Description of boards 23
9.2.3) BOARD 15.14.250 "POWER INVERTER SECTION" (fig. 19)
Full-bridge power inverter
WARNING:
before taking measurements described,
open solder-jumper K2 with the machine unplugged!
Note:
solder-jumper K2 causes a break in the inverter's power supply circuit and is normally closed (it may be opened to test
the power source; also see chapter 10 below)
Power source / Mode
Component
V S G
V S D
OFF
MF11
+0.25 Vdc
+0.36 Vdc
OFF
MF12
+0.25 Vdc
+0.36 Vdc
OFF
MF15
+0.25 Vdc
+0.36 Vdc
OFF
MF16
+0.25 Vdc
+0.36 Vdc
Power source / Mode
LED
Status
ON / TIG 2T*
L13
ON (with torch trigger pulled)
ON / TIG 2T
L14
ON (with torch trigger pulled)
ON / TIG 2T
L15
ON (with torch trigger pulled)
ON / TIG 2T
L16
ON (with torch trigger pulled)
Unless otherwise specified, all measurements sholud be taken with the boards in their slots and connected accordingly
* Note:
TIG 2T = 2 STROKE TIG (see owner's manual)
