Thought I had this little 9" TV working, but another even tougher problem has popped up. After I originally fixed the set, I ran it for several hours without any problems. Unplugged it and closed up for the night. When I plugged it in and turned it on the next day, the volume was stuck on full blast. I replaced the an IC which serves as the audio OP, volume control, and mute; I also checked for bad caps and cold solder, and measured the voltages on the IC to make sure they were correct. Set works great for a few more hours, again I unplug it and close up. Once again, the next time I power it, the sound is full blast. I only have one more IC left, and I'm not installing it until I know what the underlying problem is! A note about this set; when switched to radio, it uses the same audio IC. The IC is powered by a separate power supply, not from the TV flyback. What am I missing?? BTW please see my previous post "Yoke Replacment" for info about the previous repair.
- posted
18 years ago