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Where is the output transistor on a SONY STR D790

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  • 2 Answers

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Posted on Jan 02, 2017

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welcomejee
  • 10594 Answers

SOURCE: Sony STR-DE525 Protector mode

Hi,
Download service manual of STR-DE525 here and fix your receiver.
Must download all 4 files at web site.
Need further help, let me know.

Posted on Sep 24, 2008

Testimonial: "Thank you for the print. amp is back in working order!"

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SOURCE: Question about Sony STR-DE595

NO! It uses the same amps for a and b channels. and you could short it out if its wirer improperly.

Posted on Dec 17, 2009

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1 Answer

No display can you help


If the display turns on when you push on the front panel, then you most likely have bad solder connections on the display tube. These will need to be re-soldered.

Dec 29, 2015 | Sony STR-D790

1 Answer

SONY RECEIVER MODEL STR - D315 keeps blowing a fuse


When the main fuse blows on a sony, it is usually caused by shorted output transistors. You would have to replace these transistors before the unit will not blow the fuse and power up correctly.

May 23, 2013 | Audio Players & Recorders

1 Answer

Sony STR-DG910 is in protect mode how do i solve this?


Most likely it needs repair of one of the output channels. Pair of transistors and a couple of resistors probably.

Jan 31, 2011 | Sony STR-DG910

1 Answer

I have a sony STR-de135 receiver whlie looking for one problem created another.While the receiver was unpluged I touched and output transistor MN2488 and it sparked now the left channel sounds distorted so...


The capicitors in the unit are charged. Replacing the output transistor(s) is not a task for a novist. Capicitors, resistors, driver transistors and sometime preamp chips can also be bad as well. If all the bad components are not replaced the parts you replace could blow out again.

Jun 19, 2010 | Sony STR-DE135 Receiver

1 Answer

My STR-DE835 receiver will not stay powered on


Most likely bad output transistors and a couple of resistors. mp1620 and mn2488 are the part #s for the transistors. If you take it to a repair shop you are looking at spending $100-$130

Nov 16, 2009 | Sony STR-DE835 Receiver

1 Answer

Sony str-DE435 Flash Protector


this is not a reset problem, you have a defective audio output, is either the outputs transistors or the drivers IC's ( integrated circuit) and sometimes if you are lucky is just loose connections on the drivers IC;s.
good luck

Jun 18, 2009 | Sony STR-DE435 Receiver

1 Answer

Hi, on my Sony STR-DE935, Fuse #801 keeps blowing.Is it caused by a shorted bridge rectifier or one of the voltagr regulators, or am I looking in the wrong direction? Thanks, Ed Knight


Ed,

It could be one of those but most likely it is a set of shorted output transistors. MP1620 MN2488 in most sony receivers.

Feb 22, 2009 | Sony STR-DE935

1 Answer

Wiz sony


The receiver has detected a problem in the final output stage and has shutdown to prevent further damage to either the amp or the speakers. The most common cause of this is shorted output transistors. Figure about $15-$30 for parts plus the local labor rate.
Dan

Apr 08, 2008 | Sony STR-DA90ESG

1 Answer

Sound turns off for Sony STR-DE875 amp


If you do not here a click as soon as the power is turned on, (note you must be in a very quite environment no noise absolutely to hear this) then the amplifier has blown output transistors which are pushing DC current to the speakers.

Aug 31, 2007 | Sony STR-DE875 Receiver

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