TCI Library www.telephonecollectors.info
AT&T Private Pay Phone Plus
February, 1988
4. Temporarily Connect Power Cable to Power Transformer
• Strip about 2 inches of the outer jacket from the other end of the electrical power
cable .
• Strip about 1 /2 inch insulation from the 4 exposed wires .
• Make sure the color of each small wire attached to a labeled connector on the
power supply board corresponds to the same color of wire and label on the
terminal block of the power transformer:
• red and yellow wires to CT
green wire to L1
black
wire to L2
• Connect each wire to the appropriately-labeled screw terminal on the power
transformer.
NOTE The terminal labeled" SPAR£' on the power transformer is not used.
NOTE Make sure wires are secure and the ends are not sticking out. Unsecured
wire ends touching the metal plates will cause a short when power is restored.
CAUTION
Confirm that wire connections at the pow er transformer and the pow er supply board's
terminal block are matching.
Figure 4 Connect Power Wire to Pow er Transformer
D O I
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Owner Manual
Page 15
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