A replacement MJE15031 in an older System6 power supply. The leads on the MJE15030 and MJE15031 must be "twisted" to replace the older SDS201 and SDS202 transistors.
IMPORTANT: heat shrink tubing should be installed over the crossed leg to prevent shorts!
* Note that the original style SDS201/SDS202 transistors at Q1/Q3 are no longer available in any flavor or form. These two transistors must be replaced with the newer
MJE15030/ SDS201
MJE15031/ SDS202 transistors.
BUT NOTE: the MJE transistors had a different pinout than the original SDS transistors, so they must be installed differently on the board!!
Pinouts:
SDS trans: E B C
MJE trans: B C E
More info here
