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