Lincoln Electric SVM169-A ユーザーズマニュアル
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Section E-1
Section E-1
Theory of Operation ...............................................................................................Section E
TABLE OF CONTENTS
- THEORY OF OPERATION SECTION -
FIGURE E.1 –
PRECISION TIG 185 BLOCK LOGIC DIAGRAM
INPUT
POWER
SWITCH
MAIN
TRANSFORMER
POLARITY
SWITCH
SCR
BRIDGE
X1
X2
AC
AC
DC+
DC-
CONTROL
BOARD
18VAC
18VAC
115VAC
FAN
REMOTE
RECEPTACLE
H1
H2
H3
SHUNT
115VAC
HIGH VOLTAGE
TRANSFORMER
CIRCUIT
BY-PASS
BOARD
HI-FREQUENCY
TRANSFORMER
TRANSFORMER
C
H
O
K
E
H
O
K
E
WORK
ELECTRODE
THERMAL
LIGHT
GAS
VALVE
THERMO-
STATS
OUTPUT
CONTROL
CONTROL
MODE
SWITCH
POWER
"ON"
DIGITAL
DISPLAY
DISPLAY
F
E
E
D
E
D
B
A
C
K
K
AUTO
BALANCE
LED
BALANCE
LED
TIG
LED
LED
STICK
LED
LED
PULSE
FREQ.
LED
FREQ.
LED
BYPASS
ASBLY
AC
BALANCE
CONTROL
BALANCE
CONTROL
PULSE
CONTROL
CONTROL
POSTFLOW
CONTROL
CONTROL