High Voltage Generation Circuit - Toshiba CN27E90 Technical Training Manual

which has two times the H oscillator frequency.
5. HIGH VOLTAGE GENERATION
CIRCUIT
The high voltage generation circuit develops an anode voltage
for the picture tube, focus, screen, CRT heater, video output
(210V) and so on by stepping up the pulse voltage developed
for flyback period of the horizontal output circuit with the
FBT, and supplies the power to various circuit.
Auxiliary
winding
Primary
winding
AFC
blanking
Heater
+27V
C310
C460
-27.5V
+210V
C446
+125V
C448
D404
T401
C463
1000V
P-P
1H
(15.75KHz)
C303
D302
R327
D460
R469
D406
L441
0
C442
Fig. 11-13
79
CRT
10
anode
9
4
7
6
5
3
2
1
ABL
Screen
H deflection coil
L462
R441
Focus