NANAO MS9 Fault
Post by: grantspain on January 16, 2014, 06:31:46 pm
yeah caps are an issue on ms9,in particular the 10uf 250v on the neck card
there are a bunch of caps near the deflection processor that go leaky and a bunch in the power supply section-many are weird values such as 1500uf
Title: Re: NANAO MS9 Fault
Post by: vandale on January 17, 2014, 05:50:23 am
Quote from: grantspain on January 16, 2014, 06:31:46 pm
yeah caps are an issue on ms9,in particular the 10uf 250v on the neck card
there are a bunch of caps near the deflection processor that go leaky and a bunch in the power supply section-many are weird values such as 1500uf

Thanks. Here is a pic of it running Alien 3 The gun.
(http://i39.tinypic.com/29bizh1.jpg)
Title: Re: NANAO MS9 Fault
Post by: grantspain on January 17, 2014, 05:22:31 pm
neck card cap first and check bad solder joints on crt socket
Title: Re: NANAO MS9 Fault
Post by: vandale on January 18, 2014, 05:44:43 am
Quote from: grantspain on January 17, 2014, 05:22:31 pm
neck card cap first and check bad solder joints on crt socket

Thanks, will replace the cap and check for bad/dry joints and report back.

Appreciate the help
Title: Re: NANAO MS9 Fault
Post by: vandale on January 20, 2014, 05:10:27 am
Quote from: grantspain on January 17, 2014, 05:22:31 pm
neck card cap first and check bad solder joints on crt socket

I checked the neck card cap and it had no dry joints but it was very loose on the neck so I removed the cap and adjusted the terminals to grab harder when the neck pins are pushed in, while I had the card off I replaced the 250v 10uf cap also, the old one looked ok, no leaks or swelling.

Installed and wallah, needs the pic tuned but fault is now fixed.

Many thanks for the help. I have another Nanao but its a MS8 and it doesn't power on, will start a thread on that :)
(http://i43.tinypic.com/zxogwl.jpg)