Important Safety Notes; Section 2: Preliminaries; Opening The Amplifier; Check The Power Supply Voltage - DYNACO SCA80 Manual

Important Safety Notes

By purchasing this kit, you have agreed to hold AkitikA, LLC harmless for any injuries
you may receive in its assembly and/or use. To prevent injuries:
 Wear safety glasses when soldering to prevent eye injuries.
 Always unplug the power before working on the amplifier.
 Large capacitors hold lots of energy for a long time. Before you put your hands
into the amplifier:
o Pull the AC plug!
o Wait 1 full minute for the capacitors to discharge!
 Remove jewelry and rings from your hands and wrists, or anything that might
dangle into the amplifier.
 If working in the amplifier, keep one hand in your pocket, especially if you're
near the power supply or power supply wires. This can prevent serious shocks.
 Build with a buddy nearby. If you've ignored all the previous advice, they can
dial 911 or get you to the hospital.

Section 2: Preliminaries

Opening the Amplifier

1. Make sure the amplifier is unplugged. If it was recently powered allow the amp
to sit for one full minute before proceeding.
2. Remove two screws from the left side of the amp's cover. (see Figure 1).
3. Remove two screws for the right side of the amp's cover.
4. Remove the screw in the center of the cover along the back panel.
5. Lift the perforated metal top off the amplifier.

Figure 1-Side and Back views showing location of cover retaining screws

Check the Power Supply Voltage

First, you'll need to safely check the power supply output voltage.
1. Turn the SCA80(Q) power switch off.
2. Keeping hands well clear of the inside of the SCA80(Q), plug in the power cord.
3. Turn the SCA80(Q) power switch on and give the amp about 15 seconds to
stabilize.
4. Refer to Figure 7. Measure the DC voltage present on the terminals of C9. The
nominal voltage is 72 volts.
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