Olivetti DF-790 Service Manual page 90

3. Remove all connectors from the DF
main PWB.
4. Remove six screws.
5. Remove the DF main PWB.
6. Check or replace the DF main PWB
and refit all the removed parts.
CAUTION:when replacing the DF main
PWB, remove the EEPROM (U2) from
the DF main PWB that has been
removed and then reattach it to the new
DF main PWB.
Service Manual
Screw
Screw
1
1 4
20
YC12
YC3
YC1
1 5
YC2
1 5
Figure 1-5-3
1-5-3
3NB/3ND/3N0/3NK
Screw Screw
DF main PWB
13 1
13
YC18
YC17
U2
YC23
1
X1
Screw
Screw
Screw
1 2
YC16
18
Y113480-7