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Make/Model Information:

  • Brand:   Icom
  • Models included:
    • Icom IC-F510
    • Icom IC-F520
    • Icom IC-F521

File Information:

  • Type:   Factory Service Manual (FSM)
  • Language:   English (EN)
  • Number of pages:   36
  • File size:  ∼ 3.50 MB
  • File Format:   PDF only
  • SME Watermarks:   None
  • Password lock:   No
  • Edit/copy/modify:   Yes
  • SKU:   ROIC-0089

NOTE:  This list was created by program script and may not accurately represent the text from the source pages.   For full preview please click on 'Download sample':

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SERVICE
MANUAL
VHF TRANSCEIVER
VERSION
Europe
General
U.S.A.
General
SYMBOL
INTRODUCTION
This service manual describes the latest service information
for the IC-F510, IC-F520 and IC-F521 VHF TRANSCEIVERS
at the time of publication.
DANGER
NEVER connect the transceiver to an AC outlet or to a DC
power supply that uses more than 16 V. This will ruin the
transceiver.
DO NOT expose the transceiver to rain, snow or any liquids.
DO NOT reverse the polarities of the power supply when
connecting the transceiver.
DO NOT apply an RF signal of more than 20 dBm (100 mW)
to the antenna connector. This could damage the transceiv-
er’s front end.
ORDERING PARTS
Be sure to include the following four points when ordering
replacement parts:
1. 10-digit order numbers
2. Component part number and name
3. Equipment model name and unit name
4. Quantity required

1110003490 S.IC TA31136FN IC-F510 MAIN UNIT 5 pieces
8810009990 Screw PH BT M3×8 ZK IC-F520 Bottom cover 10 pieces
Addresses are provided on the inside back cover for your
convenience.
REPAIR NOTES
1. Make sure a problem is internal before disassembling the
transceiver.
2. DO NOT open the transceiver until the transceiver is
disconnected from its power source.
3. DO NOT force any of the variable components. Turn
them slowly and smoothly.
4. DO NOT short any circuits or electronic parts. An insu-
lated tuning tool MUST be used for all adjustments.
5. DO NOT keep power ON for a long time when the trans-
ceiver is defective.
6. DO NOT transmit power into a signal generator or a
sweep generator.
7. ALWAYS connect a 50 dB to 60 dB attenuator between
the transceiver and a deviation meter or spectrum ana-
lyzer when using such test equipment.
8. READ the instructions of test equipment thoroughly
before connecting equipment to the transceiver.
IC-F510
IC-F520
IC-F521
To upgrade quality, any electrical or mechanical parts and
internal circuits are subject to change without notice or
obligation.
TABLE OF CONTENTS
SECTION 1 SPECIFICATIONS
SECTION 2 INSIDE VIEW
SECTION 3 DISASSEMBLY INSTRUCTIONS
SECTION 4 CIRCUIT DESCRIPTION
4 - 1 RECEIVER CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 1
4 - 2 TRANSMITTER CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 2
4 - 3 PLL CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 3
4 - 4 POWER SUPPLY CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 4
4 - 5 PORT ALLOCATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 4
SECTION 5 ADJUSTMENT PROCEDURES
5 - 1 PREPARATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 1
5 - 2 PLL ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 3
5 - 3 SOFTWARE ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 4
SECTION 6 PARTS LIST
SECTION 7 MECHANICAL PARTS
SECTION 8 SEMI-CONDUCTOR INFORMATION
SECTION 9 BOARD LAYOUTS
9 - 1 FRONT UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 - 1
9 - 2 MAIN UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 - 3
SECTION 10 BLOCK DIAGRAM
SECTION 11 VOLTAGE DIAGRAMS
11 - 1 FRONT UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 - 1
11 - 2 MAIN UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 - 2
EXPLICIT DEFINITIONS
136 – 174 MHz
FREQUENCY COVERAGE
12.5 kHz / 25.0 kHz
15.0 kHz / 30.0 kHz
12.5 kHz / 20.0 kHz
Narrow/Wide-type
Narrow/Middle-type
CHANNEL SPACING
SECTION 1 SPECIFICATIONS
All stated specifications are subject to change without notice or obligation.
Measurement method
Frequency coverage
Type of emission
Number of conventional channels
Power supply voltage (negative ground)
Current drain (approx.)
Frequency error
Usable temperature range
Dimensions (proj. not included)
RF output power
Modulation system
Maximum permissible deviation
Spurious emissions
Adjacent channel power
Audio frequency response
Audio hormonic distortion
FM hum and noise (typical)
(without CCICT filter)
Residual modulation (typical)
(with CCICT filter)
Limitting charact of modulator
Microphone connector
Receive system
Intermediate frequencies
Sensitivity (typical)
Squelch sencitivity (at threshold) (typical)
Adjcent channel selectivity (typical)
Spurious response
Intermoduration (typical)
Hum and noise (without CCITT filter)
(typical) (with CCITT filter)
Audio output power
External SP connector
USA/GEN EUR
RECEIVER TRANSMITTER GENERAL
EIA-152-C/204D or TIA-603 ETS 300 086
136.000–174.000 MHz
N/W (15 kHz; Narrow/30 kHz; Wide): 8K50F3E/16K0F3E [USA],
N/W (12.5 kHz; Narrow/25 kHz; Wide): 8K50F3E/16K0F3E [EUR]/[GEN],
N/M (12.5 kHz; Narrow/20 kHz; Middle): 8K50F3E/14K0F3E [EUR]
Max. 256 ch (16 channels × 16 banks)
13.6 V DC nominal 13.2 V DC nominal
TX (at 25 W) 7.0 A [25W], (at 50 W) 13.0 A [50W]
Rx (max. audio) 1200 mA
(stand-by) 300 mA
5.0 ppm ±1.5 kHz
–30°C to +60°C (–22°F to +140°F) –25°C to +55°C (–13°F to +131°F)
140(W) × 40(H) × 170(D) mm; 51/2(W) × 19/16(H) × 611/16(D) inch
1.2 kg; 2 lb 10 oz
High/Low2/Low1: 25 W/10 W/2.5 W [25W], 50 W/25 W/5 W [50W]
Variable reactance frequency modulation
±2.5 kHz [Narrow], ±4.0 kHz [Middle], ±5.0 kHz [Wide]
70 dBc typical 0.25 µW = 1GHz, 1.0 µW > 1 GHz
60 dB [Narrow], 70 dB [Middle]/[Wide]
+2 dB to –5 dB of 6 dB/octarve
range from 300 Hz to 2550 Hz [Narrow]/3000 Hz [Middle]/[Wide]
3% typical at 1 kHz, 40% deviation
40 dB [Narrow], 46 dB [Wide] ——
—— 50 dB [Narrow], 53 dB [Middle],
55 dB [Wide]
70–100% of max. deviation
8-pin modular (600 ?)
Double-conversion superheterodyne system
1st: 46.35 MHz, 2nd: 450 kHz
0.25 µV at 12 dB SINAD –4 dBµV (emf) at 20 dB SINAD
0.25 µV –4 dBµV (emf)
65 dB [Narrow], 75 dB [Middle]/[Wide]
74 dB 67 dB
40 dB [Narrow], 45 dB [Wide] ——
—— 50 dB [Narrow], 53 dB [Middle], 55 dB [Wide]
4 W typical at 10% distortion with a 4 ? load
2-conductor 3.5 (d) mm ( 1/8")/4 ?
SECTION 9 BOARD LAYOUTS
9-1 FRONT UNIT • TOP VIEW
microphone
J1 AFO
1-1-32, Kamiminami, Hirano-ku, Osaka 547-0003, Japan S-13817HZ-C1V-q
C 2002 Icom Inc.


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