Figure 2-22. - 1000 V Regulator and Protect Circuit 1PS1A9, Schematic Diagram.
f: Resistor Board A8 (fig. 2-23). Resistor board A8 is
capacitors when power is turned off. These resistors are
in series with A9R9. The voltage drop across R9 is 0.01
a convenient mounting board for resistors required by A9
that of the output voltage. Resistors R9, R10, and R11
circuits. The high voltage terminals are on AS. Terminals
provide a bias voltage at the base of A9Q1 in the current
El/E8 of A8 are the 1000 V output to J1, terminal M (fig.
sense circuit. Resistor R12 and capacitor R5 feed back
2-18). Resistors R1, R2, R3, and
R4 provide part
any ripple voltage to the error sense circuit of A9R4. This
voltage divider for the -1000 V output from which the
has the effect of canceling ripple voltage.
error voltage (A9R4, 1000 V ADJ) is picked off. Resistors
R5, R6, R7, and R8 are bleeder resistors to discharge