Onkyo TX-NR809

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • nataf10
    Member
    • Mar 2012
    • 37
    • Israel
    #1

    Onkyo TX-NR809

    Hello friends.
    I have a ONKYO TX-NR809 Home Thea' .
    The unit go to protection mode immediately when I power the unit.The relay click can be heard and the fluorescent display lit for a second and then power go back to Stby mode.
    I checked all the output power transistors for any short circuit but all looks good,tried to disconnect other board to get the power turn on but NOTHING!
    Any idea/solution will be welcome.
    Thanks in advance
    Tags: None
    • ben7
      Capaholic
      • Jan 2011
      • 4059
      • USA
      #2
      Re: Onkyo TX-NR809

      Control circuits might have a short?

      BTW, the amp could have an open-circuit resistor. That might cause there to be DC on the speaker output. That would put the amp into protection right away...
      Muh-soggy-knee

        Comment

        • budm
          Badcaps Legend
          • Feb 2010
          • 40746
          • USA
          #3
          Re: Onkyo TX-NR809

          Check to see if it has more than 2vdc on the speaker relay contacts (the DC sensing for speaker protection is set to detect anything more than 2VDC).
          Never stop learning
          Basic LCD TV and Monitor troubleshooting guides.
          http://www.badcaps.net/forum/showthr...956#post305956

          Voltage Regulator (LDO) testing:
          http://www.badcaps.net/forum/showthr...999#post300999

          Inverter testing using old CFL:
          http://www.badcaps.net/forum/showthr...er+testing+cfl

          Tear down pictures : Hit the ">" Show Albums and stories" on the left side
          http://s807.photobucket.com/user/budm/library/

          TV Factory reset codes listing:
          http://www.badcaps.net/forum/showthread.php?t=24809

            Comment

            • nataf10
              Member
              • Mar 2012
              • 37
              • Israel
              #4
              Re: Onkyo TX-NR809

              Hi there,
              I checked the DC Voltage on the speakers output and find no DC Voltage.
              Do you have another tip?
              Thanks!

                Comment

                • ben7
                  Capaholic
                  • Jan 2011
                  • 4059
                  • USA
                  #5
                  Re: Onkyo TX-NR809

                  Originally posted by nataf10
                  Hi there,
                  I checked the DC Voltage on the speakers output and find no DC Voltage.
                  Do you have another tip?
                  Thanks!
                  Have you checked for shorts on the output of voltage regulators? Might just be a short, or failed voltage regulator.

                  Pic would help us point out where to check things

                  -Ben
                  Muh-soggy-knee

                    Comment

                    • budm
                      Badcaps Legend
                      • Feb 2010
                      • 40746
                      • USA
                      #6
                      Re: Onkyo TX-NR809

                      You need to check the DC at the relay input contacts (fed by the amplifier output), not at the speaker terminals since the relay is not activated.
                      Never stop learning
                      Basic LCD TV and Monitor troubleshooting guides.
                      http://www.badcaps.net/forum/showthr...956#post305956

                      Voltage Regulator (LDO) testing:
                      http://www.badcaps.net/forum/showthr...999#post300999

                      Inverter testing using old CFL:
                      http://www.badcaps.net/forum/showthr...er+testing+cfl

                      Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                      http://s807.photobucket.com/user/budm/library/

                      TV Factory reset codes listing:
                      http://www.badcaps.net/forum/showthread.php?t=24809

                        Comment

                        • ben7
                          Capaholic
                          • Jan 2011
                          • 4059
                          • USA
                          #7
                          Re: Onkyo TX-NR809

                          Originally posted by budm
                          You need to check the DC at the relay input contacts (fed by the amplifier output), not at the speaker terminals since the relay is not activated.
                          That's true!

                          I've seen some amps that short the speaker outputs when the relay is off. (so there is no chance of shorting the amplifier)
                          Muh-soggy-knee

                            Comment

                            Previous template Next

                            Related Topics

                            Collapse
                            • jm1234
                              9V relay temperature 40C
                              by jm1234
                              Hi, I'm seeing one 9V relay having temperature 40C on its 9V (primary) side. Does that seem right? I switched 2 relays on that board and the temperature was the same (on the same position), so I'm sure it's not a faulty relay. I measured voltage on that relay and it was 9.5V DC, so that looks good. I don't see any other relay on that board having that kind of temperature and they have 9V on them too.
                              I thought maybe the transistor that is switching this relay keeps switching on/off, so I also checked for AC and there was almost none: 0.3V using mV range. No steady frequency was shown, but...
                              05-09-2024, 03:03 AM
                            • edugimeno
                              Biomass Boiler not driving cleaner motor relay. ENERTRES BIOMASA BI-650
                              by edugimeno
                              Hi everyone!
                              I have this board that suddenly stopped supplying power to an output that drives an interchanger cleaner motor.
                              I checked while the board was in place with all wires attached and there's no AC voltage on the corresponding plug X5
                              This X5 is driven by fuse F8 (tested OK) which comes from the second orange relay
                              To make sure there are no charcoaled contacts inside the relay, I got a 24VDC power supply and got it ready to manually power up the coil side of these relays.
                              I respected the polarity, positive to cathode of protecting diode
                              So provided all...
                              04-18-2024, 01:15 PM
                            • sam_sam_sam
                              Mitsubishi CNC switching power supply board dead / relay board bad diode failure
                              by sam_sam_sam
                              I was working on this CNC machine today found no keyboard functioning no control relay powering on
                              The screen powered on and was giving an operation error but the manual was not very clear about what the error exactly was but with a little bit of troubleshooting and finding out that the control relays not powering on and no keyboard functions we narrowed down to this one switching power supply which of course does not have any indicator LED light they are on the keyboard interface/relay controller board

                              Found shorted diodes on main controller relays there are 3 of them that...
                              01-07-2023, 05:43 PM
                            • fadi90
                              PILZ PNOZ X4 Safety Relay
                              by fadi90
                              Hi everyone,

                              I'm working on repairing a Pilz PNOZ X4 safety relay module. When I opened it up, I found some of the connector pins detached from their pads. I replaced the connector with individual wires, but the issue remains.

                              The module is set to dual-channel mode with manual start. In this mode:
                              • Y36-Y37 and Y1-Y2 are bridged.
                              • 24VDC is applied across A1-A2.
                              • It monitors two emergency circuits (S11→S12 and S11→S52).
                              • When both are closed (24V present on S12 and S52) and the start button is pressed (S33 connected to S34), the NO contacts (13-14, 23-24, 33-34)
                              ...
                              X4 - Google Drive
                              https://drive.google.com
                              06-07-2025, 01:21 AM
                            • FrancescoV
                              Onkyo HT-R390 no sound output, video output ok
                              by FrancescoV
                              Good morning everyone,
                              I'm trying to repair an onkyo ht-r390 that has no sound output, despite the volume being at maximum, the rest seems to work; the video output signal (coming from an hdmi input) is present, but the audio is absent. Similar situation if I send an audio signal from any input I have no output.

                              The firmware reported is the following:
                              M:1.00/11107BLP
                              D:?.??/????????
                              O:1.00/11107AL

                              The DSP firmware given the question marks seems corrupt.

                              On the BCHDM-0678 - 25140678 - QPWBCHDM0678A0 board the chip that usually seems...
                              05-11-2025, 02:59 AM
                            • Loading...
                            • No more items.
                            Working...