Search results

Hi guys, Sorry have been a few days off. Finally today I´ve re-checked in Q301 pins and here are DC results: -49.1 v between pin 1 and ground -48.7 v between pin 2 and ground -51.3 v between pin 3 and ground I think these values makes now much more sense, and are aligned with what to be...

Hi sergeauckland, I´ve done the suggested measurements with following results: Two blue wires aka transformer AC output: 38.1v (yellow square in picture) R33 far pin to transistor Q301 (blue circle in picture)-> AC: 112.9 v, DC: 51.6v R33 close pin to transistor Q301 (red circle in picture)->...

Hi guys, I´ve just done the cleaning and the Q301 checks. I´ve measured -110v between legs 1 and ground, and between leg 2 and ground, and -105 between leg 3 and ground: As sergeauckland suggested, and confirmed by my own check in service manual, expected voltage there is -45v (I guess this...

Thanks again, sergeauckland. Yes, all fuses were checked (that was my firsts check), and a bit of cleaning of dust in all parts inside (I could do it better with some specific product, but after hearing the noise I was under the impression that wasn´t dirty contacts related). Will try this...

Thanks sergeauckland, I´ve downloaded the service manual and have located Q301. Unfortunately I don´t have a signal generator nor oscilloscope, but a multimeter that hopefully can help me to get some checks. Attached I´ve sent a pic where Q301 is located, do you think I could try to get the...

Thanks all for your replies. Yes, same noise in both channels. I would like to see some options to repair, as I said this has happened all of a sudden, so I would like to try it before buying a new one! Would you please suggest some concrete actions to check/try? Would be great also if you can...

Hi folks, I come to this forum seeking some help beyond my knowledge to resolve a weird issue I´m experiencing in my Luxman L-1 amplifier. It has worked pretty well during his more than 30 years of life. However, quite recently, it creates a very frustrating noise in both Phono an Subsonic...