MODEL 8559A
SERVICE
ALTERNATE
IF DRIVERS
TUNE/FULL SPAN VOLTAGE
COARSE TUNE
YTO
MAIN COIL ORIVER
SUMMING DRIVER
tsv
-
>
I
-
!
FS6
YOR
-
I
YTO FW COIL DRIVER
'
-1OV
-
VOLTAGE
1
TUNE REF
'
REGULATOR tj4.s~
tisv
:
I,,-,,-
FIGURE 827. FREQUENCY CONTROL ASSEMBLY A7, BLOCK DIAGRAM