Switching supplies in TV's often go into a hick-up mode for protection if there is an excessive load due to a fault somewhere.
I don't think there's an excessive load. There's might be a short in the LV area.
If there's a short at the HV area, I would get explosions.
In line with post #2, hiccup mode is liable to drop the frequency down into a slower range, which could explain audible noises coming from the inductor.
That's most what I think!
I have another working TV, and I desoldered parts of the LV area, to know what's the problem.
Is the earth on the CRT, is could be a corona discharge due to leakge somewhere.
Frank
I don't know what's the corona discharge.
Having been Mfg Eng Mgr at C-MAC we had many "Universal" brand thru-hole part stuffing machines that could handle these parts. We also had different adapters for larger axial parts and a different machine for radial parts in addition to many SMT lines.
My guess is the parts permitted those shops which only had one style of auto insertion handlers for the tape and reel mounted operation for lead bending, insertion, cutting and clinching of 0.3" body axial parts into 0.5" pitch holes. This makes it convenient for low cost manufacturing. These capacitors could easiliy have a large breakdown voltage , suitable for some CRT applications in a monolithic epoxy package, as opposed to larger value Multilayer ceramic caps, which have low voltage ratings<< 500V.
You can still get axial monolithic capacitors of any value and voltage rating, which is all you need to match. Unless it shorted out internally with signs of fatigue, I would not expect this part to fail. How would you classify it's failure mode? electrical or mechanical?
However you may choose a radial just as well as axial and most likely it will be an epoxy coated ceramic bead capacitor rather than a molded epoxy with a cylindrical body. Cost in high volume to purchase is about $0.005 but to buy one only is anyone's guess.
Thank you very much for the information.
>>>>>> Well, today I came from my weekend vacation.
I entered the workshop, looked again to the situation, and thought about the switcher IC in the HV area. It didn't have the 5V from the opto-coupler.
I changed the opto-coupler, measured the voltage on the LV area. Found a missing voltage, followed the voltage of the parts dealing with the opto-coupler voltage.
Found a broken zener diode, replaced it. Replaced also the feedback transistor Q830 as it explained on the schematic diagram.
Now, the CRT works partially, after touching different areas with the DMM.
The beam gun, shows a sign of over heating at the base of the cathode area.
It looks like overheating the wires of the valve until they go orange!