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Amp will not turn on [fuse okay] - Audio Players & Recorders

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MY AMP WILL TURN ON BUT MAKES A BIG SQUELCH NOISE WHEN IS TURNED ON

Posted on Jan 10, 2010

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Posted on Jan 02, 2017

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I plugged my marantz sr 8002 into 220 volts


  • There are a total of 8 fuses of varying types, wattage, and amperage ratings.
  • Disconnect the power cord to your surround receiver and let it sit for a while; hopefully capacitor drain will have occurred; just the same be careful not to contact any of the high voltage ones. They can knock you on your boom-boom or send you to the Pearly Gates before it's your time.
  • Remove the casement cover; look for the Printed Wiring Board (PWB) labeled REG_PWB...this is the regulator printed wiring board.
  • Following the circuitry from the main transformer there are 2 (two) fuses; one is located at position number F901 and the other at F902. Both are Time Lag 382 series radial lead fuses made by LITTLE FUSE. And both are 5-amp 250volt rated fuses- check for continuity using an Ohmmeter with tone. If you get tone, the are okay. If not, you'll have to de-solder them and solder in new one(s)
  • On the same board, there are 2 (two) fuse resistors rated at 0.33 Ohms, 1 watt; check their resistance values using the Ohmmeter scale. You will find their position markings at R903 and R904 on the PWB. If your resistant readings are below the spec values, you'll have to replace them.
  • The remaining fuses will be found on the PWB labeled, Standby PWB A. Check them using the continuity tester with tone.
  • Between position markings F701 and F703 the schematic shows a 10-amp/250 volt fuse
  • At position marking 701 there is a time lag series 6.3-amp/250 volt fuse.
  • At position marking F702 and F703 are 2 more fuses, both are the T382 "Little Fuse" series fuses rated at 3.15-amps/250 volt.
I believe that covers it...hope all works out well. :)

Mar 25, 2015 | Marantz SR8002 7.1 Channels Receiver

1 Answer

My optimus receiver is getting power but won't turn on


Glad you have made it!! , thanks for choosing Fixya for assistance.

Aug 30, 2012 | Audio Players & Recorders

1 Answer

Hi I have a str-dh520 reciever that has a 8 amp 125 volt fuse that blew and I could only find a 8amp 250 volt fuse and when I installed it it blew right away. What do I do now? Dose it have to be a 125...


No! the fuse you replaced was fine, the power transformer may be shorted, or the audio ouput semiconductors are shorted, check the speaker wires for shorts, if okay! I recommend a pro with a estimate.

Mar 19, 2012 | Sony Audio Players & Recorders

1 Answer

Blown? all sound is distorted. Upon exiting the auto speaker calibration mode, I hit the video input from my tv and got a BLAST of static, volume set itself to 54... now everything is distorted. speakers...


No product information being given for either the (amp?) or the TV we can only guess. You should look at the manuals first to make sure your TV's audio isn't a digital bitstream fed into an analog input.

Bad fuse?? A blown fuse will result in silence.

May 26, 2011 | Audio Players & Recorders

1 Answer

I have a Onkyo HT-R8230, i hooked it up to my jvc XL-V114 disk player via rca and the receiver will play for about 2 mins then shut off the stand by light blinks i pulled it apart and dusted it out checked...


Check the link below for generic information about protect mode as your unit is in that mode. In your specific case, I'd suspect a problem with the coupling caps between the pre-amp stage and the final output stage of the amplifier. There could also be a power supply offset problem. Without taking measurements inside the system, I can't say for sure.

Check out the link and post any additional questions here.

Thanks,
Dan


Link: http://www.fixya.com/support/r5390728-protector_means

Sep 02, 2010 | Audio Players & Recorders

1 Answer

Transformer has a shortage. when cutting on turns right back off.


Normnaly the problem is in the protect circuit for the amp stage.if unit has a standyby lite then transformer usally okay. check output transistors for shorts.

Apr 12, 2010 | Audio Players & Recorders

1 Answer

My str-k502p stopped showing the lights on the front. everytime i plug it in it makes the clicking sound like its on but nothing shows up. when i try pressing the power button all that happens is the...


Check fuses on unit .Fuses should be on right side of amp .If all fuses are okay.If a fuse needs replacement .Replace with same type and always make sure unit is unplugged .Its possible unit needs repair

Jul 20, 2009 | Sony Audio Players & Recorders

3 Answers

No sound


Have you got the speakers on as in the AorB speakers button? It should be located on the front of the amp.

Dec 30, 2008 | Sony STR-DE898 Receiver

1 Answer

Sony Str-DE945 5.1 not Powering Up all !


It's possible there are several bad solder joints on the front panel PC Board which can cause non responding controls, loss of sound. I repaired mine that way. Try turning it on with remote, see if that works.

Oct 21, 2008 | Sony STR-DE945 Receiver

1 Answer

Kenwood KR V8080 receiver


if you sent 110v down the speaker wires & into the amp you most likely have damaged the audio outputs or the output ic. Look for a big aluminum heatsing & on one side you may find 1 or 2 ic's or numerous transistors, the ic's are hard to check, the transistors are easier to check, if transistors replace in pairs. also check for burnt /open resistors near outputs

Aug 18, 2006 | Kenwood KR-V8080 Receiver

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