Onkyo TX-NR363 Check SP Wire

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • ShotwellCoho
    New Member
    • Aug 2021
    • 2
    • NZ
    #1

    Onkyo TX-NR363 Check SP Wire

    Hey, I have an Onkyo TX-NR636 which briefly turns on, flashes check SP wire and then shuts down.

    I have followed this thread to troubleshoot https://www.badcaps.net/forum/showthread.php?t=42365

    However I have so far been unsuccessful - here is what i have done

    Found shorted main transistors on Right Channel, replaced both. Replaced some shorted 0.22ohm resistors for the same channel. Checked all components on vertical board (pre-amp i think) for this channel, replaced a bunch of resistors and a couple of transistors.

    Put everything back together, it blew the channel again.

    So, desoldered the main transistors for the right channel, plan was to start the amp, see that the Check SP wire goes away...it didn't, further more C5441 on the vertical board was still smoking with the main transistors out of the circuit.

    Remove C5441 and attached fly leads to read what voltage it is getting, reads ~110v....

    Hope someone can help me out here, I have run out of ideas/talent...
    Tags: None
    Previous template Next

    Related Topics

    Collapse
    • Francesc V.
      Onkyo A8200 - Not the right voltages in some transistors
      by Francesc V.
      Hi:

      I am trying to repair this amplifier that I've bought as faulty. I've found some transistors damaged, the ones where I am drawing a red circle.

      With the final transistors not yet installed (the expensive ones), I've started to measure some voltages:

      Where I am supposed to have 1.12V (base Q524/Q523) I am reading -42V..................both channels don't seem ok.
      Where I am supposed to have -1.12V (base Q526/Q525) I am reading -44V..................both channels don't seem ok.
      I removed and tested Q514,Q516 & Q513,Q515 but the analyzer...
      04-19-2025, 07:17 AM
    • Bogdan Kolybaba
      Dell AC adapter - 1 wire protocol. How to initiate to check if adapter works.
      by Bogdan Kolybaba
      Hi all. Trying to troubleshoot issues with the Dell Laptop power supply (a lot of info here). Now I am waiting for a DC power Jack, as there is a loose contact. Want to check if the ID line of the adapter works - I have given abt 3.2 V to this line through the voltage divider, but can't see any signal on the oscilloscope. Same with the 100500% working AC adapter as well. How to initiate 1-Wire protocol transmission? As I understand, the circuit in the AC adapter should send a package for a while as soon as the supply comes to the SPID line. How to initiate this transmission correctly without...
      02-20-2024, 07:41 PM
    • spleenharvester
      Reverse engineering of 18650 4-channel tester
      by spleenharvester
      Hi friends

      I have reverse engineered this tester, schematic is attached and is complete except for capacitor values. These testers annoyingly have no model number but they are the ones you find on the first page of just about any website if you type in "18650 4-channel tester". There is also a 2-channel variant and a newer 8-channel variant. They are very cheap (about £15) and can measure voltage, current, internal resistance and capacity. They have a multicolour display for all these statistics. They also have terminal blocks so that if you want to use a breakout board...
      05-04-2025, 02:43 AM
    • 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
      Tiny Tech ATX480W output power ticking
      by mikey5791
      Hi to all forum members,

      ​​​​​​This psu (Tiny Tech model ATX 480W) had been installed in a very old Windows XP PC but recently i pulled it out as the pc cannot start. To test it, i jumped the green wire and black wire on the 24 pin connector. The psu fan jerk a bit but not spinning. I used my dmm to check dc voltage on output connector wire, the 5v red wire keeps ticking a bit at around dc1v....then drops and ticking again around 1v. It is the same situation with the 12v yellow wire.

      Fyi, i desoldered the secondary side electrolytic cap those over 1000uf...
      02-20-2025, 01:11 AM
    • Loading...
    • No more items.
    Working...