Low- Voltage Power Supply A4 - Raytheon DIDS-400 Series Technical Manual

DIDS-402-2AM13
4-20 POWER SUPPLIES
The display terminal power supply circuitry is shown in figure 4-12. Both
power supply assemblies employ solid-state components to furnish regulated dc
output voltages. The low-voltage power supply also produces two 6. 3-vac outputs
which are not regulated.
4-20.1 Low-Voltage Power Supply A4
The low-voltage power supply is used to develop the following output
voltages:
a. +5 VDC - This voltage is used internally to operate integrated circuits
on digital boards A12, A13, and A14 and operational and transistorized
amplifiers on analog boards A3 and A9.
b. -22 VDC and +22 VDC - These voltages are used to operate power
transistors in the interface and sweep circuits. In addition, the
+22 vdc and -22 vdc outputs are used as a dc source input to high-
voltage power supply A5.
c. +100 VDC - The 100 vdc output is used for operating transistors on
analog boards A2, A3, A6 and AB.
d. 6 VAC (Isolated) - The isolated ac output is supplied to furnish
filament voltage for the monos cope •
e. 6 VAC - The nonisolated ac output is supplied to furnish a filament
voltage for the CRT.
4-20.2 High-Voltage Power Supply A5
The high-voltage power supply produces output voltages of +500 vdc,
-1.2 kvdc, and +12 kvdc. These voltages are used for
the
following purposes:
a. +500 VDC - This output is used to furnish acceleration and focusing
voltages for the CRT.
b. -1.2 KVDC - This output voltage which is applied to the monoscope
filament produces a high difference in potential between cathode and
target elements, thus producing the monoscope deflection beam.
c. +12 KVDC - This output voltage is applied to the CRT anode element
and produces the CRT electron beam.
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