Recent content by d3jsp

did you get it completely fixed? Was it the vram?

Has anyone successfully repaired a G3 Kanga with the dreadful glass break crash sound? I have one where it chimes before the glass break. If it's bad onboard ram or cache memory, is it going to be easy to replace?

I will buy multiple fullsets :)

look on ebay and buy the ones where they have pictures with chips made by NXP or Philips

no, do not buy from there, they sell fake chips

Yup, turns out to be the 7052a. Looking around these seem to fail pretty frequently. Also, beware of fake chips from China, glad it didn't fry my board.

Yup, that is it! Works with the latest MODE32 enabled and Rocketware 1.5. Works with 128MB of ram as well. Thanks again

In the control panel of MacOS 7.1, there is an option to enable 32-bit addressing though. It crashes if that is switched on.

Is anyone able to get their Radius Rocket to work with a Macintosh IIX with 32-bit addressing? If I turn on 32-bit addressing with any amount of ram (tried 32MB, 128MB, 20MB) then it will freeze on the "Welcome to Macintosh" Logo after a reboot (this is after the Rocket Radius logo) It works...

Did you check all the address lines to the ASC chip? If will act this way if any of them are broken I believe

Got them here by the way, as they do look kind of sketchy: https://www.aliexpress.us/item/3256806577569338.html

with the original chip, I am getting pin1 VCC at ~ 12V and pin 4 at 5v and pin 5 and 8 at ~5.8V Even though it doesn't work and there is no sound, the chip does not get hot at all. This leads me to suspect if these chips have different specs or did I get fake Chinese chips?

Swapped for another DA7052A from aliexpress but still no sound. The new chip is getting extremely hot even though the input measurements look correct from specsheets pin1 VCC ~8V pin 4 mute is ~0.9V. This goes to pin 40 on the 2300 instead of 37 like what is in bombarc's schematics, strange...

The headphone jack itself is fine. Traces around speaker looks fine too. My guess is that it could be the TDA7052A amplifier chip? Since it doesn't seem like headphone sound goes through this

Have a 840av that is already recapped with red polymer caps. Sound from the headphones jack work just fine but onboard speaker is intermittent. Sometimes it works and is loud, but most of the times it's extremely faint or nothing at all. I would assume this is a bad c48 from bomarc's...