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USER INTERFACE BOARD TEST (continued)
TEST PROCEDURE
Use always electrically insulate gloves during this test procedure
1. Remove input power from the wire feed unit.
2. Follow the LF52D User Interface removal procedure available inside this manual to get access to the connector
X100. See Figure 1.
3. Do not unplug the User Interface board from the Feeder. Keep it connected as indicated in Figure 1.
4. Visually check for burned or damaged components. If any components are physically damaged the motor control
board has to be replaced.
5. Apply the correct input power to the wire feeder connecting it through control cable to the power source.
6. Locate the User Interface board connector X100 and using the multimeter perform the tests as indicated in Test
Table 1.
Test table 1 – LF 52D User Interface Board test
Test Points
Expected reading
X100
pin 4(+) to
pin 3(-)
-
LED
V109
Figure 1 – LF52D User Interface component side
PCB LEDs status
and color
40VDC
-
-
V109 red
For LF52D
+40VDC power supply from Control Board
3,3 Vdc generated by the User Interface board is present
X100
Note
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