Yaesu FT-901DM Maintenance Service Manual page 60

AM/CW FILTER INSTALLATION
Remove the top cover. Locate and remove PB-
1716 (FILTER UNIT). Referring to Fig. 1, locate
jumpers A and B on the printed board. If the AM
filter is to be installed, the jumper marked A
must be installed, and for CW filter installation
the jumper marked B must be removed.
Referring to Figs. 1 and 2, install the desired
filter in the appropriate holes. Make the fastening
nuts snug (CW filter only), and solder the pins of
the filter to the printed board.
Re-install PB-1716 in the chassis socket, and re-
place the cover of the transceiver.
Cw FILTER
Lock Washer
'SpringWasher
Nut
Figure 2
SERVICING
Figure 1
8S300601ZG x8
TOP VIEW