Lincoln Electric SVM154-A Service Manual page 70

F-25
NOTE: There should not be continuity
between pins until a key is pressed on the
keypad.
TEST POINTS
FROM PIN TO PIN
1J10 2J10
1J10 3J10
1J10 4J10
1J10 6J10
1J10 7J10
1J10 8J10
1J10 9J10
TROUBLESHOOTING AND REPAIR
KEYPAD RESISTANCE TEST (continued)
TABLE F.1 — KEYPAD RESISTANCE TEST.
KEY PRESSED
CONTROL
TIMER
TRIGGER
PROCEDURE
COLD FEED FORWARD
COLD FEED REVERSE
GAS PURGE
ALLOWABLE RESISTANCE
(TYPICAL RESISTANCE)
100 OHMS (50 OHMS TYPICAL)
100 OHMS (50 OHMS TYPICAL)
100 OHMS (50 OHMS TYPICAL)
100 OHMS (50 OHMS TYPICAL)
100 OHMS (50 OHMS TYPICAL)
100 OHMS (50 OHMS TYPICAL)
100 OHMS (50 OHMS TYPICAL)
LN-10
F-25
MAXIMUM