f

#### Broken 2nd hand 'Sinclair Spectrum 128K' (probably the UK ver.)

Hi NG

I have bought a seemingly broken 128K Speccy.

The calculator makes some (some dozen) vertical bars, from the bottom
up to the top, in GREEN, BRIGHT GREEN, MAGENTA and BLACK. Bright Green
and Green bars are FLASHING with/to Magenta.

Opened up, chips are getting warm and hot (CPU, ROM, ULA, etc.).
PCF1603P (ZX8401) kept cool??

Best regards,

Daniel Mandic

P.S.: Spending holiday the next weeks. Best Wishes to all. Long live
the Sinclair and Computers.

 0
8/24/2006 3:52:30 PM
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I assume this is with nothing plugged in the back?

I think the ULA you mention does run cool, so I doubt if that is any
indication.

Are any of the chips socketted? Do you have the right power supply, IE not a
48k one? Is the regulator plug  OK?

After that I'm afraid it could be almost anything.

Brian

--
Brian Gaff....Note, this account does not accept Bcc: email.
graphics are great, but the blind can't hear them
Email: briang1@blueyonder.co.uk
______________________________________________________________________________________________________________

"Daniel Mandic" <daniel_mandic@ping.at> wrote in message
news:eckhvt$1lo$1@paperboy.si.eunet.at...
> Hi NG
>
>
>
> I have bought a seemingly broken 128K Speccy.
>
> The calculator makes some (some dozen) vertical bars, from the bottom
> up to the top, in GREEN, BRIGHT GREEN, MAGENTA and BLACK. Bright Green
> and Green bars are FLASHING with/to Magenta.
>
> Opened up, chips are getting warm and hot (CPU, ROM, ULA, etc.).
> PCF1603P (ZX8401) kept cool??
>
>
>
>
> Best regards,
>
> Daniel Mandic
>
>
>
> P.S.: Spending holiday the next weeks. Best Wishes to all. Long live
> the Sinclair and Computers.


 0
Briang1 (1214)
8/24/2006 5:16:24 PM
Odakle ste?

Ukoliko ste iz Beograda (ili Vas ne mrzi da do istog dodjete) mogu Vam
dati izpravan ULA chip... mada ja ne verujem da je u tome problem...
mislim da Vam je jedan od memorisjkih chipova crkao... mozda i tu mogu
da Vam pomognem...

..r. '_'

Daniel Mandic wrote:
> Hi NG
>
>
>
> I have bought a seemingly broken 128K Speccy.
>
> The calculator makes some (some dozen) vertical bars, from the bottom
> up to the top, in GREEN, BRIGHT GREEN, MAGENTA and BLACK. Bright Green
> and Green bars are FLASHING with/to Magenta.
>
> Opened up, chips are getting warm and hot (CPU, ROM, ULA, etc.).
> PCF1603P (ZX8401) kept cool??
>
>
>
>
> Best regards,
>
> Daniel Mandic
>
>
>
> P.S.: Spending holiday the next weeks. Best Wishes to all. Long live
> the Sinclair and Computers.


 0
8/27/2006 2:01:13 AM
..r. '_' escribi�:
> Odakle ste?
>
> Ukoliko ste iz Beograda (ili Vas ne mrzi da do istog dodjete) mogu Vam
> dati izpravan ULA chip... mada ja ne verujem da je u tome problem...
> mislim da Vam je jedan od memorisjkih chipova crkao... mozda i tu mogu
> da Vam pomognem...

I think his explanations are very accurate. It's all perfecly clear :D

Seriously... I haven't understand a single word, well... apart from "ULA",
"chip" and "problem". Could you post it again in English?

 0
8/27/2006 2:35:40 AM
McLeod / IdeaFix wrote:

> I think his explanations are very accurate. It's all perfecly clear :D
>
> Seriously... I haven't understand a single word, well... apart from "ULA",
> "chip" and "problem". Could you post it again in English?

Lol... sorry!

I've just asked the guy if he is maybe form Belgrade (Serbia); and told
him that I might help with ULA or memory chips! that's all... ;)


 0
8/27/2006 11:28:20 PM
".r. '_'" <ranko.vukcevic@gmail.com> nap�sal

> I've just asked the guy if he is maybe form Belgrade (Serbia); and told
> him that I might help with ULA or memory chips! that's all... ;)

Hi, I am from Slovakia and I particulary understood what have you written in
your native language, but I musted to think up what some of your words mean.

B


 0
bohusk (1173)
8/28/2006 3:51:16 PM
Brian Gaff wrote:

> I assume this is with nothing plugged in the back?

Hi Brian!

Yes.

> I think the ULA you mention does run cool, so I doubt if that is any
> indication.

No, I am quite sure. The ULA is the hottest chip and socketed, so far I
remember (looks nice! ... but the Z80 for example, is directly soldered
to the Mainboard and is getting hot, too.)

> Are any of the chips socketted? Do you have the right power supply,
> IE not a 48k one? Is the regulator plug  OK?

The 7805 is inserted well, but it gets mildly warm, though.

> After that I'm afraid it could be almost anything.
>
> Brian

Can you tell me please, what kind of power-supply would I need?

The 128K schematic shows a 9V, inside minus and outside plus, input. I
thought the Speccy 48K Adaptor should deliver power to the 128K as well
as it would do for a Speccy 48K.

Too low max. output current?

Best Regards,

Daniel Mandic

 0
8/31/2006 1:14:31 AM
Zdravo!

Ovaj Chip sta ostane hladan, je taj ZX8401 Multipleks Chip, sta
vjerovatno obradi te 128K i 48K Modusi, Bank switching itd.

Pozdrav,

Daniel Mandic

 0
8/31/2006 1:14:32 AM

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