Zenith System 3 Dim CRT

[Jonathan]

A coworker of mine said he has a 15 year old Zenith System 3. He said just recently the picture started going very dim. He said he adjusted the brightness and it never did much. Since I really don't know this type of set I figured someone here would know. Is it a common problem or is it unheard of.

Thanks.

Jonathan

[andy]

If it's dimmer on one side than the other, there's a cap in the 200v supply to the CRT that tends to open.

[Jonathan]

Andy,

Which cap is it? Is it the only one in the supply? I'll let him know and maybe he'll have me fix it.

Thanks.

Jonathan

[andy]

It's going to be a high voltage electolytic near the flyback(around 20 uF at 315v was common in Zeniths). When it opens, the pictures gets dimmer, mostly on one side of the screen.