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My C128D refurb project.
 
 
There she is... First picture unpacked from its shipping box. This thread will be about this C128D, serial number DA 4 87727, and it's restoration/gaming/programming.
Bit of history first, then more pics.
 
Lol I was going to.post up a bunch of pictures straight away, but I couldent resist to see if it would turn on.. and it did.. lol.... BUT... PSU is toast, has arching noises and the fan winds up and then down... So I pulled the cover straight away and took a look.. yep PSU is toast... Needs to be fixed/replaced... Any tips on what will fit in here guys?
And another very worrying thing I saw is this... Not really sure what this board is, but the cable at the back is completely disintegrated and the cables inside touch.. so that can't be good..
See pics
 


All those cables are touching as the insulation has disintegrated.
I removed the metal cover over the 1571 as it's not working and thought possibly that it was just broken, but the more I think about it, the more I think that the PSU is to blame here, those wires touching each other can't help either I bet..:/
 
the PSU turns on, and the system boots, but you can hear it arching and the fan winds up and down.. does the 128 PSU output the same as the c64 one? I just purchased a new dual output one for my c64, so I wonder if I can replace this PSU with that?
 
 
well as the saying goes...
When the cat is away, the mice will play.. lol, so the missus and kids are outa town, getting away from the heat in Brissy, so thought id take a moment to take stock of this C128D and see if i can figure out wtf is going on with it.
Took the whole thing apart today, screws and nuts went everywhere.. lol and i think i have figured out what the issue is with the PSU.
After taking the whole thing apart, and removing the PSU, opening it up and having a look, i then plugged it in, and the fan winds up and down, and then stops, arching/burning smell the whole time, then moving the power leads a bit, it starts up again, and still the sparking /arching noise, which i can now see where its coming from.
which is the choke.... (think thats what that thing is).. the big yellow thing..
The PSU itself looks like to be in great nick, , no building caps or much dust.
anyways, i hope to hear from you guys, if its possible to be the choke, as its kinda a dead give away as i can see it sparking/arching at the bottom of it. could it be a loose solder, I've inspected the back, but all seems in order.
now to find a replacement..
RN232-1.0/02
1.0A/250V
2x 18mh 8KC
written on it.
any ideas where i can get one of those?
 

And a few other pics.
 
 
 
 
 

I Just fixing that FDD cable now with some IDE wire. took me a bit to figure out how to dismantle that plug without wreaking it.Thanks for the heads up Thalyn ,about the connector, but i am going to try to keep these plugs. Unless my soldering becomes completely crap.
 
Half done. ;)
 
 
 
And this wasnt too bad to pull apart.
Lucky the plastic isn't brittle.
 

And the finished product..lol
Prob a bit long? But if so I'll bend it over in the case.
 

;)
While the whole thing is apart and iam waiting for a new Choke to turn up, just looking at the VDC of this unit, can anyone tell if the 64k upgrade has been done? if it hasnt, now is probably a good time to order those bits?  there are 2 options from what ive seen?, the remove and replace, and the solder-less version?
any idea which one to go for?

 

and i just found my Choke..
now just gotta get the guy to agree to send me 2 to Dubai.
on the subject of VDC, my chips are 4264-15 each in the slots, now i am having a tad bit of trouble figuring out is these are 16k? or have these already been upgraded, i am only asking cos the solder on those 2 chips seems newer than the other side?

 

More to come..  the adventure continues... :D

 

 

 

 

 

Edited by: Vanne on 2019-06-28 00:03
Very cool!  And its a "real"

Very cool!  And its a "real" C128D also!

Re: C128D refurb project

Vanne wrote:

> on the subject of VDC, my chips are 4264-15 each in the slots, now i am having a tad bit of trouble figuring out is these are 16k? or have these already been upgraded, i am only asking cos the solder on those 2 chips seems newer than the other side?

I would say they are 16K. A new 64K expansion is coming. Here is what Francois "Eslapion" Leveille says about it --

My friend Francis Bernier will soon be offering a new type of 64k RAM expansion for the VDC.

"The traditional type of 64k expansion board for the VDC simply disconnects the two 16k x 4 DRAM chips from the mainboard and offers a pair of sockets for two 64k x 4 DRAM chips. Francis's new type is much smaller, consumes much less power and uses a single static RAM chip."

(snip)

"Pricing at 18$US per unit. Just send me a PM once we have a few boards out of the fab."

Truly,
Robert Bernardo
Fresno Commodore User Group - http://www.dickestel.com/fcug.htm
August 10-11 Commodore Vegas Expo v15 - http://www.portcommodore.com/commvex

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