Furuno FS-1570, Service Manual

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Contents
4
Chapter 5. Block Description
5.1 Configuration.................................................................................................................5-1
5.1.1 Transceiver unit ..............................................................................................5-1
5.1.2 Boards in Transceiver unit ..............................................................................5-3
5.1.3 Control unit, FS-2570C...................................................................................5-5
5.1.4 NBDP Terminal unit: IB-581/583 (Option) ....................................................5-6
5.1.5 Antenna coupler unit.......................................................................................5-8
5.2 Power supply unit ..........................................................................................................5-9
5.2.1 General ............................................................................................................5-9
5.2.2 RELAY board (05P0744)................................................................................5-10
5.2.3 SW REG board (05P0737) .............................................................................5-10
5.3 T-CPU board (05P0732)................................................................................................5-11
5.3.1 Function of CPU .............................................................................................5-12
5.3.2 Memory...........................................................................................................5-12
5.3.3 Control signals ................................................................................................5-13
5.3.4 Interface circuit ...............................................................................................5-19
5.3.5 Digital Signal Processor (DSP).......................................................................5-21
5.4 TX/RX Board (05P0733)...............................................................................................5-22
5.4.1 Block diagram .................................................................................................5-22
5.4.2 Local oscillator................................................................................................5-23
5.4.3 Transmitter/Receiver circuit............................................................................5-25
5.5 Power Amplifier (PA)....................................................................................................5-32
5.5.1 FS-1570T PA board (05P0735).......................................................................5-32
5.5.2 FS-2570T DRV board (05P0738) ...................................................................5-34
5.5.3 FS-2570T PA board (05P0739).......................................................................5-35
5.5.4 FS-2570T COMB board (05P0740)................................................................5-36
5.5.5 TX FIL board (05P0736) ................................................................................5-37
5.6 W/R board (05P0734)....................................................................................................5-39
5.7 C-CPU Board (05P0729)/C-IF Board (05P0730)..........................................................5-42
5.7.1 C-CPU Board (05P0729) ................................................................................5-43
1. CPU .............................................................................................................5-43
2. Memory .......................................................................................................5-43
3. LED .............................................................................................................5-43
4. NMI SW ......................................................................................................5-43
5.7.2 C-IF Board (05P0730) ....................................................................................5-44
5.7.3 Handset ...........................................................................................................5-45