TROUBLESHOOTING & REPAIR
F-53
F-53
LN-9 GMA 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
