.-#--:
')
(2) ln the Antenna Tuner Mode
(
R:Receivi!l& )
T:Transffilttmg
J1
KI
(3) ln the Linear Amplifier Mode
(R:Receiving )
T:Transmitting
R
J1
T
KI
2.6 CDJ-1143 Control Circuit
K2
~
ANTI
o---e
ANT2
~
ANT3
0----0
ANT4
K4toK7
Fig.7
ANTI
ANT2
ANT3
o---e
ANT4
K4toK7
Fig.8
The CDJ-1143 control circuit is on the printed circuit bdard attached
to
the upper part
of the JRL-2000F. lt incorporates an 8-bit microprocessor and controls the JRL-2000F
and monitors its operation.
(1
)Microprocessor Circuit
IC1
is
an 8-bit single-chip CPU and equipped with
1/D
ports, a timer, random access
memories and serial communication terminals.
Control programs are stored in ROM1.
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