Hero-1 Power Supply Notes

The externial power supply for the Hero-1 consist of a transformer which steps the 125Vac down to aprox 20VAC. Its output is then through R1, R2 to limit the current. This then goes to a full-wave bridge and is filtered by C1 producing approximately 25-28Vdc unregulated.

        C1 3300uf
	R1 2.5ohm 10W
	R2 2.5ohm 10W
	P101 (the plug) is wired as follows:


		+25V              1     Ground
		 |                2     shorted to 3
	+--------|----+           3     shorted to 2
	|  3  6  9 12 |           4     Ground
	 > |  |  |    |           5     shorted to 6
	|  2  5  8 11 |           6     shorted to 5
	 >            |           7	no connection
	|  1--4  7 10 |           8     +25V
	+--|----------+           9     +25V
           |                      10    no connection 
	 Ground                   11    no connection 
	                          12    no connection