DMRECONE

Yes , I found the same chip and others with different screened lower marking. I'm hoping I can get more clarity on the lower marking from Renesas. I'm thinking it might be either date coding or end user specific code for installed firmware.

OK after some very intensive searching and a bit of shear luck, I think I may have found out a little information of the IC. It appears to be a RENESAS R5F211B4SP R8C/1A Group, R8C/1B Group SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER. The chip is now obsolete and out of production as far as I can tell. I submitted a service request to Renesas for more information on the screened markings on the chip. The datasheet does state that some models of the chip can be preprogrammed by the manufacturer. Now I'm waiting for a reply and maybe more information on the specific properties of this particular model of the chip. I hope the chip is not damaged as finding the firmware I'm sure will be impossible. Since Sunfire became a subsidiary of Nice North America service and tech info is pretty much non existent from the manufacturer.

Thanks for the reply. That is what I generally do for an unknown part if I can't find a datasheet or any info. Thought I would at least ask and maybe someone here might know. I suspect it might be an eprom since it is connected to a 4 pin header and those are usually for loading firmware. It does connect to the micro-controller. It's a shame more schematics aren't available for Sunfire units, after all if someone wanted to steal the design they would just reverse engineer it anyway, but that's just the way it is with intellectual property.

Thank you Sk1Bum - Here's the IC I can't find anywhere.

I wanted to add a picture of the IC I need to identify but I don't have the points yet to add a picture or a link to it.

I already tried both sites. Sunfire site is useless and only refers to the Nice site. I emailed nice and they referred me to EBC Electronics and they replied they have no schematics. Seems the only option now is to go without or try to find some in the wild. I will try a couple of things I suspect and if I have no luck I will need to refer the customer to somewhere else. Thanks for the reply.

Hello, My name is Dan and i have a speaker and electronics repair business. Right now I have a Sunfire SDS12 in for repair. I need a PDF copy on the schematics for this unit. I have already repaired the power supply board but the unit also has a fault in the preamp/amplifier board. I could really use a set of schematics to help trace down the fault. Any help is greatly appreciated.