Yamaha SIGMA-G5SII Service Information page 105

Set the dial stand set plate on the head plate assembly. Set the straight edge on the
surface plate and measure the parallelism in the directions Z and Y.
* Standard Range: Within 0.04mm (Refer to the following figure for the measurement
procedure).
* Standard Range: 1000g or less
From the beam center
position to the component
placement level (200mm)
Direction Y
Straight Edge
From the surface plate to
the DD center (84.5mm)
Surface Plate
Fig.C40
105/273
For Service Engineer
Service Information
Direction Z
SI1705004E-00=SIGMA-G5SII Service Manual