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Make/Model Information:

  • Brand:   Icom
  • Models included:
    • Icom IC-M72

File Information:

  • Type:   Factory Service Manual (FSM)
  • Language:   English (EN)
  • Number of pages:   33
  • File size:  ∼ 4.10 MB
  • File Format:   PDF only
  • SME Watermarks:   None
  • Password lock:   No
  • Edit/copy/modify:   Yes
  • SKU:   ROIC-0122

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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VHF MARINE TRANSCEIVER
iC-m72
S-14221MZ-C1
Jan. 2006
This service manual describes the latest service information
for the IC-M72 VHF MARINE TRANSCEIVER at the time of
pub lication.
Be to the four when
replacement parts:
1. 10-digit order numbers
2. Component part number and name
3. Equipment model name and unit name
4. Quantity required

1110001811 S
.IC TA7368FG Main unit
8930068440 IC-M72 10 pieces
Addresses provided the back for
convenience.
NEVER connect the transceiver to an AC outlet or to a DC
er that more 10 V. will the
transceiver.
DO the of power when
connecting the transceiver.
DO NOT apply an RF signal of more than 20 dBm (100 mW)
to antenna could the
ceiver's
front end.
1.
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 insulated turning tool MUST be used for all adjustments.
5. DO
NOT keep power ON for a long time when the transceiver is defective.
6. DO NOT transmit power into a signal generator or a sweep generator.
7. ALWAYS connect a 40 dB to 50 dB attenuator between the transceiver and a deviation meter or spectrum analyzer when
using such test equipment.
8. READ the instructions of test equipment thoroughly before connecting equipment to the transceiver.
upgrade quality, any electrical or mechanical parts
and circuits subject change
notice or obligation.
Icom, Inc. are trademarks Icom (Japan) the States, United
Kingdom, Germany, France, Spain, Russia and/or other countries.
INTRODUCTION
DANGER
ORDERING PARTS
REPAIR NOTES
VersionScramble TX Power
.A USA BC-147A
6 W USA-1 Y es
South-
east Asia
None BC-147E SEA-1 es
ustralia AUS BM-95V W A US-1
TABLE OF CONTENTS
SECTION SPECIFICATIONS
SECTION INSIDE VIEWS
SECTION DISASSEMBLY INSTRUCTIONS
SECTION CIRCUIT DESCRIPTION
4 - 1
4 - 2
4 - 3
4 - 4
4 - 5
4 - 6
SECTION ADJUSTMENT PROCEDURES
5 - 1
5 - 2
SECTION PARTS LIST
SECTION MECHANICAL PARTS AND DISASSEMBLY
SECTION SEMICONDUCTOR INFORMATION
SECTION BOARD LAYOUTS
SECTION BLOCK DIAGRAM
SECTION VOLTAGE DIAGRAM
SECTION BC-166 INFORMATION
SECTION 1 SPECIFICATIONS
GENERAL
• Frequency coverage TX 156.025–157.425 MHz
RX 156.050–163.275 MHz
• Type of emission 16K0G3E
• Antenna impedance 50 ? (nominal)
• Operating temperature range -20°C to +60°C; -4°F to +140°F
• Power supply requirement Speci? ed Icom's battery pack only (operating volage 7.5 V DC; negative ground)
• Current drain (approx.) RX (Max. audio) 0.4 A (internal speaker)
0.2 A (external speaker)
at 6 W 1.7 A
at 5 W 1.5 A
at 3 W 1.3 A
at 1 W 0.7 A
• Dimensions (projections not included) 52.5(W) Χ 125(H) Χ 30(D) mm; 2 1/16(W) Χ 4 29/32(H) Χ 1 3/16(D) in.
• Weight (approx.) 280 g; 9.9 oz. (Including BP-245)
TRANSMITTER
• Output power High 6 W (Except [AUS], [AUS-1])
5 W ([AUS], [AUS-1])
Middle 3 W
Low 1 W
• Modulation Variable reactance frequency modulation
• Max. frequency deviation ±5 kHz
• Frequency error ±10 ppm
• Spurious emissions –68 dBc typ.
• Adjacent channel power 70 dB
• Audio harmonic distortion 10% (at 60% deviation)
• Residual modulation 40 dB
• Audio frequency response +1 dB to –3 dB of 6 dB oct. from 300 Hz to 3000 Hz
• Microphone impedance 2 k?
RECEIVER
• Receive system Double-conversion super heterodyne
• Intermediate frequency 1st; 21.7 MHz, 2nd; 450 kHz
• Sensitivity –13 dB΅ typ. (at 12 dB SINAD)
• Squelch sensitivity –9 dB΅ typ. (at threshold)
• Adjacent channel selectivity 70 dB typ.
• Spurious response 70 dB typ.
• Intermodulation rejection ratio 70 dB typ.
• Hum and Noise 40 dB
• Audio frequency response +1 dB to –3 dB of –6 dB oct. from 300 Hz to 3000 Hz
• Audio output power Internal speaker 0.6 W typ. (at 10% distortion with an 8 ? load)
External speaker 0.35 W typ. (at 10% distortion with an 8 ? load)
• Output impedance (audio) 8 ?
Specifications are measured in accordance with TIAIA–603.
All stated specifications are subject to change without notice or obligation.
1-1-32, Kamiminami, Hirano-ku, Osaka 547-0003, Japan S-14221MZ-C1
© 2006 Icom Inc.


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