Theory of operation, Control board – Lincoln Electric V155-S User Manual
Page 29
THEORY OF OPERATION
E-5
E-5
INVERTEC® V155-S
CONTROL BOARD
The Control Board receives status and analogue sig-
nals from the inverter board, input board and various
sensors and feeds this information to the Weld
Controller.
The Weld Controller is a micro-processor that uses
these signals along with input from the Mode Switch
and the Control Potentiometer to make decisions and
change the machine mode and output to satisfy the
requirements as decided by the operator. these
changes are relayed to the PWM circuit on the Inverter
Board to regulate the gate signals to the IGBT”s
FIGURE E.5 — CONTROL BOARD
The Weld Controler also responds to thermal and input
errors to shut down the machine output. The error
information is then displayed by the three LEDʼs on the
front panel.
The Mode Switch , the Control Potentiometer and the
three LEDʼs are all mounted on the Control Board.
CONTROL BOARD
W05X0708-1
(SCHEMATIC: X0708)
JP1
INPUT BOARD
W05X0701
(SCHEMATIC: X0701)
115/230Vac
50/60 Hz
ON/OFF SWITCH
5
2
N
L
G
WIRE TIE
4
1
BLUE
WHITE
WHITE
BLUE
WHITE
BLACK
AC2
AC1
PE
PWR2
PWR1
PWR4 PWR3
DC+
RED
DC-
BLACK
PCB CONNECTOR CAVITY NUMBERING SEQUENCE
(VIEWED FROM COMPONENT SIDE OF P.C. BOARD)
RIBBON CABLE
TWISTED CABLE
1
FAN
WHITE
RED
4
2
4 PINS
1
PE
RECONNECT
BOARD
W05X0408
(SCHEMATIC: X0408)
BLACK
JP4
BLUE
16
16 PINS
15
JP1
JP1
DC+
RED
DC-
BLACK
Y/G PE
INVERTER BOARD
W05X0519
(SCHEMATIC: X0519)
BLACK
RED
JP2
WHITE
W
HIT
E
P1
N1
BL
AC
K
RE
D
SHUNT
-
+