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Author Topic: Data East Hybrid RCDM_I107  (Read 239 times)
mikemcbike
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I'm the universal solder


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« on: October 24, 2018, 01:45:53 PM »


Hybrid RCDM-I107 reverse engineered

for example with Caveman Ninja, Data East created a PCB filled up with custom ICs and funny ceramic hybride circuits...
If you connect the JAMMA the wrong way, at least one RCDM_I107 gets fried by the 12V audio supply voltage.
If you are unlucky, your custom 104 gets killed, too. You can rename it to 404 - function not found... Grin

I was curious, what's inside a I107 and how it can be replaced.


* caveman_04.jpg (192.25 KB, 1200x800 - viewed 23 times.)

* caveman_05.jpg (327.56 KB, 1200x800 - viewed 22 times.)

* caveman_06.jpg (253.68 KB, 1200x800 - viewed 24 times.)
« Last Edit: October 24, 2018, 01:51:57 PM by mikemcbike » Logged
mikemcbike
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I'm the universal solder


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« Reply #1 on: October 24, 2018, 01:53:56 PM »

a combination of 100R/1k (original) or 100R/10k (see photo) is perfectly working. You neither need the capacitors nor the protection diodes...

Here's the full story in German language: http://www.wolfgangrobel.de/arcadereps6/caveman.htm


* caveman_07.jpg (278.55 KB, 1200x800 - viewed 24 times.)

* caveman_09.jpg (65.4 KB, 600x400 - viewed 52 times.)

* caveman_10.jpg (28.55 KB, 600x427 - viewed 54 times.)
« Last Edit: October 24, 2018, 01:56:51 PM by mikemcbike » Logged
smarty
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Hampshire, UK.


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« Reply #2 on: October 25, 2018, 08:06:02 PM »

Nice work Smiley

You have a good website too, lots of good info and repair ;logs on there, I like your IC list PDF. Seems like a good quick reference for lots of devices.
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www.jumpnfire.com

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mikemcbike
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« Reply #3 on: October 26, 2018, 07:04:27 AM »

Thank you very much, smarty!
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Laszo
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« Reply #4 on: November 11, 2018, 09:49:30 PM »

👍 nice fix
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