Theory Of Operation - Lincoln Electric IDEALARC CV-300 Service Manual

- THEORY OF OPERATION SECTION -
THEORY OF OPERATION SECTION ........................ Section E
Power Supply Operation .................................................E-1
Input Line Voltage, Line Switch and
Main Transformer ........................................................E-1
Output Rectification, Filtering, Control and
Feedback.....................................................................E-2
Protection Devices and Circuits...................................... E-3
SCR Operation .................................................................E-4
14 PIN
AMPHENOL
FAN
MOTOR
4
115VAC
2
V
A
C
INPUT
RECONNECT
LINE
PANEL
SWITCH

THEORY OF OPERATION

TABLE OF CONTENTS
TRIGGER AND REMOTE
12VAC
CONTROL BOARD
12VAC
G
A
T
E
S
+
OUTPUT
MAIN
RECTIFIER
TRANSFORMER
Figure E.1 - Block Logic Diagram.
NOTE: Unshaded areas of Block Logic
Diagram are the subject of discussion
IDEALARC CV-300
OUTPUT
CONTROL
METER
F
E
E
D
B
A
C
K
SHUNT
CAPACITORS
-
F
E
E
D
B
A
C
K
+
OUTPUT
TERMINALS
-
-
CHOKE