Furuno FAR-2107 Series Service Manual page 127

2. Short pulse and V TRIG signal ...................................................................7-10
3. TX PROTECT signal ..................................................................................7-10
4. RF circuit ....................................................................................................7-11
7.2.3 IF board (03P9335) ........................................................................................7-13
7.2.4 B.P GEN board (03P9347) ............................................................................7-16
1. B.P signal ....................................................................................................7-16
2. HD signal ....................................................................................................7-17
7.2.5 PWR (RF) board (03P9348) ..........................................................................7-18
7.2.6 MSS board (MSS7497) .................................................................................7-21
7.2.7 Turning operation ..........................................................................................7-23
1. Automatic tuning operation ........................................................................7-23
2. Manual tuning .............................................................................................7-24
3. Tuning indicator presentation .....................................................................7-24
7.2.8 Automatic STC (SEA AUTO) .......................................................................7-25
7.3 Processor Unit (RPU-013) .......................................................................................7-27
7.3.1 Overview .......................................................................................................7-27
7.3.2 TB board (03P9342) ......................................................................................7-28
1. Block diagram .............................................................................................7-28
2. Connector ....................................................................................................7-30
7.3.3 SPU board (03P9337) ....................................................................................7-32
1. Block diagram .............................................................................................7-32
2. IF-VIDEO MIX signal input ......................................................................7-35
3. Structure of screen ......................................................................................7-36
7.3.4 Signal processing ...........................................................................................7-37
1. Echo trail processing: [TRAIL] menu ........................................................7-38
2. Wiper processing (WIPER) ........................................................................7-39
3. Zoom ...........................................................................................................7-41
4. Signal processing of [PICTURE] menu .....................................................7-41
5. Examples of factory setting for each "Picture" ..........................................7-51
7.3.5 Power board ...................................................................................................7-63
1. Power supply specifications .......................................................................7-63
2. Block diagram of power board ...................................................................7-64
3. Block description of AC power board (03P9339) ......................................7-66
4. Block description of DC power board (03P9338) ......................................7-68
5. Power-on of monitor unit (MU-201CR, MU-231CR) ................................7-68
7.3.6 TX-HV board (HV-9017) ..............................................................................7-69
7.3.7 NET-100 board (03P9332) ............................................................................7-70
7.4 Control Unit .............................................................................................................7-71
7.5 Monitor Unit ............................................................................................................7-73
7.5.1 Overview .......................................................................................................7-73
7.5.2 Block diagram of monitor unit ......................................................................7-74
1. MU-201CR .................................................................................................7-74
2. MU-231CR .................................................................................................7-75
7.5.3 List of monitor units ......................................................................................7-76
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