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Limit volume at sony str-de197 - Sony STR-DE597 Receiver

Posted by dstimac260 on

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Rod

  • 19 Answers

SOURCE: Hello, I need help with my sony str-de197

It sounds like the switch might be OK mechanically but not electrically. Have a look to see if you can check the connections on the switch. Perhaps there is a broken or loose or bad solder joint.

Posted on Oct 30, 2009

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Anonymous

  • 5807 Answers

SOURCE: Sony STR-DE197 AM-FM Receiver. Has

Inside the Receiver there are electronic components mounted on the aluminum

heatsink ( Audio Output Power Transistors )



it may looks like these :



MN2488 ( Q753 )


palaboy_78.jpg



and usually paired with MP1620 ( Q754 )


palaboy_79.jpg



You may have to check on those two pairs of power transistors

and replace in pairs.


( which means if any of the two is bad , have them both replaced )




Check also the audio signal on the right channel input , if it

is on the same level of those of the left channel.



These components are available at:

http://www.mcmelectronics.com/product/DISTRIBUTED-BY-MCM-/MN2488

Posted on Feb 22, 2011

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2answers

Unit won't turn on. There's power to the outlet but the reciever just won't light up! Sony STR-DE 197 It's only a couple of years old and shows no damage.

Failure of the the power source. To see if it's fixable the receiver will have to be opened and the power board tested . This job requires at least a basic experience in electronics - if you don't posses it all you can do is to look for a burned fuse or damaged capacitors. For them follow this
http://www.youtube.com/watch?v=YCSNWi3UHf4
0helpful
1answer

The protect light comes on and cuts sounds

There is a short or an overload. Check the speaker connections, and if there is a defective speaker. If the speakers are okay, there may be a failure in the amplifier circuits. This will require shop service if it is an internal problem.
Jerry G.
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1answer

Hello, I need help with my sony str-de197 receiver. Then I hit power on button, there is a click sound inside the box, but nothing happens, there is nothing on display too. I have checked 2 fuse's, it's...

It sounds like the switch might be OK mechanically but not electrically. Have a look to see if you can check the connections on the switch. Perhaps there is a broken or loose or bad solder joint.
0helpful
1answer

Protect appears with power on

This has happened on my receiver but it goes away if I switch it off and turn it back on again.
1helpful
1answer

Protect comes after pressing power button

check the connections on the back , specially the speaker wires , make sure the strands are not crossing each other causing the PROTECT SIGN , hope it helps , AJ
2helpful
1answer

Sony STR DE 197 Reciever with No Sound

I have the same unit. My best recommendation would be to remove all speaker wiring, and try new wiring with another pr of speakers,since the "outdoor " speakers were rained on. the protect mode that the unit went into sounds like it did because the speaker outputs were shorted due to the rain, so ensure that the speaker output terminals are not shorted and dry...also see if output is still availalable at the headphone jack...if it is, the pre-amp section is still good , in which case the protect mode and no volume output out of the speaker jacks may mean that youve blown the ouput trasnsistor finals.
I hope this helps.

bobbymaximus
0helpful
1answer

Sony receiver does not change components

Check to be sure that none of the buttons are stuck on. With the unit off, press each of the buttons. You should be able to feel the button engage. If they all feel like they are working, the internal switch itself may be shorted in the closed position.

Update this with what you find.

Dan
2helpful
1answer

Need help

Have you connected an extra pair of speakers?. (Thereby loading the amp stage beyond it's capacity)
Are the speakers connected to the unit the original ones the system came with or different? ( Speaker impedance, usually displayed at the back of the speaker cabinet must not be less than amp's specifications....6 ohms, 8 ohms)
If you're driving the unit excessively you're lucky this piece is equipped with protect mode, else your speakers and amp would have been fried by now.
One last possibility comes to mind: High volume causes vibration causing loosely fitted mains plug to rattle in wall socket calling "protect" due to improper feed voltage. Move the unit to another wall socket and ensure a tight fit into mains receptacle.
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