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Issue 6A power modificationHi all, Just saw this on an issue 6A that I'm working on. Anyone seen anything like it before or even know what it's supposed to be doing? Faulty …
Hi all,
Just saw this on an issue 6A that I'm working on. Anyone seen anything like it before or even know what it's supposed to be doing? Faulty coil maybe?
[img]http://i.imgur.com/ju3x9sT.jpg[/img]
Thanks -
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 …
... .
Also, would a faulty coil prevent power? Only ask as ... a click from where the coil is on the board and ... -
Issue 6A power modificationHi all, Just saw this on an issue 6A that I'm working on. Anyone seen anything like it before or even know what it's supposed to be doing? Faulty …
... of resistors will overcome a faulty coil (which is actually a transformer ... -
Faulty rubber speccy - advice neededHello all speccy hardware gurus :) Recently I moved to a new flat and after a long time have some space (and time) to dig out my old Speccy hardware…
... that the ULA from the faulty mbo worked fine in the ... 20k, which should suggest a faulty chip.
So, I ... buzzing comes out from the coil. When that buzzing becomes steady ... -
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 ... am my basic electronics knowledge faulty here? -
ZX-81 Ram Pack problemHi! I know this is a ZX Spectrum forum, but I am hoping someone here might be able to help me out... I have posted this to c.s.s. but noone was able…
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Hardware:
The coil and the power supply are ... is still a posibility of faulty RAM somewhere on the lower ... to see if it is faulty or not.
Also ... -
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 ... -
Faulty M1 linesI'm sure this has been discussed before, but using the forum search for the word 'M1' pulled back no hits, which surprised the hell out of me. Anywa…
... /> Anyway - which Z80s had the faulty M1 lines, and what was ... -
Faulty +2 Grey :(Hello everyone... i was trying to fix a +2 grey board the other day, i had it for some time now. It gave a black screen (paper and border) with two …
... in order to test the faulty one's chips.
After ... i came up with one faulty one so i put a ... -
Faulty M1 LineHello, I've got a new DivIDE but it's not working with my Spectrum 48k+. I've got a sneaking suspicion that it's a faulty M1 line. Is there any way …
... suspicion that it's a faulty M1 line. Is there any ... -
issue 6a faultyHi All I got issue 6a pcb from ebay with status faulty pcb had bad voltages when I power up I changed tr4 ztx650 and all voltages got back on ic6 I h…
... pcb from ebay with status faulty
pcb had bad voltages ... -
faulty zxspectrum +hi all i just bought a speccy 48k+ off ebay it worked for like 15 mins now it is stuck on the reset screen. I fear this is something major maybe fau…
... this is something major maybe faulty ram or the ULA. Does ... -
Sinclair ZX 48K rubber keyed faultyI bought a faulty Sinclair ZX 48 K. Power on and the screen shows only 4 vertical white bars. Nothing other happend. I swapped the ULA and it is ok. …
I bought a faulty Sinclair ZX 48 K. Power on and the screen shows only 4 vertical white bars. Nothing other happend. I swapped the ULA and it is ok. PSU is already ok.
Any idea what's wrong?
Micky -
Faulty +2AHi! I have a +2A from a friend which is not working. I recently made a composite video output for it, using a small circuit from Sami Vehaama. When …
... /> I think the ULA is faulty... but it could be memory ... -
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 ... -
Repairing a faulty 48K issue 2.I am investigating one of a pair of non-working issue 2 48K Spectrums that have been sitting in a cupboard untouched for quite a few years. I haven…
... or perhaps a
partially faulty CPU.
Any ideas ... -
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 for ... winding of the defect coil showed just some 5 ... the outside of the coil is cooled at the air ... real test. Removing the coil from a working Spectrum took ... -
Faulty Interface one, IF1Dear all, as I have already mentioned in a different thread my IF1 stopped working for no special reason. I went through the service manual and chec…
... ( on an other Speccy)
- Faulty IF1 do not work on ... -
Faulty +2 advice please :)Hi all , I have a faulty +2 which when powered up gives a black border and 6 black and White stripes , I'm thinking faulty ram ??? Any one have any b…
Hi all , I have a faulty +2 which when powered up gives a black border and 6 black and White stripes , I'm thinking faulty ram ??? Any one have any better ideas :)
CodenameV -
Faulty dk'tronics keyboardSome time ago I bought a Spectrum 48K in a dk'tronics keyboard, along with a built-in Interface 1 and a pair of Microdrives. It's quite the Frankenm…
... just need to desolder the faulty keys, remove them, and hopefully ... -
Faulty French +2 grayA friend of mine has a faulty french +2 grey model. The picture its giving out is this... [URL=http://imageshack.us/photo/my-images/19/post2036357600…
Spectrum zx (faulty) games, joystick, tape playerSpectrum boots up but sticks on copyright screen - told this is a keyboard fault. Otherwise in good condition. All manuals (VGC) leads PSU etc Joys…
... /p/for-sale/sinclair-spectrum-faulty-tape-player-joystick-and-games ...another faulty zx spectrum +2 to fix!!!Hello to all, I'm new here... I have got a faulty +2 (gray) and start to try fix it... I have read the treads of xaris_sm and Pluto63 as background…
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I have got a faulty +2 (gray) and start to ... completely dead (and not only faulty), now I know that it ...Faulty 48K Issue 3 motherboardHi I have a faulty Issue 3 motherboard and would appreciate it if somebody can steer me in the right direction of where to begin with the fault find…
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I have a faulty Issue 3 motherboard and would ...Another faulty Quick Shot 2 JoystickI don't seem to be able to buy one that works, either the stick mechanism is faulty or the trigger fire button is faulty, my latest as just cost me ?…
... , either the stick mechanism is faulty or the trigger fire button ... is faulty, my latest as just cost ... the trigger fire button is faulty and theatticbug described it as ...ZX Spectrum 48k Issue 2 Faulty Ram?Hi, I have a faulty ZX Spectrum Issue 2 motherboard. Looks in very tidy condition. Though I'm getting random columns of blocks and flashing cursors…
Hi, I have a faulty ZX Spectrum Issue 2 motherboard. ...Faulty(?) ZX81 plus ZX8-CCB boardHello, I have an apparently faulty ZX81 with a ZX8-CCB video out board for sale. It was working last time I had it put together, around this time las…
Hello, I have an apparently faulty ZX81 with a ZX8-CCB ...Free Faulty Original Sinclair ZX81 16k Ram expansionI bought this on ebay, was found to be faulty, when plugged in the screen froze and the "K" vanished. Thanks to a forum member I now have a workin…
... ebay, was found to be faulty, when plugged in the screen ...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 ... know the lower RAM is faulty (alternating black & white blocks ...
