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INTRODUCTION

This service manual describes the latest service information
for the IC-2725E DUAL BAND FM TRANSCEIVER 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

<SAMPLE ORDER>

1110004310 S.IC

M62352GP

IC-2725E 

MAIN UNIT

5 pieces

8810009610 Screw FH M2.6

×

6 ZK IC-2725E 

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.

To upgrade quality, any electrical or mechanical parts and
internal circuits are subject to change without notice or
obligation.

MODEL

IC-2725E   

VERSION

Europe   

Italy   

SYMBOL

EUR   

ITR   

Summary of Contents for IC-2725E

Page 1: ...DUAL BAND FM TRANSCEIVER i2725E SERVICE MANUAL ...

Page 2: ...H M2 6 6 ZK IC 2725E 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 electr...

Page 3: ...CIRCUITS 4 5 4 3 PLL CIRCUITS 4 6 4 4 POWER SUPPLY CIRCUITS 4 8 4 5 PORT ALLOCATIONS 4 10 SECTION 5 PARTS LIST SECTION 6 MECHANICAL PARTS AND DISASSEMBLY SECTION 7 SEMI CONDUCTOR INFORMATION SECTION 8 BOARD LAYOUTS 8 1 CONTROL UNIT 8 1 8 2 MAIN UNIT 8 3 8 3 VCO UNIT 8 5 SECTION 9 BLOCK DIAGRAM SECTION 10 VOLTAGE DIAGRAMS 10 1 CONTROL UNIT 10 1 10 2 MAIN AND VCO UNITS 10 2 ...

Page 4: ...16 H 73 8 D inch Weight Controller 150 g 5 29 oz Main unit 1 4 kg 3 0 lb M TRANSMITTER Output power VHF 50 W 25 W 5 W selectable UHF 35 W 25 W 5 W selectable Modulation system Variable reactance frequency Maximum frequency deviation 5 0 kHz Spurious emissions Less than 60 dB Microphone connector 8 pin modular jack 600 Ω M RECEIVER Receive system Double conversion superheterodyne Intermediate frequ...

Page 5: ...ws A and remove the cover Disconnect two cables B from J1 and J2007 Remove the clip c A A B C J2007 J1 G F G F H E MAIN UNIT J I Unsolder 3 points E Unscrew 4 screws F Unsolder 4 points G and remove the cover H Unscrew 2 screws I Unscrew 12 screws J and remove MAIN unit 3 1 ...

Page 6: ...BAND V MHz SCAN M CALL MW MAIN BAND V MHz SCAN M CALL MW DUP MONI TONE DTMF LOW PRIO SQL DIAL DIAL SQL VOL SET VOL PWR HV 6 4 2 to MAIN unit J2006 5 3 1 J2 RDATA MIC TDATA GND MICE 2 4 6 8 to Microphone 1 3 5 7 J1 MICU D PTT MIC MICIN 8V EXTMIC MICE GND 8 1 ...

Page 7: ...1 1 3 S 13907HZ C2 2002 Icom Inc ...

Page 8: ...Icom IC 2725E Service Manual Icom IC 2725E Service Manual Icom IC 2725E Service Manual Icom IC 2725E Service Manual Icom IC 2725E Service Manual Icom IC 2725E Service Manual Icom IC 2725E Service Manual Icom IC 2725E Service Manual ...

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