Siemens 2000 Service Manual page 8

The symbols on inscription plate b (Fig. 4) ind1cate the positions to which head
selector a should be set for the various tracks.
~
c
0
Caution
This position is for scanning a 2.5 mm magnetic track. Magnetic
head c (Fig. 7) will here lie against the track.
This position is for scanning optical sound. All magnetic heads are
pivoted away from the film so that they cannot scratch the optical
track.
In this position magnetic head c (Fig. 7) lies against the film and the
exciter lamp is switched on for optical/magnetic transfer.
To prevent damage to the optical sound track, optical sound film must
not be projected unless the white index mark is on the right.
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