Kale
Super Member
Phono Preamp
Now I am going to restore phono preamps (MM and MC)...
those pictures above are MC phono preamps-
Because those preamps can produce some problems, I made a special attention to restore them... first of all I replaced 2SB527 2SD357 with 2SB528 2SD529 (greater Vcbo)
... then trimmers...
... on the left side deadly glue removed...
... again that glue... (on that picture you can see the new small signal transistors, there I have replaced them all)
...VD1212 replaced ...
Yes, I already noticed that, but that was something before I got it, and the new resistor is OK (I checked it).BTW Is that a scorch mark under one of the four bottom row of resistors (first picture of the Driver board on post #14) - If it is, looks like some serious heat(?)
Now I am going to restore phono preamps (MM and MC)...
those pictures above are MC phono preamps-
Because those preamps can produce some problems, I made a special attention to restore them... first of all I replaced 2SB527 2SD357 with 2SB528 2SD529 (greater Vcbo)
... then trimmers...
... on the left side deadly glue removed...
... again that glue... (on that picture you can see the new small signal transistors, there I have replaced them all)
...VD1212 replaced ...