some people just don't realize that even if they replace a component to the very same manufacturer,model,patch,and production line - they may have to readjust the circuit for it to operate in a fist place or operate as it should . . . this is hoplessHello,
When you show us the schematic where the 2SB is used, we will be able to offer better advice.
Bertus
extract from the very NEC datasheet:some people just don't realize that even if they replace a component to the very same manufacturer,model,patch,and production line - they may have to readjust the circuit for it to operate in a fist place or operate as it should . . . this is hopless