Connect The New Power Supply; Final Test And Assembly - DYNACO SCA-80 Assembly Manual

Connect the New Power Supply

All of the power connections are made in the same fashion:
1. Strip ¼" of insulation off each of the wires to be connected.
2. Insert the wire from the solder side of the board, and solder it on the component
side of the board.
Label Number
with of wires
 3
4G 4
2G 2
 1

1

Final Test and Assembly

Inspect your work:
1. Make sure that all the new wires are soldered in place.
2. Make sure that there are no solder bridges
Your SCA-80 should still be disconnected from your music system and it should still be
unplugged from the wall outlet.
Carefully plug in the SCA-80 to the wall outlet, taking special care to avoid contact with
the high voltage (either 120 V or 240 Volt) wiring inside the unit. Set your meter to DCV
and measure the following voltages with respect to the ground terminals on the power
supply board (or the chassis):
1. 24V should be between 22.75 and 25.25 Volts
2. 17.5 V  should be between 17 and 18 Volts
3. 71 V  should be between 65 and 77 Volts
Where wires connected
Any 3 of the 4 terminals on the PCB above the A 
marking.
The 4 terminals about the double ground sign.
The two terminals above the single ground sign
Either of the two terminals above the E marking of the
PCB.
Either of the two terminals above the F marking of
PCB.
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