VHF FM TRANSCEIVERS
SERVICE MANUAL
REPAIR NOTES
INTRODUCTION
DANGER
ORDERING PARTS
TABLE OF CONTENTS
EIA/TIA
SPECIFICATIONS
SECTION
ETS 300
MAIN UNIT TOP VIEW
SECTION 2 INSIDE VIEWS
BOTTOM VIEW
REMOVING THE MAIN UNIT
SECTION 3 DISASSEMBLY AND OPTION INSTRUCTIONS
3-1 DISASSEMBLY INSTRUCTION
REMOVING THE CHASSIS PANEL
Remove the option cover
3-2 OPTIONAL UNIT INSTALLATIONS
4-1-2 RF CIRCUIT
SECTION 4 CIRCUIT DESCRIPTION
4-1 RECEIVER CIRCUITS
4-1-1 ANTENNA SWITCHING CIRCUIT
4-1-5 AF CIRCUIT
4-2 TRANSMITTER CIRCUITS
4-1-7 WIDE AND NARROW SWITCHING CIRCUIT
4-2-3 DRIVE/POWER AMPLIFIER CIRCUITS
LINE
4-3 PLL CIRCUIT
4-4 POWER SUPPLY CIRCUITS VOLTAGE LINE
PLL circuit
4-5-2 OUTPUT EXPANDER IC IC10
4-5 PORT ALLOCATIONS
4-5-1 CPU IC8
CPU IC8-continued
ADJUSTMENT SOFTWARE INSTALLATION
SECTION 5 ADJUSTMENT PROCEDURES
5-1 PREPARATION
STARTING SOFTWARE ADJUSTMENT
CS-F3G ADJ Rev.2.0
RF Power High
Screen display exampe
¥ JIG cable
Top view
¥ DC power cable connections
Connection
ADJUSTMENT
5-2 PLL ADJUSTMENT
ADJUSTMENT
ADJUSTMENT CONDITIONS
MEASUREMENT
5-3 SOFTWARE ADJUSTMENT
ADJUSTMENT
ADJUSTMENT CONDITION
MEASUREMENT
SOFTWARE ADJUSTMENT - continued
ADJUSTMENT
ADJUSTMENT CONDITION
ORDER
SECTION 6 PARTS LIST
MAIN UNIT
MAIN UNIT
DESCRIPTION
MAIN UNIT
MAIN UNIT
ORDER
DESCRIPTION
MAIN UNIT
MAIN UNIT
ORDER
DESCRIPTION
MAIN UNIT
MAIN UNIT
ORDER
ORDER
MAIN UNIT
MAIN UNIT
CHASSIS UNIT
MAIN UNIT
SECTION 7 MECHANICAL PARTS AND DISASSEMBLY
ACCESSORIES
CHASSIS PARTS
UNIT abbreviation C CHASSIS PARTS, M MAIN UNIT
IC-F3GS parts
TRANSISTOR AND FET’S
SECTION 8 SEMI-CONDUCTOR INFORMATION
DIODES
9-1 GENERAL AND EIA/TIA VERSIONS EXCEPT W/N-TYPE
SECTION 9 BOARD LAYOUTS
MAIN UNIT TOP VIEW
ICOM
R143
OPTION
B5386H
MAIN UNIT TOP VIEW
9-2 ETS/CEPT VERSION
to the OPTIONAL unit
B5571C
R143
ICOM
MAIN UNIT TOP VIEW
VHF W/N
DS1 C255
9-3 W/N-TYPE
ICOM
B5687A
BUSY
OPTION
MAIN UNIT
10-1 PARTS LIST
10-2 DISASSEMBLY INFORMATION
SECTION 10 BC-137 OPTIONAL DESKTOP CHARGER INFORMASION
RN2404
10-3 VOLTAGE DIAGRAM
10-4 BOARD LAYOUT
2SB1201 S
W-type of GEN
SECTION 11 BLOCK DIAGRAM
W/N-type
ETS/CEPT version
SECTION 12 VOLTAGE DIAGRAM
A L-band of ETS/CEPT version
Page
P86/AN6 P87/AN7
VOLTAGE DIAGRAM
SECTION
P81/AN1 P82/AN2 P83/AN3 P84/AN4 P85/AN5
Page
S-13713IZ-C1V
1-1-32, Kamiminami, Hirano-ku, Osaka, 547-0003, Japan
2000 Icom Inc
SERVICE MANUAL
UHF FM TRANSCEIVERS
REPAIR NOTES
INTRODUCTION
DANGER
ORDERING PARTS
TABLE OF CONTENTS
EIA/TIA
SPECIFICATIONS
SECTION
ETS 300
BOTTOM VIEW
Antenna switcing circuit D2, D8 MA77 Power amplifier Q1 2SK2974 APC
SECTION 2 INSIDE VIEWS
MAIN UNIT TOP VIEW
REMOVING THE MAIN UNIT
SECTION 3 DISASSEMBLY AND OPTION INSTRUCTIONS
3-1 DISASSEMBLY INSTRUCTION
REMOVING THE CHASSIS PANEL
1 Remove the option cover
3-2 OPTIONAL UNIT INSTALLATIONS
3 Replace the option cover to the chassis-hole
4-1-2 RF CIRCUIT
4-1-1 ANTENNA SWITCHING CIRCUIT
SECTION 4 CIRCUIT DESCRIPTION
4-1 RECEIVER CIRCUITS
4-1-5 AF CIRCUIT
4-1-7 WIDE AND NARROW SWITCHING CIRCUIT
4-2-3 DRIVE/POWER AMPLIFIER CIRCUITS
4-2 TRANSMITTER CIRCUITS
LINE
4-4 POWER SUPPLY CIRCUITS VOLTAGE LINE
4-3 PLL CIRCUIT
PLL CIRCUIT
4-5-2 OUTPUT EXPANDER IC IC10
4-5 PORT ALLOCATIONS
4-5-1 CPU IC8
CPU IC8-continued
5-1 PREPARATION
SECTION 5 ADJUSTMENT PROCEDURES
STARTING SOFTWARE ADJUSTMENT
ADJUSTMENT SOFTWARE INSTALLATION
JIG CABLE
SCREEN DISPLAY EXAMPLE
SQL Lev
computer
DC POWER CABLE CONNECTIONS
Top view
CONNECTION
ADJUSTMENT
5-2 PLL ADJUSTMENT
ADJUSTMENT
ADJUSTMENT CONDITIONS
MEASUREMENT
5-3 SOFTWARE ADJUSTMENT
ADJUSTMENT
ADJUSTMENT CONDITION
MEASUREMENT
SOFTWARE ADJUSTMENT - continued
ADJUSTMENT
ADJUSTMENT CONDITION
ORDER
SECTION 6 PARTS LIST
MAIN UNIT
MAIN UNIT
DESCRIPTION
MAIN UNIT
MAIN UNIT
ORDER
DESCRIPTION
MAIN UNIT
MAIN UNIT
ORDER
DESCRIPTION
MAIN UNIT
MAIN UNIT
ORDER
DESCRIPTION
MAIN UNIT
MAIN UNIT
ORDER
ORDER
MAIN UNIT
DESCRIPTION
MAIN UNIT
SECTION 7 MECHANICAL PARTS AND DISASSEMBLY
ACCESSORIES
CHASSIS PARTS
EP2 M MAIN unit
IC-F4GS parts
TRANSISTOR AND FET’S
SECTION 8 SEMI-CONDUCTOR INFORMATION
DIODES
MAIN UNIT TOP VIEW
9-1 LOW BAND
SECTION 9 BOARD LAYOUTS
U H F
R143
U H F
9-2 440-470 MHz BAND EXCEPT W/N-TYPE
MAIN UNIT TOP VIEW
ICOM
MAIN UNIT TOP VIEW
9-3 470-500 MHz AND HIGH BANDS
the OPTIONAL unit
J5 to
MAIN UNIT TOP VIEW
9-4 W/N-TYPE
R143
MAIN UNIT
10-1 PARTS LIST
10-2 DISASSEMBLY INFORMATION
SECTION 10 BC-137 OPTIONAL DESKTOP CHARGER INFORMASION
10-4 BOARD LAYOUT
10-3 VOLTAGE DIAGRAM
N-type
SECTION 11 BLOCK DIAGRAM
W/N-type
W-type of GEN
Tx 4.84
VOLTAGE DIAGRAM
SECTION
Tx 2.19
47 P
47 P OTHER
BDET PTT CTCIN CPU5
VOLTAGE DIAGRAM
SECTION
CPU5 DTMF MTONE CPU5
Page
S-13713IZ-C1U
1-1-32, Kamiminami, Hirano-ku, Osaka, 547-0003, Japan
2000 Icom Inc
