Repair/Restoration: Can I fix this broken BBC Model B Issue 7?

Описание: A little while ago, I got the chance to buy a broken BBC Model B at a good price from a nice chap off the Retro Hardware Discord called BobbinThreadbare. And being the glutton for punishment I am, I jumped at it. So here it is in all it's glory, one faulty yet salvageable, BBC Model B Issue 7!


00:58:15 Intro
02:45:14 Unwrapping and Disassembly
04:17:12 First Look
05:07:01 PSU
10:42: 10 Motherboard
13:49:26 Initial Reassembly
14:05:17 Keyboard
16:28:18 Initial Testing
17:09:26 Socket Cleaning & Power Test
18:45:12 More Testing
25:08:16 Socket Replacement & Chip Cleaning
27:42:12 When you realise YOU are part of the problem!
30:38:09 Keyboard Trace Checking
33:29:20 Those pesky LEDs
34:2:20 End Result


Parts Used:

BBC Micro A, B, B+ Complete Screw Set: https://www.ebay.co.uk/itm/126197632233

Most Caps: https://www.ebay.co.uk/str/tekkikidco...


PSU

Axial
100uf 25v x 2
100uf 250v x 2
220uf 10v x 1
1000uf 16v x 3
2200uf 16v x 1

Class x2
0.01uf 250v x 1
0.1uf 250v x 1


Mainboard

Axial
47uf 10v x 3

Radial
10uf 10v x 2
47uf 10v x 1


Keyboard





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. Remember, this is done for fun and the love of doing it!

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Or buy me a cuppa on KoFi:

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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: https://gasman.zxdemo.org/​


Background Music

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Music: Blossom by Roa is licensed under a Creative Commons License.
https://creativecommons.org/licenses/...
Stream / Download: https://hypeddit.com/roamusic/blossom
License: https://roa-music.com
Support by RFM - NCM:    • Blossom - Roa | @RFM_NCM  
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Animated Glitch effect Fast forward media sign on circle symbol. Stock Videos by Vecteezy
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