2-14
Antenna on/off Control
The SPU board produces the antenna on/off signal. The PWR board monitors the number of the bearing pulse from the scanner unit and
changes motor control voltage to maintain the constant speed of antenna rotation. The voltage between #1/#2 and #3/#4 of J103 is about
30 VDC with the scanner unit disconnected.
To rotate the antenna, the followings must be satisfied.
1) TX key pressed
2) #A6 of P551on the SPU board is “high”
3) #7 of J103 on the PWR board is “high”
4) 14 to 24 V derived from #1/#2 and #3/#4 of J103 on the PWR board
Figure 2.11 Antenna on/off Control
A6
P551
G/A
U35
TX Key
TX
F
H
STBY
F
L
03P9253(SPU Board)
17
P313
ANT SW
PAL Bord
17
ANT ON/OFF
S 1
B18
J312
03P9255
B19
2
3
J313
A6
J551
03P9251
7
A18
A17
J412
C8
#16
#1
#32
J415
J417
7
J103
TX
F
H
STBY
F
L
03P9245(PWR Board)
5
P417
03P9252(INT Board)
5
J467
For TX/RX down
ANT ON/OFF
E
FR-2135S
E
FR-2135SW
E
FR-2165DS
E
FR-2125W
E
FR-2155
03P9254
PANEL Board MOTER Board
5
ANT.
SPEED
5
6
BP
(From RF Unit)
6
22
DJ1
J551
A5
P551
G/A
U35
03P9253
#16
#4
#17
SPU Board
A5
U20
U57
#18
#46
U51
FR2115-SME-10C
Soft start
control
Comparator
Chopper
Control
Chopper
Q94
U92
CR94,Q97
F/V
Converter
U93
1,2
3,4
J103
MOTOR(+),
MOTOR(-)
E
FR-2115
E
FR-2125
*DC14 to 24 V(With ANT)
DC30 V(With out ANT)
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