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Dead 128K heatsinkUnfortunately my 128K heatsink died suddenly and with no apparent reason. I had the Kempston Pro interface connected and when i powered it on the ztx…
... ended up with an extra TEA2000 chip that my local store ... -
ahh..sooo close :) Spec128k+ RGB on LCD monitor helpHello, Was trying out RGB on my 128k+ and a Samsung Syncmaster 204 lcd monitor. Tried this monitor with a Genesis/Megadrive and a SNES and works real…
... hack on the TEA2000 circuit)
The TEA2000 takes the RGB ... -
Grey +2 video output and oddities.I've been experimenting with one of the above that I acquired years ago, but had just been buried at the back of a cupboard. I've connected it up to…
... (from pin 6 of the TEA2000) is soldered wrongfully, read it ... -
Grey +2 video output and oddities.I've been experimenting with one of the above that I acquired years ago, but had just been buried at the back of a cupboard. I've connected it up to…
... (from pin 6 of the TEA2000) is soldered wrongfully, read it ... (applies audio sub-carrier to TEA2000 input) and instead connected this ... -
128K heatsink no color in composite video and bad antenna outputI am currently repairing a ZX Spectrum 128K heatsink model. It gives no colors on composite video output, and very bad antenna output. I opened it a…
[QUOTE=Encarnado;601635]Bad crystal?[/QUOTE]
I have exactly 8.8MHz on XTAL1 and XTAL2 on the TEA2000, so that seems fine.
Forgot to mention. -
128K heatsink no color in composite video and bad antenna outputI am currently repairing a ZX Spectrum 128K heatsink model. It gives no colors on composite video output, and very bad antenna output. I opened it a…
... it's not:
- the TEA2000
- the ULA
- the ... composite video circuit after the TEA2000
- the modulator circuit
128K heatsink no color in composite video and bad antenna outputI am currently repairing a ZX Spectrum 128K heatsink model. It gives no colors on composite video output, and very bad antenna output. I opened it a…
... taken from pin 7 of tea2000 but if you see the ... you stady the datasheet of tea2000, you wll see that from ...128K heatsink no color in composite video and bad antenna outputI am currently repairing a ZX Spectrum 128K heatsink model. It gives no colors on composite video output, and very bad antenna output. I opened it a…
... taken from pin 7 of tea2000 but if you see the ...128K heatsink no color in composite video and bad antenna outputI am currently repairing a ZX Spectrum 128K heatsink model. It gives no colors on composite video output, and very bad antenna output. I opened it a…
... /> I tried:
- replacing the TEA2000
- replacing the ULA
TEA2000 to try the modulator ... from pin 6 of the TEA2000
- checking the frequencies ... on the TEA2000's inputs (8.8 MHz ...128K heatsink no color in composite video and bad antenna outputI am currently repairing a ZX Spectrum 128K heatsink model. It gives no colors on composite video output, and very bad antenna output. I opened it a…
... XTAL1 and XTAL2 on the TEA2000, so that seems fine.[/QUOTE ... already tried replacement video encoder TEA2000.
So another possibility ...128K heatsink no color in composite video and bad antenna outputI am currently repairing a ZX Spectrum 128K heatsink model. It gives no colors on composite video output, and very bad antenna output. I opened it a…
Really you need to have a look with an oscilloscope otherwise you're basically reduced to guesswork.
trigger it with the sync signal and see what signals you have in and out of the TEA2000.ZX Spectrum 128K composite video fixes in 1 documentI just finished my document with video fixes and improvements for all ZX Spectrum 128K models. Download it here: [URL="http://benophetinternet.nl/ho…
... luma in pin of the TEA2000 the modulated audio is disconnected ...Occasional noise over RGB on +2AHi all I have a +2A that is misbehaving at the moment. I'm using the RGB to SCART lead (which incedentally is great on my +3) The problem is, the …
... the composite signal off the tea2000 chip which isn't too ...Spectrum 128k +2 (grey) RGB Port IssueI have a Spectrum 128k +2 grey model which when connected to the TV with a RGB scart lead via RGB port displays the standard menu screen but flickeri…
If you are using an RGB lead the TEA2000 has nothing to do with it as that is only responsible for generating composite video.Issue 3B only sees 16k (and RAMTOP NO GOOD on loading)A ZX+ with issue 3B board that i got recently, does not see anything more than 32768 (sometimes 37267..) on "PRINT PEEK 23732 + PEEK 23733 * 256 (Ent…
... the other hand, the toastrack TEA2000 PAL encoder doesn't offer ...ZX Spectrum 128K composite video fixes in 1 documentI just finished my document with video fixes and improvements for all ZX Spectrum 128K models. Download it here: [URL="http://benophetinternet.nl/ho…
... the second right of the TEA2000?
Not sure, so measure ... to pin 8 of the TEA2000. That's the one.Issue 3B only sees 16k (and RAMTOP NO GOOD on loading)A ZX+ with issue 3B board that i got recently, does not see anything more than 32768 (sometimes 37267..) on "PRINT PEEK 23732 + PEEK 23733 * 256 (Ent…
ZX Spectrum 128K composite video fixes in 1 documentI just finished my document with video fixes and improvements for all ZX Spectrum 128K models. Download it here: [URL="http://benophetinternet.nl/ho…
... the second right of the TEA2000?
Not sure, so measure ... to pin 8 of the TEA2000. That's the one.[/QUOTE ...Getting absolutely no video from a 128+I'm trying to get a friend's toastrack 128 to show video and I'm not having any luck. I'm in the US, so I don't have access to any TVs that can take …
... 's the 12V missing: the TEA2000 needs 12V.
Get ...Getting absolutely no video from a 128+I'm trying to get a friend's toastrack 128 to show video and I'm not having any luck. I'm in the US, so I don't have access to any TVs that can take …
Just checked pin 11 on the TEA2000 and I'm seeing less than 2 volts, so I'm guessing those two transistors are at fault.Spectrum +2 gray strong noise at TV sound outputWhat could be the reason of strong sound noise at TV channel on gray +2? In the beginning this speccy was dead, it had faulty 78S05 and ZTX650. Added…
... see that COVO output from TEA2000 (that's just composite signal ...Spectrum +2 gray strong noise at TV sound outputWhat could be the reason of strong sound noise at TV channel on gray +2? In the beginning this speccy was dead, it had faulty 78S05 and ZTX650. Added…
... /> Then modulated signal goes to TEA2000. Here i am lost and ... , that sound goes to TEA2000. And TEA2000 is the second suspect.
TEA2000 and check that everythig there ... then you need a new TEA2000 (most likely) or MC1376 ...128K Toastrack colour smearHi guys! I got this 128K toastrack and connected it to my TV composite video input extracting the video signal directly from PIN 1 out of the rear R…
... the 128k models use a TEA2000 chip to generate the PAL ...Wriggler / WrigglerNLHi people, On my travels yesterday, I came across a confusing tape. It's Wriggler by Romantic Robot, as found here. The weird thing is that it doesn…
... luck have perfect 12v in tea2000 :) i will try this 2 ...The video circuitryDo you know which electronic parts make up the video circuitry in Spectrum 128k +2?
ULA create the video part, and TEA2000 convert RGB to Composite if you use composite output.The video circuitryDo you know which electronic parts make up the video circuitry in Spectrum 128k +2?
[QUOTE=Johan1973;643258]ULA create the video part, and TEA2000 convert RGB to Composite if you use composite output.[/QUOTE]
Thank you for answering me. Do you know which chip is ULA?Spectrum 128K (toast Rack) displaying white as yellow issueHi, I have a chance to buy a Spectrum 128 (toast rack) model which the owner says is working fine except that when it is hooked up to a Amstrad Moni…
... the video circuitry around the TEA2000. That would make this message ...+2 (Grey) S-video?I have a pretty good Composite/S-video to VGA adapter that does a nice work of running my retro machines on an old LCD screen. However, it looks best…
... how much I study the TEA2000 datasheet, I can not see ... luminance signal emerges from the TEA2000 at pin 7. Instead of ...
