Repairs: Information and Instructions 23
4. Refit the cover plate 48.
Note that there is a projecting lug on the back
of the cover plate. Be sure to fit the cover plate
so that this lug locates the muffler in position.
5. Perform a functional check (see ”6.2 Perform-
ing the functional check“ on page 8).
8.15 Electrical circuit diagram
projecting lug
48
Power pack,
lead-cell
WM 10747
+
-
X1
X2
4
3
2
1
X1
X2
X3
red
black
Membrane keyboard,
Basic
Vacuum pump
WM 10674
Printed circuit board
WM 10780
red
black
red
black