1978 Sylvania console problems

[jg6364]

Originally Posted by KV-1926R

Keep on trucking, I consider this one a keeper.

The IC in the pic with the shielding removed, it doesn't look to be soldered in, have you re-seated it?

yes I reseated and checked the connection with a meter on both sides of the board to make sure it was getting a good connection in the socket.

[lnx64]

Why have I seen this problem before.

Having a weird case of Dejavu right now.

[jg6364]

Originally Posted by zeno

OK got the Sams.
IC 400 & Q202 are the AGC semis. Also some eletrolytics
C420, 215, 216, & 211. Also C130 1mf probably mounted
on tuner at AGC terminal.
There is NO AGC adjust at all.
Normal range at IF board pins are
TA22 4.43- 11.31VDC
TA21 4.62- 9.56VDC
Tough to call this one could be AGC or IF dont think video.
Hard to tell not being there.........

PM sent

73 Zeno

All I could do with is IC400 and Q202 was clean and check the connections.
C420 is a .22uf cap and it checked perfect.

C215 is 10uf 16V it check 13.8uf so I changed it with a 10uf 50V it checked as 10.3uf.

C216 is 1uf 50V it checked 1.4uf so I changed it with the same that checked as .974 uf.

C211 is 4.7uf 25V it checked 6.08uf so I changed it with 4.7uf 50V that checked 4.97uf

on C130, there were 3 of the 1uf 50V capacitors on the tuner. They all checked 1.31 or higher so I changed them all with 3 new 1uf 50V caps.

TA22 was 4.05V
TA21 was 4.64V

Thanks for all the information. I'm willing to try any suggestions.

Here is the link to a video of it playing after replacing the caps.
http://youtu.be/A7nO-bvzaHc

[sampson159]

from the looks of the photo,it seems to have locked in sync.is this the case?if so,the only issues i see is that it is in need of a set up.purity,convergence,etc.make sure tuner grounds are proper.

[Bill R]

Have you tried replacing IC400 yet? Still looks like AGC problem.

[jg6364]

Originally Posted by Bill R

Have you tried replacing IC400 yet? Still looks like AGC problem.

I don't have the IC400 to replace. I will have to find it somewhere. Does anyone know where I can find the replacement? It crossed to an ECG820 but I haven't found any yet.

[jg6364]

Well after a lot of cleaning and then a lot of searching for that damn little IC. I finally found an ECG820. Plus I replaced about 15 electrolytic caps throughout the set. The picture finally came back but was WAY out of adjustment. I setup the purity and convergence the best I could. I'm glad this is finally finished. LOL

There was thunderstorm warning scrolling across the bottom of the screen The text was clear but I guess was moving too fast for the camera to pick up clearly.

[sampson159]

glad you got it going!screen shots look pretty good.

[zeno]

Looks like you have a real TV again, I am very proud
of you !

enjoy 73 Zeno

[Jon A.]

Oh yeah!

[jg6364]

I just want to thank everyone for all of the suggestions. You guys pointed me in the right direction.

Thanks so much

Jeff