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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...

looking at the error code in service mode in address fcc017 says 10 ERROR: invalid format parameter

Trying to isolate a problem on a potentially fried IO floppy controller, does anyone know if the Lisa will return error 57 without the "Lite" Interface Card plugged in? Mine is returning the error without the interface card, or with the interface card + floppyemu. But no error with original...

What should be the correct orientation? I aligned pin 1 (the red line) on the right, with mark J1 on the board and the ESP board just caught fire and completely fried the Lisa IO board.

Yeah, I think that might be what happened. Would the damage be to the LS157, LS245 and 344-0041a

Now it just goes to the insert floppy error and doesn't even attempt to read anything. Occasionally it will return error 23 or error 25 if I reset floppy emu

Recently ordered an esprofile internal from juicycrumb and plugged into my lisa from the widget data port. Since my lisa didn't come with a widget power port I powered the board using a micro USB cable on the ESP32. It didn't work. Initially the lights turned on on the esprofile board but went...

Thank you! That helps a lot. Mine is way off. Does anyone know the correct resistance for the "width" pot on the video board? Mine says 200 ohms but measures around ~270 already around the mid point. And how to get replacements that fit?

Does anyone know the correct voltages for each pin on U2 TDA1170N?

Looks like maybe a bad R24. Voltage drops from 31V to 3.5V. It measures at 150 ohms but should be ~120 ohms according the schematics. Would it cause that much voltage drop across both sides of the resistor?