Question about Technics SA-DX930 Receiver

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No Surround and Multiple Inputs Play at the Same Time

When trying to play a CD recently, I noticed that all my speakers were not playing (no surround effects, only the front left and right speakers, no center, no rear, no sub-woofer). I tried the different modes like Club, Theater, Live, etc. with no effect. When I switched the input source to the TV setting, I noticed that the TV sound started playing while the CD was still playing. I then switched the input source to the FM-tuner and all three started playing at the same time, no matter what source was selected. I have tried the reset/restore button on the front panel which seems to temporarily eliminate the multiple input playing, but does not restore all channels. There was a lightning /hail storm in my area recently, but no other components plugged into the same outlet including my television seem to have been affected. Any ideas for repair suggestions? I've really been impressed with the unit and hate to think about shelling out he bucks to buy a new one. I am tech-savy, but don't have schematics or any tech notes for this model. Thanks!

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  • Doug Logan Jun 05, 2007

    I fixed my own problem. After opening the cover, I discovered that there is a 120V 1A glass mini fuse on the underside of the power supply circuit board. This fuse was blown. It apparently feeds power to the amplifier and signal distribution circuit boards. Once replaced, the unit works perfectly again.

  • Doug Logan Jun 05, 2007

    I fixed my own problem. After opening the cover, I discovered that there is a 120V 1A glass mini fuse on the underside of the power supply circuit board. This fuse was blown. It apparently feeds power to the amplifier and signal distribution circuit boards. Once replaced, the unit works perfectly again.

  • fwilson Apr 20, 2008

    I have a similar problem, only my receiver has sound from the subwoofer, and the 2 rear speakers in surrond sound only. When I switch to stereo, I only have the subwoofer, no front or center speaker. I checked the fuses like 10forty2's suggested, and they checked out good. I located 4 fuses labeled f1, f3, f4, f5, but I could not locate f2. F1 was located on the circuit board at the bottom of the power supply, and f3-5 were located on the circuit board at the top. Any idea where the f2 fuse could be??

  • Anonymous Apr 24, 2008

    I have been using sony STR-DG810 good highs frecuencies but no quality bass thru hdmi connection w/ sony dvd up-1080i, Thanks to 10forty2 I fixed my thechnics and connected back with coaxial cable. Then the bass is real again for all movies…THANKS, THANKS SO MUCH TO 10forty2

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I have been using sony STR-DG810 good highs frecuencies but no quality bass thru hdmi connection w/ sony dvd up-1080i, Thanks to 10forty2 I fixed my thechnics and connect back with coaxial cable. Then the bass is real again for all movies…THANKS, THANKS YOU SO MUCH TO 10forty2

Posted on Apr 24, 2008

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Thank you so much!!!

That completely fixed mine!

Thank you thank you thank you!!!

Posted on Mar 10, 2008

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Thank you so much!

That completely fixed mine!

Thank you!!!

Posted on Mar 10, 2008

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