24
Description of boards
9.2.4) BOARD 15.14.250 "WELDING CURRENT CONTROL SECTION" (fig. 20)
Analogue adjustment circuits: control welding current (relevant logic system is located in panel board 15.14.236).
WARNING:
before taking measurements described, wait 5 minutes after switching off the power source and - with the
machine unplugged -
close solder-jumper K2!
Note:
solder-jumper K2 enables a limitation of the power source's open circuit voltage OCV, and is normally open (can be fac-
tory set only).
Power source / Mode
LED / Test point
Value
Notes
ON
L 12
OFF
Thermal cutout
ON / MMA
L 11
ON
"Pot" signal
ON / MMA
TP26 TP15
- 4.3Vdc
Voltage feedback
(NO LOAD)
Unless otherwise specified, all measurements sholud be taken with the boards in their slots and connected accordingly
