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ZX Spectrum Test PCB I recently read about one of these (I think it may have been the Retroleum site but I am not sure) and I thought "What a great idea" . As pictured …
... problem . I am tempted to replace coil and see if that fixes ... -
The rescue of a coil.The problem at hand was a known defect transformer from the switching convertor inside a Spectrum. Both windings are not interrupted and not intercon…
... How to identify a defect coil, as nothing special is ... self inductance, a good coil showed some 50 uH ... winding of the defect coil showed just some 5 ... real test. Removing the coil from a working Spectrum ... br /> I did not replace the underlying smaller winding ... -
Replacing coil with other component?The purpose of the coil transformer, from what I gather in the schematics of the issue 2 spectrum, is to create 5V from about 9-10V. Would it not be …
The purpose of the coil transformer, from what I gather ... it not be possible to replace the transformer with a suitable ... -
Spectrum Emulator for Win XP to replace ZX32After years of non-updates, I've decided to finally replace ZX32 as my Speccy emulator of choice for a new one.. What can people recommend thats fre…
... , I've decided to finally replace ZX32 as my Speccy emulator ... -
Spectrum coilFerrite bobbin, two coils wound on top of each other. Bottom coil is 15 turns, top coil is 36 turns. This is the coil found in the 48K spectrum. Ok…
... each other. Bottom coil is 15 turns, top coil is 36 turns ... . This is the coil found in the 48K spectrum ... /> Ok, I want build a coil to the same spec, using ... bobbins? The rest of the coil construction is simple, it's ... -
how to replace the drive belt on a +3hello all i'm so annoyed with myself, I found an excellent web page which led you through step by step on how to replace the drive belt on a +3. I …
... by step on how to replace the drive belt on a ... -
Microdrive using simple coilWhile listening to my iPod using cassette car adapter I came to idea - why not doing the same for the microdrive? Anyone ever tried that? Do you thin…
... ? Do you think a simple coil in the cartridge could do ... 120 kb/s and the coil would produce magnetic impulses to ... -
BC307C to replace ZTX213Can BC307C be used to replace ZTX213? I only found some vague confirmation.
Can BC307C be used to replace ZTX213? I only found some vague confirmation. -
Almost no picture on a toastrack Issue 6UI?d need some help with a toastrack, that hardly shows any picture on both the RF and RGB. It?s totally distorted. I had this before and I remembered…
... transistors are located near the coil, so at a different location ... transistors do I need to replace on a 6U? -
48k - Why Won't it Buzzzz?Hi WOS ;) I bought a load of Spectrum games off eBay and thrown in for good measure was a 48k 1984 Issue 6a circuit board that I was told was for sp…
... a wire on the inductor coil was broken! So I desoldered ... for what to test or replace. Any suggestions?
Thanks ... -
128K Toastrack - Missing coil?Hiya! I recently acquired a fleabay 128K, and before putting power through it, I thought i'd open it up to see if anything looked obviously wrong (e…
... it was missing the massive coil that sits in the circle ... have one? Is it the coil I've read about that ... -
How to replace broken images on Infoseek ?Would it be possible searching infoseek from a search box within the forums just as in the old WoS ? This way you may have the user navigate within …
... /questions/92720/jquery-javascript-to-replace-broken-images
http://stackoverflow ... -
Faulty Issue 1Hi all, thought I'd document my efforts in getting another speccy working. I've never done this before so please bear with me... I recently took a p…
... chip's supply legs, and replace the 7805 with a Traco ... ve not heard the typical coil buzz at any time ... and I get a noisy coil buzz which changes pitch slightly ... 5V with a slightly quieter coil. Plug the TV in ... and I can hear the coil buzz change pitch slightly ... -
Acer Aspire 5920G Graphics card - Replace or have fixed?Wondered if you fellow Spec-chums might be able to help me with getting the most cost-effective fix for a Acer Aspire 5920G laptop I've got my mucky …
... repair service(re-balled and replace chip-set) on these cards ... -
No VCC on the TEA2000 on a +2 greyI'm trying to fix a +2 grey that has no RF and composite out, RGB is good and the machine works just fine. I thought it would be an easy job... repl…
... would be an easy job... replace the zxt650 and ztx213 and ... but no luck. Replaced the coil and both the transistors again ... -
ZX Spectrum 48k issuesHi all! A couple of days ago I bought my first 48k Speccy off ebay (I already own a beautiful QL expanded with QubIDE interface and 640k ram). It was…
... power on (continuity, tr4/tr5, coil, power connector) and the socketed ... before start hunting some good replace ic, I would like to ... -
Issue with TV signal + Inductor Coil (16K Issue 2 Speccy)Hello guys, I just got a 16K Issue 2 Speccy from eBay. It was sold as not working so I knew there would be some work needed before it's working ag…
... to be with the inductor coil which gives me +9V on ... -
48k Issue 6a Very sick indeed.Hi Guys. I have a 48k Issue 6a board that shows a white screen with grey border. The white screen has three black squares spaced equally on the le…
... quite right there? Also, the coil has also been replaced at ... the LM1889N and coil I will remove and replace making good any ... hear any whine from the coil.
My lower RAM ... good the previous LM1889N and coil jobs and report back.
uMIA / Replace TAP Fireflash - Abacus[b]Title:[/b] Fireflash (Variation 1) [b]Year:[/b] 1983 [b]Company:[/b] Abacus [b]Author(s):[/b] Kevin Flynn [b]Type:[/b] Game [b]Message Langua…
... ]Reason for Upload:[/b] To replace TAP file on WOS with ...Sinclair 16k Ram pAck Issue3 schematicsHi guys, I am willing to repair a 16k ram pack for the ZX81 but I cannot find any schematic of the ISSUE 3 ram pack. I could only find a schematic…
... have is probably a bad coil as I saw the magic ... rid of the 4116 and replace them with 8118 ram which ...Ecstasy & AgonyWhile checking out the area around Chennai Central station on Sunday, I came across this crowded narrow road taken up entirely by roadside vendors se…
... you can here the little coil buzzing away, then it's ... IC and just need to replace it.
if that ...Yellow tint and buzzy sound problemI recently bought a 48k and when i plug it in i get the sinclair 1982 screen no problem but it has an odd nicotine stained tint and the sound is just…
... , it's normal for the coil in the power supply section ... it's very loud, replace the coil if adding a drop of ...48k one dead, one dodgyhello everyone. I have 2 48k spectrum +'s (the one with the QL case). Both boards have issue 3B on them near the speaker. The first will power up …
... like its coming from the coil. Is this one finished? I ... machines were mine, I'd replace them. Like I said, the ...Dead Spectrum +Hi all, I've recently dug out my old Spectrum + with the idea of repairing it. When I last looked at it, when I was much younger, I was soldering a …
... +12V. If not, check the coil, ZTX650 AND the ZTX213, zener ... etc. Check the regulator - replace if output is all but ... that.
test and replace the upper RAM. Same procedure ... - remove, socket, replace with known good RAM, test ...toasted soeccysHello, ive jsut bought a pair of speccys on ebay (one 16k issue 2 & a prob 48k issue 3) unfortunaly the genius who sold them tried to see if the wor…
... +12V. If not, check the coil, ZTX650 AND the ZTX213, zener ... etc etc. Check the regulator - replace if output is all but ... that.
test and replace the upper RAM. Same procedure ... - remove, socket, replace with known good RAM, test ...48K Speccy not workingHey, A few months ago (hope it´s not to late) I was loading a game into my speccy and from one moment to another it stopped working! I unplugge…
... the resistance of primary transformer coil (put your multimeter in ohm ... voltage on a secondary transformer coil. There should be 9V or ... have 3A written on it. Replace it with another. If it ...PC Power supply for SpeccyHi all, after 13 years with out playing spectrum games I am eager to play the old games. Thus I got up to the garret checking my old stuff. Two of m…
... just replace TR4. If you have to re-wind the coil, then ...Composite Video output problemHi everyone, I?ve got a problem that?s really bugging me. I have one Spectrum 48K and one Spectrum +3, both with Composite Video output modification…
... uses a bizarre oscillator and coil arrangement to derive +12V and ... )) or try to desolder and replace the chip yourself (assuming it ...Electro Magnetic EngineI think Winston my be qualified to answer this one. What do you know about the magnetic engine. I don't know anything about it, but taking the techn…
... energy to the system to replace that which was lost to ... spring, supplying electricity to a coil inside it or wrapped around ...4116 DRAM for 48KSomeone told me I got faulty RAM in my broken 48K. They should be 150ns, right? What would be a good place to buy them from?
... (various transistors, resistors, capacitors, coil etc) could go. Next I ... />
To do:
* Replace Z80 with CMOS version on ... this Speccy
* Replace ROM with CMOS EPROM (if ... current is lower)
* Replace +5 regulator with switching regulator ...
