inverted polarity on stm3320820a smoke on pwm diode is there someone in italy that can change diodes?
the hdd is stm3320820a fw:3AAE P.N:9DP03G-326 TK DATA CODE 7276
I have 2 other hdd fw:3AAE P.N:9DP03G-326 TK DATA CODE 8397
3AAE P.N:9DP03G-326 TK DATA CODE 7383
I made some measurements.
In test diode 5v and ground are in conduction on + of diode.
I made tests indicated by fzabakar in his wonderful guide.
I so think there is a short. Can i change diode or risk to damage something else without protection.?
If i remove diode then what are measurement i can do to be calm that everithings are ok?
Obviously no short on removed diode pin , but also can i check conductivivity between ground and -pin of diode and no conductivity between ground and + pin of removed diode.And test of 5v?