Kenwood mini stereo model:KR-595
 

Kenwood mini stereo model:KR-595,year:Jan 1996.Shuts off right away,I
replaced Q20=2SB1470BT 2 years ago then earlier this year in Feb.Now
the unit is back with Q20 being open base-emitter (I assume it's those
pins) and this time R102=22 ohm,1/4w and R100=22 ohm,1/4w measure fine
but appeared to be slightly burnt.
Anyone have any common repair tips for repeated failure of Q20? as I
have used an original Panasonic generic transistor from:

http://www/globalsemi.com

as they state in their paperback catalog that their semiconductors are
original Japanese and not overstamped Chinese knockoffs.Thanks in
advance for replies.

Sidney
Dartmouth,Nova Scotia
Canada