TIMEX TC2048 Schematics

2 messages · 2005-03-08 → 2005-03-09 · Yahoo Group era · View archive on archive.org

Participants: displayhelp, Jarek Adamski

Preserved from the Timex/Sinclair 2068 Yahoo Group (2001–2019), which is no longer online. Text reproduced from the archive.org archive; email addresses masked.

Messages

1. TIMEX TC2048 Schematics

displayhelp · Tue, 08 Mar 2005 09:09

Not long ago, one of my old computers a TC 2048 stopped working.

I've already checked it for the correct power at the IC's pins, 
changed RAM, ROM and Processor but it still not work.

I was wondering if anyone have the schematics for the TC2048 cos i 
can't find them anywhere on the web...

Best Regards,

UltraTech

2. Re: [ts2068] TIMEX TC2048 Schematics

Jarek Adamski · Wed, 9 Mar 2005 11:39

Cytowanie displayhelp <[email]>:

> I was wondering if anyone have the schematics for
> the TC2048 cos i can't find them anywhere on the web...
Me, too. But it is very similar to TC2068, there are
only few diferences (EXROM, cartridge slot, AY & joys,
Kempston Joystick).
 http://8bit.yarek.pl/computer/zx.tc2068/

Check if on Z80CPU CLK input is the clock signal.
I've had one TC2068 with dead 14MHz oscilator.

The hardware should first generate screen frame.
Then. with no ROM inserted vertical lines should
appear, like:
 http://8bit.yarek.pl/computer/zx.tc2068/emptyrom.gif

--
Jarek Adamski

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Timex Computer (European: TC2048/3256) · Repair & restoration