Question about Pioneer CDJ-500II CD Player

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Internal fuse blows as soon as transformer switched on.

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  • Scott Frye
    Scott Frye May 11, 2010

    HI...
    Does the fuse blow if you disconnect all the cables going to other assemblies..like the CD drive, front panel etc?
    You might be able to narrow down the trouble by taking things ":out of the circuit"

    There are some folks online who sell replacement parts for that player


  • Rob
    Rob May 11, 2010

    Is there an interal power supply board that converts 120VAC to something Like 12-16VDC in this thing... And then the 12VDC is tapped onto a mainboard?



    If so, check the power supply board for bad components, and check the reverse-polarity diode on the mainboard, if any.

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If the player have been dropped once, it could be a broken circuit board as the transformer sits in between two boards and the mounts for it will bend easily. Or the voltage selector switch on the back are in the wrong position.

Posted on Apr 07, 2009

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Had some power surges and now the unit (XL-MC344) wont turn on. Can't seem to locate a fuse, afraid something more on a component level but have no schematics.


There is a fuse in this unit but it will require a soldering iron to change it. Fuses are rarely the problem. This unit uses a switch mode power supply along with a small transformer for the standby voltage. It is possible that the internal fuse for the standby transformer has opened. The fix for this would be to replace the transformer. This is a common problem with lightning strikes and power surges. WIthout seeing the actual unit, I can't say that this is the problem for sure, but it is likely. Please note that JVC service manuals are not usually available outside of Authorized service centers.

If you can update this with your location, perhaps I can direct you to a local service center.

Dan

Aug 20, 2010 | JVC XL-MC334 200-Disc CD Changer

1 Answer

CDJ 200 meant for US mains supply plugged directly into UK mains supply, now don't work. Replaced external fuse but still don't work..anything else i can try before i bin it?


Dont bin it!!!
If you are really lucky it may have just blown an internal fuse or if your not so lucky it may have killed the mains transformer which is still worth repairing.
If the transformer is faulty and was replaced with one sourced from Pioneer GB then no external 240V to 110V transformer would be needed - you would be able to plug it straight into a UK mains supply.

Jul 20, 2010 | Pioneer CDJ-200 CD Player

1 Answer

Cdj 200s bought from america not working. they have american plugs on at 120v. i have tried an america to uk travel plug and 240v to 120v stepdown transformer but this has not resolved issue....... would...


Yes, fuse may be blown, first check out the fuse of CDJ,
if it does not work. Install a physical 120v American transformer
also change the switch of 240v to 120v from back of CDJ

thx,

djajay

Feb 07, 2010 | Pioneer CDJ-200 CD Player

2 Answers

Pioneer CDJ-400 won't turn on.


sounds like a fuse, is the red stanby light on? if it is and it wont power up , then you may have blown the thermal fuse in the main power transformer

Jul 11, 2009 | Audio Players & Recorders

1 Answer

No power when i plug it up !


HI, check to make sure the wall socket is live by, plugging another device into the socket. if the socket is live, this will confirm a internal issue that concerns the power sector of the unit.

Contact pyle for this repair.

***In some model, there will be an In-Line fuse located inside the unit on the power board or transformer. replacing this fuse(if installed), may fix this issue.(uncommon)

Jun 22, 2009 | Pyle Audio Players & Recorders

2 Answers

NAD C541i CD Player won't turn on


Hi John,
Coincidentally enough, I have a customer's C541i on my bench right now!
At this point, you will need to open the cover and check the fuses. With the cover off, looking from the front, all four fuses are in the back left corner of the player, next to the toroidal (round) power transformer. If any of them have blown, replace that fuse with exactly its type and rating. DO NOT jumper over the fuse, or wrap foil around it. It is EXTREMELY rare for a CD player to blow a fuse unless there is a very serious failure someplace.
If the player blows the new fuse/fuses immediately it will need to be serviced. If the fuses hold, and the player plays, it was just one of those random things.
Now, IF all the fuses are good when you first check it, you have a mechanical failure in the power switch, or a broken solder joint on the board where it's attached. Luckily, a replacement switch is easy to find.

Apr 24, 2008 | NAD C541 CD Player

1 Answer

No power to decks


sorry to say but you may have destroyed the units. USA uses 110volt. Uk is 240volts. There may be circuit protectors, pico fuses, internal fuses, and transformer fuses that have failed. replacing them first is the first approach to getting them going again. An adapter plug is not what you need. You require a step-down transformer to reduce the voltage supplies to 110volts. Check on the units also. There may be a voltage selector switch that you can select the right voltage for the UK. Be careful with how you go. Mains voltage kills. If you are not sure then please go to a tech and have them check the decks over for you. Good luck

Jan 31, 2008 | Audio Players & Recorders

1 Answer

European power supply


The cheapest solution is to use a stepdown transformer - they cost about $15. You can also source a replacement internal transformer for about $70 from semenedis in the UK or others worldwide.

Jan 31, 2008 | Sony CDP-CX240 CD Player

1 Answer

How do I replace a damaged power supply transformer on a DN-600F ?


Hello there. i'll suggest you one quick solution but it maybe dangerous!(Do it the greek way :P) try to remove the transformer from the machine. Take one Ohm meter and measure the resistance of the 120 vac coil. IF THERE IS NOT ANY (i mean that the ohm meter shows nothing diferent than not using it) get a paper blade and start removing the paper cover that it has rounded from the place where the 120 vac wires goes. you will see there that there is a mini thermal fuse.short circuit the thermal fuse and try to measure again the resistance of the 120 vac coil. if you see something between 40 and 80 ohms you are ok. Now that you haven't got any thermal fuse on your transformer just increase your security putting on a 300 mA fuse at the 120vac coil. I have done it with many hard to find transformers and it worked for me.Just be sure that when you plug it on, you will not touch it because i don't know if you are gonna do it right.ok? (say ok!) That was the second solution to your problem. The first and the safest is to go to your local dealer and order a new transformer.

Oct 12, 2006 | Denon DN-600F CD Player

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