My genesis 2. crystal clear audio mod, cxa1645 region switch

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My genesis 2. crystal clear audio mod, cxa1645 region switch

Postby Drakon » January 23rd, 2012, 1:20 am

Like the title says this system started out as a 15$ va 1 genesis 2 with the terrible ka video encoder that can't do s-video and horrible sounding audio. I bypassed the original audio circuit and built / installed tiidos amazing crystal clear audio circuit. I also bypassed the ka encoder and installed a cxa1645 video encoder kit giving me both the best video and audio possible out of a genesis. For the finishing touch I installed a region switch to play my japanese imports. Here's some pics and a demo video:

crystal clear audio mod circuit after I finally finished it:

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system all built and put together:

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demonstration video:



Screenshots

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http://consolemods.forumotion.ca/
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Re: My genesis 2. crystal clear audio mod, cxa1645 region sw

Postby Bacteria » January 23rd, 2012, 12:54 pm

Nice work. You say though you installed a CXA into your system - any chance of a pinout/guide? (also the audio too).
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Re: My genesis 2. crystal clear audio mod, cxa1645 region sw

Postby Samuel » January 23rd, 2012, 3:06 pm

Awesome! :thumb: Definitely need to try that audio mod myself sometime.
My blog: http://samsmods.blogspot.com/
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Re: My genesis 2. crystal clear audio mod, cxa1645 region sw

Postby Drakon » January 23rd, 2012, 8:16 pm

The cxa1645 circuit is the one found on this kit here:

http://homepage3.nifty.com/F-LABO/ProductsList.html

Instructions are all in japanese. I found the encoder in the genesis 2 and located the INPUT pins for rgb, sync, and colour subcarrier (xtal in / oscillator in). It's important to tap the pins from the inputs of the existing encoder because tapping them after they go through the onboard encoder will cause a decrease in video quality. Then I soldered those wires to the kit pcb where it inputs rgb, sync, and the colour subcarrier line I wired to where a crystal oscillator on the pcb normally outputs a timing signal (I removed the kit oscillator). It's better to use the colour subcarrier line built into the system as this syncs the cxa1645 perfectly with the system creating a perfect quality image. The other things I wired to the kit were vcc (5v) and ground. Then the kit has rgb, s-video and composite video output pins that you can wire to any connector you like.

There's no available schematic online for the cxa1645 kit I used so you either need to buy the kit or design your own circuit.

Here's the crystal clear audio mod diagram and instructions:

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This audio circuit will only work on model 2s that produce audio from an asic circuit. Probably just the va0 va1 and va1.8
http://consolemods.forumotion.ca/
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Re: My genesis 2. crystal clear audio mod, cxa1645 region sw

Postby Drakon » January 24th, 2012, 1:40 am

I made a video showing the difference between the audio from this console before and after I installed the crystal clear audio mod. I can't stress enough how amazing this audio circuit is.

http://consolemods.forumotion.ca/
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