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TC1/TC2 Capacitance?What value of capacitance should the TC1 and TC2 have in an Issue 2 spectrum? (min and max value). I have looked around, but have been unable to find…
What value of capacitance should the TC1 and TC2 have in an Issue 2 spectrum? (min and max value). I have looked around, but have been unable to find any info about this. -
No colour after changing LM1889NI replaced the faulty LM1889N in my issue 2 spectrum, since I had a very yellow picture, and soldered a socket to put the new LM1889N into, however, …
... the settings for TC1 and TC2 as I dont have any ... -
4116 replaced by 4164 - "Noisy" paper?After I replaced my 4116's with 4164's and hooked them up to +5V, disconnected -5V and +12V, I have what looks like vertical lines in the paper, like…
... do with adjusting TC1 and TC2, the "noise" is unaffected by ... -
Video fault on issue two ZX boardI've trawled the Internet and drawn a few blanks as to where to look to resolve the fault with my issue two board. I'm hoping a few of you knowledgea…
... had a green hue. Adjusting TC2 I managed to get a ... -
No colour - Issue 2 SpectrumThis one is driving me mad - any suggestions appreciated. I have an issue 2 Spectrum with no colour at all. I found the 12v rail was at just over …
... no luck. Replaced capacitors, and TC2 trimmer. Again no difference. I ... -
horizontal shmupsare there any speccy horizontal shmups where you freely move your ship (or whatever) pixel-by-pixel except penetrator? (i?m glad to realize, the lack…
Here are MP3 examples...
[url]http://myweb.tiscali.co.uk/frobush/tc1.mp3[/url]
[url]http://myweb.tiscali.co.uk/frobush/tc2.mp3[/url] -
Spectrum+ - multiple issuesHi all Yesterday I picked up a Spectrum+ (via eBay) to add to my collection. Now, before any of the names I recognise from the last few months of l…
My Issue 2 spectrum"IT'S ALIVE!!!!!" - Dr Frankenstein I got my issue 2 spectrum up and running, colours and all. I borrowed socketed lower ram from my issue 3 that is…
... worked perfectly. Adjusting TC1 and TC2 (which was replaced too), as ...Speccy 48K grey screenGot a issue 2 48K speccy as part of a job lot on ebay, tested it and apart from a duff membrane it appears to be working. However the screen is a gre…
[QUOTE=RetroTechie;681151]That's variable capacitors... :razz:[/QUOTE]
TC2 that bends the frequency of the colour clock is a variable cap... VR1 and VR2 that alter the UV balance are indeed variable resistors :pSpeccy 48K grey screenGot a issue 2 48K speccy as part of a job lot on ebay, tested it and apart from a duff membrane it appears to be working. However the screen is a gre…
... ready... (small insulated preferred for TC2) ;)
Also note that ...Speccy 48K grey screenGot a issue 2 48K speccy as part of a job lot on ebay, tested it and apart from a duff membrane it appears to be working. However the screen is a gre…
... that one here.
TC2 [I]bends[/I] the color ...Spectrum 48k unstable Colours on Composite Video OutputHi, I?ve an Speccy 48k here which has an Composite Video Out Mod (The Video-Modulators power input is cut from the board). On this I get an unstabl…
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OK. A misadjustment of TC2:
[url]ftp://ftp ... voltage, it try to turn TC2 a little bit and voila ...Video fault on issue two ZX boardI've trawled the Internet and drawn a few blanks as to where to look to resolve the fault with my issue two board. I'm hoping a few of you knowledgea…
... the white is green. Adjusting TC2 turned this into the first ...Whites are yellow - 48k Issue 2I have a 48k issue 2 that appears to be working fine. I've replaced all but 2 of the electrolytic caps (mostly because the 2 were not in stock at my…
They're used to finely tune the two crystals on the board, they won't affect colour but finely tuning TC2 (I think) can help minimise the dot crawl effect. Of course, you have to have colour to see that :D
BZX Spectrum issue 2 has only blue tintsRecently I've bought a 16k speccy and ran into some issues with it. Faulty keyboard, broken caps, no stable frequency, faulty lower RAM chip, it bein…
... time you exhaust options, turn TC2 1/8-1/14 turn ...ZX Spectrum issue 2 has only blue tintsRecently I've bought a 16k speccy and ran into some issues with it. Faulty keyboard, broken caps, no stable frequency, faulty lower RAM chip, it bein…
... tuning...
1.
TC2 set
2.
etc....
TC2 move... begin at 2
TC2. That said, I did find ...ZX Spectrum issue 2 has only blue tintsRecently I've bought a 16k speccy and ran into some issues with it. Faulty keyboard, broken caps, no stable frequency, faulty lower RAM chip, it bein…
... position of the vanes of TC2 and move it approximately 30 ... for each adjustment, going over TC2, VR1 and VR2 at least ...Database model ZXDBRecently, I have been trying to figure out how to provide my contribution to whoever takes over WoS archive rework next... So I came up with this: …
16pf Capcitors for C72/C73 issue 3b. Can I use 18pf?Looking at the service manual it states to use a 16pf ceramic disc capacitor in positions C72 and C73 on issue 3b boards. Is this very critical in bo…
... and C73 were trimmer capacitors TC2 and TC1.
If ...
