Question about Cambridge Audio Amplifiers & Preamps

1 Answer

Failed power transformer

The power transformer has failed and i require a spare. who can supply this item

Posted by on

  • peter reynolds Jan 21, 2009

    Maker- Cambridge audio

    'A' series integrated amplifier

    Model A1 V3.0



    Tx no. NC-V4282TA1

    3200-428201-400

  • cscheffler Feb 06, 2009

    Exact same component failed. Opened up amplifier and used multimeter to verify that 240V AC goes into the transformer and nothing comes out. No information other than part number (NC-V4282TA1, 3200-428201-400) written on transformer.

×

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.

  • Master
  • 4,234 Answers

With out make and model, I can not supply parts information. Please update this with that info. Also, depending upon the age of the unit, parts may not be available. Are you sure that the problem is the transformer? This part is rare to fail.

Dan

Posted on Jan 21, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

My amp was blinking while it was working then it went off.Now it doesn't power up..Crown Xti 4000


Power supply likely failed. Electrolytics are the primary culprit.
It should have a switchmode power supply, so it is lmost likely the 5 volt section failed.

Sep 17, 2012 | Crown XTi 4000 Amplifier

1 Answer

The power has failed on my Acoustic Solutions SP-100 digital integrated amplifier


This is a wonderfull idea, a great way to learn about electronics. Open the top of the amplifier, check for any internal fuses, if they check out, the power transformer may be open at the primary, [ too wires ] If you have a digital meter set it on ohms and touch the probes on the too wires going into the transformer, if no reading the power transformer is open.

Jun 17, 2012 | Amplifiers & Preamps

1 Answer

Dear repair team, I have a Mackie FR1400 power amp, about 12 years old and always been very reliable. On Saturday at a gig, it stopped working completely and blew the mains fuse and all the mains...


It wont be fixed by friday It appears a number of components have failed in the amp If it's not the main transformer , you're looking at $200-300 for a fix

Dec 06, 2010 | Mackie Amplifiers & Preamps

1 Answer

My yamaha P7000 always lights its protection lamp whenever turn on...


The amp will require service. One or more power transistors have failed and the protect circuit keeps the power supply from blowing your speakers

Oct 12, 2010 | Yamaha P-7000 2-Channel Amplifier

1 Answer

Denon AVR 3805 will not turn on. Have tried resetting it by pressing direct / pure direct buttons but still dead


You will need to open out the set and check from the fuses. If ok check on the secondary supply, if the small transformer has failed, unless this powerrs the microprocesor the main transformer and circuit will not be powered. so use a multimeter to check this voltage to the micro-+5, if there is no supply then you will have to check on this power supply. If the supply is present then check on the mP , the crystal osc. for working. clean any dirt or moisture if present.If not there is a possiblity that this section if faulty. Check this out carefully with a voltage reading on the stages. get help if you are not competent. Hope this helps. Good day

Jun 26, 2010 | Denon Amplifiers & Preamps

2 Answers

Behringer PMH 880S Hi; Can anyone help. I am desperatley looking for the schematic circuit diagram for the switching power supply Behringer Model SPS1000/02 which is fitted to the PMH 880S, and also the...


Oh yes... I have repaired several of these supplies.
For the IGBT's use APT28GA60BD15 which are pricey at $9.28 from Digikey.com (still lower than alternative sources. Getting the heatsinks off, one of which has a thermal sensor as well is a real pain! Transformers don't fail...
The C2655's are really 2SC2655-Y and those I get from Allied. The mating 2SA1020-Y I believe is available either at Digikey.com or Mouser.com.
You will LIKELY find the IR2153 chip is blown and that I had to get from Allied. Usually one of the PL4148 surface mount gate drive speed up diodes is blown either short or open (D24 and D25).
Often transistor T9 is gonzo (BC856MTTCT).
Often the 10 or 22 ohm wirewound charging resistors are blown open. I use TWW10J20RE as replacemens for those. Be sure and use silicone to help support them.
Now when you are done with that, you need to find WHY the supply failed. It is either because a ceramic cap across the 85 volts failed OR one of the power amps arced out. If the unit has the HCA2400 amp in it I will tell you what happens: In the vicinity of the SPF9640 MOSFET and a big surface mounted cap will be an arc between layers of the multi-layer circuit board. This shorts and fries the IRFP250 MOSFET and BOTH SFP9640 MOSFETS. The repair of this is major involving carving out the "cancer" and reinsulating with epoxy and replacing blown carved out traces with hookup wire. The proceedure I can't document here, but failure to correct this will result in power supply failing again.
FOR YOUR SAFETY ONLY work on the supply using an isolation transformer. Use a 150 Watt lamp in series for testing to act as a fuse so you don't pop the supply again. DISCHARGE the 85 volt outputs BEFORE plugging the amps back on the power supply.

Jun 07, 2010 | Behringer EUROPOWER EP2500 Amplifier

2 Answers

I Need a power suply


These units don't have a separate "power suppy" per se. There is a power transformer and a separate board that contains the standby power supply components. The main power supply components are on the main board.

Rather than looking for a "power supply", what is the problem with the unit? Is there a standby light?

Dan

Mar 13, 2009 | Sony Amplifiers & Preamps

2 Answers

Technics SUV4X new class A Amp - 20 odd years old but lovely sound !!


Hi guys

Quick check... If the amp still stays in safety mode with the vol turned down and the speakers disconnected, it will have failed in some way. Since you have the safety operation light ON, you can expect that the power transformer is OK. I would expect that you have a DC offset condition on one channel. The most common problems you may have are
  1. dry solder joints about the power stages such as regulators, and output/driver transistors/IC's.
  2. blown output transistors/output IC with possible fusible resistor failures, and or sometimes burnt up printed circuit tracks.
  3. a voltage rail failure from a burnt fusible or power supply component.
If you are up with electronic fault finding, soldering and have the tools, have a go yourself, I could talk you through it. If not, I would suggest you contact you local HiFi specialist and find who can repair it or at least check to see what has failed for you. Good Luck. If you cannot find someone, hit me back and I will try to find someone for you. Cheers

regards
robotek

Aug 16, 2008 | Amplifiers & Preamps

1 Answer

MC1 Switched Power Supply


Hi Hansjo. You may find that if one capacitor has failed, then there may be more. If you see any signs of bulging, leaking, or pushing the bottom out of any caps, then It is a good idea to just change them all. For the small expense, it is worthwhile knowing that your power supply has fresh caps. Try the amp and then see how it goes. If you still have problems, get back to me here and we can talk about it more.

regards
Graeme

Feb 28, 2008 | Lexicon MC-1 Amplifier

Not finding what you are looking for?
Amplifiers & Preamps Logo

Related Topics:

364 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cambridge Audio Amplifiers & Preamps Experts

 Grubhead
Grubhead

Level 3 Expert

4593 Answers

Brad Brown

Level 3 Expert

13569 Answers

John
John

Level 2 Expert

473 Answers

Are you a Cambridge Audio Amplifier and Preamp Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...