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TROUBLESHOOTING & REPAIR
F-49 F-49
LN-9 Wire Feeder
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GENERAL POWER SUPPLY CHECKS
CHECKPOINT TEST CONNECTOR LEAD NO. NORMAL
LOCATION DESCRIPTION PLUG PIN NO. ACCEPTABLE
VOLTAGE
READING
CONTROL P.C. CHECK
BOARD +15VDC
CONNECTOR SUPPLY FROM
PLUG POWER 525(+) 13.5 - 15.5 VDC
BOARD TO 510(-)
CONTROL 10(+)
BOARD 9(-)
CONTROL P.C. CHECK - 10 VDC
BOARD SUPPLY FROM
CONNECTOR POWER 500(-) 9.2 - 10.8 VDC
PLUG BOARD TO 510(+)
CONTROL 14(-)
BOARD 9(+)
VOLTAGE P.C. CHECK
BOARD UPPER + 15 VDC
CONNECTOR SUPPLY FROM
PLUG NEXT TO POWER 525(+) 13.5 - 15.5 VDC
"F" AND “S” BOARD TO 510(-)
PINS VOLTAGE 4(+)
BOARD 6(-)
VOLTAGE P.C.
BOARD UPPER
CONNECTOR 510(+)
PLUG NEXT TO
6(+)
"F" AND "S" CHECK - 10 VDC
PINS SUPPLY FROM
POWER 9.2 - 10.8 VDC
BOARD TO
VOLTAGE P.C. VOLTAGE
BOARD LOWER BOARD
CONNECTOR 500(-)
PLUG NEXT TO 4(-)
PLASTIC
COVERED
RELAY
GENERAL POWER SUPPLY TESTS (continued)
525
510
500
510
525
510
510
500