Elenco 015V Power Supply Kit - Manual (Page 7)

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OPERATING PROCEDURE
To operate the K-11 Power Supply, plug the line cord into a 120V, 60Hz AC outlet, turn the switch (S1) to the
ON position and rotate the potentiometer (R2) to make the output voltage climb from 0 to 15 volts DC. The red
wire from P1 is the positive output, the blue wire from P2 is the negative DC output, and the two yellow wires
are the AC output - 8.5V without regulation.
TROUBLESHOOTING
One of the most frequently occurring problems is poor solder connections.
1. Tug slightly on all parts to make sure that they are indeed soldered.
2. All solder connections should be shiny. Resolder any that are not.
3. Solder should flow into a smooth puddle rather than a round ball. Resolder any connection that has formed
into a ball.
4. Have any solder bridges formed? A solder bridge may occur if you accidentally touch an adjacent foil by
using too much solder or by dragging the soldering iron across adjacent foils. Break the bridge with your
soldering iron.
COMPONENT CHECK
1. Be sure that all components have been mounted in their correct places.
2. Be sure that the electrolytic capacitors C1 and C2 have been installed correctly. These capacitors have
polarity, the negative and positive leads must be in the correct holes.
3. Be sure that diodes D1 - D3 have not been installed backwards. The band on the diodes should be in the
same direction as shown in the pictorial diagram.
SCHEMATIC DIAGRAM
OUTPUT
DC: 0-15V @ 250mA
AC: 8.5V @ 500mA
Positive
Negative
Output DC
Output AC