Figure f.77, Troubleshooting & repair, Warning – Lincoln Electric INVERTEC POWER WAVE 450 SVM112-B User Manual
Page 261
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MAKE SURE FILTER CAPACITORS ARE
DISCHARGED
1. Construct a 115VAC pretest power supply
as per Figure F.78 using the following:
Switch (SPST)
Fuse (5 amp max)
P70 adapter
ALL AC SUPPLIES MUST BE ELECTRICAL-
LY ISOLATED (isolation transformers). THE
PRINTED CIRCUIT BOARDS WILL
BE
DAMAGED IF THE AC SUPPLIES ARE NOT
ISOLATED.
WARNING
TROUBLESHOOTING & REPAIR
F-201
F-201
POWER WAVE 450
PRE-POWERUP SWITCH BOARD TEST PROCEDURE
FOR REPLACEMENT OF SWITCH ASSEMBLY G2402-2 (continued)
9L
400 VDC
VOLTMETER
R 9
12L
+
9M
400 VDC
VOLTMETER
R 10
12M
+
WARNING
FIGURE F.77 - FILTER CAPACITOR VOLTAGE
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