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