New Member With A Vintage TV

[VA561]

Yes, there is a "hum" sound and I noticed that when I try to adjust the horizontal knob on the front of the tv it does nothing to the image on the screen but when I try the vertical knob it stretches or shrinks the image that is on the screen somewhat.

[jr_tech]

A barely audible hum with the volume control turned all the way up is normal... If it is fairly loud even with the volume turned down, it is an indication that the electrolytic filter caps should be replaced. The "height" and "vertical linearity" controls on the back of the set will likely change the height of the image as well.

jr

[marty59]

Don't run it like that anymore and turn down the brightness control! The horizontal and flyback as well as the crt looks promising which is good news, and you're hearing some audio output. But at this point it's time to pull the chassis's and recap and check for out of tolerance resistors.

Do the power supply and the vertical circuits, and you need to look over the horizontal circuits also to avoid any mishaps. You've got a good starting point to keep you busy on. Next time you turn it on could be fatal.

Hopefully, at this point you have the schematic?