Fixing Zenith CCII Avante 25JC49

[zeno]

Big filer cap was reliable, IIRC I changed a few for white humbars, 24 V
supply. The big oil cap has been trouble of late. If opens pix will pulsate if shorts tosses breaker. Also can run hot first. Quick test is undo one
end & see if pix comes back.
When the tripler goes sometime the focus goes high for a time.
Causes CRT socket to arc. Will hiss, smell, & get discolored at
the focus pin.

Zeno

[drwatson32]

Originally Posted by zeno

Big filer cap was reliable, IIRC I changed a few for white humbars, 24 V
supply. The big oil cap has been trouble of late. If opens pix will pulsate if shorts tosses breaker. Also can run hot first. Quick test is undo one
end & see if pix comes back.
When the tripler goes sometime the focus goes high for a time.
Causes CRT socket to arc. Will hiss, smell, & get discolored at
the focus pin.

Zeno

Good to know. The big multisection caps seem to be usually met with doubts in the context of 30's radios. A part of me has always been a little anxious of those blowing apart and spraying the surroundings with scalding hot tar : P

Near as I can tell, things are ok at the socket (pic attached) I'll follow up when I get some downtime to dig deeper, I'd think something that hissed that loud would leave a mark!

[ARC Tech-109]

Originally Posted by drwatson32

Good to know. The big multisection caps seem to be usually met with doubts in the context of 30's radios. A part of me has always been a little anxious of those blowing apart and spraying the surroundings with scalding hot tar : P

Near as I can tell, things are ok at the socket (pic attached) I'll follow up when I get some downtime to dig deeper, I'd think something that hissed that loud would leave a mark!

Depends on where it bites

[Alex KL-1]

Originally Posted by drwatson32

Good to know. The big multisection caps seem to be usually met with doubts in the context of 30's radios. A part of me has always been a little anxious of those blowing apart and spraying the surroundings with scalding hot tar : P

Near as I can tell, things are ok at the socket (pic attached) I'll follow up when I get some downtime to dig deeper, I'd think something that hissed that loud would leave a mark!

With luck, sometimes this "deposit" can be only superficial; but, this seems to be these esay to open sockets (good to check it's innards).

Starts for now with a simple external cleaning