GOLDSTAR TV, PROBLEM IS DISTORTED AUDIO SIGNAL TONE CONTROL IC IS GS3203

Wow, old school! Humm...If I remember High gain input will distort a wave form. This means the amp increases the wave voltage to pass the maximum available voltage. But since it can't go any higher in voltage, the wave stops at the max (what ever the supply high voltage is rated at) then flattens out at this peak level until the wave drops back down. Your signal distorts any time the feed goes over the limit. Sometimes this is done on purpose as in Guitar amps where there is a separate dial that controls this 'effect'. I'm guessing you are using a regular amp with very simple controls like volume, tone (Bass, Trebble). Some older dedicated amps do not have a volume input but may have a 'Gain' knob which just about serves the same purpose as the volume control. This gain knob is usually set at a level BEFORE distortion can set in from your signal source. Hopefully once properly set you won't overdrive the amp and get unwanted distortion. The problem rises when there are multiple sources of signal say from a Radio Tuner, Turntable (ceramic or Magnetic), and the newer CD, DVD, MP3 players. You must also note that many of the devices after Y2K (wow 18 years ago!) don't have a 'Line' or low level output. Most equip only have earphone outputs which will be too high for use on amplifier. High level output are used to drive head phones or ear buds. You must use anttenuator device to reduce the power for low level use. Donno, if those are still around as Radio Shack stores have closed down.
* Okay assuming you know all this and your amp WAS working normally at one time, AND this is an old 1950-1970's tube amp. Then you probably have a shorted (burnt?) gain or volume knob. Volume Resistor (Pot) cleaner sprayed into component may help. But usually components this old will need replacement. Dirty pots will cause cracks, pops, and scratchy sounds from speaker. This is the most common cause for unstable volume (gain) in amps.
* Another problem may be a shorted or partially bad signal capacitor which is just off the volume/gain pot or directly at the input of the amp section. Capacitors may go bad if a voltage spike (surge) hits it. These are low voltage devices so it does not take much to spike them. Electrolitic caps will sometimes self heal but fail again as input voltages spike near it's limit. You will need an audio electronic tech to go through and check all the components and replace as needed. Yes this is costly as there are not many 'old school' people around. But with some of these antique prices for tube amplifiers (especially bass guitar amps) you have to decide if it's worth it. There are new tube amps out there for audio pureists, so you may want to check that option.
* Okay, worst for last. Tube going bad (very common). Good luck on finding a replacement. I've seen them available on eBay and Amazon but don't know the quality. Very old TV/Radio shops in an old town may have them and worth a check if they are still open. You may also find them at an old music store.
* There are other possible problems (Power supply, Transformer, Bad contacts on tube socket, Bad solder joints, etc.) But really require a tech to trouble shoot and locating replacement parts to initiate repairs.
* since the problem shows up after the amp is heated up and hot. Check the vents for dust and vac out cob webs and debris. Placing a small (small!) fan to blow on the back may help, but over heating usually causes the power supply to heat up as well and may cause arcs in the high voltage section. High heat also breaks down old style capacitors.
* There is a reason why most people switched to transistors and now power ICs. Tubes have a warmer tone that few people can detect as most of us (Rockin '60-70's) have blown out our hearing long ago.
Aloha, ukeboy57

If you wish to get some details; check the site linked here. Pull up older posts. Jungle IC; means nothing, but the main system control chroma IC.
http://electronicshelponline.blogspot.com/

Does it happen all the time , or when using a dvd or satellite signal?

If its only happens when getting a signal from somewhere other then the tv could be possible cables are bad.

Otherwise if the speakers have tone control in the audio menu, make sure the bass is not turned all the way up.

Speakers are not a easy fix on the tv

I’m happy to assist further over the phone at https://www.6ya.com/expert/robert_54ae41aaaffbab00

A little more triage would be in order before you take a knife to it. What source(s) produce the distorted sound? How about test tones? Same? It's sick. Not same? Something else is going on. Have you referred to the manual(s)?

Have to start with a signal to the audio In of AV. if there is no sound, then open and check the speakers, the audio output IC, check for voltage to the IC,if not check the power supply, if possible a audio test tone canbe applied backwards to see where the signal fails.
It can be the preamp-opamps as the AV is not working.

Hi there,

The distortion you are experiencing could be due to a few things,

Drivers for the device,ie the latest updates applied recently,
This may affect the performance of the units functionality.

The cables not being connected properly,poor signals and connections,

The source from where you original sound signals came from,
ie,over recorded source,too loud for the system speakers to reproduce the correct tones,
this is dangerous to speakers and the listerners hearing comfort too,

The simplist way to check your speakers are ok is to check them on another system with a similar sound device,or plug a set of head phones into you creative 4.1 output on a low volume,
is there a signal output to your head phones???

The most comon form of distortion is the equaliser setting on the original source output,turn it down to help eliminate the frequency your looking for and the adjust EQ to suit your comfort zone.

Apart from this will be unplug each zone and test individually,
should be a quick and painless solution,

Microphone feedback can damage speakers too,,,,,,

If the distortion remains try different speakers on the output.


Hope this helps , MISTERDJ

no audio / please send me the frequency for ahmedabad city

The DVD must be connected with the RCA jacks-plugs [usually black & red] to the INPUT of the VCR, not to the RF connector. You must press the VCR\TV button to VCR so that the VCR takes control.When you place a DVD movie or AUDIO program it could be copied to the VCR. or played through the VCR.

Hi,

What do you mean by explosive change in loudness? The volume goes up and down by itself?

This can happen if you hook an external amp to the audio output jacks on the TV and those jacks are set to fixed output, but I will assume that you are talking about the sound through the TV's internal speakers. If the picture is normal and the On Screen Display (OSD) shows that volume is being turned down then the microprocessor is putting out the correct clock and data commands. You need to find the audio processor IC which controls the volume, tone, balance, etc. and see if the clock and data information is actually reaching that IC. If it is then I will bet that the IC is defective and needs to be replaced. If you do not have an oscilloscope or experience in repairing PC boards then have a qualified tech handle it for you.