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Find the IEC power cord. Make sure that the power switch is off. The next step will put
lethal voltages into the chassis, so please exercise caution.
Caution: 120 Volts or 240 Volts can be lethal. Take care not to come into direct contact
1. Connect the IEC power cord to the back-panel connector.
2. Connect the IEC power cord to the mains connection.
3. Turn on the power switch and make sure that:
a. The power switch lights up
b. No smoke or signs of distress emanate from the power supply
4. If step 3 was successful, move onto the power supply test.
5. If step 3 was not successful:
a. Pull the Plug and the IEC connector.
b. Review the colors on your transformer wiring.
Test the power supply
Measure the:
1. +12V DC. It should be 12 Volts plus or minus 0.5Volts.
a. Black meter probe on one of the AGD terminals along the front edge of
the power supply
b. Red meter probe on one of the P12 terminals along the front edge of the
power supply.
2. -12V DC. It should be -12 Volts plus or minus 0.5Volts.
a. Black meter probe on one of the AGD terminals along the front edge of
the power supply
b. Red meter probe on one of the N12 terminals along the front edge of the
power supply.
3. 5V DC. It should be 5 Volts plus or minus 0.25Volts.
a. Black meter probe on one of the BGD terminals along the side of the
power supply
b. Red meter probe on one of the +5V terminals along the front edge of the
power supply.
As there is no load on the power supply during this test, there should be no heat observed
in any component of the power supply.
Remove the power cord from the wall and from the IEC powe
Warning: do not go any further until the power supply has passed its test. If you’re
having trouble, please send email to
for troubleshooting advice.
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