Hirrebirre
New Member
Hello!
I recently laid my hands on a A/V receiver from Marantz slimline, model NR1501.
In the ad it said it was defect since it wouldn´t come out of standby mode. First I assumed it was in some protect mode caused by shorted transistors at the output so I bought it cheap and was excited since I really like to repair electronics.
When it arrived I plugged it in and it immediately went into standby mode, so far so good. I then tried to power it on via the remote controll. Nothing happens. I then thought if the remote controll maybe where the faulty part so I tried to power it on by pressing the other buttons on the receiver, it worked. I now can set it on/off wih the power button on the receiver, without it ever going in standby mode.
Everything else on the remote controll sems to work, only the on/off function that doesnt work. This is problem #1.
Problem #2:
If I play music from my phone via one of the two AUX inputs, it works. However, if i plug in my TV with HDMI or Toslink it will only play when source direct is active. Otherwise its just sounds like when listening to a radio without reception. Even when I have source direct active its not sounding good at all, only better then when its not active.
I´ve already disassembled the unit once and took away all the dust which honestly wasnt much at all, but something I always tend to do when i get new gear.
I also made some basic measurments with DMM and oscilloscope on the regulated power rails and found nothing strange there. SInce its the digital inputs that are troublesome i´m guessing something on the digital board but that seems like a nightmare to troubleshoot...
I hope that my descriptions of these problem are at least somewhat understandible and that someone on this fantastic forum may have some tips or guidence for me. I would really appreciate any help and can provide pictures also if thats helpful.
I cannot find the service manual on my usual websites so if anyone know how to get it I would be very happy
I´m pretty new in the HiFi world but very eager to learn. Especially about the troubleshooting piece of art
Regards
I recently laid my hands on a A/V receiver from Marantz slimline, model NR1501.
In the ad it said it was defect since it wouldn´t come out of standby mode. First I assumed it was in some protect mode caused by shorted transistors at the output so I bought it cheap and was excited since I really like to repair electronics.
When it arrived I plugged it in and it immediately went into standby mode, so far so good. I then tried to power it on via the remote controll. Nothing happens. I then thought if the remote controll maybe where the faulty part so I tried to power it on by pressing the other buttons on the receiver, it worked. I now can set it on/off wih the power button on the receiver, without it ever going in standby mode.
Everything else on the remote controll sems to work, only the on/off function that doesnt work. This is problem #1.
Problem #2:
If I play music from my phone via one of the two AUX inputs, it works. However, if i plug in my TV with HDMI or Toslink it will only play when source direct is active. Otherwise its just sounds like when listening to a radio without reception. Even when I have source direct active its not sounding good at all, only better then when its not active.
I´ve already disassembled the unit once and took away all the dust which honestly wasnt much at all, but something I always tend to do when i get new gear.
I also made some basic measurments with DMM and oscilloscope on the regulated power rails and found nothing strange there. SInce its the digital inputs that are troublesome i´m guessing something on the digital board but that seems like a nightmare to troubleshoot...
I hope that my descriptions of these problem are at least somewhat understandible and that someone on this fantastic forum may have some tips or guidence for me. I would really appreciate any help and can provide pictures also if thats helpful.
I cannot find the service manual on my usual websites so if anyone know how to get it I would be very happy
I´m pretty new in the HiFi world but very eager to learn. Especially about the troubleshooting piece of art
Regards
but very low ok !
