Digital Control Board Voltage Test Points And Expected Readings; Digital Control Board Resistance Checks And Expected Readings - Lincoln Electric POWER WAVE S500 Service Manual

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DIGITAL CONTROL BOARD TEST (continued)
TABLE F.6 – DIGITAL CONTROL BOARD VOLTAGE TEST POINTS AND EXPECTED READINGS
DESCRIPTION
INPUT SUPPLY FROM
PFC BOARD
POWER FROM DIGITAL
CONTROL BOARD TO
CHOPPER BOARD
FAN CONTROL SIGNAL
POWER SUPPLY TO
CURRENT TRANSDUCER
POWER SUPPLY TO
CURRENT TRANSDUCER
SUPPLY TO OPTIONAL
INVERTER BOARD
TABLE F.7 – DIGITAL CONTROL BOARD RESISTANCE CHECKS AND EXPECTED READINGS
DESCRIPTION
CONNECTIONS TO
OUTPUT TERMINALS
CONNECTIONS TO
NORMALLY CLOSED
THERMOSTATS
TROUBLESHOOTING AND REPAIR
TEST POINTS LEAD NUMBERS
J4 PIN 2
TO
J4 PIN 1
J12 PIN 12
TO
J12 PIN 3
J7 PIN 16
TO
J7 PIN 6
J8 PIN 6
TO
J8 PIN 2
J8 PIN 6
TO
J8 PIN 3
J8 PIN 7
TO
J4 PIN 8
TEST POINTS LEAD NUMBERS
J9 PIN 3
TO
NEGATIVE
OUTPUT
TERMINAL
J9 PIN 1
TO
POSITIVE
OUTPUT
TERMINAL
J5 PIN 2
TO
J5 PIN 3
POWER WAVE
EXPECTED
READING
LEAD 356 (–) 40VDC
TO
LEAD 358 (+)
LEAD 348 (–) 5VDC
TO
LEAD 344 (+)
LEAD 350 (–) 10VDC
TO
LEAD 355 (+)
LEAD 214 (–) +15VDC
TO
LEAD 212 (+)
LEAD 214 (–) -15VDC
TO
LEAD 213 (+)
LEAD 417 (–) 15VDC
TO
LEAD 416 (+)
EXPECTED
READING
LEAD 202 ZERO OHMS
TO
NEGATIVE
OUTPUT
TERMINAL
LEAD 206
TO
ZERO OHMS
POSITIVE
OUTPUT
TERMINAL
LEAD 410 ZERO OHMS
TO
LEAD 409
® S500
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CONDITIONS
INPUT POWER
APPLIED TO
MACHINE
INPUT POWER
APPLIED TO
MACHINE
INPUT POWER
APPLIED AND FAN
RUNNING
INPUT POWER
APPLIED TO
MACHINE
INPUT POWER
APPLIED TO
MACHINE
INPUT POWER
APPLIED TO
MACHINE
CONDITIONS
NO INPUT POWER
APPLIED TO
MACHINE
NO INPUT POWER
APPLIED TO
MACHINE