Ic 15

A place to discuss everything Dragon related that doesn't fall into the other categories.
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SimonGG
Posts: 4
Joined: Wed Sep 09, 2015 8:21 pm

Ic 15

Post by SimonGG » Wed Sep 09, 2015 8:32 pm

Hi all
I've just recently got a d32 off eBay,had one as a kid and wanted to get my hands on one again. Unfortunately I took a gamble an the one I got isnt working. What I've noticed straightaway is that IC15 is missing! Theres just a socket ,no chip. I was hoping someone could point me in the right direction... So far from googling I've found out its the mc6883 Sam chip, can I get one from anywhere? I must point out I'm no electronics guru, just someone that likes to tinker.
Many thanks for any help I received, really wanna try an get this up and running again
Last edited by SimonGG on Thu Sep 10, 2015 10:35 pm, edited 1 time in total.

KenH
Posts: 177
Joined: Fri Oct 12, 2012 9:50 am

Re: Ic 15

Post by KenH » Thu Sep 10, 2015 6:14 pm

MC6883 is the Dragon SAM chip, also known as 74LS783.
You can find replacements on eBay, search for 74LS783
For example: http://www.ebay.com/itm/1PCS-SN74LS783N ... 566bb4a2f3

SimonGG
Posts: 4
Joined: Wed Sep 09, 2015 8:21 pm

Re: Ic 15

Post by SimonGG » Thu Sep 10, 2015 7:05 pm

Many thanks will take a look

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tormod
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Location: Switzerland
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Re: Ic 15

Post by tormod » Thu Sep 10, 2015 8:23 pm

Hi Simon, welcome to the forum! I wouldn't be surprised if a few other parts are broken too since this one probably got "sacrificed". But we're here to help - and most spare parts are easy to get. Good luck with getting it back in order, we would love to see another Dragon rise from its beauty sleep!

sorchard
Posts: 395
Joined: Sat Jun 07, 2014 9:43 pm
Location: Norwich UK

Re: Ic 15

Post by sorchard » Thu Sep 10, 2015 8:59 pm

Hi Simon,

74LS783 also available here though a bit more pricey: http://www.littlediode.com
Stew

SimonGG
Posts: 4
Joined: Wed Sep 09, 2015 8:21 pm

Re: Ic 15

Post by SimonGG » Thu Sep 10, 2015 10:25 pm

Thanks all for your replies

SimonGG
Posts: 4
Joined: Wed Sep 09, 2015 8:21 pm

Re: Ic 15

Post by SimonGG » Sat Sep 12, 2015 10:46 am

Hi All, good news bought a new IC off eBay and fitted it this morning. Dragons working :D . Only problem I've found so far is keys 1-8 have to be pushed really hard to work so going to look into cleaning the keyboard switches .
thanks again for everyone's help

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