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LC 475 Project - Upgrades - Mods
- Thread starter Kamshaft
- Start date
That video is for a zero. Not sure if it's the same.
I want to second that. I would definitely pay for a 475/605 L2 cache card/thingie.
You are right, different board. It seems that neither your nor mine board does have prepared place for a antenna plug
I had a look at the PCB, I'm sure it's doable. lol The PCB is pretty small...would need a surgical soldering station!You are right, different board. It seems that neither your nor mine board does have prepared place for a antenna plug
So, the floppy drive in this machine works, but the action of the disks going in and out is rough (The drive mechanism is a dirty/gummy). Basically it needs a good cleaning. Are there any good disassembly videos or web pages that you guys could recommend? My initial google search came up with a couple but I imagine Apple put all sorts of brands of floppy drives in their LC 475 machines.
Are you able to share a photo of CPU prior mounting heatsink and a detailed photo of RAM module?
The 68kmla wiki used to have an excellent page on the floppy drive disassembly and maintenance. Not sure if it’s still there.
This is the link that used to go to the page: http://68kmla.org/wiki/index.php/Floppy_Drive_Lubrication
However, it’s no longer loading.
However, it’s no longer loading.
K4E640412D-JC50: 50ns, 4k Refresh 3,6V maximum Supply Voltage.
No Voltage regulator visible on front side.
So we learned: Even out of specification may work.
Are the chips getting hot?
K4E660412D Datasheet pdf - 16M x 4bit CMOS Dynamic RAM with Extended Data Out - Samsung Electronic
K4E660412D datasheet, K4E660412D pdf, K4E660412D data sheet, datasheet, data sheet, pdf, Samsung Electronic, 16M x 4bit CMOS Dynamic RAM with Extended Data Out
www.datasheetcatalog.com
So we learned: Even out of specification may work.
Are the chips getting hot?
The project thus far is nearly done.
All I have left is to clean and lube the floppy drive, and replace the caps in the power supply unit.
CPU Note: The heatsink on the 33mhz CPU gets pretty warm, but not crazy hot of anything. It's a full 68040 and it's native 33mhz. Not overclocked.
All I have left is to clean and lube the floppy drive, and replace the caps in the power supply unit.
CPU Note: The heatsink on the 33mhz CPU gets pretty warm, but not crazy hot of anything. It's a full 68040 and it's native 33mhz. Not overclocked.
Very normal for these
Just an FYI...I had to wet sand the bottom of the heatsink "flatter", since it wasn't totally flush/level when it arrived, what do you expect for $5
Plus, I bought this roll of thermal tape, got lots left! LOL - https://www.amazon.ca/dp/B08LTZTGR1
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How about RAM Chips?
Is there a voltage regulator on the back side of the Module?
