Lincoln Electric 11694 Service Manual page 37

®
POWER WAVE S350
DESCRIPTION
INPUT SUPPLY TO BOARD
POWER FROM CONTROL
BOARD TO CHOPPER
BOARD
SECONDARY VOLTAGE
FROM PFC BOARD
FAN CONTROL SIGNAL
POWER SUPPLY TO
CURRENT TRANSDUCER
POWER SUPPLY TO
CURRENT TRANSDUCER
SUPPLY TO OPTIONAL
SOLENOID
DESCRIPTION
CONNECTION TO OUTPUT
TERMINALS
CONNECTIONS TO
NORMALLY CLOSED
THERMOSTAT
CONTROL BOARD TEST
Table F.3 – Control board voltage tests
TEST POINTS LEAD NUMBERS
J4 PIN 2
TO
J4 PIN 1
J12 PIN 12
TO
J12 PIN 3
J6 PIN 10
TO
J7 PIN 14
J7 PIN 16
TO
J7 PIN 6
J8 PIN 6
TO
J8 PIN 2
J8 PIN 6
TO
J8 PIN 3
J4 PIN 10
TO
J6 PIN 12
Table F.4 – Control board associated resistance
TEST POINTS LEAD NUMBERS
J9 PIN 3
TO
NEGATIVE OUTPUT NEGATIVE OUTPUT
TERMINAL
J9 PIN 1
TO
POSITIVE OUTPUT POSITIVE OUTPUT
TERMINAL
J5 PIN 2
TO
J5 PIN 3
(continued)
EXPECTED READING
LEAD 356 (-) +40 VDC
TO
LEAD 358 (+)
LEAD 342 (-)
TO
LEAD 341 (+)
LEAD 404 (-) +15 VDC
TO
LEAD 406 (+)
LEAD 350 (-) 0 VDC (LOW SPEED)
TO 10 VDC (HIGH SPEED)
LEAD 355 (+)
LEAD 214 (-) +15 VDC
TO
LEAD 212 (+)
LEAD 214 (-)
TO
LEAD 213 (+)
LEAD 553 (+) +15 VDC
TO
LEAD 554 (-)
EXPECTED READING
LEAD 202 ZERO OHMS
TO
TERMINAL
LEAD 206 ZERO OHMS
TO
TERMINAL
LEAD 410 ZERO OHMS
TO
LEAD 409
TROUBLESHOOTING AND REPAIR
CONDITIONS
INPUT POWER APPLIED
TO MACHINE.
+5 VDC INPUT POWER APPLIED
TO MACHINE.
INPUT POWER APPLIED
TO MACHINE.
INPUT POWER APPLIED.
OUTPUT ENABLED FOR
HIGH FAN SPEED SIGNAL.
INPUT POWER APPLIED
TO MACHINE.
-15 VDC INPUT POWER APPLIED
TO MACHINE.
INPUT POWER APPLIED
TO MACHINE. OUTPUT
ENABLED.
CONDITIONS
NO INPUT POWER
APPLIED TO MACHINE.
NO INPUT POWER
APPLIED TO MACHINE.
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