Model 3 Sound amp (from a New Astro City)

Arcade cabinet hardware and accessories
User avatar
markedkiller78
Pony fucker
Posts: 7617
Joined: August 17th, 2008, 6:53 pm
Location: Glasgow
eBay: markedkiller78
Initials: MAL

Model 3 Sound amp (from a New Astro City)

Post by markedkiller78 »

My latest Model 3 question.

Both my NACs have this sound amp. Image

Both handle stereo without any problems, but the mono over jamma is tinny & has a lot of interference. Cools has kindly poked about with the multi meter & thinks that the resistor at R1 has blown. We can't get any reading off it at all. Do you think this could be the problem?

Image

The resistor is rated at 10 Ohms, I think :? Would you expect a reading from this? Any help would be greatly appreciated.
Image
User avatar
CPS2
Street Fighter
Posts: 1993
Joined: August 19th, 2008, 10:03 pm
Location: Leeds

Re: Model 3 Sound amp (from a New Astro City)

Post by CPS2 »

Is it the same on both amps.?
Ordyne
Please Continue...
Posts: 72
Joined: October 9th, 2008, 9:09 am
Location: Barnsley, South Yorkshire

Re: Model 3 Sound amp (from a New Astro City)

Post by Ordyne »

Have you tested the resistor out of circuit?
Craig Walker • Giz10p • http://www.giz10p.co.uk

Specialists In Amusement Equipment Spares & Repairs
User avatar
markedkiller78
Pony fucker
Posts: 7617
Joined: August 17th, 2008, 6:53 pm
Location: Glasgow
eBay: markedkiller78
Initials: MAL

Re: Model 3 Sound amp (from a New Astro City)

Post by markedkiller78 »

Same one both (the other blew last night)

Yes, tested the resistor & there was still no reading. Just been to Maplin & bought 2 x 10 Ohm resistors & one has been soldered back on by Cools :awe:

We'll soon know if it works
Image
User avatar
markedkiller78
Pony fucker
Posts: 7617
Joined: August 17th, 2008, 6:53 pm
Location: Glasgow
eBay: markedkiller78
Initials: MAL

Re: Model 3 Sound amp (from a New Astro City)

Post by markedkiller78 »

Fixed :awe:

The 10 Ohm pictured had blown, on both cabs :?

I now have one working, time to move on to number 2. Thanks for the input guys.
Image
User avatar
cools
Armed Police Buttrider
Posts: 13617
Joined: August 17th, 2008, 4:49 pm
Location: Wales, United Kingdom
eBay: hordarian
Initials: CLS

Re: Model 3 Sound amp (from a New Astro City)

Post by cools »

32p to fix both amps :D
Image