Centronics 101A User's & Technical Manual page 67

4.8.2 +12V AND -12V REGULATORS (Schematic #63002308)
The voltage generated by the 35 VAC center-tapped secondary winding
of Tl is used as inputs to the +12V and -12V regulators. The operation of both
circuits is identical to that of the +5V regulator described in Section 4.8.1.
4.8.3 +35V POWER SUPPLY, UNREGULATED (Schematic #63002307)
The 26.5 VAC output from the transformer is rectified by diode bridge
MOl and filtered by R19-C1S to generate the +35V unregulated voltage for the
power driver circuits. All of these components are located in the electronics
cavity. The +35V output is fused through F5 and used as a voltage input to the
power driver board via connector P13-J13.
Rev. C