Hi, I have a Roadstar 10" CRT TV, PAL/SECAM model CTV1030. The TV has muffled sound when watching broadcast TV signals (analogue) using its antenna input, but when an AV source is connected to its SCART input, the sound is fine.
The set's main IC chip is a Philips TDA9380PS/N2/3I. I'm not an electronics expert, but I found a datasheet for this range of chips online (
I connected the chip's audio output pin directly to an external amplifier-speaker, and the muffled effect was still present, possibly suggesting that something within the chip itself is causing the issue, and not some form of external low-pass audio filtering on the chassis.
Could anyone with experience with this IC chip suggest what the cause of the problem might be?