Yamaha RX-V359 troubleshooting, turns on and off

Collapse
X
Collapse
 
  • Page of 2
  • Time
  • Show
Clear All
new posts
Previous 1 2 template Next
  • Jooo
    Badcaps Veteran
    • Oct 2011
    • 222
    • Finland
    #21
    Re: Yamaha RX-V359 troubleshooting, turns on and off

    Originally posted by Longbow
    A faulty Q109 accounts for the missing -49 volts. A missing 1.2 volts on pin 8 might be caused by missing +48 from Q108/R133. Q106 serves as the 1.2 volt regulator.
    Thank you for your message.

    R133 was ok.
    Q108 and Q109 (2SB1274) are same parts, I ordered two yesterday and will replace both.
    I ordered Q106 (2SA949) too just in case, not expensive so might aswell replace it while I'm at it.
    Last edited by Jooo; 10-17-2013, 12:21 PM.

      Comment

      • Longbow
        Badcaps Veteran
        • Jun 2011
        • 623
        • USA
        #22
        Re: Yamaha RX-V359 troubleshooting, turns on and off

        Originally posted by Jooo
        Thank you for your message.

        R133 was ok.
        Q108 and Q109 (2SB1274) are same parts, I ordered two yesterday and will replace both.
        I ordered Q106 (2SA949) too just in case, not expensive so might aswell replace it while I'm at it.
        A simple diode test with a multimeter would have confirmed if any of those transistors needed to be replaced. Most often you won't have to pull them out either.
        Is it plugged in?

          Comment

          • Jooo
            Badcaps Veteran
            • Oct 2011
            • 222
            • Finland
            #23
            Re: Yamaha RX-V359 troubleshooting, turns on and off

            Yes I did know that, Q109 was bad and R144 10ohm resistor just before Q109 measures megaohms.
            Since there was minimum order limit and I didnt really need anything else, I thought it wont hurt to replace some of the other parts too.
            Still waiting for them, should arrive this week.
            Last edited by Jooo; 10-21-2013, 03:58 PM.

              Comment

              • Jooo
                Badcaps Veteran
                • Oct 2011
                • 222
                • Finland
                #24
                Re: Yamaha RX-V359 troubleshooting, turns on and off

                I replaced the parts listed, and I have good news, but also bad news.

                Good news: It's alive!
                I tested it for a few minutes on FM and it seems to work just as it should. I didn't test it longer because I didn't want to make it worse than it already is, because:

                The bad news: Although it does not shut down now, I checked the diagnostics mode. Sure enough, there still seems to be something wrong: DC PRT value has gone up to 75 percent...

                What could be causing this or is it normal that the DC PRT value is so high? Why it does not shut down to protect itself? Is it safe to use?

                  Comment

                  • Longbow
                    Badcaps Veteran
                    • Jun 2011
                    • 623
                    • USA
                    #25
                    Re: Yamaha RX-V359 troubleshooting, turns on and off

                    Why not check the d.c. at the output terminals? The error codes in the unit might remain in history until they are cleared - that's just a guess.
                    Is it plugged in?

                      Comment

                      Previous 1 2 template Next

                      Related Topics

                      Collapse
                      • Sinnyone
                        Yamaha RX-V3900 dim display and turns off
                        by Sinnyone
                        Hi all,
                        This is a repost since I never completed this fix. I just left it, but now the receiver powers off into safe mode and does not complete the Self-Diagnostic when i start with those buttons pushed. It says it is, but does not do the diagnostics and does not show any faults or that it has none, which it should do. So here i am again. The previous post did have a schematic but I think it was cut off somewhere. I do not know what board it is referring to. Any help would be appreciated.

                        I have searched through the forums and have not found anything about my problem. So,...
                        08-30-2023, 08:35 AM
                      • roadrash
                        Yamaha HTA-5630RDS Amplifier dead
                        by roadrash
                        Belongs to my son and he just says it stopped turning on. Any help greatly appreciated. Theres 240v in and fuse is ok but no power anywhere else.
                        5 Photos
                        12-12-2024, 10:19 AM
                      • Stephen
                        MacBook Pro 14" M1 Pro Turns on functions then turns off when I plug in USB C cable
                        by Stephen
                        MacBook Pro 14" M1 Pro Turns on functions then turns off when I plug in USB C cable to reset the computer. I disconnect the battery fully and then reconnect it and it won't turn back on. After letting it sit for a day I plug the battery back up, and the MagSafe 3 cable and it powers on and stays ons, once I plug in a USB C cable into the port closes to the MagSafe port it turns off and the Amber light turns off and won't turn on. No water damage, nothing, I want to do a DFU restore to wipe the computer since the customer stated they did an update and ever since it just decided to not work...
                        03-15-2024, 09:37 AM
                      • www
                        LG L192WS-BN backlight turns off after 1 second
                        by www
                        I am testing an old LG L192WS-BN monitor I have that gives an image, but has a backlight issue. When you turn it on the backlight turns on 1 second and it turns off, turns on again, 1 second and it turns off and stays off. Using a flashlight I can see there's still an image.

                        I replaced a bulged cap on the main board, but made no difference. I also got another exact same model monitor that has a broken ccfl (the connector got ripped from the panel and the main screen connector is also broken so I can't use this panel to test), tried using the main board from this one, same issue....
                        03-24-2024, 05:26 PM
                      • jul2711
                        Yamaha YPG-625 No Power troubleshooting
                        by jul2711
                        Hi,

                        I have this keyboard that I am working on that doesn't power on when connected to voltage. Upon looking at the schematics I believe that the issue is with the power supply circuitry (schematic screenshot and pdf attached). I have poked around the circuit from the DC in jack and for some reason, the two 5v regulators only seem to get around 0.5v in and 0v out. I have tried jumping the power connector to simulate the on switch, but no dice and I get the same readings on the regulators. The fuse is fine and will beep in diode mode. Nothing looks obviously bad or scorched.
                        ...
                        05-29-2023, 02:43 PM
                      • Loading...
                      • No more items.
                      Working...