Question about JVC TH-M505 System

1 Answer

JVC TH-M505 No Sound

The DVD home theater system JVC TH-M505 itself works, it plays DVDs and toggles between cds and the radio, but the subwoofer light does not come on and there is not any sound coming out of any of the speakers. This just happened all of a sudden and I do not know what to do. I have tried unplugging and replugging in the power, but that did not work. Please help!
Thank you,
CZ

Posted by on

  • fredviana Feb 24, 2009

    Hi. I used to have the same problem. But suddenly it disapered and the speakers began to work but not the sub. I can`t change the bass level by the remote control. Is there sthg related to the trouble described above by clareesa? tks in advance,
    Fred

×

1 Answer

  • 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.

    President:

    An expert whose answer got voted for 500 times.

  • Master
  • 624 Answers

It is possible that a fuse has blown in the sub-woofer box. This unit has the entire amplifier built right into the sub-woofer. It also has a number of fuses in it. I have found that over the years fixing these units that if a fuse is blown you will also have more serious problems in the amp circuit. That is usually why the fuse will blow. They sometimes even have a problem in the main head unit with a digital transistor that is a surface mounted transistor that will cause this problem also. This transistor is part of the turn on circuit that signals the sub-woofer to turn on when the head unit is turned on. None of these problems are an easy fix I am sorry to say.

If you have at least a little experience with electronics and the right tools, like a multimeter and soldering equipment, I may be able to help you figure out the problem. But be aware that these are not easy to fix, and you may spend lots of time trying to figure it out just to find out that you will still need to take it in to a service center and in many cases when somebody tries to fix these type of units and have no experience with them they often cause more problems than they have started with.

For starters you can at least check the fuses, but please be sure to unplug the entire unit from the wall outlet before doing anything, there is a big risk of electrical shock.

The bottom of the sub-woofer has 6 screws in it (If I remember right) and those 6 screws must come out, they are rather big and you must use a number 2 phillips head screwdriver. Then after that you must take out all the screws from around the edges of the black metal panel where the speakers plug in to. When those are all out you can pull the amplifier unit right out of the sub-woofer box. Be careful when you pull it out, you will need to unplug a set of wires to get it all the way out, maybe two sets of wires, I am going off of just my memory right now, but if you need more help I will look up the service manual to help you more.

You will find at least one fuse right near the board where the A/C plug goes to and then you will find a few more fuses on the board that is on the right side while looking at the amp block from the same position you pull it out from and this board is plugged into the bottom board and is vertical but the short side is up and down, the long side is going towards the back of the amp and it is running along the metal chassis on that right side.

I hope this helps you, if you need more help just post your questions here.

Dave

Posted on Nov 26, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

JVC Home Theater System M505 The subwoofer will not come on and it appears that the system (speakers) will not work at all until it runs thru the subwoofer system.


Wiggle on the long round cable connected to the Sub woofer. If the SW turns on, open it and solder the connector or change the connector

Jan 18, 2010 | JVC TH-M505 System

1 Answer

Black and white and scrambled picture of jvc th-m505


I know you hate to hear this but most JVC parts are propitiatory

and they wouldn't sell you the part .

Most of the parts are surface mounted so for the amateur solderer

its out of the question.

You can find this receiver for about the same or less than you can have it fixed .

Mar 27, 2009 | JVC TH-M505 System

1 Answer

JVC TH M505 Subwoofer not working


i need to find the wire that connects from the subwoofer it has like little spikes inside the medal part and the spikes broke off

Jan 12, 2008 | JVC TH-M505 System

1 Answer

My subwoofer doesnt sound


check your manual
If you dont have one , you can websearch one very easily.

Dec 09, 2007 | JVC TH-M505 System

1 Answer

Subwoofer not working


http://support.jvc.com/consumer/product.jsp?archive=true&pathId=30&modelId=MODL027222

cut n paste the link for the manual

Are headphones plugged into it?

Is the headphone jack damaged?
Are there speaker fuses on this model? If so, check them.

Dec 06, 2007 | JVC TH-M505 System

1 Answer

Subwoofer shuts down


Check the connection in the back of the sub,where your wire plugs in from the DVD unit, the connector is loose in the unit itself. Had mine replaced and is doing the same thing again

Nov 24, 2007 | JVC TH-M505 System

1 Answer

How do i unlock my jvc th-m505 dvd digital theater system?


Hold the STOP button and push the EJECT button.

May 15, 2007 | JVC TH-M505 System

Not finding what you are looking for?
JVC TH-M505 System Logo

387 people viewed this question

Ask a Question

Usually answered in minutes!

Top JVC Home Theater Systems Experts

Donald DCruz
Donald DCruz

Level 3 Expert

17129 Answers

yadayada
yadayada

Level 3 Expert

60769 Answers

kakima

Level 3 Expert

96396 Answers

Are you a JVC Home Theater System Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...