Intimidation Professional sub advice please

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • zen
    Badcaps Veteran
    • Apr 2011
    • 511

    #1

    Intimidation Professional sub advice please

    Hi all

    Far as i can tell this unit not producing any audio , although customer mentioned it does , but distorted .

    Anyway , started by testing impedance of main driver speaker .


    Measuring 80R , which i have not experienced before .


    Anyone familiar with this unit enough to know ?


    Can't seem to find any info on it .

    See picture of label on speaker .
    Attached Files
  • R_J
    Badcaps Legend
    • Jun 2012
    • 9535
    • Canada

    #2
    Re: Intimidation Professional sub advice please

    Most of the Blastking drivers seem to be 8Ω

    Comment

    • zen
      Badcaps Veteran
      • Apr 2011
      • 511

      #3
      Re: Intimidation Professional sub advice please

      Thanks RJ for confirming .

      Will test with another driver & report back

      Comment

      • zen
        Badcaps Veteran
        • Apr 2011
        • 511

        #4
        Re: Intimidation Professional sub advice please

        Tried one of my chunky 4 ohm speakers on this unit , but still no audio .

        Comment

        • zen
          Badcaps Veteran
          • Apr 2011
          • 511

          #5
          Re: Intimidation Professional sub advice please

          Have a feeling there's an issue on the input board .

          Became suspicious when i noticed the LED for signal wasn't registering .

          Also cannot scope any audio on ribbon lead from input PCB to MAIN , although if i poke around on main , can measure an extremely low peak to peak audio signal.

          Comment

          • zen
            Badcaps Veteran
            • Apr 2011
            • 511

            #6
            Re: Intimidation Professional sub advice please

            Some progress made on this unit .

            Discovered a low reading of 30R between pins 15 & 13 of U15 ( IRS2092S ) , compared to same measurement on other channel , which was over 4K .

            It's a drive chip for one of the channel output devices , which seemed to have survived .

            Surprised protection mode didn't kick in .

            Still not sure about the speaker impedance .
            Attached Files

            Comment

            • R_J
              Badcaps Legend
              • Jun 2012
              • 9535
              • Canada

              #7
              Re: Intimidation Professional sub advice please

              There likely is no protection circuit. I suspect the output mosfets could also be bad, I see what looks like a lead trimming or solder splash on the mosfet lead in the lower left of your picture.

              Comment

              • zen
                Badcaps Veteran
                • Apr 2011
                • 511

                #8
                Re: Intimidation Professional sub advice please

                Hi RJ , there is an LED on unit labelled protection .

                I did notice the solder splash also , but suspect that's during manufacture , as it doesn't seem unit has been opened before .

                Comment

                • zen
                  Badcaps Veteran
                  • Apr 2011
                  • 511

                  #9
                  Re: Intimidation Professional sub advice please

                  Pulled out the driver , which has a larger diameter than any pizza i have ever seen , 47 CM in fact .

                  Now impedance reading 1R2 therefore assume it has shorted turns .

                  I guess it should be a 4 ohm .

                  Not sure why the high reading before . Quite possibly meter probes not contacting fully .

                  Any suggestions for a replacement .
                  Attached Files

                  Comment

                  • zen
                    Badcaps Veteran
                    • Apr 2011
                    • 511

                    #10
                    Re: Intimidation Professional sub advice please

                    With the added cost of bass driver customer has decided against repairing .

                    Not having a particularly fruitful week .

                    Comment

                    Related Topics

                    Collapse

                    • zen
                      PS48 Bose sub & head unit schematic / advice please.
                      by zen
                      PS48 is model for sub & where i suspect issue lies .

                      CD head unit seems to run ok , & can take a line out signal into an amp with audio present .

                      Can't seem to measure any voltages at secondary side of PSU within SUB unit ....
                      07-08-2022, 07:53 AM
                    • ngml
                      Repair of an LG split AC system indoor unit PCB
                      by ngml
                      I am trying to repair an LG split AC indoor unit, which does not start and gives a CH05 error code.
                      This indicates an error in the communication between the outdoor and the indoor unit.
                      The outdoor unit is fine, so the problem is the indoor PCB.
                      The indoor unit is an LG PC09SQ NSJ (3SNM09JA2FA), and the PCB has the following type number: EAX35907219-1.2 (see photo1)
                      I changed optocouplers ICO1X & ICO2X and the NPN transistor S9013 which drives optocoupler ICO2X (see photo2), but this did not remedy the fault.

                      Does anybody have the schematics of this board,...
                      02-01-2025, 12:55 PM
                    • nobbnobb1
                      Bose Companion 5 - Unit Powers On then Cuts Off Shortly After
                      by nobbnobb1
                      Hi guys,

                      Trying to salvage a Bose Companion 5 computer speaker system that powers off shortly after powering on. It's got a primary USB input (built in DAC) and an aux 3.5mm input. The USB appears to be the primarily source that tells the unit to power on (control pod LED goes green) as the unit has no power switch.

                      When I first connect power to the unit, plug in the USB, it will play audio nicely for a minute before it drops out and the unit appears to go into standby (control pod LED goes red). It stays in standby and I cannot seem to power it back on without physically...
                      02-03-2022, 11:14 AM
                    • Gjackson
                      Air-conditioning unit power supply failing to power up
                      by Gjackson
                      Hi all, I managed to narrow down which PCB was causing my Haier AC to throw out an E7 error code (E7 indicates that the indoor unit and outdoor unit cannot communicate). I found that the outdoor unit power board which gives 5v and 15v to the outdoor unit module board fails to fully power up.. The power Led starts to fade in incredibly slowly and the 5v and 15v power buses jump around like crazy and never reach their required voltage. I unplugged the module board from the power board and the power board powered up fine! It had a steady 5v and 15v out and the power LED came on instantly and Bright....
                      01-08-2022, 09:24 AM
                    • navagator
                      Hitachi Power Supply Unit Interchangeability
                      by navagator
                      I have a Hitachi 57F710E rear projection set with a bad power supply board. I've tried to fix it with help from this forum as well as another one, but without success. Today I found a Hitachi rear projection set for sale on Facebook that looked just like mine. After contacting the seller I found out it was a 51F510. According to the service manuals my set uses a HA01312, POWER UNIT DP4X-DM_24W and the 51F510 uses a HA01313, U901, POWER UNIT DP4X_24W.

                      Does anyone know if these 2 power supply boards are interchangeable?

                      Thanks.
                      01-08-2024, 07:53 PM
                    • Loading...
                    • No more items.
                    Working...