Toshiba TW40F80 - Manual (Page 75)

75
5. HIGH VOLTAGE GENERATION CIRCUIT
Fig. 9-15
The high voltage generation circuit develops an anode volt-
age 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 cir-
cuit with the FBT, and supplies the power to various cir-
cuit.
5-1. Theory of Operation
10
9
4
7
6
3
2
1
5
Auxiliary
winding
Primary
winding
AFC
blanking
Heater
+35V
-27.5V
+210V
+125V
C310
C303
D302
C460
D460
R327
R469
D406
C446
C448
Q404
C463
T401
CRT
anode
ABL
H deflection coil
L462/L463/L464
R441
C423
L441
1040V (p-p)
1H
(15.625kHz)
R444
R443
Focus pack
D408
C447
R448
+12V-1
DPC CIRCUIT HIGH VOLTAGE
REGULATOR
CIRCUIT
C440 C444
C467
C443
C418