JVC AV-36150 getting dopey

[Paul Knaack]

Hello everyone,
The last few days my trusty JVC AV-36150 tv has been acting up. First problem ever with it. This is our main tv. Here is a video of the problem starting about 50 seconds into the video.
It might play for many hours without problem or it might do it multiple times in five minutes. (Sorry for crappy video quality). but picture collapses couple of inches at top of screen. So what do you think? cold solder joints, or bad cap, or ?
Thanks

[zeno]

Originally Posted by Paul Knaack

Hello everyone,
The last few days my trusty JVC AV-36150 tv has been acting up. First problem ever with it. This is our main tv. Here is a video of the problem starting about 50 seconds into the video.
It might play for many hours without problem or it might do it multiple times in five minutes. (Sorry for crappy video quality). but picture collapses couple of inches at top of screen. So what do you think? cold solder joints, or bad cap, or ?
Thanks

For some reason the links arent showing up but are here !
Anthows JVC vert problems are almost always cold joints at the
vert output IC. Very common in other brands too........

73 Zeno

[Paul Knaack]

Originally Posted by zeno

For some reason the links arent showing up but are here !
Anthows JVC vert problems are almost always cold joints at the
vert output IC. Very common in other brands too........

73 Zeno

Getting close to a year since I worked on this and its still working great. Turned out it was cold solder joints on the vertical output IC, just as you said.
Just wanted to thank you guys for the help

[zeno]

Glad it worked out. We sold JVC for about 5 yrs in late
90's. Had very good luck with them, only fails were
those connections & a few totaled by lightning. Dropped
the line when they got as expensive as Sony & most
went Sony for the name.

73 Zeno

[Paul Knaack]

Thanks Zeno,
Were you able to view the video? I tried to insert the video url in the insert image box and thats how it posted. i'm not sure how to post video. Try this link to my photobucket:
http://s834.photobucket.com/user/kna...ebbdf.mp4.html
I'll pull the tv out this weekend (150+lbs) and see if I can figure it out. Think I'll do any more damage if we continue to use it?

[zeno]

Its best not to run it. Toshibas used to get a bad cap that would
kill the IC in seconds. Shouldnt be hard, usually connections,
if not an electrolytic. Anything else would be very rare. The
link does work........
BTW if you dont have help moving it the easyest way is pull the back
wrap your arms around it from the front & grab the sides. Wont
slip out of you hands that way. Watch the neck of course !

73 Zeno

[Zenith26kc20]

From the picture, the problem at the top of the picture is caused by an electrolytic. It usually is located at the catode end of a silicon diode in the vertical circuit. It's drying out. If it fails altogether, the IC overheats and dies. Use a 105 degree cap as it is so near the vertical IC they tend to dry the 85 degree capsa out.

[Paul Knaack]

Thanks guys,
Hopefully I can work on it Friday afternoon. I'll probably have more questions then. I really appreieciate the advice.