Question about Marantz SR-7200 Receiver

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Over heating pwer regulator IC and Transformer of MARANTZ SR 7400

Power transformer and regulator ic gets over heated but works normal

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

SOURCE: Marantz sr 500 going to "protect" mode when on.

Change the audio amplifiers IC´s because are on short circuit

Posted on Oct 02, 2008

hokuwho
  • 306 Answers

SOURCE: buzz in amplifier power transformer.

All transformers buzz though you cannot hear it normally. The big transformers on power lines like to buzz for all to hear. When a transformer in a stereo amp gets old and deteriorates or gets hot and  expands the coils, melts the coil varnish and epoxy coatings then rattles at 60 times per second.    You can ignore it or change the transformer. There are too many layers of windings to try to stick anything in there.  Disconnecting a transformer results in inductive kickback -that's not money. It's a big, whopping electrical gotcha! Be careful! Good luck, Steve Medley

Posted on Nov 09, 2008

killer_clown
  • 86 Answers

SOURCE: NO POWER - MARANTZ SR-5000

you mite not have to reset it, try checking ur fuses, it could of triped the cicrut when the power went out, normaly thats what happens unless it was a direct contact then, u mite wanna go get a nother receiver, and what i mean by direct contact, i mean like directly pluged into the wall
hope that helps

Posted on Feb 13, 2009

  • 1 Answer

SOURCE: Marantz SR-18ex remote control number

If you mean the model number, that is: RC-18SR

Posted on May 15, 2009

  • 4 Answers

SOURCE: marantz sr7200

Most likley, if I'm right, you have heard some staitcy, crackly noises, accompanied with this failure. If so, the problem is without a doubt on the D.S.P. board, witch is the one with the optical jacks on it, The culprits would then be I.C. 719 & I.C. 720. This is a common problem with this model, and the sr6200 & 5200 as well. A low tech method to confirm this is to touch IC 720 (the smaller one) while it's on. If you can keep your fingertip on it for at least ten seconds, it's ok, and the problem is elsewhere. If not, (IT WILL BE VERY HOT) the the board must be removed (27 screws from left to right) and replace BOTH IC719 & IC720.

Posted on May 27, 2009

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2 Answers

How to find what is wrong with stereo amplifier that heats up but the transformer does not, and the fan doesn't go on, music was sporadic, now just not working?


Check for possible malfunction / heating of your amplifier power bank. Power transistor defective or leaky or else speaker terminal connections intermittent leading to disconnection of speaker load that heats up output power bank ( maybe power bank protection circuit if there not working )

Check the power bank and re-solder speaker connection / output terminals.Check for dry solders / loose connections in the power bank.

Run a thorough check on all solder leads !

Mar 23, 2015 | Audio Players & Recorders

5 Answers

TV Turns off automatically


your tv is having powersupply problem

smps might not be working properly check it

the power supply is not reaching the main board properly

give details about your tv - make and model number

Jul 04, 2008 | Televison & Video

1 Answer

Im trying to repair a Bx4500h. there is not output, the preamp sections works and the transformer works. I tested both. Im thinking its a problem with the 3080 IC underneath the amp board. Theres 2 cables...


Well, first off, if this is an IC output, depending on the rated watts per channel, you will certainly need a rail volt greater than + - 15V. That would be for a regulated voltage somewhere else in the amp.

Mar 07, 2015 | Audio Players & Recorders

2 Answers

My SC-HT650 system reads F61. I think I need a new transformer. Where do I find that?


Not the transformer. probably needs a voltage ic or output ic. F61 is a voltage error code. if it was the power tranformer it would not power up at all. It also could be just a bad fan. The fan should start as soon as you turn it on.

Jan 26, 2011 | Panasonic SC-HT650 System

1 Answer

MY RCA 27" WILL NOT TURN ON, HAVE POWER TO THE FUSE, THE FUSE IS GOOD ALSO BUT THE DEGAUSS RELAY DOES NOT CLICK AND NO OTHER CLICKS ARE HEARD EITHER, WHAT COULD BE WRONG?


you need to check the voltage output of your power supply section.This power supply supply is a switching type power supply.there is a chopper transformer in there.its supply is a dc voltage unlike any other transformer which is AC supplied on the primary..First step.
1.Using a multitester measure the primary supply it is a DC voltage around 220v - 110 VDC
2.Measure the secondary output.The out put is AC voltage the supply for the B+ going to plyback is 115vdc the second output is 12v run through a regulator and the regulator lower the voltage to 5vdc.this 5vdc supplies the system IC and the jungle IC.this ic process the switching of the plyback transformer and the plyback transformers output supplies the voltage of the whole system including your relay in the degaussing section....once the plyback is activated the tv will now turn on...

good luck!Hope i helped you..

please rate my help..god bless!

Jun 13, 2010 | RCA F27641BC 27" TV

2 Answers

What is the error POW 5 on a marantz sr 7500


I have a POW 5 failure on a marantz sr 7500. Anybody know how to fix?

Jun 02, 2009 | Marantz SR-7400 Receiver

2 Answers

Toshiba 57H81, power to transformer and flyback.


IF YOU REPLACED THE SAME PICO FUSE, YOU PROBABLY HAVE A BAD CONVERGENCE IC AGAIN . DID YOY SNUG UP THE IC TO THE HEAT SINK AND USE THERMAL HEAT COMPOUND ON THE NEW IC'S? ALSO CHECK SOLDER CONNECTIONS TO C810 AND C809 THE FUSE BY THE CAPACITORS MAY BE OPEN.

Jan 22, 2009 | Toshiba 57H81 57" Rear Projection...

2 Answers

Marantz sr7200


Most likley, if I'm right, you have heard some staitcy, crackly noises, accompanied with this failure. If so, the problem is without a doubt on the D.S.P. board, witch is the one with the optical jacks on it, The culprits would then be I.C. 719 & I.C. 720. This is a common problem with this model, and the sr6200 & 5200 as well. A low tech method to confirm this is to touch IC 720 (the smaller one) while it's on. If you can keep your fingertip on it for at least ten seconds, it's ok, and the problem is elsewhere. If not, (IT WILL BE VERY HOT) the the board must be removed (27 screws from left to right) and replace BOTH IC719 & IC720.

Dec 25, 2008 | Marantz SR-5000

4 Answers

Statics and hissing...


I also have the same fault, The static noise is coming out
of ic720 [ cs4391 or cs4392 ]on digi pcb which is D-A converter
this ic maybe faulty, i have ordered a replacement ic and will
post here if solves problem

Dec 10, 2007 | Marantz SR-5200 Receiver

2 Answers

No power


Check the FBT and the Horizontal Output Transistor also.

Sep 18, 2006 | Panasonic TX-15AT1 15" TV

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