Furuno FAR-2807 Series - MD Board (03 P9244)

7.2 Antenna Unit
7-8
Q5, 6
Q9, 10
Q13, 14
Q17, 18
Q7, 8
Q11, 12
Q15, 16
Q19, 20
Q1
Q2
Q3
Q4
CR1, 2
R41, 42
C1 - 4
R1, 2
R3, 4
R40
L1
K1
+12V
K4
+12V
+12V
VR1
TRIG. 1
TRIG. 2
TRIG. 3
TRIG. 4
V TRIG
TRIG. 1
TRIG. 2
TRIG. 3
TRIG. 4
TX Pulse
TX-HV
TX PROTECT
S
HEATER
HEATER
Short Pulse(S1)
SW REG.
(U1, Q23,
CR4, CR4)
L3
(Filter)
MAG. Current
Short Pulse Long PulseMiddle Pulse
TX-HV
TX-Pulse
L4
+
+
+
=
[J814]
[J811]
[J812-10]
[J812-1]
[J812-2]
[J812-3]
[J812-4]
[J812-5]
[J812-6]
[J812-9]
Short Pulse(S2)
[J812-2]
[J812-12/13]
[J812-11]
[J813-1]
[J813-2]
U2/Q21
7.2.2 MD board (03P9244)
The MD boards have no compatibility because the part parameters are different
according to the types.
Table 7.2.2 Types of MD boards
Types of
MD board
Remarks
03P9244A For X-band, 12 kW (RTR-078)
03P9244B For X-band, 25 kW (RTR-079, 81)
03P9244E For S-band, 30 kW (RTR-080, 82)
Mag.
RFC
(03P9346A)
TX-HV PROTECT
TRIG
TRIG
TRIG
TRIG
HEATER
MD
(03P9244)
MAG. Current
Short
TX-HV
PULSE
Transformer
V TRIG
HEATER
TX-HV
TX data
RX data
Fig. 7.2.3 Connection of RFC/MD board
Fig. 7.2.4 Block diagram of MD board