Question about Audio Players & Recorders

1 Answer

Hi i have a panasonic amp which dosent power up i have done some cold checks and found one of the 4amp fuses blown so i replaced and it blew amp is still dead no power i suspect the transformers gone??can any one help?.

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Audio Player... Master
  • 5,056 Answers

Fuses blow because of an overload. I suspect you are looking at the wrong place in the transformer and power supply. Instead look at the main power amp board on the things sat on the heatsink, they will be the cause of the overload. If they are transistors you will find one or more with a short circuit, with a simple test with an Ohm meter. Just connect the leads to the terminals of the device. If you find one where it's like touching the test probes together! You have found the faulty part.

Posted on Jan 16, 2013

6 Suggested Answers

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

kimberleykid
  • 5 Answers

SOURCE: Channel short

Hi there, sounds like you may have a short to ground on the output transistors. Does it have transistors or an IC output. It is most likely that you have not replaced a mica washer or insulator. Check to ground with a meter from the case of the output devices.

Posted on Aug 28, 2007

  • 1 Answer

SOURCE: pioneer m-770 will not turn on

you probably have a short in the circuit some where. you need to replace the transistor and look at all the solder joints to make sure there not damaged or cracked. i have the same amplifier and i replaced the fuse several times and it blew every time up until the last time when the 4 of the power output transistors blew. what ever you do do not try and power it on till you do all the things i told you or you will have sparks and fire. my mistake cost me my amplifier. but might help you get yours repaired

Posted on Dec 24, 2007

  • 4 Answers

SOURCE: NAD 370

Hi There is no circuit breakers inside. close to front panel on a left side under plastic cover is fuse (AGC type) . Before you change fuse look at four filter capacitors in the middle of unit!!! (close to power transformer on pcb) If they are white do not change the fuse and get unit to good service center( it must be someone who knows what they doing!!!) If the caps are different color (black ,purple) you can try to change fuse. Once again if capacitors are white do not use unit-fire hazard!!!! I'm long time service guy for NAD so trust me on this one Dariusz  dariusz70@verizon.net

Posted on Feb 13, 2008

  • 4234 Answers

SOURCE: Bose SA-3 Amp / Blown Fuse

The problem is not the transformer. You now have shorted output transistors at the very least. By corssing the wires you presented a zero(0) ohm impedence load to the output section. It quickly went into overload. Before the fuses had a chance to open up, the outputs fried. This unit will require new output transistors and perhaps the previous driver circuit will require parts as well. Figure on $20-$50 in parts plus hte local labor rate for the repair.

Dan

Posted on Oct 01, 2008

Grubhead
  • 5056 Answers

SOURCE: Loss of audio output right channel

Take a look inside see if the amp uses transistors or an IC. If it uses transitors you can put a Ohm meter accross the leads (no power on) If it reads 0 (digital meter) or the pointer swings full over on the leads of any the transistors it's blown. If an IC then the thing might look damaged.

Posted on Jan 27, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

40 amp. fuse keeps blowing out on 2008 harley


You have a short. Check the insulation on all wiring that carries + voltage - possible that some wire may have lost insulation and is abutting some metal part shorting it out.

Aug 24, 2015 | 2008 Harley Davidson FXCWC Softail Rocker...

2 Answers

Why tcl42u22 has no power


Panasonic tc-l42u22 4amp fuse blows replace 2 diodes nte#116 or nte 552 600v 1 amp silicon rectifier fast recovery

May 10, 2014 | Panasonic TCL42U22 42 in. TV

1 Answer

Can your power cord be bad on a panasonic plasma tv to cause it to turn off and not start again and blow a fuse on pb


The main power regulator board will have some shorted component/s on it. Normally, these boards to plasma TVs are irreparable. Card base replacement should be done.

Jan 29, 2013 | Panasonic TH-C42HD18 42 in. Plasma TV

1 Answer

The mains input fuse (4amp) and a (1amp) fuse on the main power out board were blown. Replaced fuses and switched on, blown again, disconnected output from transformer to main board (4amp) fuse did not...


The cheapest option is to replace the transistors (a quick check on google will tell you how much they are). If they are common transistors you will be able to find them and get them quicker then searching for a board that could be no longer being made.

Sep 02, 2010 | Mackie SWA1501 Subwoofer

1 Answer

Fuse keep blowing


Means that item the fuse is protecting is bad.Fusing unit is a good start replace it

Apr 01, 2010 | Office Equipment & Supplies

1 Answer

Subwoofer Repair


replace the sub and if it has a built in amp you may want to check the amp as well

Oct 10, 2009 | Logitech Z-5500 Computer Speakers

1 Answer

Panasonic NNA554W blows 10a fuse when microwave comes on


Possibly the interlock monitor switch is bad or out of adjustment. This switch is designed to create a short circuit across the power line (and then blow the fuse) if you attempt to defeat the door interlock and operate the oven with the door open. A shorted capacitor or diode could also cause the fuse to blow. Because of lethal voltages inside and the possibility of microwave leakage if repairs aren't done correctly, you are best off leaving microwave service to professionals.

May 15, 2009 | Panasonic NN-SN657SMicrowave Oven

2 Answers

Fuses for P-07


the fuse you need is a t4al 250v

this is a common slow blow 250v 4amp fuse.

You can get them at RadioShack



Oct 03, 2008 | Gemini Sound Products P07 2-Channel...

3 Answers

Blown fuse


check mcm electronics, if the fuse keeps blowing you have bigger problems.

Sep 03, 2008 | iLO 3200 32 in. LCD Television

2 Answers

Sylvania 6632 LG blows fuse when plugged in


I too had this problem. I read some posts on this site about how to repair it, and low behold, they worked! I took the back off of the TV, and the first thing I found was the fuse was blown. With my meter, I checked the first 1N5406 rectifier diode after the fuse, and found that it had shorted out. Then I had to learn to desolder the diode, which I learned about on Youtube. I bought a pair replacement diodes at Radioshack for $1.49 and four replacement 125 volt 4 amp fuses. The whole repair cost about $5.00 and a few hours about learning about electronics. The TV works great! Good times!

Jan 24, 2008 | Sylvania 6632LG 32 in. LCD HDTV

Not finding what you are looking for?
Audio Players & Recorders Logo

Related Topics:

18 people viewed this question

Ask a Question

Usually answered in minutes!

Top Audio Players & Recorders Experts

kakima

Level 3 Expert

102366 Answers

 Grubhead
Grubhead

Level 3 Expert

5047 Answers

The Knight
The Knight

Level 3 Expert

74106 Answers

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

Answer questions

Manuals & User Guides

Loading...