Quote:
|
1 Attachment(s)
Now on to the color for now. Everything seems to be fine except for colors with magenta. As you can see the magenta bar fades off into red which I attribute to bad phasing in the G-Y(?) channel. I just am not sure how I would fix it (Phasing adjustment?).
|
Quote:
|
Quote:
|
Quote:
|
Quote:
|
Using the scope proved inconclusive, I couldnt get the scope to lock on to any trace coming from the demod tubes. The trace wasnt stable enough to get any pictures of it without it being cut off. Hmm, should I just try a color set up per the manuals instructions?
|
Interesting the worst smear is between magenta and green. This color transition is the greatest phase swing. This suggests that the chroma channel response is bad.
The chroma response of the later (CTC4 on) sets is dependent upon a good complementary video IF and chroma channel response. |
Quote:
SwizzyMan, what kind of scope do you have? If it is capable of syncing on a separate signal from the one you are viewing, it's good to know how to do that for future reference. You could sync on the luma, the sync separator stage, or just by putting a probe somewhat near the flyback (not too close!), and then look at whatever you wanted with the other input. |
Quote:
|
Quote:
|
Can't seem to get the scope to trigger. I really need to look for a better one here soon anyway. I'll keep messing with it, maybe I can get it to trigger.
|
What I see is video ringing in the earlier picture. Looks like you were on the right track with the peaking coils and such in the last video and IF strip. The color problem is what we used to call poor color fit. More often than not it is caused by a problem or poor alignment of the IF strip. I would set up to do an IF sweep alignment and see what the response curves look like. A proper IF alignment may solve both problems. I will bet it is off more than you think.
|
Sounds like an alignment is in order this weekend. Unless I can do it with the chassis on the bench with no hv or crt.
|
Uh, that's how you're supposed to do it...
Read the alignment instructions, or better yet if you have a B&K 415 use that it'll cut your time in half. |
All times are GMT -5. The time now is 01:45 AM. |
Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
©Copyright 2012 VideoKarma.org, All rights reserved.