Lardo buys another zeddy

ZX80 / ZX81 hardware and software offered for sale or swapping
Lardo Boffin
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Joined: Sat Nov 26, 2016 2:42 am

Re: Lardo buys another zeddy

Post by Lardo Boffin »

A mixed bag! The RAM pack works, the zeddy just gives a white screen and the PSU rattles a lot!

F8D41333-F9F5-42E7-890F-0F294CB395DD.jpeg

Edit - the ULA was dead. :roll:
Last edited by Lardo Boffin on Tue Feb 07, 2023 9:08 pm, edited 1 time in total.
ZX80
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
Tatung 81 + Wespi
TS 1500 & 2000
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Lardo Boffin
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Re: Lardo buys another zeddy

Post by Lardo Boffin »

And a nice working postal box issue one.

4E6F17E1-CA33-46ED-A85A-E70495F55643.jpeg
ZX80
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
Tatung 81 + Wespi
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
Lardo Boffin
Posts: 2160
Joined: Sat Nov 26, 2016 2:42 am

Re: Lardo buys another zeddy

Post by Lardo Boffin »

Thanks to these two and a combination of postal strikes and customs (delaying a shipment of bits from Ginger Electronics) I now have five zeddies in the backlog!

Which means I need more parts from Ginger Electronics! Argh.
ZX80
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
Tatung 81 + Wespi
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
Moggy
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Re: Lardo buys another zeddy

Post by Moggy »

Lardo Boffin wrote: Mon Jan 09, 2023 8:19 pm Thanks to these two and a combination of postal strikes and customs (delaying a shipment of bits from Ginger Electronics) I now have five zeddies in the backlog!

Which means I need more parts from Ginger Electronics! Argh.
Moggy quickly puts in order to Karl for a pallet of klikkys and video boards so as to thwart the evil zeddy lord! :lol:

Nice zeddies by the way.
Lardo Boffin
Posts: 2160
Joined: Sat Nov 26, 2016 2:42 am

Re: Lardo buys another zeddy

Post by Lardo Boffin »

A nice issue one yellow / beige zeddy with RAM pack and PSU. Not tested the PSU, need to find a plug but the other bits work.

5672E1C1-C89E-40C7-94D5-77309A9AF2EA.jpeg
8AEAC50C-EA1A-426B-A062-0D6BB56970CC.jpeg
ZX80
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
Tatung 81 + Wespi
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
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1024MAK
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Location: Looking forward to summer in Somerset, UK...

Re: Lardo buys another zeddy

Post by 1024MAK »

Lardo Boffin wrote: Mon Jan 09, 2023 8:15 pm A mixed bag! The RAM pack works, the zeddy just gives a white screen and the PSU rattles a lot!
The PSU is likely to have been dropped, and is the type where the transformer is mounted on a SRBP board, but has now broken free… if so, it’s scrap as it’s unlikely to be safe.

Mark
ZX81 Variations
ZX81 Chip Pin-outs
ZX81 Video Transistor Buffer Amp

:!: Standby alert :!:
There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb :!:
Looking forward to summer later in the year.
Lardo Boffin
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Joined: Sat Nov 26, 2016 2:42 am

Re: Lardo buys another zeddy

Post by Lardo Boffin »

Thanks. Off to the recycling centre then. I might keep the case though, its in pretty good condition
ZX80
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
Tatung 81 + Wespi
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
Lardo Boffin
Posts: 2160
Joined: Sat Nov 26, 2016 2:42 am

Re: Lardo buys another zeddy

Post by Lardo Boffin »

1024MAK wrote: Fri Jan 27, 2023 1:33 am
Lardo Boffin wrote: Mon Jan 09, 2023 8:15 pm A mixed bag! The RAM pack works, the zeddy just gives a white screen and the PSU rattles a lot!
The PSU is likely to have been dropped, and is the type where the transformer is mounted on a SRBP board, but has now broken free… if so, it’s scrap as it’s unlikely to be safe.

Mark
I popped the case open to remove the innards but it seems to be ok?

The whole assembly is loose in the case but the transformer is securely attached to the PCB:

A56A678C-8DE9-4CB6-BF6C-8C34DB002C5C.jpeg
64990F12-49C2-4D67-A512-FEB10E679EBC.jpeg
427683F7-677C-47EC-B9FE-A7BB50BBDAB7.jpeg

Could it be that the foam stuff on top is no longer stopping the assembly move around?

I assume it needs to be some sort of heat resistant foam? It would be a shame to dispose of this if otherwise ok. Assuming it works of course! Not actually tried it yet.
ZX80
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
Tatung 81 + Wespi
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
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1024MAK
Posts: 5101
Joined: Mon Sep 26, 2011 10:56 am
Location: Looking forward to summer in Somerset, UK...

Re: Lardo buys another zeddy

Post by 1024MAK »

If the board is okay and the pins (and the plastic former that holds the pins to the transformer) are okay, that’s good.

It could well be the foam pad being missing or otherwise no longer doing it’s job. Also the board should fit snugly down with the plastic pillars of the case going into the holes in the board. Assuming that this version fits that way.

There are at least four different versions made by different companies for Sinclair. Possibly even more.

I’ve not researched foam pads with respect to temperature rating! But yes, it would indeed be good to use something suitable rather than what you can buy in the stationary section of a shop :lol:

Mark
ZX81 Variations
ZX81 Chip Pin-outs
ZX81 Video Transistor Buffer Amp

:!: Standby alert :!:
There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb :!:
Looking forward to summer later in the year.
Lardo Boffin
Posts: 2160
Joined: Sat Nov 26, 2016 2:42 am

Re: Lardo buys another zeddy

Post by Lardo Boffin »

A working nice issue one and 16K Memopak.

A29B6D6B-92BF-4DB2-8833-2EAC20DAA2F0.jpeg

Might be a while before I do anything with this one though as I seem to have run Ginger Electronics out of keyboards… :oops:
ZX80
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
Tatung 81 + Wespi
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
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