Icom IC-725

TABLE
OF CONTENTS
SECTION 1
SPECIFICATIONS
1—1
SECTION 2 INSIDE VIEWS
2
—
1~
2
SECTION
3
BLOCK DIAGRAM
3
—
1
SECTION 4 CIRCUIT
DESCRIPTION
4_1-^7
4
-
1
RECEIVER CIRCUITS
4
—
1
4
-
2 TRANSMITTER CIRCUITS
4
—
4
4-3
PLL
CIRCUITS 4
—
6
4-4
LOGIC CIRCUITS
4
—
7
4
-
5
REGULATOR CIRCUITS
4
—
7
SECTION 5 MECHANICAL
PARTS AND DISASSEMBLY
5
—
1-7
5-1
FRAME DISASSEMBLY
'.
5—1
5-2
PA UNIT AND ACCESSORIES
5
—
3
5
-
3
FRONT AND PLL UNITS CONNECTOR
ASSEMBLY 5
—
5
5
-
4
FRONT AND MAIN
UNITS CONNECTOR ASSEMBLY 5
—
6
5-5
PA AND FILTER UNITS
CONNECTOR ASSEMBLY 5
—
7
SECTION 6 ADJUSTMENT
PROCEDURES
6
—
1-7
6
-
1 PREPARATION BEFORE SERVICING;
6
—
1
6-2
PLL
ADJUSTMENT
6
—
2
6-3
RECEIVER ADJUSTMENT
6
—
4
6
-
4
TRANSMITTER ADJUSTMENT
6
—
6
SECTION
7 BOARD LAYOUTS
7-1-5
7-1
FRONT
UNIT
7
-
2 MAIN UNIT
7-3
PLL
UNIT
7-4
PA
UNIT
7-5
DDSUNIT
7-6
AM
•
FM UNIT (OPTIONAL)
SECTION 8 PARTS LIST
8
—
1-13
SECTION
9 VOLTAGE DIAGRAMS
9
—
1-2
9-1
FRONT AND
MAIN
UNITS
9
—
1
9-2
PLL AND PA
UNITS 9
—
2