Lincoln Electric IDEALARC SP-255 Service Manual page 78

F-25
NOTE: THERE SHOULD NOT BE CONTINUITY BETWEEN PINS UNTIL A KEY IS PRESSED ON THE KEYPAD.
TEST POINTS
FROM PIN TO PIN
1J2 6J2
1J2 8J2
1J2 2J2
1J2 4J2
2J2 9J2
2J2 7J2
2J2 3J2
2J2 5J2
3J2 6J2
3J2 8J2
3J2 4J2
4J2 9J2
4J2 7J2
4J2 5J2
5J2 6J2
5J2 8J2
6J2 9J2
6J2 7J2
7J2 8J2
8J2 9J2
TROUBLESHOOTING & REPAIR
SP-255 KEYPAD RESISTANCE TEST
TABLE F.1 - SP-255 KEYPAD RESISTANCE TESTS
KEY PRESSED
CENTER UP ARROW
CENTER DOWN ARROW
MEMORY 3
SWITCH SET DISPLAY
MEMORY 5
MEMORY 4
MEMORY 2
MEMORY 1
LEFT UP ARROW
LEFT DOWN ARROW
SPOT
TOGGLE
IMP VOLTS
TIMERS OFF
AUTO
PROCESS WIRE/GAS
MANUAL
RIGHT UP ARROW
RIGHT DOWN ARROW
SAVE
IDEALARC
MAXIMUM ALLOWABLE
RESISTANCE
(TYPICAL RESISTANCE)
100 OHMS (30 TYPICAL)
100 OHMS (30 TYPICAL)
100 OHMS (30 TYPICAL)
100 OHMS (30 TYPICAL)
100 OHMS (30 TYPICAL)
100 OHMS (30 TYPICAL)
100 OHMS (30 TYPICAL)
100 OHMS (30 TYPICAL)
100 OHMS (30 TYPICAL)
100 OHMS (30 TYPICAL)
100 OHMS (30 TYPICAL)
100 OHMS (30 TYPICAL)
100 OHMS (30 TYPICAL)
100 OHMS (30 TYPICAL)
100 OHMS (30 TYPICAL)
100 OHMS (30 TYPICAL)
100 OHMS (30 TYPICAL)
100 OHMS (30 TYPICAL)
100 OHMS (30 TYPICAL)
100 OHMS (30 TYPICAL)
® SP-255
F-25