Anyone know how to modify this power supply for different voltages? There's no potentiometer on the board.
AC ADAPTER MODEL : SPS10A-001 (TSA-0285) INPUT : 100-120VAC 50/60Hz 1.0A MAX OUTPUT : 3.0 - 36VDC 3.0-0.41A 15W MAX PRESET : 5.0VDC 2.0A I.T.E POWER SUPPLY MADE IN THAILAND
Here is how to modify the output voltage: You need to vary the values of R19 and R20. This is a voltage divider that feeds 2.51 volts back to the sense element. These resistors are on the secondary side. For the 5 volt units R19 is 10.7 K and R20 is 10.0K R20 goes to ground and R19 goes to the positive output. Select R19 and R20 to divide down the required output voltage to 2.51 volts. D7 is a 5.6 volt Zener diode on the output and must be removed if you make the output voltage higher than 5.5 volts.
By the way, the regulator is the UC3842. Good Luck
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