Tektronix 576 - Page 66

T he voltage on t he d is p lay geometry screen is controlled
by G E O ME TR Y
a
d j ustment R 893 . T h
e
voltage on t he dis-
play astigmatism screen is controlle d by ASTIG M ATIS M
a d ju stment R 891 . Curre n t for t he trace rotation controlling
coil is controlle d b y T R AC E R OTATIO N ad j ustment
R 897 .
Ci r cuit
Desc r i p tio n -Type 576
+225-volt S upp ly . T he +225-volt su pp ly is
ge n erate d
from t he same transformer win d i ng as t h e -4 kV
refere
n
ce
su pp ly . It consists of h alf-wave
rectifier D868 an d D865,
filter ca p acitors C869, C868 an d Q868 . R egulation of t he
+225-volt s u pply is
su p plie d by t he reference su pp ly
t h roug h d ivi d er β 860
t
h
roug h R 864, an d t h roug h emitter
followers Q866 and Q868 .