Search found 8 matches

by daverobzippy
Wed Aug 01, 2018 6:16 pm
Forum: Hardware
Topic: Video issue over rf. Changes with reset
Replies: 7
Views: 3475

Re: Video issue over rf. Changes with reset

The ones I have been dealt with have been socketed. That doesn't mean they were from the factory, hopefully the issue is this IC and the RGB output will be fine.
by daverobzippy
Wed Aug 01, 2018 8:45 am
Forum: Hardware
Topic: Video issue over rf. Changes with reset
Replies: 7
Views: 3475

Re: Video issue over rf. Changes with reset

Indeed. It is the fact that the picture can be excellent and then not so. This isn't down to the television it is down to the machine. Hopefully it is the 1377 that is at fault. I'm assuming that by using an RGB cable the 1377 will not come into play so a stable picture constantly at that point woul...
by daverobzippy
Sat Jul 28, 2018 9:54 am
Forum: Hardware
Topic: Video issue over rf. Changes with reset
Replies: 7
Views: 3475

Re: Video issue over rf. Changes with reset

No it is the same if I intercept the composite signal before it reaches the modulator.
It is always one way or the other, no inbetween, either a really great picture or a slightly not so great picture.
Of course using an RGB cable will hopefully help pinpoint where the issue is.
by daverobzippy
Thu Jul 26, 2018 6:12 pm
Forum: Hardware
Topic: Video issue over rf. Changes with reset
Replies: 7
Views: 3475

Video issue over rf. Changes with reset

So the QL is up and running. I have the picture over RF, however sometimes the picture will be nice and clear and other times it wont be. I know that the next step is to order an RGB cable and try that but has anyone ever come across anything similiar. It has been re-capped and was doing this before...
by daverobzippy
Thu Jul 26, 2018 6:06 pm
Forum: Hardware
Topic: QL red and green vertical stripes at startup
Replies: 5
Views: 2570

Re: QL red and green vertical stripes at startup

Sorry for not replying to this earlier.
There is nothing worse than searching a forum for a solution to a problem only to find the op never put the answer.
It was the 2 ls257 multiplexor chips that were toast.
With them replaced it now fires up fine every time.
Thanks for the help in this.
by daverobzippy
Thu May 24, 2018 11:05 am
Forum: Hardware
Topic: QL red and green vertical stripes at startup
Replies: 5
Views: 2570

Re: QL red and green vertical stripes at startup

Thankyou for that. Regarding mdv1 spinning up, if I turn the power off and on within a few seconds it doesn't spin up, it has to be left for at least 10 seconds power off. I have checked for bent pins and also checked that the correct voltages are present. I can't see anything that would pose a prob...
by daverobzippy
Thu May 24, 2018 9:56 am
Forum: The Welcome Area
Topic: Hello from Lancashire
Replies: 5
Views: 4650

Hello from Lancashire

Hey guys, just signed up.
Been after a QL for a while, finally got one so excited to see what the fuss is about.
Been messing with Spectrum's since I got my first 48+ for Xmas many years ago.
Going to have a browse of the forum to gleen some information.
Happy days..
by daverobzippy
Thu May 24, 2018 9:54 am
Forum: Hardware
Topic: QL red and green vertical stripes at startup
Replies: 5
Views: 2570

QL red and green vertical stripes at startup

Hey guys. I finally found myself a QL but it doesn't want to fire up. When powered on it produces vertical green and red thick bars with random white clocks and black dashes on the screen, no noise from the speaker although microdrive 1 gives a little spin when first powered up. Pressing f1 does not...