Lincoln Electric RANGER 3PHASE SVM207-A Service Manual page 55

F-17
AUXILIARY AND FIELD WINDING TEST (continued)
X5
C
R16
X4
J2
FIELD WINDING
1. Remove the fuel cap and lift bail rubber gasket.
With a 5/16" nut driver or socket, remove the case
top and left side; then reinstall the fuel cap.
2. Connect the volt/ohmmeter probes to leads #7 and
#9 where they connect to the Control P.C. Board.
3. Start the engine and run it at high idle (3700 RPM).
4. Set the output control to the maximum position
(position 10).
5. Check the AC voltage reading.
between 41 and 45 VAC.
If any one or more of the readings are missing or not
within specifications, then check for loose or broken
wires between the test points and the stator windings.
See the Wiring Diagram. Make sure the windings are
NOT grounded internally to the stator iron. If the leads
are intact, then the stator may be faulty. Replace the
stator.
If the voltage readings are within specifications, then
the windings are good and functioning properly.
6. Reinstall the case side, case top, fuel cap, and lift
bail gasket
TROUBLESHOOTING AND REPAIR
FIGURE F.4 – CONTROL PC BOARD
Lead #219 (J1, Pin 5)
CONTROL
1 6
J1
7 12
R95
X3
R94
R41
R7
D
R34
R43
R49
R32 D3
C26
R23
R57
R47
R56
C27
Q6 Q3
Q1
A
DZ7
R83
X1
R84
C4
C7
R85
It should be
RANGER® 3 PHASE
B2
B
D10
L12198-1
R71
TP1
R72
R73
TP2
R74
R62
R67
R68
R69
R70
FTP1
C36
B1
R5 R88
D9
Q4
F-17
FIELD VOLTAGE
(Leads #7 & #9)