Question about Sony STR-GX900ES Receiver

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Sony STR-GX9ES We have a Sony STR-GX9ES. However, the FM channel range only goes from 76 to 90. Any suggestions how we can get the entire range of FM stations?

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5 Suggested Answers

  • 2 Answers

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Posted on Jan 02, 2017

  • 757 Answers

SOURCE: My Sony STR-DG600 Receiver constantly goes into Protect Mode when using FM or XM.

Check to see if the antenna is firmly connected and not making contact with the receiver chassis or other inputs/outputs.

Posted on May 09, 2009

  • 105 Answers

SOURCE: when iturn on my Sony STR-DE325 it goes into protect mode

Try disconnecting all of your speakers, and then turn on you unit. If you have a defective speaker, or a short in your wires, your unit will go into protect mode. If your unit seems ok with the speakers disconnected, then turn unit off, hook up one of the speaker leads and try it. This way you can isolate the problem.......

Good Luck,


Posted on Jul 09, 2009

  • 4234 Answers

SOURCE: i have a sony str-de335 fm stereo receiver and

This can be shorted output transistors (common) or a defective voltage amplifier IC. WIthout taking measurements inside, there is no way for me to make that determination. In any case, this should be a relatively simple repair for a shop that repairs audio gear. Expect a parts cost in the $25-$40 range.


Posted on Aug 19, 2009

  • 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 )


and usually paired with MP1620 ( Q754 )


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:

Posted on Feb 22, 2011

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Typically, but not always, you can hold down a specific key on the front faceplate and hold it down while turning on the power. This will usually ONLY restore the AM channels from 9Khz spacing to USA 10KHz channel spacing, but I don't think it will restore the FM band; I could be wrong - do a google search.. Usually the FM band is Japan is different than ours, and there are some expensive adapters to upconvert/downconvert US FM stations, but not worth the money to add, in my opinion you should just buy a new tuner like the Sony HD radio tuner!

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Can I assume the calibration procedure also didn't work for the Front left channel? (It's not a "surround" if it's in the front). Switch the receiver to Stereo mode to eliminate any DSP actions. Tune an FM station to eliminate any external device or cable issues. What do you hear from the two Front speakers?

OK? Select a DSP surround mode. Check all modes. What happens?

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It was a bad left channel cable somewhere, wasn't it?

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If your going to buy an antenna you could do some research at They might be able to help you with the other problem too.

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Manually tuning the reciever

you should be able to tune in manually.
press tune
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another thing to look into would be getting a yagi fm antenna, they are directional and although you may have to rotate it for best results, they work great.

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