Recent content by Poskok2010

Typical rookie mistake: Do not measure nothing with bulb tester in series. :biggrin:

Strange situation need help. 300DC was working before 3 years. One of the filter caps was damaged from top during moving, so i bought everything for recap including 4 filters 15.000 uF/80V. Change capacitors and trimmers and then no relay click, which was OK because DC was not set. Hooked...

well , i own one (not from wall) but remember when someone sold another one from "wall" but it did not have serial no, and that was the proof according to seller that he was used in the wall.

I dont question your conclusion, just i post for the guys schematic, to be sure that it is 151 fet. Dont want that this happen again :D 20230104_182604 by Poskok2010 posted Jan 29, 2023 at 9:31 PM 20230104_182753 by Poskok2010 posted Jan 29, 2023 at 9:30 PM

View from above

Suspected 2SK151

it is 2SK151 nevertheless, it doesnt have to be 151. just to be sure, dont want to burn something new.

https://ibb.co/17cpTdH click on, right click on pic and save as... In schematic i added missing wire which connects SK21 and SK11 board and burned unindentified (2sk151?) transistor with 2 resistors and diode, switches: S103 is for normal or double speed and S104 is for normal Bias. Is that fet...

miss this one, well thats the problem, Marantz 8020 is some guys say same as sd8000, but that transistor is not in schematic for sd8000.And sd8020 service manual what you can find on web is copy of SM for sd8000 with fake front page (with typo "serwice"). I had blown PK21 board , with hole in...

yep it looks like it. Thx , saved my day. but where i will find it:D, on ebay dont sell even fake sk151.

thx on advice will try for sure. But this one is very strange looking one, never noticed in any marantz long to-92. Ecxcept those japanesse bigger long to-92

He is blown, all leads short.

I'm on a Marantz compudeck SD8020 case and i'm lost, there is one blown transistor which is not in schematic available on the net. He is solderd bellow PK 21 board, not visible from the top. It has extended TO-92 body TO-226. 2 by Poskok2010 posted Jan 24, 2023 at 10:16 PM hi res image...