Hitachi C21-RF80S Service Manual - Page 9
Anode, Cathode, Emitter, Collector
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IC BLOCK DIAGRAM IC 602 (Photo Transistor ) TLP621 TLP621 1 4 2 3 1:ANODE 2:CATHODE 3:EMITTER 4:COLLECTOR IC 653 & IC 181& IC 652 (Regulators) L7800 Series INPUT 1 REFERENCE VOLTAGE CURRENT GENERATOR SERIES PASS ELEMENT OUTPUT 2 SOA PROTECTION STARTING CIRCUIT REFERENCE VOLTAGE ERROR AMPLIFIER THERRMAL PROTECTION GND 3 -9-
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-9-
1
INPUT
2
OUTPUT
SERIES
PASS
ELEMENT
SOA
PROTECTION
REFERENCE
VOLTAGE
ERROR
AMPLIFIER
THERRMAL
PROTECTION
STARTING
CIRCUIT
CURRENT
GENERATOR
REFERENCE
VOLTAGE
3
GND
IC 653 & IC 181& IC 652 (Regulators)
L7800 Series
1
2
3
4
1:ANODE
2:CATHODE
3:EMITTER
4:COLLECTOR
IC 602 (Photo Transistor ) TLP621
IC BLOCK DIAGRAM
TLP621