Question about Sony STR-DE945 Receiver

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Sony Str-DE945 5.1 not Powering Up all !

Will not power up at all .... was working fine. Power cord okay at both ends. All 5 fuses near power supply okay. Ac plug in in back of unit also not getting ac...

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  • lrhillcountr Nov 17, 2008

    I really appreciate the quick response. Problem is that my Sony Receiver will not power up at all ... completely dead! Possibly power supply, but don't really know ... will have to have it checked out, but cost is very high ... just for a check up!

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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.

Posted on Nov 17, 2008

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What would cause new fuse to blow when powering on (Sony STR-DN1030 Receiver).


Look in the circuit board area where the power cord mates with it for capacitors that have bulging tops (instead of the flat tops that are normal). If you see even one, you need to replace all the large capacitors othe power supply section (normally around 5 or 6).

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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.

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No Display, no sound- not working, showing dead. But input Power is ok. Picture tube filamment not getting power. model sony KV-2192M3


Hello
Check the input fuse first. If it is blown, there will be some short inside the power regulator circuit. Usually Sony sets uses STR regulated power supply. You can see this STR, and Ic, screwed onto a heatsink. Replace it with a same type and number. Before replacing the STR, check the diodes used in that section for damage, mainlu zener diodes. They might get shorted along the blowing of the STR. Check that section throughly before resoldering the new STR.
If any further assistance you needs, get me through Fixya. Ok.

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1 Answer

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Hi,
This problem is very common in this model the solution is to replace the fuse with improved one 10A 125V of type CES710A having part No.1-576-695-11. Remember that this fuse would be larger in size of earlier one so that you have to drill it first in the holder and adjust the fuse to a proper space of 1.4 drill bit.
Do the changes and your product work fine.
Thanks.

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Sony str-de845 Powers up, relay clicks, fuses BLOW!


This condition, may be produced by defective components (Q506, Q507). you can remove those transistor, replace the fuses, power-on and wait for relays click. if the fuses not blown again, them replace both transistor.

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Loud buzzing at the first volume setting


Check all your wires and make sure that none of the wires that are powering any equipment (including extension cords, power bars, and power cables on the unit itself) are running parallel to any of the audio cables going to your speakers or from your inputs to your unit. This could be what's called AC hum, which is caused when the electrical current causes interference that gets picked up by the audio cables and amplified by your system. Just make sure you move the power cords as far away as possible from the audio cables.

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Unit has a problem in power supply or output circuits. Take in for service

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2 Answers

Not powering on


remove all external devices and speakers
the clicking is the auto protection.

Dec 08, 2007 | Sony STR-DA9000ES Receiver

1 Answer

No output on main speakers


I have experienced a similar problem with my Sony STR-GX57ES and took it to a certified tech only to find it needed the power supply replaced. I opted to hunt down a compatible power supply but have been unsucessful thus far. That being said I picked up an STR-D665 for next to nothing and found the power supplies to be quite different (you would hope so any, with the ES meaning Elivated Standard and all) but with the D665 working flawlessly I'd rather have something working than nothing. Good luck!

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