Muffled TV audio - Philips TDA9380 IC

Unless the chip needs an external component or two for sound processing then you've found the problem.

You think it's a faulty chip? I know of another person with the same model TV who has the same issue, so I figured it was either some kind of chip configuration problem, or a design fault on the TV's PCB.

It could be a design flaw with the chip, but given that it's made by Philips, and was apparently used in a lot of "economy" model TVs of various brands, I'd be surprised if such a major flaw had gotten past testing/quality control and into mass production unnoticed.

You didn't mention the other person with the same model/same problem.

If you're not happy with it sell it and purchase something else.

Could be designed like that for a nice 'mellow' sound. And reducing intercarrier etc buzz from a cheap design.

With all due respect, this is an electronics repair group. If you can't offer relevant and helpful advice to people with queries on electronics repair, then don't post.

Most unlikely, and it doesn't make anything sound "mellow" - one can barely hear what people are saying. And low-pass audio filtering wouldn't reduce intercarrier buzz in any event.

With all do respect, go f*ck yourself.

Turn it up then.

Bollocks.

Doesn't help - makes it worse actually.

Duh... buzz is low frequency innit. idiot.

Unless you have an oscilloscope, a handful of electrolytic capacitors, a soldering iron, and spare time, you might as well give it up as a bad job. The audio part of that IC may possibly have one or more electrolytic caps associated with it, which may or may not have failed. It's what I'd try first, anyway, before declaring the TV "Dumpster-chow".

What would you estimate the usable frequency response as heard at the speaker at?

No - that's hum. Buzz is wideband. Have you never heard intercarrier buzz?

I tested the line output on a spectrum analyser. It rolls of after about

Of course I have. The vast majority of it is below 7khz, and there isn't any on this set anyway. You obviously don't know how to answer my question so kindly stfu.

I mourn the day when usenet was abandoned by academics and taken over by conceited amateurs.

You don't need anything like 7kHz for clear speech. If you did, telephones would be no use. AM radio in the UK is 4.5 kHz band limited.

Why are you posting then? A pro would have no problem in sorting out the cause, you conceited little s*it.

Both of those have a lower bass response to match. This set has a very uneven sound by comparison.

I'm posting to ask for advice. I'm not pretending to be competent in this area and wasting other people's time as a result, unlike some people.

Telephone spec is 300 - 3000 Hz.

But make up your mind. You were complaining about 'muffled' sound. Do you understand the common meaning of this, sound wise?

Then you could keep your posts to the point.

You can't help with my question and are completely without clue, although loathe to admit it. All you've done is waste my time and, less importantly, yours.

How to guarantee you won't get help.

Have you tried another speaker? Don't bother to reply.

I gave you advice. Then you in a very condescending tenor insult my intelligence by advising me this was a /repair/ newsgroup.

Let's see you just posted this turd;

Seems you absolutely are pretending to be competent in this area by judging others as /amateurs/.

Tell you what, I more than likely, was doing warranty repairs for major manufactures while you were still in diapers so if you intended to group me in with the conceited amateurs then you have a lot not only to learn about electronics but also who knows what.

If you are looking for someone to guide you step by step on what to check and possibly replace, at the very least provide a schematic of the set.