Logitech Z906 5.1 Surround Sound

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • m4a2t0t
    Badcaps Veteran
    • Mar 2013
    • 276
    • USA
    #1

    Logitech Z906 5.1 Surround Sound

    Having a issue with my speaker system. The control pod turns off and then back on after a few seconds to few minutes. If I push the power it turns back on and either stays on for a short time or turns back off. If I turn it off it will turn back on by itself after a few seconds to minutes.

    Visually I only see one issue. On the bottom of the power board there are some transistors or VRs (2nd picture) and it looks like it's covered in super glue. I cleaned all of that crap off and resoldered both pins but no change.

    I am testing with all cables disconnected except the AC power and the control pod. Also, sub disconnected from audio board. Control pod reset also performed. I've tried wiggling all the cables and tapping the control pod/sub but it doesn't cause it to immediately shut off or anything.

    When the unit shuts off I still have 3.3V on the keep alive pin on the audio boards connector j17. There is also a constant faint tapping noise coming from the PSU when it turns off. The one thing I did notice, and maybe it was coincidence, if I short a pair of speakers cables the unit shuts off and turns back on after a few seconds.

    Not sure where I should start looking. It could be one of the boards or even the control pod.

    Thanks for any help.
    Attached Files
    Tags: None
    • Moreno83
      Badcaps Legend
      • Jun 2014
      • 2008
      • The Netherlands
      #2
      Re: Logitech Z906 5.1 Surround Sound

      The glue could be the issue but you need to resolder some of these parts........

      It looks like bad connection on some of the solder pins.
      Last edited by Moreno83; 06-15-2018, 04:19 AM.
      I only repair Panasonic plasma tv's! Currently owning a TX-P55VT50 and still searching for a ZT60!

        Comment

        • m4a2t0t
          Badcaps Veteran
          • Mar 2013
          • 276
          • USA
          #3
          Re: Logitech Z906 5.1 Surround Sound

          What pins were you talking about that looked bad?

          I cleaned up the soldering around those Vregs or whatever they are.

          I noticed when I was taking the power supply out that the heatshrink was flaking off 2 resistors near the output connectors.

          Can anyone tell the resistance values from the pics? They both measure around 6 ohms.
          Attached Files

            Comment

            • R_J
              Badcaps Legend
              • Jun 2012
              • 9535
              • Canada
              #4
              Re: Logitech Z906 5.1 Surround Sound

              they likely run hot, thats normal, they could be 5.6 Ω, place your meter leads together to get your lead resistance and subtract that from what you measure the resistors value.
              I would just put them back in. You could try replacing those 2 small caps beside them (C30 & ??) being close to the resistors the likely dried out.
              Last edited by R_J; 06-15-2018, 03:57 PM.

                Comment

                Previous template Next

                Related Topics

                Collapse
                • paparazzo79
                  5,1 surround sound from TV to Logitech Z906
                  by paparazzo79
                  My friend wants to purchase this TV, Philips 55OLED805/12 and asked me if he will have surround sound over it's optical output to 5.1 Z906 setup from Logitech.
                  Now I have Z906,but I'm not so sure about that since these are PC speakers.
                  Hope someone knows, so he can purchase this TV.
                  12-30-2021, 11:57 AM
                • ChaosLegionnaire
                  what i went through dealing with my mobo with dead onboard sound!
                  by ChaosLegionnaire
                  so i took out one of my spare gigabyte ep35-ds3r mobos from storage for use to do some cpu, ram and video card testing of stuff i bought from ebay and got for free from momaka. he bought 50 e8400 cpus for cheap from ebay some years ago and i decided to help him relieve him of some of his supply since he had waaaay too many!! what did we say about hoarding too much stuff and depriving others of them?! *cough* socialism *cough* lol!

                  i had to blow some dust off the board and heatsinks with the datavac as i didnt clean it up before putting it in storage. after finishing...
                  09-13-2022, 09:02 AM
                • Dannyx
                  Logitech Z5500 No Sound (Bad control pod help)
                  by Dannyx
                  Good day folks. A former colleague of mine asked me to have a look at his prized Z5500 system which he's very fond of. He said it suddenly stopped working. He brought the sub and the console to our old shop where we use to hang out and the issue seems to be the console/pod. It turns on, the display works fine, the volume adjusts up and down, everything looks perfect but there's no sound at all on any of the channels, including the subwoofer. There IS sound coming out of the headphone jack though, so sound is making its way into the pod, but not into the sub where the amps are. The easiest way...
                  01-07-2020, 12:07 PM
                • LEECH666
                  Grundig Vision 9 37 9880 T USB (Chassis SR) TV Repair Help - Distorted Subwoofer Sound and overall weird sound waveforms
                  by LEECH666
                  Good day ladies and gentleman!

                  I am currently trying to repair a Grundig Vision 9 37 9880 T USB LCD TV for a friend that has a weird audio problem. Basically everything works fine except for the heavily distorted sound when the Subwoofer module is connected and there is a buzzing sound coming from the PSU PCB.

                  This seems to be a rather rare TV so there is not much prior on topic help to be found however a service manual is available at the usual sources (Electro Tanya i.e.).

                  I think the PSU buzzing comes from one of the coils near the bridge rectifier but...
                  01-19-2024, 05:46 PM
                • Christos Tsiligiannis
                  Marian Trace Alpha sound card repair help
                  by Christos Tsiligiannis
                  Hello to the forum.

                  My name is Christos, I am new to the forum here and i am posting from Greece.

                  So i have this old German sound card from Marian, called Trace Alpha. To be exact i have 2 of them and i use them professionally for my small FM radio station here. The first one works like a charm, but the second one does not work at all.

                  To be more specific in the same exact pc with windows 7 (i even tried 32bit) the one works while the other doesn't.

                  So i tried asking for a schematic from the company and they would not give me one. Instead they...
                  11-18-2024, 05:26 AM
                • Loading...
                • No more items.
                Working...