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Search Again :: Adv Search 932 results in 0.001s
<1…15161718192021…32>
  • Zx 48k after the ic7805 other problemHi everyone, i am Tiago from Portugal, and i am trying to repair a Zx Spectrum 48K. the machine didn't do anything, no image, no sound, nothing. The…

    ... 1, 8 and 9, (of 4116) then your first problem is ...
    roko roko May 2012 Hardware
  • Lot's of Sinclair parts and sparesI have really a lot spares at home, like: - ULA's - All kinds of RAM chips Many of these parts have already been tested. Most of these parts are pu…

    Prices:

    - Ram chips (4116 / 4164, etc)
    - ZTX651 (replacement ...
    bverstee bverstee May 2012 Sales
  • 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 …

    TR4 getting blown might also indicate something is drawing too much current external to the power supply circuit (faulty 4116 RAM perhaps, or a short somewhere?)
    Winston Winston June 2012 Hardware
  • 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 power supply circuit (faulty 4116 RAM perhaps, or a short ... blew on this spectrum. Then 4116 went. I replaced 7805 and ... 4116, and ran it for a ...
    Johan1973 Johan1973 June 2012 Hardware
  • 4116 replaced with 4164 - ProblemsThanks to Velesoft I have some 4164s, and I have cut the -5V line below R9 where it pass from one side of the PCB to the other. I have cut the +12V a…

    1. You cut -5V and +12V.
    2. Under one (former 4116) socket you connect pins 1,8 and 9.
    3. This will do for RAMs of type 6164.

    I don't have the datasheet at hand but it seems you forgot to connect a relevant pin with +5V?
    roko roko June 2012 Hardware
  • 48k+ CPU SocketThink I've bitten off more than I can chew... After the desoldering my z80 went without incident, no damaged pads, tracks etc. I expected the socket…

    ... /> 1. 7805 Blow
    2. 4116's (lower ram) go bad ...
    Johan1973 Johan1973 June 2012 Hardware
  • 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…

    ... 4164 memory compared to the 4116. Similar kinds of "interference" can ...
    Winston Winston June 2012 Hardware
  • 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…

    ... the memory modules (with original 4116's there is no problem).
    Johan1973 Johan1973 June 2012 Hardware
  • Using an ATX power supply - Spectrum 48kOK... I have an Issue 3 48K model and the DC-DC converter does not work and I can?t make it work. :( There is a MOD to use an ATX power supply on the…

    ... tracks that goes to the 4116 (the -5V and +12V) to ...
    Turrican Turrican June 2012 Hardware
  • Using an ATX power supply - Spectrum 48kOK... I have an Issue 3 48K model and the DC-DC converter does not work and I can?t make it work. :( There is a MOD to use an ATX power supply on the…

    ... tracks that goes to the 4116 (the -5V and +12V) to ...
    Johan1973 Johan1973 June 2012 Hardware
  • 48k+ CPU SocketThink I've bitten off more than I can chew... After the desoldering my z80 went without incident, no damaged pads, tracks etc. I expected the socket…

    You have checked that you have -5V +12V and +5V on the lower ram (4116's) and +5V on the high ram?

    CHeck the spectrum repair guide on this site, is very useful.
    Johan1973 Johan1973 June 2012 Hardware
  • Issue 2 Failed 48k to 128k upgradeI have been trying to upgrade my Issue 2 with the help of Velesoft, using this schematic; [IMG]http://i764.photobucket.com/albums/xx284/arioch1973/4…

    Well then this might be a good time to re-insert [B]known working[/B] RAM chips, for example using 4164 type to replace the 4116's.
    RetroTechie RetroTechie August 2012 Hardware
  • Spectrum30 Show in Cambridge, 08th-09th September 2012Hello Spectrum-fans, after many months of preparation we now proudly present what will be the biggest Spectrum venue of the last 20 years. We manage…

    Hi Tim,

    Will be nice to meet the competition in person. :P I'll be there Saturday, but won't be with games, just a soldering iron lots of 4116 RAM chips probably....
    Spirantho Spirantho August 2012 Sinclair Miscellaneous
  • Spectrum30 Show in Cambridge, 08th-09th September 2012Hello Spectrum-fans, after many months of preparation we now proudly present what will be the biggest Spectrum venue of the last 20 years. We manage…

    ... a soldering iron lots of 4116 RAM chips probably....[/QUOTE]
    RoCkRaBiLiA RoCkRaBiLiA August 2012 Sinclair Miscellaneous
  • Spectrum 128 toaster and divide incompatibility problems with some demos and games.Okay so I got this thing now. It?s my first Spectrum ever. [img]http://img836.imageshack.us/img836/2016/speccyl.jpg[/img] [url]http://img824.image…

    ... be even less reliable than 4116...yet another 4164 has developed ...
    Winston Winston August 2012 Sinclair Miscellaneous
  • Spectrum 128 toaster and divide incompatibility problems with some demos and games.Okay so I got this thing now. It?s my first Spectrum ever. [img]http://img836.imageshack.us/img836/2016/speccyl.jpg[/img] [url]http://img824.image…

    ... be even less reliable than 4116...yet another 4164 has developed ...
    ingo ingo August 2012 Sinclair Miscellaneous
  • Zx 48k after the ic7805 other problemHi everyone, i am Tiago from Portugal, and i am trying to repair a Zx Spectrum 48K. the machine didn't do anything, no image, no sound, nothing. The…

    ... one or more of the 4116 memory modules going bad.
    Johan1973 Johan1973 August 2012 Hardware
  • 16k Issue 2 board and DivIDE load errorsI today got an Issue 2 16k board (thank you PMSR) that i added the logic and ram on to get a 48k machine. However, I am unable to load software from …

    ... . This machine will keep its 4116 memory modules and be kept ...
    Johan1973 Johan1973 August 2012 Hardware
  • Replacing ZTX650 with BD139Today I blew up one of the GALs on one of my DivIDEs while testing on my Toastrack. Shorted M1 with 12V and the 12V circuit broke. I had to replace T…

    ... go, and so does the 4116 memory modules for lower ram ...
    Johan1973 Johan1973 September 2012 Hardware
  • Edge connector breakout board/level translator boardFor a new project I'm thinking of working on (gah, too many projects...) I'm going to be making a new edge connector breakout board. Basically what …

    ... had the z80, 74LS and 4116 interfaced directly to the CPLD ...
    csmith csmith September 2012 Hardware
  • Diagnosing a strange software fault in a 48kHi, A friend gave me a 48k, which I am very keen to restore. The spectrum 48k was my first computer over 20 years ago and I owe my ability to code t…

    ... , place to check is on 4116 RAM IC's in lower ...
    RetroTechie RetroTechie October 2012 Hardware
  • Semi-Dead Spectrum - Help RequestedI have finally got my hands on my two old Spectrums - neither of which work, but ideally I hope to get both of them working again. Spectrum number o…

    Definitely replace all the electrolytic capacitors. A fault in some of them could destroy the lower RAM 4116 ICs and that'd probably be worse than the problem you've got now.
    Zorn Zorn October 2012 Hardware
  • Lower Memory - Why Multiple Voltages?Having spent much of the weekend working on getting my old Spectrum working, my Dad (who is visiting) and I were chatting about the schematic. Given…

    ... Sinclair already had supplies of 4116 chips, very common in some ...
    mcleod_ideafix mcleod_ideafix October 2012 Hardware
  • Lower Memory - Why Multiple Voltages?Having spent much of the weekend working on getting my old Spectrum working, my Dad (who is visiting) and I were chatting about the schematic. Given…

    4116 chips were the most cost ...
    1024MAK 1024MAK October 2012 Hardware
  • Lower Memory - Why Multiple Voltages?Having spent much of the weekend working on getting my old Spectrum working, my Dad (who is visiting) and I were chatting about the schematic. Given…

    ... price point). I imagine the 4116 chips were older because they ...
    Spirantho Spirantho October 2012 Hardware
  • Semi-Dead Spectrum - Help RequestedI have finally got my hands on my two old Spectrums - neither of which work, but ideally I hope to get both of them working again. Spectrum number o…

    ... -5 and +12V on the 4116 RAM bank.
    Falco-F8L Falco-F8L October 2012 Hardware
  • Pentagon RAM memoryDoes anybody know or have reference to technical docs, how no contention on RAM access is achieved in Pentagon 128K clone ? Looking at schematics it …

    ... not all ZXes have 150ns 4116 chips. The trick has to ...
    kpuchatek kpuchatek October 2012 Hardware
  • Looking for Floppy drive, not really ZX relatedI know this is ZX hardware forum, but I am just asking if someone knows some store online that has floppy drives, pc floppy drives available still? T…

    Yes, I want it. I have been meaning to build an external drive :)
    How much do you want for it? Do you take trade? I have a bunch of chips for ZX if you are interested, 4164 ram, 4116 ram, etc.
    Johan1973 Johan1973 November 2012 Hardware
  • My 48K Speccy has died.Hi fellow WoSer's! Wondering if you could help me with my rubber key 48k Spectrum, which died on me this afternoon. It is one I prevoiusly fixed up j…

    ... (obviously you'll need extra 4116 chips at this stage!)
    Winston Winston November 2012 Hardware
  • ZX Spectrum 48K help and Hello :)Hello out there I am a long time admirer of the ZX Spectrum range of computers my first go at one was in the early 1980s with my dads ZX 80 now its …

    ... supplies the odd voltages the 4116 memory needs is not working ...
    Winston Winston January 2013 Hardware
<1…15161718192021…32>

Latest Posts

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HitBox

Word Docs Hits
4116 933 1.4K

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  • 4116-15NL vs 4116-20NLProbably this has been asked before but I am not finding the answer..<br /> <br /> Can anyone explain the difference between the 15NL and 20NL chips,…
  • Wanted 10 - 4116 Ram ChipsHi<br /> Can any one help I am trying to get hold of 10 4116 RAM chips for a 48K Spectrum. Does any one know who might stock them. I can get a minim…
  • 4116 and 4164 chipsI've just found the following supplier for 4116 and 4164 RAM chips.<br /> about $0.80 each.. not bad.<br /> <br /> [url]http://www.jameco.com/[/url]<…
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