Hitachi C21-RF80S - 21" CRT TV Service Manual page 9

IC BLOCK DIAGRAM
IC 602 (Photo Transistor ) TLP621
TLP621
1
2
1:ANODE
2:CATHODE
3:EMITTER
4:COLLECTOR
IC 653 & IC 181& IC 652 (Regulators) L7800 Series
REFERENCE
VOLTAGE
INPUT
1
STARTING
CIRCUIT
4
3
CURRENT
SOA
GENERATOR
PROTECTION
ERROR
REFERENCE
AMPLIFIER
VOLTAGE
THERRMAL
PROTECTION
-9-
SERIES
OUTPUT
PASS
2
ELEMENT
GND
3