Lincoln Electric POWER WAVE SVM173-A - Manual (Page 96)

TROUBLESHOOTING & REPAIR
F-50 F-50
POWER WAVE 455M/MSTT Retur
n to Section TOC
Retur
n to Section TOC
Retur
n to Section TOC
Retur
n to Section TOC
Retur
n to Master TOC
Retur
n to Master TOC
Retur
n to Master TOC
Retur
n to Master TOC
INPUT
CONTACTOR
601
X4
FAN MOTOR
LEADS
X3 X5
POWER BOARD
RECTIFIER BRIDGE
X1
X2
+
-
FIGURE F.16 – AUXILIARY TRANSFORMER NO. 1 TEST
AUXILIARY TRANSFORMER NO. 1 TEST (CONTINUED)
TEST PROCEDURE
1. Remove the main input power to the Power
Wave 455 machine.
2. Using the 3/8” nut driver, remove the case
top.
3. Perform the Capacitor Discharge proce-
dure.
4. Locate secondary leads X1 and X2 (at
power board rectifier bridge). Refer to
Figure F.16.
5. Locate secondary leads X3 and X5 (fan
motor leads).
6. Locate secondary lead X4 (at main contac-
tor).