TM 5-6675-316-14
The 18.5 V ac center-tapped winding feeds bridge rectifier CR1 which produces +18 V
and +9 V. Smoothing is provided by a capacitor C1. Both the 18 V and 9 V sup-
plies go to the +5 V regulator on the power supply board. The 39 V ac center-tapped
winding feeds bridge rectifier CR4, which produces +26 V, -26 V and provides a
26 V return. Filtering is provided by capacitors C2 and C3. Both the positive and
negative 26 V supplies go to the driver board.
Four secondary windings supply ac power to the power supply board and the input/
monitor unit. The 30 V ac center-tapped winding supplies power to the +12, -12, -9
and -5 V regulators on the power supply board, the 27 V ac winding going to the +24
V regulated supply circuit also on the power supply board.
The input/monitor unit receives two ac supplies: 80 V ac, which is used to supply
the monitor with all its power requirements, and 6.3 V ac, which is used specifically
to power the heating filament of the CRT.
The main dc power supply can be divided into three sections:
Terminal Regulators
High-Current, +5 V Supply
+24 V Circuitry
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