terribly fuzzy and black and white video..
4 messages · 2006-02-22 → 2006-02-23 · Yahoo Group era · View archive on archive.org
Participants: Stephen Wenzler, oralm2, M. Emrah Oral
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. Re: [ts2068] terribly fuzzy and black and white video..
Stephen Wenzler · Wed, 22 Feb 2006 19:26
Hey, you can correct this problem, open up the computer and there is
three pots on the main board near the ULA chip and use non-conductive
screwdriver, tweak the pots, I suggests you run a program that generates
color bars test also fine tune the trim pot (the crystal oscillator) to
set to proper frequency as specified in the technical manual. I've done
it to correct a minor dis-tune.
oralm2 wrote:
> So I bought a 2068 on ebay and it works good except the video
> (compsite video, not RF) is very fuzzy, and in black and white.. I
> tried the RF output too and it is the same.. and I tried 3 different
> TVs.. any suggestions ?? All colors appear as shades of gray!
>
>
>
>
>
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2. terribly fuzzy and black and white video..
oralm2 · Thu, 23 Feb 2006 00:17
So I bought a 2068 on ebay and it works good except the video
(compsite video, not RF) is very fuzzy, and in black and white.. I
tried the RF output too and it is the same.. and I tried 3 different
TVs.. any suggestions ?? All colors appear as shades of gray!
3. Re: [ts2068] terribly fuzzy and black and white video..
M. Emrah Oral · Thu, 23 Feb 2006 09:43
That is what I was thinking of doing but this is the second timex 2068 I have bought in 3 months and the first one also had the exact same problem. So apparently this is a common problem. Do you know what may be causing it ? I have tried replacing every filter capacitor in the old one, and it slightly helped the colors but the fuzzy, noisy image did not improve a single bit. Hmmm... What is it that time is doing to those machines !?? This one, I was told, spent the last 20 years sitting in a box in an attic.
Stephen Wenzler <[email]> wrote: Hey, you can correct this problem, open up the computer and there is three pots on the main board near the ULA chip and use non-conductive screwdriver, tweak the pots, I suggests you run a program that generates color bars test also fine tune the trim pot (the crystal oscillator) to set to proper frequency as specified in the technical manual. I've done it to correct a minor dis-tune.
oralm2 wrote:
So I bought a 2068 on ebay and it works good except the video
(compsite video, not RF) is very fuzzy, and in black and white.. I
tried the RF output too and it is the same.. and I tried 3 different
TVs.. any suggestions ?? All colors appear as shades of gray!
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4. Re: [ts2068] terribly fuzzy and black and white video..
Stephen Wenzler · Thu, 23 Feb 2006 13:43
Also another thing, you may have to peform some renovation of the RF
modulator and tune-up to bring the unit to the specs as outlined in the
technical manual. in most cases, the caps and resistors may need to be
checked for values that may have drifted out of it's tolance. There is
many factors.
Good luck in fixing the issues :)
M. Emrah Oral wrote:
> That is what I was thinking of doing but this is the second timex 2068
> I have bought in 3 months and the first one also had the exact same
> problem. So apparently this is a common problem. Do you know what may
> be causing it ? I have tried replacing every filter capacitor in the
> old one, and it slightly helped the colors but the fuzzy, noisy image
> did not improve a single bit. Hmmm... What is it that time is doing to
> those machines !?? This one, I was told, spent the last 20 years
> sitting in a box in an attic.
>
> */Stephen Wenzler <[email]>/* wrote:
>
> Hey, you can correct this problem, open up the computer and there
> is three pots on the main board near the ULA chip and use
> non-conductive screwdriver, tweak the pots, I suggests you run a
> program that generates color bars test also fine tune the trim pot
> (the crystal oscillator) to set to proper frequency as specified
> in the technical manual. I've done it to correct a minor dis-tune.
>
>
> oralm2 wrote:
>
>> So I bought a 2068 on ebay and it works good except the video
>> (compsite video, not RF) is very fuzzy, and in black and white.. I
>> tried the RF output too and it is the same.. and I tried 3 different
>> TVs.. any suggestions ?? All colors appear as shades of gray!
>>
>>
>>
>
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Video upgrades (composite, RGB, HDMI) · Repair & restoration