Hi hirscwi!
And you are right
I just checked and I have 4x10/25 and 2x33/25. C703 is a blue and round as a bubble that seems to need replacement as it looks blooby
Thanks so much you saved me from a mistake!!
The title of my thread is : Marantz 2325 protection relay engages after 30 minutes of play.
I can resume it for you:
My Marantz 2325 stops +/- 30 minutes after being turned on, the protection circuit's Relay triggers.
With the help of a friend, via emails, I have managed to isolate the issue to the Right power amp
- unplugged each one while using main amp input. Both amps it stops, left amp it does not stop. right amp was on alone, it stopped
The protection relay triggers after about 30 minutes of playing
I have tested all the big transistors on the heat sinks, all fine
voltage changes drastically as it is warming up, in the right output (left one stayed at +/- 280mv) By the time I joined the pic and writing this, the right channel is already over 1.000 mv and still going up... I swapped the 2 DMM and still got same readings, right output way up, left output stable at 280mv...
I have measured DC, Adjust with No Volume/load for 0vDC @ Pot #R713. I did adjust to zero but started to go up after a few minutes, like before. So the pot works but the issue still persist.
- So with all advices from members here I :
- Recap electrolytics (P700 and P800 boards) + relay
- Change the H701-702 transistors I did HFE match them as recommended by you guys I also changed the H703 as I saw it on this thread since I had some spears from the hfe matching ))
- Apply new paste and Mica were needed
- Apply new solder where needed on old solder
- I change also the big resitors next to the h718-719 as one of them had brownish spots on the board as if it was too hot at some point
** I will now change C703 as well with the 33/25 thanks again
And I just finished the dim bulb tester before I try to turn it on after all the work done above ^
So this is where I am at... If you have any advices they are welcome. I have had awesome help from this site and I am glad I subscribed..saved me from a lot of trouble
I have not tried to turn on the receiver yet as I wanted to have answers to my insecurity first, and I am glad I did..