Question about JVC RX-778V

Open Question

Speakers shorted out, replace fuse - JVC RX-778V

Posted by Anonymous on

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

My AV-502A main amplifier fuse was blown,I checked the power transistors and found 2 shorted,C5198.I replaced it with new one, but the fuses still blown up, including the new transistors.


There are several reasons. If you find one shorted transistor in a push-pull stage you should always replace both. One might be faulty but not shorted, but when in operation it does the other one in. You might have also missed another shorted part such as a diode or voltage regulator. Hunt around looking at the circuit of the confirmed shorted parts and test or replace anything off that circuit.
Finally check your speakers and wiring to them. Shorted output transistors have generally two ways of going like that. Wires touching each other or bad speakers, or having it too loud!

Feb 02, 2016 | Audio Players & Recorders

2 Answers

No power. Fuse was blown but replaced fuse and still no power.


If fuses blown there is a case to search for short circuited active parts examples are end-transistors caused by clipping speakers cable shorts leaking or convexed capacitors but any new fuse will blowing again and again also the bridge rectifier to make dc voltage inside the power supply of the subwoofer can caused this problem

Jul 19, 2015 | Polk Audio DSW PRO 500 Subwoofer Speaker

1 Answer

Where is the fuse in a xr1220 mixer.


which fuse?? main fuse? output fuses?

if the main fuse has blown & the device simply won't power up, replacing it will merely result in another blown fuse - you need to take it to someone who can repair the units' power supply

output fuses blow when speaker wires are shorted, or speakers fail short - they're on the main circuit board, but seeing you're asking, i'd suggest you don't open the unit, but take it to someone who knows what they're doing

Feb 21, 2015 | Peavey Audio Players & Recorders

1 Answer

Works on one channel, have replaced the 630mA and 2A slow blow fuses but they have blown again.


Disconnect the dead channels speaker connection at the Amplifier, if the short goes away then you have a shorted speaker voice coil or wiring to speaker, if still blows the fuses you have an output Transistor circuit that is shorted, and the Amplifier will need to go to a qualified home electronics repair shop for testing and repair, be advised the average cost can exceed $100+

Dec 15, 2010 | Audio Players & Recorders

2 Answers

When right channel is wired it shorts out the power supply. Aragon 8008 when powered up without input and output, no problem. When connected with speakers and line level feed in, the left channel works...


Fuses blow when there is an overload caused by a short circuit. If the speaker you connect up to the amp causes a short. There is either a shorted part in the speaker or the wires to it are touching at some point. Assuming you can sort out the speaker issue and connecting a good speaker with good wiring and it still causes a short and blows a fuse. Then it's likely the output device(s) in the right channel have developed a short themselves. Perhaps as a result of being connected to faulty wiring or speakers.

Jul 18, 2017 | Aragon 8008 MK II 2-Channel Amplifier

1 Answer

Where is the fuse? I thought I would check to see if that is why it doesn't have a sound CT Series Model CT120 Thanks


Speaker system themselves do not have fuse. If it has a built in amplifier it will have fuse in the circuit, but a blown fuse indicated a short which means replacing the fuse will not cure the problem. It will just blow another fuse untill the short is corrected. Electronic circuits shorts because of defective semiconductors. Sometimes capacitor shorts out too.

Jul 02, 2010 | Velodyne CT-100 Speaker

1 Answer

Samick sga 120 amp keeps blowing fuses. replaced all rectifier diodes and tranformer seems to be working fine. any suggestions?


Fuse blowing is due to excessive current drain and the the first clue is the blown fuse itself. If the fuse blows with a flash a bang and splatters copper across the inside of the glass you have a hard blow caused by a dead short on the power supply, check for power switch flashing over internaly. Short circuit main filter capacitors. Shorted turns in power transformer primary winding. If fuse just separates check for short on output transistors C to E. Try isolating fault by disconnecting LT pos/neg supplies to output stage. Also check for partial shorts on speakers and speaker wires using an analog ohm meter on low ohms setting.

Mar 27, 2010 | Audio Players & Recorders

2 Answers

Blown fuse in Subwoofer unit, what amperage to


usually it is 0.5 amps. if it still blows, you might have a shorted board.

Nov 25, 2009 | Logitech X-530 5.1 Channel Speaker System...

1 Answer

SWA1501 Sub blows fuses when turned on...


Shorted amp or blown speaker. Other things could also cause it. But there is a short circuit in it.

Mar 08, 2009 | Mackie SWA1501 Subwoofer

Not finding what you are looking for?
JVC RX-778V Logo

Related Topics:

19 people viewed this question

Ask a Question

Usually answered in minutes!

Top JVC Audio Players & Recorders Experts

 Grubhead
Grubhead

Level 3 Expert

5017 Answers

The Knight
The Knight

Level 3 Expert

73665 Answers

Henry  Thomas
Henry Thomas

Level 3 Expert

1074 Answers

Are you a JVC Audio Player and Recorder Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...