Furuno FAR-2107 Series Service Manual page 413

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