Fixing a Sinclair ZX Spectrum 128k +2 Datacorder... and using a Buck Regulator on a Spectrum??
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- เผยแพร่เมื่อ 1 ก.ค. 2024
- - This video is sponsored by www.PCBWay.com -
I bought this Sinclair ZX Spectrum 128k +2 as "Spares or Repairs". The seller told me that the tape deck didn't work, so it had been used for parts! We're going to look at the machine and get it running, then tackle the broken Datacorder!
🤞 PLEASE HELP MARK FIXES STUFF SURVIVE 🏆: Due to "The Event" my livelihood vanished in a puff of smoke. If you can spare some change to help support the channel it is really appreciated and even the smallest pledge goes a long way in helping make more content and feed my cats (and children). Visit / markfixesstuff for more info about Patreon Benefits!
00:01 - Intro and examination of the Sinclair Spectrum 128k +2 (Grey).
00:18 - Missing parts.
00:40 - Plans for fixing the 128k Speccy
00:50 - Mark Fixes Stuff Intro
00:55 - PCBWay Sponsor Thanks
01:09 - Can I replace a LM7805CV with a buck regulator like a RECOM?
01:40 - Advantages of using a buck regulator instead of a 78XX regulator.
02:00 - Wiring up a generic Chinese 5v buck regulator without soldering.
02:34 - We're using this Retro Computer Shack RGB SCART cable.
02:40 - Getting the main computer board of the Spectrum +2 working.
03:35 - Testing the Sinclair ZX Spectrum 128k +2 with a modern buck regulator.
04:18 - Examining the broken Spectrum +2 Tape Deck.
04:30 - Mechanical examination - Play / Rewind / Fast Forward.
05:28 - Flywheel not turning correctly due to fouling by the eject latching mechanism.
05:57 - Removing the Metal flywheel on the Spectrum +2.
06:43 - Fixing the small white plastic piece that is touching the metal wheel in a Spectrum +2 Gray.
08:05 - What lubricant can I use on plastic and rubber that is plastic safe?
10:30 - Installing a new Datacorder belts in the Sinclair ZX Spectrum +2 Grey.
11:25 - Checking continuity beween the ground connections on the Datacorder board and the metal chassis of the datasette.
11:53 - Cleaning the heads on a Sinclair ZX Spectrum 128k +2 Datacorder Casette Deck.
12:50 - What type of screws can I use to replace the screws on a ZX Spectrum?
13:25 - Testing the repaired Sinclair ZX Spectrum Datacorder Casette Deck
14:16 - Test load from an original vintage Sinclair Spectrum Cassette.
15:31 - Patreon Supporter thanks!
15:51 - Further retrogaming and computing repair viewing! - วิทยาศาสตร์และเทคโนโลยี
Thanks, I had the issue with the pause mechanism and indeed the white plastic bit was grinding. New belts, greased and your fix means I can now load games again without failing all the time.
I can't thank You enough for the tape deck latch fix - I was ready to call my 128K +2 a "DivIDE only" machine, because of deck failure which I considered to be a "game over" problem. Now I know better - thanks to Your howto ;-)
Got to love seeing our friend the Speccy coming back from the dead! - Sir Clive bless' you!
Cool video my friend ;)
Lovely stuff! Thanks for watching!
GRIP THAT SPIGOT !!! Ooof!
Hi Mark, I didn't realise you could pul the capstan flywheel thingie off the shaft, I normaly take the circlip off the other side and pull the shaft out with the capstan attached, might give this way a go next time, not sure if you can buy the circlips to replace them as they can get damaged, I also had to remove the other white wheel last time on a 2A mechanism, it was running slow and clicking, the eccentric cam under the white wheel needed greasing it had dried up, worked nicely afterwards though :-)
I like it when you give us your little tip.
thanks
What a great find. I've never seen that pause latch fault before.
This probably happened to mine, unfortunetly I didn't find a fix in the 90's
ZIP ZAP!!! my 1st speccy game with mindeout, and space raiders, on my 48k speccy, brilliant xmas that was
Another great success. Oh and Zip Zap was the first Spectrum game I ever bought. 👏
Cheers Bobbus.
Zip Zap seems a bit Cr&p?
@@MarkFixesStuff yeah it's a bit naff. I hadn't read the review on Crash before I bought it though. 🤷♂️
Nice!
FWVLIW: I wouldn't suggest not fixing one of these properly but a mod I rather like is you have a +2 with a completely ronnied tape deck is the cut that end off the case entirely! Then glue the far end on to the hole left by cutting the tape deck off. If properly measured and done with care it will look like it was meant to be like that. A buck regulator as there's no room for the heat sink, a suitable storage device, and away you go!
What buck regulator are you using? This one seems a bit naff and the machine sometimes resets. I'll cover it in part 2 but need an option.
I had exactly the same fault with the pause latch on a +2a. Also zip zap is a classic! Great vid!
Thanks! 👍
Wonderful, perfect video explaining it perfectly well. I don't have that model, but it couldn't be better.
I’ve emulated the +3 but it makes my GPU get very hot.
Liking the dance of success
The Jig of Joy!!
Nice video as always, one little tip that I think you should mention - when you put screws in you turn half a turn backwards to align the thread before screwing in. You clearly do this in the video and this is a sign of a proper engineer at work in my opinion but I'm not sure everyone knows this tip!
I have mentioned it in a few videos! I have to be careful not to annoy the viewership though haha. I do see some people cutting a new thread and it makes me wince.
Awesome video as always! I have never seen one of these. Pretty cool design. like a console/computer hybrid.
Always love these vids
Thanks geezer!
Great fix mark, something I need to do myself when I actually get 5 minutes.
I know that feeling. Time flies.
Another great Retro Mark’s Cave, Trash to Treasure...
My format is actually called Retro Resurrection, but this isn't bad enough for one of those!
@@MarkFixesStuff Any good at fixing 80s hifis? At some point quite like mine serviced. Tape deck no longer works, but the rest is still going... Probably needs capping and such... Make an interesting sponsored video maybe. Although just been hit for new speccys yesterday.
The metal pin which the pinch roller rides against is called the capstan, I think you were calling it a spindle. The spindles are the black cogs which fit into the sprockets in the cassette reels when you put a tape in.
I remember have one and a Commodore 64……..
nice vid,, lesson of the day .. i always though that pause thing was meant to push against the flywheel .. ohh AV107 that is the 70mm one .. i use AV102 for the specie (65mm) and AV107 for the amstrad cpc..
Mark II Fixes Stuff.
I was always told to avoid IPA on rubber parts. Was that just me? Anyway, thanks for this video. I've never tested the tape deck on my +2 -- I should probably do that some day. :)
Yes, really it should mostly be avoided but occasionally a quick wipe with IPA on very old rubber rollers will bring the grip back. A safer option is window cleaner.
You probably have one but if not I recommend the Divmmc. So much better for loading games.
I have four or five different models of them. I just like repairing / building stuff!
Can you please try the rf output with that buck convertor fitted?
Sorry. This machine was destroyed in the fire.
Hi mark I have a 128 plus 2 with no power it’ has no heat shield same as yours in the video
A thimble over the thumb pushing on the spindle could be something to try next time - then you should be able to carry on pushing the flywheel with your fingers while looking at that side and maybe not have to back it off a bit afterwards?
Bonus: you get to confuse people by having sewing equipment alongside electronics repair tools.
Great tip! Thank you.
I first thought you had a really big crack in your bottom, but now I can just see it's very hairy...
-Dx
Oh Dee... lol 😂
I tried a switch mode regulator on a Ql and the rf output went crazy. Dont know if the monitor output would be ok. Or if the rf would be ok on a plus 2. Needless to say i put the original regular back on its heatsink but with heatsink paste, it didnt have any.
A very useful tip Mark. Is this problem specific to the 128K Spectrum Datacorder?
In my experience it’s quite common on the grey +2
What did you end up doing with the buck regulator? I assume it didn't end it's days hanging out the back.
Not really sure if it will pass testing yet, but there’s a second video in the works where we’ll do the video fixes and balance the AY audio with the beeper sound (it’s really unbalanced). We’ll decide on that video. :)
Ahh the speccy. Do you know if there is a way to hook up any Dial-up modem to the speccy with some sort of conversion from the edge connector to DB25?
Umm. Not as such but there was this...
worldofspectrum.org/hardware/feat24.html
A question: What do you think about a drop of oil instead just grease?. Wouldn't it be good?
The grease is plastic safe. If you use oil you must ensure it's not mineral based or it will eat the plastics!
So the regulator will hang out????
I don’t really trust it yet, but there will be another video with audio fixes etc and we will decide!
Man, you don't need to pull the flywheel like that, remove the washer on the spindle from the casette side and you will avoid sepparating the spindle from the flywheel.
that buck regulator is only 1 amps the lm is 2amps
Oh yes, it's super crap as well. I need to revisit this.
When are you going to EAT them Gummy's Mark?
Shhhhhh... they'll hear you!
my old +2 would never load hyperload games
Probably azimuth alignment
Nice work thanks for the video i never realised cpc did belts,the last belts i got for my spectrum were from retrocomputershack .One thing to avoid is the ebay seller selling belt packs under the linna name with a few extras for cleaning and lubricating they are the same quality as the Chinese sets and are useless with tons of wow and flutter .