Tweco 400 TS Arcmaster - Manual (Page 18)

11
2.02 Functional Block Diagram
Figure 2 illustrates the functional block diagram of the 400 TS power supply.
Main
Circuit
Switch
Filter
Input
Diode
Primary
Capacitor
DC Power
Voltage
Sensor
IGBT
Inverter
Thermal
Detector
To each control circuit
+/-15VDC +18VDC
+24VDC +5VDC
Troublel
Sensing
Circuit
Drive
Circuit
Torch Control
Connection
(CON1)
circuit
Current
Adjustment
Reference
Adjustment &
Mode select Switches
Panel Circuit Board
Sequence
Control
Themal
Sensor
Circuit
Main
Transformer
(PCB14)
Output
Diodes
HF-UNIT
Control
Circuit
Stick Mode
VRD
Sensing
Circuit
Lift T ig Mode
Output Short
Sensing
Circuit
Coupling
High
Coil
Frequency
Unit
Fan Control
Circuit
Gas Control
Circuit
Fan
Solenoid
Hall Current
Transformer
(HCT1)
Output
Inductor
Thermal
Detector
+
-
+ -
Input
Power
Primary
Current
Sensor
Figure 2. 400 TS Model Functional Block Diagram
2.03 Transporting Methods
This unit is equipped with a handle for carrying purposes.
WARNING 1
ELECTRIC SHOCK can kill. DO NOT TOUCH live electrical parts. Disconnect input power conductors
from de-energized supply line before moving the welding power source.
WARNING 2
FALLING EQUIPMENT can cause serious personal injury and equipment damage.
Lift unit with handle on top of case.
Use handcart or similar device of adequate capacity.
If using a fork lift vehicle, place and secure unit on a proper skid before transporting.