NANAO MS-2930S service manual

[Capoz]

Please someone have the service manual of a NANAO MS-2930S?

I need it for try to repair it, it works perfectly at 31 but no image at 15

thank you to all

Aldo

[Neo25]

i also need this manual.
my screen only works in 15khz mode. 31khz will not work
thanks

[urbanledge]

Mine only does 15k too

[grantspain]

watch out for a faulty switch on the control pcb for the frequency setting,easy to prove by using a multimeter to check continuity whilst operating the switch
someone else on this fourm had the exact same issue and i have seen it happen on one chassis myself

[zumbito]

Please someone have the service manual of a NANAO MS-2930S?

I need it for try to repair it, it works perfectly at 31 but no image at 15

thank you to all

Aldo

This is quite old, but how did it go?

[hanyou]

I second the request for the service manual.. I picked up 2 dead MS-2930S and have found very little info about them.

One has no glow on the neck and no static, found it had a shorted HOT. Replaced caps and HOT with one out of the other machine and was able to get static and brief neck glow, then it blew the new HOT. I am pulling all of 8v from the +B.

Other had static on startup and very minor glow,then shut off after about 10 seconds when the protection circuit kicked in. Cap kit led to no change. I was able to get 180v from the +B until the circuit kicked in.

Checking through the snubbers until I get my new HOTs, hoping to have progress soon so I can swap them from Mahjong cabinets into a proper NeoGeo/Castlevania.