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7805 Regulator HelpI am hoping to replace the 7805 regulator in my issue 3 48K Spectrum soon. Unfortunately I don't know exactly what to buy to replace it with (my fat…
... that work then? cause the regulator still has to waste the ... -
Who can repair a 48K Spectrum?My Spectrum is broken, please see: [url]http://www.worldofspectrum.org/forums/showthread.php?t=29351&highlight=7805+heat+sink&page=2[/url] Does anyb…
Is it the 7805 regulator that you are talking about ... -
Who can repair a 48K Spectrum?My Spectrum is broken, please see: [url]http://www.worldofspectrum.org/forums/showthread.php?t=29351&highlight=7805+heat+sink&page=2[/url] Does anyb…
... ;462059]Is it the 7805 regulator that you are talking about ... -
Who can repair a 48K Spectrum?My Spectrum is broken, please see: [url]http://www.worldofspectrum.org/forums/showthread.php?t=29351&highlight=7805+heat+sink&page=2[/url] Does anyb…
... instabilities, but either a voltage regulator is killed entirely or the ... -
Who can repair a 48K Spectrum?My Spectrum is broken, please see: [url]http://www.worldofspectrum.org/forums/showthread.php?t=29351&highlight=7805+heat+sink&page=2[/url] Does anyb…
... instabilities, but either a voltage regulator is killed entirely or the ... -
ZX48K 128K modHas anyone make this mod to the ZX48K? Does it work? [URL]http://hw.speccy.cz/128krebuild.html[/URL] Micky
... it was a dodgy voltage regulator. The Amstrad machines all use ... -
Spectrum hangs upWhat might be problem when my ZX Spectrum 48K (rubber keys) hangs up after few minutes play? It had memory problems but i changed (or an expert did i…
First thought (I meant to reply earlier) check the voltage regulator still has its heatsink attached correctly. -
Broken ZX Spectrum? :(Hi! I bought a 2nd hand ZX Spectrum half a year ago. It worked perfectly fine when I first tried it. I put it back in its box which it was sent in, …
... for use in a switching regulator. It is a very cheap ... -
Silver speccy on the inside, you know what it is ?I was looking at one of my 48k speccys it has a label underneath with the serial printed on it and signed and dated, there is no permanent serial num…
... a switch (next to +5V regulator) with markings "ch2 - ch3" on ... -
Maximum number of Spectrum devicesHi! What is maximum number of devices i can connect to my rubber key Spectrum? Is there somekind of limit? Now i have Interface 1, Microdrive, Zx p…
... ]
The internal 7805 regulator offers only 1 Ampere (5 ... Ampere or 5 Ampere type regulator, but if you want to ... -
Gauntlet III (missing artist)[URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0001993"]Gauntlet III[/URL] SJS in the middle left. [img]http://www.worldofspectrum.org/show…
... ="http://www.lemon64.com/?game_id=723"]this[/URL] would be (more ... -
Help with broken QLHi, I picked up a QL recently but find that after a while the keyboard stops responding. Any ideas what could be wrong? Thanks
... to just replace the 7805 regulator where the power comes into ... -
zx spectrum +2 troubleshootingHi There I am new here and I need some advise as to where to look for issues on my zx spectrum +2 it was working fine this morning .. then while pl…
... , but still no signal
regulator out voltage = 4.99 volts -
zx spectrum +2 troubleshootingHi There I am new here and I need some advise as to where to look for issues on my zx spectrum +2 it was working fine this morning .. then while pl…
... , but still no signal
regulator out voltage = 4.99 volts ... black? As you named a "regulator", I assume it's a ... -
Help with broken QLHi, I picked up a QL recently but find that after a while the keyboard stops responding. Any ideas what could be wrong? Thanks
OK I replaced the 7805CSP regulator with a 7805CV and the ... -
Maximum number of Spectrum devicesHi! What is maximum number of devices i can connect to my rubber key Spectrum? Is there somekind of limit? Now i have Interface 1, Microdrive, Zx p…
... )
Only internal voltage regulator 7805 i replaced by 3A ... switching regulator. I think, it was not ... -
Opus Discovery 1 problem insideHi folks, when I opened my Opus Discovery 1 I have probably wrecked a regulator that is connected to the mainboard by three cables. Regulator 2 is wi…
... : white , red, yellow.
The regulator is LM317 and the wiring ... the position of the other regulator and the two rectifiers. I ... -
Opus Discovery 1 problem insideHi folks, when I opened my Opus Discovery 1 I have probably wrecked a regulator that is connected to the mainboard by three cables. Regulator 2 is wi…
Hi Roko,
thanks for the fast reply...
So is it a normal, that regulator 2 is connected by three cables and not an improvement by a former owner?
Groetjes naar Nederland vanuit het Sauerland... -
Opus Discovery 1 problem insideHi folks, when I opened my Opus Discovery 1 I have probably wrecked a regulator that is connected to the mainboard by three cables. Regulator 2 is wi…
... it something to do with regulator 2? Maybe I should replace ... -
Opus Discovery 1 problem insideHi folks, when I opened my Opus Discovery 1 I have probably wrecked a regulator that is connected to the mainboard by three cables. Regulator 2 is wi…
... somewhat over-enthousiastic?
Regulator REG2 handles the 5V. Note ... -
Do ULAs die?Thought I'd start this thread as people often think their ULA is dead, when it's actually the RAM or power circuits. Searching the forum in the futur…
... 5v line takes out the regulator this shouldn't harm the ... -
+2 power not working. Need helpHi folks, I'm hoping someone may be able to point out what could be wrong/needs fixing here. One of my +2's had a loose RF modulator. The 5v wire w…
... there is a 5 volt regulator which should the unregulated supply ... -
+2 power not working. Need helpHi folks, I'm hoping someone may be able to point out what could be wrong/needs fixing here. One of my +2's had a loose RF modulator. The 5v wire w…
... supply voltages. Possibly the +5V regulator was killed, but that's ... -
Spectrum +3 doesn't workMy recently ebay purchased +3 arrived today, so I was quite excited to have one again. I plugged it in and all was well, except for a slightly worry…
... only used as a voltage regulator, so any transistor with matching ... -
Spectrum +3 doesn't workMy recently ebay purchased +3 arrived today, so I was quite excited to have one again. I plugged it in and all was well, except for a slightly worry…
... only used as a voltage regulator, so any transistor with matching ... -
opus discovery repair?I just got one today, that isn't working.. I notice there is a schematic on here.. is there any service manual etc? there was a guy in SW London , I…
I had a faulty ROM not long ago.
Also check for cracked solder joints around the regulator/power-supply area inside. -
Timex 2048 documentsHi, I got Timex 2048, seems to work, but no colors on screen :cry:. Neither TV out, nor Composite works. ULA fault ? It seems TC 2048 uses MC 1377 a…
... /> Also can't tell whether regulator says 7805 or 7809... :grin ... -
Timex 2048 documentsHi, I got Timex 2048, seems to work, but no colors on screen :cry:. Neither TV out, nor Composite works. ULA fault ? It seems TC 2048 uses MC 1377 a…
[QUOTE=RetroTechie;489308]Also can't tell whether regulator says 7805 or 7809... :grin:[/QUOTE]
Looks like 7809 to me...;) -
Powerpack melts! +3 survives!I woke up this morning, switched on the sockets, went to the loo 'as you do' and came back into the living room. I heard this clicking sound so I th…
... guess that the 5V linear regulator let out the magic smoke ...
