Amphenol 1, Troubleshooting & repair, Remote receptacle resistance test (continued) – Lincoln Electric VANTAGE 400 User Manual
Page 128
FIGURE F.17
REMOTE RECEPTACLE RESISTANCE TEST (CONTINUED)
TEST PROCEDURE
1. Turn the machine off.
2. Perform
the
3. Make sure that there are no devices of any
kind plugged into either Amphenol receptacles.
4. Remove Molex plug P1 from the control PC
board, see Control Inner-Connection Diagram.
Examine the Molex plug and the receptacle on
the control PC board for dirt, corrosion, dam-
aged or out-of-position pins. Repair or replace
any damaged components. Position the P1
plug so it can not make electrical contact with
any other conductor or chassis ground.
5. Perform the following resistance tests shown in
the following table. Be very careful not to dam-
age or spread any of the connection pins in the
Amphenol receptacle. See Table F.4.
6. If the measured resistance does not meet val-
ues specified, check for damage, dirt or mois-
ture contamination in the Amphenol recepta-
cles and the P1 Molex plug. Check for dam-
aged or grounded wiring.
7. If the resistance values are found to be too low,
due to contaminated electrical components in
the Amphenol harness assembly. Try removing
the contamination and drying the components
completely. If the resistance values are still too
low, replace the Amphenol harness assembly.
8. If the values are incorrect for the last two tests
in the table, (Pin C to Pin D) check the welding
terminal switch and the wiring connected to
that switch. See the wiring diagram. Repair
any faulty connections or replace the switch if
necessary.
9. Plug P1 back into the Control Pc board.
10. Perform the Case Cover Replacement
TROUBLESHOOTING & REPAIR
F-80
F-80
VANTAGE® 400
AMPHENOL 1
E
C
D
A
B
L
K
J
M
N
F
G
H
I