Nelson ALPHA 850 - Page 59

9 Repairs Page 54
Stud welding unit operating manual Date: July 2021
ALPHA 850 07.2021 / EN Rev.: A
F1 – F3: Fuse elements
X1 – X4: Plug connection
H2 – H18: Diagnostic LEDs
Internal control card (example illustration)
F1
X4
X1
X2
X3
H9-
H14
H7
F3
H5
H18
H3
H2
H4
F2
H8