Lincoln Electric INVERTEC POWER WAVE 450 SVM112-B Service Manual page 261

F-201
PRE-POWERUP SWITCH BOARD TEST PROCEDURE
FOR REPLACEMENT OF SWITCH ASSEMBLY G2402-2 (continued)
400 VDC
VOLTMETER
400 VDC
VOLTMETER
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
TROUBLESHOOTING & REPAIR
FIGURE F.77 - FILTER CAPACITOR VOLTAGE
+
+
WARNING
POWER WAVE 450
R 9
9L
12L
R 10
9M
12M
WARNING
ALL AC SUPPLIES MUST BE ELECTRICAL-
LY ISOLATED (isolation transformers). THE
PRINTED CIRCUIT BOARDS WILL BE
DAMAGED IF THE AC SUPPLIES ARE NOT
ISOLATED.
F-201