Repair/Restoration: Faulty Atari 7800
Ойын-сауық
I bought this in February past to help fill a gap in my collection off of eBay. It was sold as 'powers on but unable to test further as no RF input' so I took a gamble as the price was reasonable. Well, in classic eBay style it was dead so lets try to bring this back to life!
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00:45 Intro
04:56 PSU
07:01 7800 Disassembly
08:09 Motherboard
11:09 Peripherals - Control Pads
13:59 Peripherals - Paddles
15:43 Testing
17:07 Checking Voltages
17:59 Scoping the board
20:44 "Sally" and Power Button
22:10 Second Test & New Fault!
23:16 Fault Finding the P1 Port
24:19 Broken by Someone Else!
26:38 Final Test
27:12 what About the 2600 Carts?
Parts Used:
PSU
1 x 4700uf 16v Capacitor
Mainboard
1 x 6502C "Sally"
1 x LM7805
1 x 2N3904 NPN Transistor
2 x 220uf 16v Capacitors
1 x 2200uf 16v Capacitor
Capacitors and Transistor from www.ebay.co.uk/str/tekkikidco...
6502C "Sally" from www.st-freakz.co.uk
I am not and do not claim to be an official or qualified repair technician. Everything shown here is for entertainment and educational purposes only and I shall accept no liability for any damage or issues caused by copying what I do. Remeber, this is done for fun and the love of doing it!
You can support me on Patreon: / retrokrazy
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Intro (Shiny Demo) and Outro (FlippenFlappen) Chiptunes ceated by the talented Gasman and used with permission. Please check him out here: gasman.zxdemo.org/
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Пікірлер: 7
If you are going to do all that then fit some heatsinks. Thanks for the video.
@RetroKrazy
4 ай бұрын
Yep, something I don't normally do and not sure why? Especially on machines that are known for failure of certain chips!
Isn't that "Sally" originally on the board just a vanilla 6502?
@RetroKrazy
4 ай бұрын
I did some digging at the time and found a number of images showing that CPU being used in the 7800. Ironically, when I was chatting to RetroHQ, he also had that exact same CPU fail on him on a system. Could be they are just bad CPUs? Certainly the CPU looked original underneath. No obvious signs of reworking - well not like the obviously badly fitted resistors ;-)
@jasejj
4 ай бұрын
@@RetroKrazy Possible, I've used those UMC 6502s to repair other 8-bits in the past and they seem solid enough but who knows. My question was more that the model number doesn't appear to suggest it's anything special - we're they just putting in vanilla 6502s from the factory? Which reminds me, I just got a few 6502s from China - need to check them out...
💥 Promo`SM
@RetroKrazy
Ай бұрын
Thanks, I think... ;)