ToToTEK.COM

Hi Mystic_Merlin,

Thanks for the invite link and great to see you there!

Kind regards,

Rodney

Hi Mystic_Merlin,

It's great to read your reply. Thanks for letting me know about your Super Magicom and Supercom software versions.

I checked my ~200 C64 floppies and finally came across the fi ...

I have checked more things because I felt something is not right, I was not able to use a Winbond W27C512 to test BIOS images previously.

I found the cause, the A14 line on the EPROM socket is conn ...

Hello everyone,

I have been looking at my Supercom Pro.1 again for nostalgic reasons because it was my first introduction into the concept of running SNES games from floppy disks.

I have seen lo ...

Hi Alby,

Can you check the PCB to see if there are any splatters anywhere from battery chemicals?

My suspicion is that there are some broken PCB tracks because of chemical spill. It could be a c ...

Hi Mystic_Merlin,

Yeah I think it's important to be clear about technical things. Not everyone can be a technical expert and sharing knowledge and experience to help others are some of the importan ...

Hi Mystic_Merlin,

Sorry for a late answer, I have been very busy with work the past weeks.

I agree that the 'exploded' version of copiers with more chips makes reverse engineering more easy, tha ...

Hi Mystic_Merlin,

For replacing or adding RAM chips I would advise anyone to check the type of RAM for "Fast Page" DRAM, or "EDO" DRAM type, to add or exchange with the same typ ...

Hi Mystic_Merlin,

A small soldering advice. Smile

The only way to (in a normal way) desolder such chips is to apply enough heat to all it's pins at once, just long enough to loosen the chip. SMD ch ...

Hi system64,

The part is a small capacitor. I don't know this adapter myself but the capacitor looks like it might fit between some IC pins somewhere on the solder side of the pcb.

The photo is ...

Hi Mystic_Merlin,

I'm glad to be of help, only sorry that the conclusion is negative for your copier. Wink

If you understand the basics of what the copier does it goes a long way in understanding ...

Hi Mystic_Merlin,

It's a bit strange about your test results. I mean, normally speaking there should not be a voltage difference between the power pins of your copier and the power pins at the &quo ...

Hi Mystic_Merlin,

So now we can also rule out the Goldstar FDC chip.

After taking out the hot IC the 5V remains stable.
So we can conclude two options:
- the IC is faulty and when connecting ...

Hi Mystic_Merlin,

You are welcome. Smile

Ok so we can rule out that it`s the RAM. It`s lucky that the 7805 cuts down the output voltage when too much current is drawn. This protects the copier in this ...

Hi Mystic_Merlin,

From what I read I would suggest two possible causes:
- the chip which overheats is defective
- the chip which overheats is too heavily loaded externally by a short circuit some ...