1971 Sylvania TV - Need Help with Horizontal Hold
 

I am a collector of all things old... as the pic indicates below. That's my "toy" room.
I have a 1971 Sylvania TV 27inch that I keep in my collection room. When I bought it - it turned on fast but the picture turns at an angle.
I finally talked a TV repair shop to come out. They ended up taking it back to their shop. 6 weeks later and 380 dollars later... they kind of fixed it. It would only work with one type of VCR... it still pulled a little on top and bottom. but it worked. They said it was the best that could be done for a 43 year old TV. So I went with it and set it back up.
It lasted 2 weeks with just a few hours of use. Now its pulling horizontally again and no tweaking on the knobs and controls will pull it straight again.
My grandfather was a TV and Appliance repairmen from the 50s to the 90s. I wish I had paid more attention when I watched him repair things... I am an IT guy... but not an old school repair guy.
So my question is - is there anything I can do to work on it myself... or better yet is there anyone from the forum here that lives in the Northern Virginia area that would be willing to look her over and help me out?
I have posted a few pics of it working and then now - not again.
THANKS ALL!!

My pics are in the introduction area here...

http://videokarma.org/showthread.php?t=261723

THANKS!!!

You will probably never get the horz perfect with a VCR.
Every set I have seen before the mid 70's would have hoz tearing.
They wernt made to run on a non standard signal.
Try running a DVD through the VCR A/V inputs or use a cable box
with a RF output.

73 Zeno:smoke:

71 and it does not have a horz hold control? The pic in your orig post shows a complete loss of horz sync.

Hello!
It is actually a DVD / VCR combo. Both ran ok at first... the DVD was MUCH MUCH better though...
But now it wont straighten out at all....
=(

Hc
 

It does have a control on the front to tune and the AGC on the back. But the picture posted is as far as I can get it to straighten up by tuning each of those controls so far.

You need to look for a control called Horizontal Hold, most likely it will be in the
front of the tv, maybe inside a secret little door that only you may know....
It may just say Horiz. But I'm gunna stick to it should be in the front.....
Trun that one a little, and the picture should straighten out. Then later
if you need to, you can turn the AGC, it should be in the back....

That's exactly what I did before. Unfortunately after turning them both.... that's the best i can get out of the picture. . Rhanks.

Post the model number off the back. Also the chassis number
off the chassis. Chassis # will be D10 D12 or something like that.
Usually on a paper tag or ink printed on chassis rear. I should
have the manual & maybe can find something easy.

73 Zeno:smoke:

Model
 

Model - CL813P-1

Serial - 004-1184019

120 volts

60 hertz

240 watts

Sams photofact 1178-3
https://www.samswebsite.com/en/photo...&submit=Search

Update
 

OK folks...
I had the repair guy come back. I told him what all yall said. He now agrees with that.
He said he replaced the HO tube with a used one he was able to find - so it may be bad as well.
He did do some additional work while here. He fixed the end points on the power tube for the horizontal area (it was fried pretty good before it seems).
He also recapped part of the horizontal area that he said looked bad.
Oddly enough it did hold for a few minutes when he put in a Harry Potter DVD (the only one he said he could get to work before)... yeah i know... magic huh? But once you turned it off and back on - it went right back to the horizontal issue.
SOOOOO...
I have already bought a New In Box (old stock) tube to replace the older HO tube i found on Ebay.
I will get it in next Tuesday and update yall..
Keep your fingers crossed for me...
=)
And Thanks for all the help!

Ty
 

Thank You! I will order!
=)

Yo dude. Since there's two threads going on this same issue, re-read posts 9 and 17 in the other thread.
If your set does use a horiz. phasing diode, that part must be replaced first off the bat if the problem is weak or absent horiz sync.

Understood
 

Gotcha. Planning to get the manual so I know which part is which.

if your set is the one in your avatar-it s d-16 hybrid.those were fine,fine sets with excellent crts.they made a brilliant picture.rivaling zeniths of the era.in the shop we called them "big tuners".the next model year was also a d16 but it has slides for color,brightness and tint.the circuit boards ran hot around the horizontal section.you may never get the horizontal to work properly with a vcr or dvd.also,you have a 25 inch set.25vaqp22 crt.27 inch screens werent introduced until the 80s