Low Voltage Power Supply A4; Model 402-2Am13 Display Terminal, Rear View - Raytheon DIDS-400 Series Technical Manual

DIDS-402-2AMl3 .
VIDEO AMPLIFIER AS
E017322(MU
Figure 1-7. Model 402-2AM13 Display Terminal, Rear View
1-2.11 Vertical and Horizontal Deflection Amplifier Assembly A2
The vertical and horizontal deflection amplifier as sembly (see figure 1-6)
produces sweep voltages for scanning the CRT screen. Vertical and horizontal
drive signals are developed by the timing circuits on ttming and discrete board A14.
These drive signals are amplified by the deflection amplifier and two outputs are
produced: vertical and horizontal sweep signals. The horizontal sweep signal
causes the CRT electron beam to scan from left to right across the screen. The
vertical sweep signal causes the CRT electron beam to scan from the top of the
screen to the bottom. This electromagnetic deflection is accomplished by the
vertical and horizontal windings of a deflection coil (yoke) mounted on the CRT
neck between the cathode and anode elements.
1-2.12 Low Voltage Power Supply A4
The low voltage power supply (see figure 1-6) is a solid-state, fully regu-
lated, ac-to-dc converter. The low voltage outputs are: +5 vdc, +22 vdc, -22 vdc,
+100 vdc, 6 vac (isolated), and 6 vac (hQnisolated). These voltages are used for
the following functions:
1-10