Question about Sony KV-27V42 27" TV

2 Answers

No sound coming out of the internal speakers

My set originally died with 4 blinks. I replaced the Q501 (2SC5426) and my TV now turns on (no more blinks) but now there's no sound coming out of the speakers. I have the L and R wires connected to the board and I know I'm sending audio because I can hear the sound when I connect external speakers on the "Audio Out" jack. I'm suspecting the IC401 that's on a heatsink. I will measure the Vp to make sure I'm powering the IC.
Is there more to the orginal blinking problem that possibly blew something else? Thanks.

Posted by on

  • camellion Apr 19, 2008

    Interestingly, the "audio out" jack is working and I can even change the volume on the ext amp'd speakers with my remote. I also measured the AudioVCC to be 14.5V which means the power distribution is ok. According to the schematic, the same audio signal going into the audio out jack is tapped in the audio amp IC401 before it goes to the baffle speakers. I measured 14.3 on pin 4 and under a volt on the other pins (except for NC and GND pins). Could this be the problem? I'm curious how this part could go bad. I'm ordering the TDA7057. I'm always suspicious about ICs that are on heatsinks.

  • camellion Apr 21, 2008

    Does anyone have the service manual for the kv24V42? I realized I've been working on the "S" version kv24S42 and some of the ICs are different/missing. I started tracing the audio signal on the A/V switch (IC203) and the IC pkg is different between the models. The audio amp (IC401) seem to be ok since I'm getting the right voltages on the pins.

    Many thanks to those that have helped so far!

×

2 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

I have sound but no pic. and the standby light keeps blinking

Posted on Dec 26, 2009

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Genius:

    An expert who has answered 1,000 questions.

  • Sony Master
  • 1,667 Answers

I myself do not have a copy of the service manual to see the transistor that you replaced.

I would use a scope and trace the audio path to see where it is stopping. It is possible that the output IC is damaged, but this is rare. It is very possible that part of the distribution from the power supply is also not working. There may be a series resistor or fuse resistor that is opened somewhere if the voltage is missing. If you replace a series resistor that is opened, before turning on the power find out where the short is that caused the damage in the first place.

Turning on the power after replacing parts, and not verifying and fixing the the cause of the failure will usualy lead to the same parts failing again.

Jerry G.

Posted on Apr 17, 2008

  • Jerry Greenberg
    Jerry Greenberg Apr 19, 2008

    If the set has an earphone jack, check to see if the jack is working properly, and not defective. Some earphone jacks cut the speakers when the plug is inserted. I have had defective earphone jacks cause loss of sound.



    You can also look for cold solder connections on the circuit board.



    Your only way to find the audio is to trace the audio path with a scope and see where it is stopping. This is what is normaly done to find where the audio is stopping.



    You could shotgun it and replace the audio output IC as a first try, and then start replacing parts all the way back to the audio demodulator area. This is not a feasible way to service a set.



    If you have sound out the phono connectors on the rear of the set, audio out from the earphone jack (if present), and no audio out from the speakers, this is usualy one of the easiest types of problems to find in a TV set.





    Jerry G.










×

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Internal circuits


Maybe the TV speaker "cable" is shorted.

May 19, 2017 | Pioneer PDP-5020FD 50" 1080p KURO Flat...

1 Answer

No audio,tried menu items and selections,nothing.The sound just went out,what do you think it might be?


There is no sound or low volume coming from the television speakers.
Solution Follow this procedure to troubleshoot when there is no sound or low volume coming from the television.

NOTE: Because each of these steps represents a possible solution to this issue, check the television status after completing each step.
Increase the volume of the television. Ensure the television audio has not been muted. Ensure no headphones are not connected to the television. If using a set-top box with a volume control, increase the volume of the set-top box.
NOTE: If the set-top box is connected using an Audio/Video (A/V) connection, ensure that the A/V cables are connected securely to the appropriate video input on the television.
Verify that the MTS settings of the television are set to MAIN or STEREO .
NOTE: If the source device is not set to stereo or is not capable of transmitting a stereo signal, sound may come from one speaker on the TV only, and the volume will sound low. In this case, adjust or replace the source device.
If the TV has a Simulated effect in the audio menu, turn it off . Ensure the televisions speakers are not set as the center speaker.
NOTE: Some televisions allow the televisions speakers to act as the center channel speaker when using a multi-channel receiver.
Verify that the speakers are set to ON in the television menu.
IMPORTANT: If the television has audio output jacks and they are connected to a stereo system, then the speakers on the television may be turned off. Some televisions require the internal speakers or the center speaker setting to be off before audio can be sent out to a stereo receiver via the audio out jacks.
Ensure all audio and video cable connections are properly connected to the television.
Test the television using another source like a VCR, DVD player or Blu-ray Disc™ (BD) player.
Reset the television to the original factory settings. To reset your TV to factory settings, turn the TV ON. Then, while pressing the UP ARROW button on the Remote Control, press the POWER button on the TV. The TV will turn itself OFF then back ON.
NOTE: If your remote control does not have a RESET button or the procedure did not reset the TV to the factory default settings, perform a power reset.
If the issue is still unresolved after completing all the troubleshooting steps suggested, service may be required.

Jan 30, 2011 | Sony FD Trinitron WEGA KV-36FV27 36" TV

1 Answer

The sound does not come out of the speakers when I use my tv panasonic plasma, but when I use dvd,cd then sound comes out of the speakers, I have looked at the manual , help please, when it was set up this...


hi,
set tv in tv mode
go to audio setup then check the audio output settings. it should be in internal speaker setup,
then only u can hear the audio though ur tv. if it is in amplifier mode then the internal speaker will be off. check it first.
ok

Jan 11, 2011 | Harman Kardon HS 200 Theater System

5 Answers

Sony bravia 46 shutting off a blinking 6 times


here's blink codes for sony bravia


1 blink abnormal AU Power Voltage
2 blink abnormal d5v/a9v power voltage
3 blink Abnormal panel voltage
4 blink backlight failure
5 blink abnormal main power voltage
6 blink abnormal speaker voltage
7 blink internal temp. rise
8 times ic5000

that helps?..

Sep 11, 2009 | Sony BRAVIA KDL-46S2000 46 in. LCD HDTV

2 Answers

No sound from tV speakers


check your speaker, use a battery 1.5vdc tap it to speaker wire if the speaker is ok you can hear a click sound as the wire touches the battery + & - .

Sep 10, 2009 | Sony FD Trinitron WEGA XBRKV-40XBR800 40"...

1 Answer

TV comes on and off


Hi,
If it is Sony KDF-50E3000 TV then its symptoms of weak Lamp that requires replacement.
You can purchase required XL-2500 Lamp from Sony Accessories Store.
Always buy Sony Original Lamp for your TV and avoid aftermarket / cheap lamp.
Thanks.

Apr 27, 2009 | Sony KDF-50E3000 Television

1 Answer

Sony kdf-60xs955 picture but no sound


Check your TV menu and see if the internal speakers are turned off. Sony opts to cut sound to the internal speakers when you have an external audio amp hooked up for sound, hopefully for obvious reasons. Most audio amp problems inside the TV will result in 9 blinks of the red power light and the TV failing to turn on. If that doesn't help, you may need to have the set repaired.

Aug 15, 2008 | Sony Grand WEGA KDF-60XS955 60" Rear...

1 Answer

Sony KV-27FV16 no sound


Try going into the audio settings part in your menu and select reset audio settings.

May 16, 2008 | Sony KV-27FV16 TV

1 Answer

Audio


Do you have menu btton on front of tv if so press menu then use your channel up&down bottons to move to audio then use vol- and vol+ to turn sound on.also check to see if speakers are on internal or external make sure it is on internal speakers. you can go to dollar store buy 4 in one remote controller only 5.00 codes are in book .your code 000

Jan 24, 2008 | RCA P52926 52" Rear Projection Television

2 Answers

I have picture but no sound


go into the audio menue to turn speakers back on

Dec 27, 2007 | JVC AV-56WP30 56" Rear Projection...

Not finding what you are looking for?
Sony KV-27V42 27" TV Logo

Related Topics:

427 people viewed this question

Ask a Question

Usually answered in minutes!

Top Sony Televison & Video Experts

kakima

Level 3 Expert

102366 Answers

The Knight
The Knight

Level 3 Expert

73438 Answers

Jerry Greenberg
Jerry Greenberg

Level 3 Expert

1667 Answers

Are you a Sony Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...