Question about Sony FD Trinitron WEGA KV-34HS420 34" TV

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Volume is too low on my old Sony Trinitron KV-27S45

A few years ago, when you turned on the tv it would gradually gain in volume until you manually adjusted it to a lower-setting. Now, it doesn't raise in volume anymore as you turn it on. It is just so low, only about 3 stations come in any where near audible. What could the issue be? Can i fix it with out parts? If i need parts, would it be less expensive to just purchase a new tv? Thanks for any help! JRHorn

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Re: Volume is too low on my old Sony Trinitron KV-27S45

Volume is too low on my old Sony Trinitron KV-27S45 Can i fix it with out parts? no as it requires tech help as tv is high voltage device. would it be less expensive to just purchase a new tv? it would be less expensive. no need to purchase new tv. please get check 1 speaker paper cone might be hard or defective 2 loose contact in sound section 3 supply to sound might be absent. 4 connector loose. 5 any capscitor defective in sound section. 6 ic might be defective in sound section hope this will help.

Posted on Oct 01, 2007

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My Sony Trinitron volume goes from mute (1 bar) to loud (2 bars) - can increase to even louder but can't get low or medium volumes. The lowest volume is too loud for normal viewing. Any ideas about what I...

If you have some idea about the working of your TV, and some service experience you can do it by yourself. Your TV has electronic volume controls. That means, a gradual voltage rise or lower does the volume to go up or down. This voltage variation is done by an Ic which we call it as "System Control Ic", that every modern TV has; but differ in their type and number. You must know how to follow the schematic diagram of your tv to get the exact point from which the voltage orginates, and which point regulates the same.
At present there is some voltage, say 0.23VDC or so, remains at that control point even if you turned all the visual controls seem to be off; and that voltage suddenly goes up; say 3.05VDC or so when you adjust the volume to the near mid stage. Further saying 3.05VDC must come only after you have turned the volume bar to extreme high. Now you are listning your tv at is 1/4th volume at extreme low I thinks.
Looking for fault at system contol section must be done with patience, and should have schematic diagram of it, and some sort of skill. It is best for you to get service of an experienced service personal, otherwise the the faults will be rise in numbers. All sony tv has complex schematics even go to pages on a book, and have some difficut to follow even an experienced one you know. So think a little better and do the needy.
If you have confidence that you can reach the the above said points, contact me at my mail address which is given below. I will guide you. You must have the schematic digram of your tv also beside you. Ok.

Oct 19, 2010 | Sony FD Trinitron KV-28FQ75 28" TV

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Low volume on Sony Trinitron

There seems to be a failure in your output drive circuit.
All electronics fail suddenly and don't show any signs until the defect is noticed except in the cases of intermittent troubles From what you have described an intermittent defect is not the culprit here. Are you using external speakers or the internal ones in the set? If you are using external speakers disconnect them and see if the internal speakers work OK. If it's both channels at the same time it's in the electronics, not in the speakers. This would require internal service. Unfortunately there is no easy fix for that. Have it diagnosed (which they can't properly do in your home unless it's a very obvious problem) get an estimate first. Those sets are very well made and reliable but nothing is perfect. You need a service call or move it to a shop.

Mar 30, 2010 | Sony FD Trinitron WEGA KV-36FS120 36" TV

1 Answer

Verizon FIOS remote buttons all work except Volume. Sony Trinitron WEGA remote has to be used. Volume is Fixed. Can something be done to control volume with the Verizon remote?

I had the same problem with a Sony Trinitron KV-32FS320 32" TV. I reset the remote to factory default.
  • Press and hold STB
  • While holding STB, press OK
  • Release both keys, wait for device keys to blink twice
  • Press 9-0-0. The STB key will blink three times
Then I reprogrammed the TV control.
  • Turn your television on
  • Press STB to enter Set Top Box mode
  • Press and hold TV
  • While holding TV, press OK
  • Release both keys, wait for device keys to blink twice
  • Press 1-1-2-7. This is one of the Sony TV codes
After this, the volume + and - worked to control the TV.
  • Program any other devices, such as DVD using procedure similar to above.
I hope this works for you.

Apr 25, 2009 | Sony FD Trinitron WEGA KV-32FS120 32" TV

1 Answer

Sound goes off

if this issue persist you need to go to one service authorized

Dec 10, 2008 | Sony FD Trinitron WEGA KV-32FS120 32" TV

1 Answer

SONY TRINITRON KV-2167MT power not on

Please replace Horizontal Output Transistor in KV-2167MT and TV will start function.

Nov 26, 2008 | Sony FD Trinitron WEGA KV-21CL10 21" TV

2 Answers

Sony FD Trinitron WEGA TV Model Number KD27FS170 volume problem

I had the same problem with the volume in digital mode and found the answer here:

The actual solution is towards the bottom of the post and hard to read through, so I simplified the instructions below:

On your remote control (with tv off)
1. press Display, channel 5, Volume Up and then Power
this brings up the service mode (you will see some green text on your screen)
2. Press channel 2 to scroll through options until you see "Micro" in the upper left of your screen
(channel 2 cycles up through the options, channel 5 cycles down)
3. Press channel 1 to scroll through suboptions until you see "DIOF" appear under "Micro"
(channel 1 cycles up through the suboptions, channel 4 cycles down)
4. Press channel six until the default value (12:60) changes to 12:40
(channel 3 increases the value, channel 6 decreases the value)
5. Once the value has been changed to 12:40, press Muting and you should see red text in the upper right hand corner that says "Write"
6. Simply turn the power off and back on for the change to take effect. Your volume problems should now be fixed.

Nov 22, 2008 | Sony FD Trinitron WEGA KV-36XBR800 36" TV

1 Answer

3 year old VEGA TV: LED indicator 9 times blinking

Use remote control:

display, 5, volume +, power

I can turn on my TV, though with the fault codes on-screen. Holp it helps.

Sep 06, 2008 | Sony FD Trinitron WEGA KV-32FS120 32" TV

1 Answer

Tv wont turn back on

Hii.... first I like to know the chassis of yor KV27FS100..
sound like problem with regulated parts block.....and can more helpfull if you count the blinking of the have selft diagnostic at the LED Blinking.....

I hope hear from you soon....



e-mail :

Feb 23, 2008 | Sony FD Trinitron WEGA KV-27FS100 27" TV

1 Answer

Sound Problem

There's a possibility that you may be experiencing problems with the audio output IC -IC404 - All serial numbers produced until July 2003 might use one of these defective IC's. So if your set was manufactured before this date, that is probably the culprit. If not, and you have it connected to a cable box that has its own volume control, it could be that its volume is turned down and by turning up the TV's volume too high that you are getting this distortion. Hope that helps.

Jan 20, 2007 | Sony FD Trinitron WEGA KV-20FS100 20" TV

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