u/Ayerslu

Hello,

Got this old Sony from a coworker, seems to have lost green entirely. I have already traced things from the neck to IC, and using Gemini it was decided the IC needed replaced. I instakked thr new and issue is entirely the same, now thinking green ray is shorted. Did the red / green pin swap, attached phoyi shows yoshi went orange, which is why Gemini thought bad IC. It is now recommending I do a Floating Heater Bypass, to force green to fire even if the internal green gun has a short. Thoughts? Better do just get a rejuvenation tool? New tv? 🥲

Edit: adding the process Gemini recommended over using the rejuvenation tool. - also, sorry I have fat thumbs

. The "Floating Heater" Modification (Highly Recommended) Many seasoned commercial CRT restorers refuse to zap an H-K short because discharging current through it can completely destroy the heater filament. Instead, they use a clever workaround to bypass the short entirely.

How it works: You physically modify the circuit to provide a "floating" power source to the heater. By disconnecting the heater pins from the chassis ground and manually wrapping a few turns of wire around the flyback transformer core, you create an isolated power source.

The Result: Because the heater is no longer tied to the TV's ground, the short to the cathode simply doesn't matter anymore. The short remains, but it can no longer drag the green video signal down, allowing the gun to fire normally.

My assistant pointed this out today, I'd missed it