Icom IC-E90 Manuale utente

MULTIBAND FM TRANSCEIVER

ie90

INTRODUCTION

This service manual describes the latest service information for

the IC-E90 MULTIBAND FM TRANSCEIVER at the time of

publication.

E90

MODEL VERSION SYMBOL

Europe

Europe-1

United Kingdom

Italy

Spain

France

EUR

EUR-1

ITR

ESP

FRA

To upgrade quality, all electrical or mechanical parts and inter-

nal circuits are subject to change without notice or obligation.

DANGER

NEVER connect the transceiver to an AC outlet or to a DC

power supply that uses more than 12 V. Such a connection

could cause a fire hazard and/or electric.

DO NOT expose the transceiver to rain, snow or any liquids.

DO NOT reverse the polarities of the power supply when

connecting the tranceiver.

DO NOT apply an RF signal of more than 20 dBm (100 mW)

to the antenna connector. This could damage the transceiver 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

1130006220 S.IC TC4W53FU IC-E90 LOGIC UNIT 1 piece

8930054290 2372 Main seal IC-E90 Chassis 5 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 insulated tuning 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 or 50 dB attenuator between the transceiver and a deviation meter or spectrum analyser when

using such test equipment.

8. READ the instructions of test equipment thoroughly before connecting equipment to the transceiver.

TABLE OF CONTENTS

SECTION 1 SPECIFICATIONS

SECTION 2 INSIDE VIEWS

SECTION 3 DISASSEMBLY INSTRUCTIONS

SECTION 4 CIRCUIT DESCRIPTION

4 - 1 RECEIVER CIRCUITS ................................................................................................... 4 - 1

4 - 2 TRANSMITTER CIRCUITS ............................................................................................ 4 - 4

4 - 3 PLL CIRCUITS................................................................................................................. 4 - 5

4 - 4 POWER SUPPLY CIRCUITS.......................................................................................... 4 - 7

4 - 5 PORT ALLOCATIONS..................................................................................................... 4 - 7

SECTION 5 ADJUSTMENT PROCEDURES

5 - 1 PREPARATION................................................................................................................ 5 - 1

5 - 2 TRIMMER ADJUSTMENT............................................................................................... 5 - 3

5 - 3 ADJUSTMENT MODE ADJUSTMENTS ......................................................................... 5 - 5

SECTION 6 PARTS LIST

SECTION 7 MECHANICAL PARTS AND DISASSEMBLY

SECTION 8 SEMI-CONDUCTOR INFORMATION

SECTION 9 BOARD LAYOUTS

9 - 1 LOGIC UNIT .................................................................................................................... 9 - 1

9 - 2 RF UNIT........................................................................................................................... 9 - 3

9 - 3 AF UNIT / VCO UNIT ...................................................................................................... 9 - 5

SECTION 10 BLOCK DIAGRAM

SECTION 11 VOLTAGE DIAGRAM

1 - 1

MGENERAL

• Frequency range : (Unit: MHz)

• Mode : FM, AM (RX only) and WFM (Rx only)

• Number of memory channels : 555 (incl. 50 scan edges and 5 call channels)

• Frequency stability : ±6 ppm max. (–10˚C to +60˚C; 14˚F to 140˚F)

• Tuning steps : 5, 6.25, 8.33, 9, 10, 12.5, 15, 20, 25, 30, 50 100, and 200 kHz

• Usable tempareture range : –10˚C to +60˚C; 14˚F to 140˚F

• Power supply requirement : 5.5 – 11 V DC or specified battery pack

• Usable battery pack/case : BP-217 (7.4 V) and BP-216 (3.2 V)

• Polarity : Negative ground

• Current drain (at 8.0 V DC) : (typical value)

*1Power save duty is 1:4.

• Anntena connector : SMA (50 Ω)

• Dimensions

(projections not included)

: 58(W) ×87(H) ×29(D) mm;

217⁄32(W) × 37⁄16(H) × 15⁄32(D) in

• Weight (with BP-217/Ant.) : 280 g; 9

7⁄8

MTRANSMITTER

• Output power (at 8.0 V DC) : High 5.0 W typical

Low 0.5 W typical

• Modulation system :

Variable reactance modulation

• Max. freq. deviation : ±5 kHz

• Spurious Emissions : Less than –60 dB

• External MIC connector : 3-conductor 2.5(d) mm (1⁄8”); 2 kΩ

SECTION 1 SPECIFICATIONS

440 MHz

2.0 A

1.2 A

High power

Low power

Rated output

Standby

Power saved*1

50/145 MHz

2.0 A

0.8 A 220 mA

100 mA

65 mA

Version

EUR

ITR

ESP

EUR-1

FRA

50 MHz

50 – 52

50 – 51

–

50.2 – 51.2

145 MHz

144 – 148

440 MHz

430 – 440

430 – 434

435 – 438

430 – 440

Receiving

0.495–999.990

50.000–52.000, 144.000–146.000, 430.000–440.000

0.495–29.995, 50.000–52.000, 76.000–135.995,

144.000–146.000, 430.000–440.000

2 - 1

SECTION 2 INSIDE VIEWS

EEPROM

(IC2: HN58X24128FPI,

Q2: UN9115)

RESET IC

(IC142: S-80928CNMC) Crystal oscillator for CPU clock

(X1: CR-687, 6.7584 MHz, Q40:UN9215)

CPU

(IC1: M30220MA-114RP)

AF regulator

(Q201: 2SB1201,

Q202: XP1501)

+3 regulator

(Q8: 2SB1132,

Q9: XP1501)

+3C regulator

(Q142: XP1501,

Q145: 2SB1132,

D143: MA2S111)

CPU3 regulator

(IC141: NJM2370U32)

440 MHz band modulation switch

(Q304: 2SJ364)

Microphone mute

(Q310: XP6501)

Microphone amplifier

(Q311: XP5601,

Q312: XP6501) 145 MHz band modulation switch

(Q305: 2SJ364)

50 MHz band modulation switch

(Q342: 2SJ364)

• LOGIC UNIT

Top view • LOGIC UNIT

Bottom view

S-13903MZ-C2

2002 Icom Inc.

1-1-32, Kamiminami, Hirano-ku, Osaka 547-0003, Japan

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