Connecting The Ac Line-Side Transformer Wires - DYNACO PAT-5 Assembly Manual

c. Red/yellow wire
2. Form the three wires into a twisted trio.
3. Insert the wires from the component side of the board and solder them on the
solder side.
a. Either red wire may connect to RED1
b. The remaining red wire connects to RED2
c. The Red/yellow wire connects to RED-YEL

Connecting the AC line-side transformer wires

Assuming your PAT5 was previously wired for 120V, you will find that:
 Black-White and Black transformer wires were twisted together
 Violet-White and Violet transformer wires were twisted together
As you perform the steps below, you will untwist these pairs, and form new twisted pairs
out of these four wires.
Make absolutely sure that your PAT-5 is unplugged!
1. Identify the following 2 transformer wires:
a. Violet
b. Black-white
c. Verify that you have the correct pair by measuring the DC resistance
between these two wires. The DC resistance is around 120 Ohms
2. Twist these insulated wires together to form a new twisted pair. (Violet and
Black-White) Of course, their ends remain independent.
3. Insert the wires into the component side of the board and solder them on the
solder side. Leave the wires as long as possible, but if their lengths differ greatly,
you will probably want to equalize them to the length of the shorter wire in the
pair. Just make sure that it will reach when everything is put back in place.
a. Connect the Violet wire to the VIO eyelet on the PCB.
b. Connect the Black/white wire to the BLK-WHT eyelet on the PCB.
4. Identify the following 2 transformer wires
a. Violet-White
b. Black
c. Verify that you have the correct pair by measuring the DC resistance
between these two wires. The DC resistance is around 120 Ohms.
5. Twist these insulated wires together to form a new twisted pair (Violet-White and
Black). Of course, their ends remain independent.
6. Insert the wires into the component side of the board and solder them on the
solder side. Leave the wires as long as possible, but if their lengths differ greatly,
you will probably want to equalize them to the length of the shorter wire in the
pair. Just make sure that it will reach when everything is put back in place.
a. Connect the Violet/white wire to the VIO-WHT eyelet on the PCB.
b. Connect the Black wire to the BLK eyelet on the PCB.
2 The resistance you find as you measure the DC resistance of these windings may vary by plus or minus
10% from the quoted value.
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