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Help me fix my grail ZX 128k SpectrumHi all, Ok today my grail toaster rack ZX spectrum 128k turned up. I finally found one and for a reasonable price. I powered it up and..... Nothing …
... lead connected to the 7805 regulator pin 1 (the input)?
regulator pin 3 (the +5V output ... -
Help me fix my grail ZX 128k SpectrumHi all, Ok today my grail toaster rack ZX spectrum 128k turned up. I finally found one and for a reasonable price. I powered it up and..... Nothing …
Help me fix my grail ZX 128k SpectrumHi all, Ok today my grail toaster rack ZX spectrum 128k turned up. I finally found one and for a reasonable price. I powered it up and..... Nothing …
Use the 20V DC voltage range on the top left of the selection switch.
Then test pin 1 and pin 3 of the regulator again...Help me fix my grail ZX 128k SpectrumHi all, Ok today my grail toaster rack ZX spectrum 128k turned up. I finally found one and for a reasonable price. I powered it up and..... Nothing …
... safe to call this a regulator failure so :)
... /ts7805cz-1a-positive-fixed-voltage-regulator-to220-case-ql31j"]here's ... between the heatsink and the regulator when you're fitting the ... replace the connector to the regulator the right way round when ...Help me fix my grail ZX 128k SpectrumHi all, Ok today my grail toaster rack ZX spectrum 128k turned up. I finally found one and for a reasonable price. I powered it up and..... Nothing …
After removing the old 7805 regulator, clean the area on the ... heatsink where the regulator was fitted, so there are ... prevents the metal of the regulator from touching the metal heatsink ... . In order for the 7805 regulator to work correctly, it has ...Help me fix my grail ZX 128k SpectrumHi all, Ok today my grail toaster rack ZX spectrum 128k turned up. I finally found one and for a reasonable price. I powered it up and..... Nothing …
... to maplins, asked for the regulator, got a few screwed up ...Toastrack refurbishmentYesterday I opened a drawer in my old desk and discovered 2 complete toastrack 128s and a board only for the same. As I already have a fully working…
... didn't use a 1A regulator. :smile:[/QUOTE]
Me ...ZX Spectrum 48K AV IssueOK so I dugout my old 48K Speccy today and decided to AV mod it. I did the mod (pretty easy) but the picture I am getting is this. [url=http://posti…
... 1 of the 7805 voltage regulator to test if the "+9V ... tab of the 7805 voltage regulator as shown by the "0V ...ZX Spectrum 48K AV IssueOK so I dugout my old 48K Speccy today and decided to AV mod it. I did the mod (pretty easy) but the picture I am getting is this. [url=http://posti…
... black lead to 0V (the regulator tab or the heatsink will ...48k PSU Alternatives & DivIDE v DivMMCHey folks, The 48k Speccy I got rather recently is missing it's power supply (though, I know it's working from testing it with the power supply from…
... reverse voltage and the voltage regulator will just pop if you ...48k repairJust had an Issue 2 speccy in with a couple of faults, first thing I noticed was C28, it was there, just no solder, literally just moving about! Sol…
... correctly.
If the regulator and the other electrolytics were ...Burned finger temp on rubber 48k heatsink normal?Ok so i opened it up because a few keys started to act up and i noticed that after burning my hand the heatsink was that hot i could actually smell t…
... /> Replacing the 7805 regulator with a switching regulator will completely cure the ...Burned finger temp on rubber 48k heatsink normal?Ok so i opened it up because a few keys started to act up and i noticed that after burning my hand the heatsink was that hot i could actually smell t…
... ) 620mA
- with switch mode regulator -220mA (400mA)
- with Lower ...ZX Spectrum 48K Issue 3, loss of -5V rail.Hi all, I've googled this problem and poured over the electrical diagrams for the circuitry concerning the power supplies and I believe I know what …
... has the switch mode XP regulator replacement mentioned in the other ...Powering a Spectrum with 5v?I live in the States, but I'm originally from England. My original Spectrum is still at my mum's house in the UK, and I was thinking of asking her t…
... simple as bypassing the 7805 regulator. It's not something I ...Powering a Spectrum with 5v?I live in the States, but I'm originally from England. My original Spectrum is still at my mum's house in the UK, and I was thinking of asking her t…
... 5v output from the main regulator the first stage of the ...Powering a Spectrum with 5v?I live in the States, but I'm originally from England. My original Spectrum is still at my mum's house in the UK, and I was thinking of asking her t…
... 5v output from the main regulator the first stage of the ...Powering a Spectrum with 5v?I live in the States, but I'm originally from England. My original Spectrum is still at my mum's house in the UK, and I was thinking of asking her t…
... a modern replacement for the regulator that throws off less heat ...ZX Spectrum 48K Issue 3, loss of -5V rail.Hi all, I've googled this problem and poured over the electrical diagrams for the circuitry concerning the power supplies and I believe I know what …
... apart from the 7805 voltage regulator (that provides the +5V), it ...The ULA6C001E-5...Hi everybody, I have been continuing my Quest for the Holy ULA, and have today taken delivery of a ULA6C001E-5. Now, the -6 was used in Issue 3 boar…
... a new position for the regulator and shape of heatsink.
regulator and the heatsink shape. Issue ...Burned finger temp on rubber 48k heatsink normal?Ok so i opened it up because a few keys started to act up and i noticed that after burning my hand the heatsink was that hot i could actually smell t…
... ripple on it. The voltage regulator
inside the Spectrum smoothes ... this mean that the voltage regulator has another purpose, besides bringing ... instead of a 'true' voltage regulator?Burned finger temp on rubber 48k heatsink normal?Ok so i opened it up because a few keys started to act up and i noticed that after burning my hand the heatsink was that hot i could actually smell t…
... ripple on it. The voltage regulator
inside the Spectrum ... this mean that the voltage regulator has another purpose, besides ... instead of a 'true' voltage regulator?[/QUOTE]
Both the ... battery.
The regulator has a very stable voltage ...Youtube vids of US guy converting speccy into handheldDidn't see it posted here but thought it was a pretty interesting project. Part 1 and 2 here, more to follow. [youtube]6GcwcyL9LgM[/youtube] [you…
... ], [URL="http://uk.farnell.com/murata-power-solutions/cme0512sc/dc-dc ...ZX81 + 16k RAM Pack + Original PSU... What's it worth?Hey guys Got my ZX81 this morning its in excellent condition.. [IMG]http://s30.postimg.org/iwetzxku9/IMG_20140818_142443.jpg[/IMG] However, my T…
... . I get 10V at the regulator and 5 at the chips ...ZX81 + 16k RAM Pack + Original PSU... What's it worth?Hey guys Got my ZX81 this morning its in excellent condition.. [IMG]http://s30.postimg.org/iwetzxku9/IMG_20140818_142443.jpg[/IMG] However, my T…
... minutes when measured at the regulator.
So I made ...ZX81 + 16k RAM Pack + Original PSU... What's it worth?Hey guys Got my ZX81 this morning its in excellent condition.. [IMG]http://s30.postimg.org/iwetzxku9/IMG_20140818_142443.jpg[/IMG] However, my T…
... getting 10.5V at the regulator.
One ZX81 now ... RF case, add a switching regulator and internal 16K memory.
regulator and ZX8 module (or get ...ZX81 + 16k RAM Pack + Original PSU... What's it worth?Hey guys Got my ZX81 this morning its in excellent condition.. [IMG]http://s30.postimg.org/iwetzxku9/IMG_20140818_142443.jpg[/IMG] However, my T…
... last and maybe upgrade with regulator and ZX8 module (or get ...Spectrum & ZX81 PSU Strange VoltagesHi all I've just refurbished my ZX spectrum PSU after i accidently broke one of the wires i soldered the joints to the PCB nicely and all seems to b…
... dissipated by the 7805 voltage regulator on the ZX81/Spectrum board ...
