Table Of Contents - Icom IC-PW1 Service Manual

SECTION 1 SPECIFICATIONS
SECTION 2 INSIDE VIEWS
SECTION 3 CIRCUIT DESCRIPTION
3-1 LINEAR AMPLIFIER CIRCUITS............................................................................................................ 3-1
3-2 ANTENNA TUNER CIRCUITS .............................................................................................................. 3-2
3-3 PROTECTION CIRCUITS ..................................................................................................................... 3-3
3-4 POWER SUPPLY CIRCUITS ............................................................................................................... 3-4
3-5 PORT ALLOCATIONS .......................................................................................................................... 3-4
3-6 PX-1981 POWER SUPPLY CIRCUITS ................................................................................................. 3-7
SECTION 4 ADJUSTMENT PROCEDURES
4-1 PREPARATION ..................................................................................................................................... 4-1
4-2 PA AND FRONT UNITS ADJSTMENT .................................................................................................. 4-2
4-3 MAIN UNIT ADJUSTMENT ................................................................................................................... 4-4
4-4 PX-1981 PREPARATION .................................................................................................................... 4-10
4-5 SUBREG BOARD ADJUSTMENT....................................................................................................... 4-10
4-6 ACTFIL BOARD ADJUSTMENT.......................................................................................................... 4-11
4-7 CONV-CTRL BOARD ADJUSTMENT ................................................................................................. 4-12
SECTION 5 PARTS LIST
SECTION 6 MECHANICAL PARTS AND DISASSEMBLY
SECTION 7 SEMI-CONDUCTOR INFORMATION
SECTION 8 BOARD LAYOUTS
IC-PW1 BOARD LAYOUTS
8-1 ANT-SW UNIT ....................................................................................................................................... 8-1
8-2 C-NET BOARD ...................................................................................................................................... 8-1
8-3 L-NET BOARD ...................................................................................................................................... 8-2
8-4 H-NET BOARD ...................................................................................................................................... 8-2
8-5 CONNECT BOARD ............................................................................................................................... 8-3
8-6 COMBINR UNIT .................................................................................................................................... 8-4
8-7 SPLITR UNIT......................................................................................................................................... 8-5
8-8 PA UNIT ................................................................................................................................................. 8-6
8-9 DET BOARD.......................................................................................................................................... 8-7
8-10 JACK-1 UNIT......................................................................................................................................... 8-8
8-11 SW BOARD ........................................................................................................................................... 8-9
8-12 FILTER UNIT ....................................................................................................................................... 8-11
8-13 MAIN UNIT .......................................................................................................................................... 8-13
PX-1981 BOARD LAYOUTS
8-14 SUBREG BOARD................................................................................................................................ 8-15
8-15 CONV BOARD .................................................................................................................................... 8-16
8-16 CONV-CTRL BOARD .......................................................................................................................... 8-17
8-17 CONNECT BOARD ............................................................................................................................. 8-18
8-18 ACTFIL BOARD................................................................................................................................... 8-19
8-19 FIL-AC BOARD ................................................................................................................................... 8-20
8-20 FIL-DC BOARD ................................................................................................................................... 8-21
8-21 REGRELAY BOARD............................................................................................................................ 8-22
8-22 ACT-C BOARD .................................................................................................................................... 8-23
SECTION 9 BLOCK DIAGRAM
SECTION 10 VOLTAGE DIAGRAM
IC-PW1 VOLTAGE DIAGRAM
10-1 WIRING DIAGRAM ............................................................................................................................. 10-1
10-2 SPLITR, PA, AND COMBINR UNITS .................................................................................................. 10-2
10-3 FILTER UNIT ....................................................................................................................................... 10-3
10-4 PA UNIT ............................................................................................................................................... 10-4
10-5 FRONT UNIT ....................................................................................................................................... 10-5
10-6 MAIN UNIT .......................................................................................................................................... 10-6
10-7 TUNER UNIT....................................................................................................................................... 10-7
PX-1981 VOLTAGE DIAGRAM
10-8 WIRING DIAGRAM ............................................................................................................................. 10-8
10-9 SUBREG BOARD................................................................................................................................ 10-9
10-10 CONV-CTRL BOARD ........................................................................................................................ 10-10
10-11 ACTFIL BOARD................................................................................................................................. 10-11
10-12 CONV BOARD .................................................................................................................................. 10-12
10-13 CONNECT BOARD ........................................................................................................................... 10-13
10-14 FIL-AC BOARD ................................................................................................................................. 10-14
10-15 FIL-DC BOARD ................................................................................................................................. 10-14
10-16 REGRELAY BOARD.......................................................................................................................... 10-15
10-17 ACT-C BOARD .................................................................................................................................. 10-15

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