Question about Goodmans GDVD70W6 DVD Player

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When powered up the 6.3 amp psu fuse blows any ideas thanks

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Replacing a blown fuse once is necessary, twice to be sure that the first had reason to die, then no more as you could be damaging something in addition to the failed part.
This indicates that something basic in the power supply has turned into a wire. The first thing to check would be rectifier diodes that process the incoming AC; these are cheap and easy to check with any multimeter with an Ohms or diode setting and should measure a bunch in one direction and little in the other. With a diode check range, you should find ~ 500-700 millivolts (units are not indicated), on the Ohms range from several hundred to maximum 1 K Ohm in on direction and off-scale in the other.
Beyond that, you will find possibly discrete transistors or a module (on a heat sink for both) for which you will need the pin-out to roughly measure it. The type numbers are a mix of letters and numbers, the production period will be only four numbers so you need the type number to search for the specs and connection diagram.
If these check out OK, then I think your technician days are over and it's time to let a pro look further. Be aware though, the cost of labor and the potential lack of parts availablity can stop the repair completely so if you can't find something already mentioned, like too many things today, it is doomed to the scrap heap.

Posted on Jul 16, 2009

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2 Answers

Amp keeps blowing fuses


Blowing fuses, was caused by many thing.
Short of rectifier,resistor,elco,tube heater,tube pin, and also trafo itself (primary or secondary winding). It must check step by step.
CAUTION :
THIS IS HIGH VOLTAGE AREA.
RISK OF ELECTRIC SHOCK THAT CAN KILL.
DON'T DO THIS IF YOU ARE NOT TECHNICIAN OR NOT FAMILIAR WITH VACUM TUBE CIRCUIT. THE CIRCUIT MAY STILL CONTAINS ELECTRIC SHOCK EVEN IF IF THE AMP IS NOT POWER PLUGGED.


The simple steps (see picture) are:
  1. Disconnect all connection from secondary of power trafo (PLV,PDCH,PACH and PHV).
    Power ON the amp. If fuse is not blowing,trafo is good.
  2. Power OFF the amp. Unplug the cord.
    Connect PLV1-PLV2-PLV3 (this are Bias voltage,+/-15VDC and Backlight PCB voltage) to power trafo.Power ON the amp. If fuse is not blowing,PLV circuit is good.If fuse blowing,there are parts is damage (dioda,elco,7815/7915,resistor) in this PLV circuit.
  3. If step 2 is good,go to next step.
    Power OFF the amp. Unplug the cord.
    With PLV circuit stay connected,connect PDCH 1-2 and PACH 1-2 to power trafo. Power ON the amp.
    If fuse is not blowing,PDCH and PACH circuit is good and all tubes heater/filaments are lights after a few seconds.
    If fuse blowing,there are parts is damage (dioda,elco,tube heater pins) in this PDCH/PACH circuit.
  4. If step 3 is good,go to next step.
    Power OFF the amp. Unplug the cord.
    With PLV,PDCH,PACH circuit stay connected,connect PHV 1-2 to power trafo.
    Power ON the amp. CAUTION: HIGH VOLTAGE AREA is ON.
    If fuse is not blowing,PHV circuit is good.
    If fuse blowing,there are parts is damage (dioda,elco,tube pins) in this PHV circuit.
.amp-keeps-blowing-fuses-01sk4vtrndbaaguwe2brflsj-5-0.jpg
Notes:
  • Steps had to be done sequentially from 1 to 4, not upside down.
  • If tube/heater pin is short,it can't be repair. The tube must be replacing.
  • PDCH circuit is voltage for V1-2-3-4 heater/filaments.
  • PACH circuit is voltage for V5-6-7 heater/filaments.
  • Always replace fuse with same type.

amp-keeps-blowing-fuses-01sk4vtrndbaaguwe2brflsj-5-1.jpg

Oct 02, 2015 | Peavey 6505 Plus 120W Guitar Amp Head

1 Answer

6 amp power board fuse blow when power button pressed.


That is usually caused by shorted output transistors. What brand/model do you have?

Apr 29, 2013 | Audio Players & Recorders

1 Answer

Asrock motherboard no error code display.


No fuse, the protection is in the PSU. A surge will sometimes kill the ram if the anti-surge system (PSU fuse) is a "Slow Blow" type. But the surge may have killed some of the more delicate chips on the motherboard. From your description, it sounds as though you will be able to re-use the CPU and fan. Try the RAM first, you may be lucky. Hope this helps.

Mar 08, 2012 | Computers & Internet

1 Answer

I turned on the TV and it popped and went off and will not come back on


Hi.

When that happens you have usually blown the PSU. The power supply is the board connected to the power cord. If there had been a pop sound, power went off, and now TV is completely off, then the PSU has blown.

There is a 6 Amp 125 VAC fuse in the AC section of the PSU, that is the first part to check.After that test the PSU. Sometimes it is even possible to spot a blown capacitor in the PSU board. They look bulged, sometimes burnt and in some case you can even see a leak. Sometimes is instead possible to see a burnt area that is revealing a short, often in the AC section of the PSU. The PSU is located at the back of the TV. Power must be disconnected before removing back panel. Do not touch PSU. Capacitors can store and release heavy discharge even with power cord not connected. There are also 3 small brown fuses located next to the flyback. Those can be tested using a multimeter. Testing must be done by a trained person.

The PSU cannot be easily replaced with a new one. The part is not in stock anymore (part number was 264102), and it is not even easy to find on Ebay. The PSU must be repaired.

Regards.

Ginko

May 24, 2011 | RCA HD52W59 HDTV Projection Television

1 Answer

My SI-1230 was not working on channels 5-6 and 11-12. I opened the amp and replaced the fuses on those channels. Now the fuses blow immediately on channels 5-6 and the red protection light is on...


Chances are the main transistors or whatever powers channel 5 and 6 have shorted out. Fuses blow like this when there is an overload and these power types do that a lot. If it uses transistors, then a ohm meter will show them up quick. Because it will be just like you have touched the test probes together when you put them on the terminals, with the meter on the 1K setting. For the reason these parts are just acting like pieces of wire instead of doing their job.

Mar 12, 2011 | Niles SI-1230 12-Channel Amplifier

2 Answers

Samsung LN40A530P1F LCD TV keeps blowing main power fuse when i turn set on it blows right away i have replaced fuse many times. Also when back was off i noticed a arcing as fuse blows at a component just...


http://www.samsung.com/us/support/detail/supportPrdDetail.do?menu=SP01&prd_ia_cd=&prd_mdl_cd=&prd_mdl_name=LN40A530P1F
If a fuse blows like that there is a major problem, inside. I suspect that what your are seeing is the inrush thermistor, and they exhibit this under great load. I would explect that this fault maybe in the actual PSU. Due to the lack of service manual support, i would get a quote for repair from an authorised service center.

Jun 22, 2010 | Samsung LN40A530 40 in. LCD TV

1 Answer

Blows 6 amp fuse in top panel. On spin cycle runs the pump but motor wont rotate for spin. If left blows fuse again.


Remove the hoses and check the impeller of the pump for an obstruction.


Thanks for using FixYa - a 4 THUMBS rating is appreciated for answering your FREE question.

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2 Answers

Short Circut, blows fuses instantly.


OK usually the fuse goes because the Amp's IC's are drawing too much current thus the fuse blows... either this OR the Power Supply has gone Kaput. It is possible to replace the output IC's.. as it is to fix the PSU.. But it really is a shop job..

Jul 28, 2008 | Durabrand 5.1 Surround Sound Computer...

1 Answer

Fuse


Hi,

There are only a couple of components that could cause the fuse to blow. They are:
1. Reverse protection diode (D23)
2. filter capacitor (C123)
3. Outputs (TR14 & 15)
4. Audio Amp (IC4)
5. Zener Diodes (D22 & 19)
6. the fuse itself (it should be 2 Amps

Hope this be of help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FIXYA.

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