Toshiba MM20E45 - Power Supply Circuit

13-1
SECTION XIII POWER SUPPLY CIRCUIT
1. OUTLINE
Fig. 13-1 shows a block diagram of the power supply circuit
for the MM20E45 chassis.
The standby power supply uses a transformer and supplies
the power to microcomputers and relays. The main power
supply circuit is of a flyback type switching power supply
and features MOS FETs as switching elements and partial
resonant operation.
FILTER
CIRCUIT
AC Fuse
STANDBY
POWER SUPPLY
DEGAUSSER
RELAY
3-TERMINAL
REG. WITH
RESET
RECTIFIER
CIRCUIT
MAIN
SWITCHING
POWER
SUPPLY
Microcomputer
system
(Chopper regulator)
3-TERMINAL
REGU.
V901
(
CRT HEATER
)
182V line
30V line
20V line
QH24
following to T461 (FBT)
IC301,T401,TH03
(V.OUT)
IC601 (AUDIO OUT)
IC501,ICR02,ICR03
12V
12V
9V
5V
ICV01,H001,etc.
H001 (TUNER/IF),etc.
ICH08,ICH01,etc.
3-TERMINAL
REGU.
3-TERMINAL
REGU.
3-TERMINAL
REGU.
QF04
QF03
QH16
QF02
7V line
15V line
5V
Fig. 13-1 Block diagram of power supply circuit