Question about Televison & Video
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Posted on Jan 02, 2017
SOURCE: 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
Posted on Dec 05, 2007
SOURCE: jvc th-m45 shut off
shut off audio system is performed to protect it from damage due to high current consumption or short circuit in speakers try to disconnect subwoofer first and check if it is ok. the problem in your subwoofer or its cord-change the cord and check if it is ok thats fine if not change subwoofer.do the previuos for all speaker one by one.
if all above failed you must contact service center for help.
Posted on Apr 06, 2008
SOURCE: JVC TH-D60- randomly get nothing
Static and scratching sound caused by dirt or dust in the PCB (printed circuit board) and loose or cold solder joint ;.Clean the circuit board with the use of laquer thinner or alcohol ,so static sound will gone.Cold solder issues - each component is soldered into small
holes on the printed circuit board which in turn connects said component to the
other components. Due to time, heat, use, some solder joints would be cracked
or loose. It is possible that the cold solder is still minimally connected
(hanging by a thread). When the receiver turns on heat would be generated which would
be sufficient to further loosen up the solder joint to the point it no longer
provides electrical contact. Jarring the unit creates movement inside enough to
re establish the contact, sometime good enough sometimes not enough.
Again, since the unit still operates (sometimes) then it is highly probable that there are no defective components. As you have surmised, it is possibly a loose connection, solder joints are "connections" except that molten soldering lead is used to attach/connect the component to the board, "loose connection" in this sense is equal to "cold solder".
Again on the assumption of no defective parts, then seeking a more experienced buddy for the soldering might be to your advantage. This is of course in addition to the possible electrical hazards when repairing....If this solution help you understand the problem :rate as fixya..
Posted on Jul 16, 2008
Check the rear panel for any loose connections, paying special attention to the speaker terminals. If you are using speaker wire without connectors, make sure that you have no stray strands of wire protruding outside the terminals or any broken strands.
Strand wire over time oxidizes and becomes brittle and easy to break so at any time the unit was moved while connected or anything else that would create tension on your connections it could easily break some wiring.
Also check the opposite ends of all of your connections at the speakers and input devices, i.e; DVD player, television etc.
Posted on Feb 10, 2011
Testimonial: "Thanks for the quick response. I have been messing with the speaker connections lately, so that is where I will start looking for the solution."
SOURCE: JVC TH-S11 ...Shuts off after
Generally speaking, an amp attempts to protect itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.
Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.
You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.
If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.
If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.
Posted on Jun 04, 2011
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