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SEWING MACHINE DIV. 20 MODEL 385.19001890
CHECKING ELECTRONIC PARTS
I.MACHINE SOCKET
PRIMARY (POWER CORD, POWER SWITCH)
*WITH THEPOWER CORD CONNECTED AND THE POWER SWITCH TURNED ON, YOU
SHOULD SEEAPPROXIMATELY 120 VOLTSAC (WITH A VOLT METER)ON THE PRIMARY
CONNECTOR (N) (SEMI-OPAQUE).
,IN THIS CONDITION, WHEN THE POWER SWITCH ISTURNED OFF, MAKE SURE THE
POWER ACTUALLY GOES OFF (I.E. THATTHESWITCH WORKS).
\
(N)
SECONDARY (FOOT CONTROL)
*CONNECT A GOOD WORKING FOOT CONTROL AND CHECK THE RESISTANCEOF
THE SECONDARY CONNECTOR (B) (WHITE) WITH THE FOOT CONTROL IN THE UP
POSITION. ABOUT ZERO OHMS ISNORMAL.
.WHEN THE CONTROL IS PRESSEDALL THE WAY DOWN, THEMULTI-METER SHOULD
SHOW ABOUT 10 KILO-OHMS (AFTERA FEWSECONDS).
(B)
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