Yaesu FT-901DM Maintenance Service Manual page 42

CARRIER UNIT (PB-1706)
The carrier oscillator Q792 (2SK19GR) is followed
by a buffer amplifier Q793 (2SC1815Y). It oscil-
lates at one of the following frequencies, depend-
ing on the mode of operation: 8989 kHz with
X702; 8986 kHz with X79; ; or 8988.295 kHz with
X703- The
crystal selection
is made
by diode
switches D7; - D793 (181555).
Diode Do, conducts to activate X73, which is
used for the CW, FSK, AM, and TUNE
transmit
signal. Diode D792 conducts to activate X79, for
LSB and FSK reception. Diode D793 conducts to
activate X79) for USB and CW reception.
7%)
) cwrRa)
) Ske th)
TECHNICAL NOTES
2-15