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<1234567…34>
  • ZX spectrum 128K + 2 (Grey one :)Hi all, I'm trying to revive a dead ZX 128K +2 (the grey one). The regulator was damaged and seemed to be feeding 7.8Volts onto the pcb. Yikes ! I…

    ... /> Still no 12Volts.

    TEA2000 pin 11 = 1.30volts :(

    TR8 ...
    DenisM DenisM August 2013 Hardware
  • +2 Grey video issueSo far ive replaced TR4, TR5 (and correctly orientated them) and seperated the audio from the video, still I have this; [youtube]mZZWOXRs_Zk[/youtube…

    Is the +12V Analog (measured across IC2, TEA2000 pin 11 to ground/0V) okay?

    Can't think of anything else at the moment...

    [I][B]Mark[/B][/I]
    1024MAK 1024MAK February 2014 Hardware
  • 128K Toastrack (Noisy video output)Hello there guys! Need all of yours guides and advices. Some time ago I bought a nice looking 128K from eBay (motherboard v6K) and put it aside for…

    ... or the video output of TEA2000/MC1377. In 99.9% ... new additional measuring points:
    TEA2000 PIN 11
    [img]https://lh3.googleusercontent ... h631-no[/img]
    ULA PIN 13
    [img]https://lh3 ... h631-no[/img]
    ULA PIN 14
    [img]https://lh3 ...
    PheeL PheeL April 2017 Hardware
  • 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…

    ... />
    So, vcc on pin 11 of the tea2000 is absent... replaced the ... vcc on pin11 of the tea2000.

    Voltage on all ... just around 11V on one pin only, zero on the other ...
    gtsamour gtsamour December 2016 Hardware
  • ZTX650 and ZTX213Hi I have one +2 which was completly dead but after confirming 78S05 was faulty I replaced it. Afterwards it powers up but there is no TV or composit…

    ... /> Checking by multimeter on pin 11 of TEA2000 reads 4.80V.
    I ...
    netomc netomc April 2012 Hardware
  • Spectrum 128K: distorted picture with composite to vga converterI'm trying to get my 128K Spectrum (toastrack) to work with a vasmon3 composite to vga converter, but all I get is a distorted image on the VGA monit…

    ... already tried L3 on pin 10 of the TEA2000 with no effect ... without effect.
    Power on pin 11 is about 10,7 volt ... 12 volt signal is about 11.8 volt.

    Picture ...
    Knik Knik April 2012 Hardware
  • help with broken +2 greyHello, the other day I was trying to record sounds from my grey +2 "sound" socket to an old cassette recorder. Suddenly the screen went to a solid…

    ... ok everywhere. However, in pin 11 of TEA2000 the +12v are clean, while ... in pin 14 of IC3 there ... not so worried.

    Pin 6 of the z80 shows ...
    saldali saldali June 2016 Hardware
  • Help with dead Spectrum +2aHello. My Spectrum +2a died some time ago. It was powered on, I looked away and next time I looked at it, screen was black. I have replaced the 4 r…

    ... :
    I measured PIN 6 on TEA2000 (as Fraser told to ... have not dared to unsolder TEA2000 away from the working ... ([url]www.secarica.ro/tea2000.pdf[/url]) it shows ... 's just that the TEA2000 is giving out no info ... have +0V on pin 9, Vcc on pin 11 (I imagine +5V ...
    Spirantho Spirantho July 2005 Sinclair Miscellaneous
  • Dead +2B, help required...It was bought defective on ebay. It came with two faults: a "dead" power supply (it was the fuse) and a faulty main unit. The power supply is now re…

    ... +2A electronic scheme, the pin 11 of the TEA2000 (Vcc) is connected to ... +12v through L3. Between pin 11 and ...
    Zup Zup April 2007 Hardware
  • Spectrum 128k +2a questionOn that model what is the purpose of IC 15 ? it is a hex inverter but I cant understant its purpouse I suspect it is malfunctioning in one of my spec…

    ... inverters ( pins 5-8 and 11-10) are used to make ... can see the clock at pin 10 ( but don't expect ... from ULA to TEA2000 ( pin X1 ) for pin X2 of TEA2000 chip

    Two inverters (pin 1-2 ...
    Jose_Leandro Jose_Leandro November 2009 Hardware
  • 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.
    papa_november papa_november April 2012 Hardware
  • Toastrack trouble[IMG]http://i44.tinypic.com/11lq7id.jpg[/IMG] Sorry about the picture size, cant figure out how to make it smaller! Anyway, the pic says it all, th…

    ... ), the +5V pins are pin 13 and pin 14 (check both).
    Check for +12V on pin 11 on the TEA2000

    TR4 is ...
    1024MAK 1024MAK October 2013 Hardware
  • Toastrack trouble[IMG]http://i44.tinypic.com/11lq7id.jpg[/IMG] Sorry about the picture size, cant figure out how to make it smaller! Anyway, the pic says it all, th…

    Havnt had the time to test everything yet (apart from pin 11 of TEA2000, 1.35v), ive ordered some [URL="http://www.ebay.co.uk/itm/171130092555"]more regulators[/URL] as I may as well replace the original anyways
    Macc Macc October 2013 Hardware
  • Toastrack trouble[IMG]http://i44.tinypic.com/11lq7id.jpg[/IMG] Sorry about the picture size, cant figure out how to make it smaller! Anyway, the pic says it all, th…

    ... .5v output 4.5v, checked pin 11 on the TEA, 1.35v ... .
    1.35V on pin 11 of the TEA2000 is much too low ...
    1024MAK 1024MAK October 2013 Hardware
  • Two more faulty onesCould I get your opinion on these two faults, please? Understanding these two cases would be very beneficial for my ZX education. Thanks! - A Spectr…

    ... checking the voltage at pin 11 of the TEA2000. Not sure what would ...
    balford balford November 2013 Hardware
  • 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…

    I measured the voltage at pin 11 of the TEA2000 and it only reads about 1V. :sad:
    schombi schombi January 2014 Hardware
  • Cooking toastrack... the dreaded smellI powered up my Spectrum 128 (heatsink model) yesterday only to see what looked like an out-of-tune picture on the television. I'm using a scart adap…

    With a multimeter, you can check the +12v line from pin 11 of the TEA2000 chip, using the modulator can as ground.

    Can you clarify though exactly what kind of cable you are using to connect the Spectrum to the TV?

    B
    balford balford January 2015 Hardware
  • Grey +2 - DOA and no power lightTook a punt on a grey +2 at the weekend to be a spare. It was "untested" although so were all my other +2's which are all fine. Tried to power th…

    ... , check the voltage on pin 11 of the TEA2000 IC (should be 12v ...
    balford balford August 2015 Hardware
  • Toaster grey screenIv just fired up my toaster and it has a grey screen. I can still see the menu which still works ok. It looks as if someone has painted the front of …

    ... , check the voltage on pin 11 of the TEA2000 chip, this should be ... generate the +12v rail the TEA2000 needs to produce a colour ...
    balford balford August 2015 Hardware
  • I recapped my 128K toastrack, installed stereo kit and detached audio from video, but...Hello fellow forumers! I'm seeking for help: I've finally decided to change all electrolytic capacitors of my 6U (with all Panasonics 105oC)... Af…

    ... checked for 12v in pin 11 of TEA2000; I got 11.53v, which I ... the video circuity)? In what pin of the RGB socket should ... that ULA is OK... Maybe TEA2000 or transistors?

    Of ... ) to CS input of TEA2000 (pin 16)? I only checked for ...
    geosiou geosiou October 2015 Hardware
  • Composit output on +2 and +3?I recently got hold of a dvd recorder for the purpose of recording speccy gameplay. It turns out that this particular recorder is not compatible wit…

    Pin 6 of the tea2000 is the composite signal it should be about 2volts.
    Mine was giving out 6v

    Pin 11 is power and should roughly be 12v
    Level20 Level20 March 2016 Hardware
  • Original Grey +2 Picture IssuesSo, I have my +2 connected to an old CRT TV, and the Speccy has been working fine. Decided to have a shift around, but once I moved the +2 i've lost…

    Sounds like the internal +12v supply might have failed, if you have a multimeter check the voltage on pin 11 of the TEA2000 (IC2). If it's not reading close to 12v, you'll be looking to change transistors TR8 and TR9.

    B
    balford balford January 2017 Hardware
  • Original Grey +2 Picture IssuesSo, I have my +2 connected to an old CRT TV, and the Speccy has been working fine. Decided to have a shift around, but once I moved the +2 i've lost…

    ... check the voltage on pin 11 of the TEA2000 (IC2). If it's ...
    SimonLCFC SimonLCFC January 2017 Hardware
  • Repair Zx Spectrum +2 Blackhello there, just found a Zx Spectrum +2 Black edition Issue 1 board that doesnt appear anything on the screen, even led dont power on,i have tes…

    The TEA2000 encodes the RGB output from ... . Check continuity between the 5V pin on the PSU socket, and ... the CASSETTE connector, pin 11 of the Z80, pin 28 of the ROMs ... , pin 9 of the RAMs ...
    Peter Mulholland Peter Mulholland February 2017 Hardware
  • nec780 vs z80aHi everyone! Got a 48k issue 2 board with nec780 with a mts2369 at its back.(spider?) Between pin 11 of the cpu and pin 14 of ic 23 theres a resis…

    ... ?)

    Between pin 11 of the cpu and pin 14 of ic ...
    odious odious September 2005 Sinclair Miscellaneous
  • Requesting a little help to identify the purpose of this 'add-on' to my Issue 2Hi everyone First of all it's my first post here so please go easy on me! I'm grateful to be accepted into your fine little club :smile: I probabl…

    ... gate) is connected to pin 13 (input to fourth ... the edge connector
    Pin 5 (input to second ... same line as ENABLE pin on IC4 (SN74LS157N multiplexer ... goes to ULA pin 37 (A15)
    Pin 11 (output from ... fourth NAND gate) goes to ULA pin ...
    cmonkey cmonkey October 2011 Hardware
  • A small thoughtexperiment.Hi. Let's say that i have a 48K Issue 3b spectrum, and i want to be able to disable the top 32K ram from an external interface. This interface would…

    ... pulling CAS (IC23 pin 6) and WRITE (IC23 pin 11) high, using ... a couple of diodes at each pin to ... OR gate between IC23 pin 6 and the CAS ... and also between IC23 pin 11 and the WRITE pins ... call it the enable/disable pin). The ramchips would be ...
    Rorschak Rorschak June 2012 Hardware
  • Damaged S2 IC 26?I'm after more advice, pretty please :) On my S2 board there appears to be a damaged chip, it looks to be IC 26 and is marked as 74LS158PC, it appea…

    ... this. Anyway pin 10 is in pin 11's slot and pin 11 is not ...
    Korinel Korinel September 2014 Hardware
  • Composite video ghost image on ZX Spectrum 128K +2Hi, I have a ghost image on the composite video out on my ZX Spectrum 128K +2 and have run out of ideas of what could be wrong. Does anybody have a…

    ... following
    - 10V on the TEA2000 12V input with no obvious ... /> - the clock input into the TEA2000 looks terrible to my eyes ... test the chromance filter on TEA2000 pin 10. I tried adjusting it ...
    pdj102 pdj102 September 2016 Hardware
  • Another 48k Speccy acting as a 16K model.Hi all, I originally was going to post asking for help to fix the new addition to my family a very nice condition Issue 2 sold on ebay as a 16K model…

    ... , pin 11 was cut off, pin 10 was bent to connect with when Pin 11 ... must go to A14 and Pin 11 on IC23 must go to ... was bent into pin 11's hole.... so why was Pin 11 cut off ... 'd swapped out, bent pin 10 into 11 connected pin 11 to ground.... bet ...
    povvercrazy povvercrazy April 2017 Hardware
<1234567…34>

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