Ericsson GF 768 Troubleshooting Manual page 31

4/00021-2/FEA 209 544/6 C
Fig. 6.6 shows the measuring point for VDSP. The picture shows 3 different locations where the VDSP regulator
could be placed.
At the 2/ROA 119 3283/7 (R2A) and the 2/ROA 117 3748/2 (all revisions) boards the measuring point is placed
outside the DSP shielding and is easily accessed.
At the 2/ROA 119 3283/7 (all R4 revisions) and 2/ROA 117 3632/1 (all revisions) boards the measuring point is
placed inside the DSP shielding E203. You must use a thin (preferably isolated) probe and measure through one of
the holes as in fig. 6.7.
Fig. 6.9 shows the measuring point for VRAD.
Fig. 6.5
Fig. 6.6
Fig. 6.7
Troubleshooting guide
31