Marantz PM-66SE Burns Transistors

Collapse
X
Collapse
 
  • Page of 3
  • Time
  • Show
Clear All
new posts
Previous 1 2 3 template Next
  • eccerr0r
    Solder Sloth
    • Nov 2012
    • 8701
    • USA
    #41
    Re: Marantz PM-66SE Burns Transistors

    Also would like to note, I once was debugging an old scope and found an IIRC also 10KΩ ⅛W resistor. It looked great from the outside, but it turned out to be flaky and realistically, broken: If I touched it one way, the scope started working, if I touched it another way, the scope broke.

    I was lazy and touched it so that it would work (since I'd have to remove the huge board to replace it) and left it for repair another day, enjoying the scope while it works.

      Comment

      Previous 1 2 3 template Next

      Related Topics

      Collapse
      • acedogblast
        [Marantz SR5012] Center channel keeps going into ASO/Overcurrent protection.
        by acedogblast
        First off I would like to thank this community as it has provided me with great information that has helped me greatly on my repair for this Marantz SR5012 AV receiver. I am creating this new thread as the other 2 that I have created here has had their original question/problem solved and I plan that this is the final thread on my repair. Please note that this is my first time repairing audio amplifiers so I may not be aware of common issues and things to know.

        Lets start at what I have done so far. Random speaker popping on all channels is fixed by replacing the 2 large filter...
        03-01-2023, 08:24 PM
      • Daniel Larsson
        Marantz SR7500 burning output transistors - so far 2 channels are gone. Help!
        by Daniel Larsson
        Hi all,

        Will start with the question and the full story follows below.

        Can someone please let me know what voltage I should see per pin on the protection circut IC81, TA7317P?
        My voltages per pin with the IC removed, only measuring on the soldering pads now, are:

        1 -0.39
        2 0.0
        3 0.0
        4 0.0
        5 -12.5
        6 11.94
        7 0.0
        8 11.74
        9 11.74

        The full story is that my Marantz SR7500 shut down a couple of days ago stating "CHECK POW5".
        I checked the service manual to find out that the...
        2 Photos
        05-30-2025, 11:39 AM
      • mikey5791
        Need help to replace burned resistor in 350w atx psu
        by mikey5791
        Hi to all forum members,

        Got this faulty 350 watt atx psu dirt cheap from a local online seller as i am keen to use it as a learning tool to repair faulty power supply.
        The faulty part is quite obvious from the burn area near the 16pin KA7500 BD pwm. The fuse is still intact with good continuity.

        Upon power on ac, there is 5vdc standby power on cathode of diode D14 and about 10vdc on cathode of diode D13.(This should be the aux power to generate the 12v and 5v rail.)
        Initially i replace the two burned resistors near my marked red arrow to 200 ohm resistor...
        12-26-2024, 04:55 AM
      • karatzdi
        Denon AVR 1908, High pitch noise on Surround back Left channel after long overhaul
        by karatzdi
        Hello,

        I know some might say... just buy another one. Sell it as parts..!

        So had this AMP for quite some time. Recently I saw light smoke coming out of the AMP. Had my fire extinguisher close by. Just kidding. Turned immediately all devices off from mains.
        Let things cool a bit, and opened up the amp device. I clearly saw on the main board which hosts the 5X amp (5.1), 3 10 ohms 1W resistors had their leads looking black, while the rest of the remaining 2 x 10 ohms were brownish as being installed from factory.

        Spent some time downloading the Service...
        06-11-2024, 08:38 AM
      • MrCommunistGen
        Polk Audio RTi100 Plate Amplifier won't power on and intermittently honks and buzzes
        by MrCommunistGen
        My childhood best friend was killed about 9 years ago. His parents are finally letting go of his things, and they offered me his Polk RTi100 tower speakers. The Polk RTi100 towers are one of a handful of designs from the early 2000s that is a full range 3-way tower with a built-in self-powered subwoofer. This is accomplished with a plate amp integrated into the speaker input panel.

        I think they used them for a while, but they've been sitting for at least a few years now. After about 40 hours of driving to their house and back (both they and I have moved in the last 9 years) I got...
        07-12-2021, 05:11 PM
      • Loading...
      • No more items.
      Working...