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Make/Model Information:

  • Brand:   Icom
  • Models included:
    • Icom IC-E90

File Information:

  • Type:   Factory Service Manual (FSM)
  • Language:   English (EN)
  • Number of pages:   57
  • File size:  ∼ 2.90 MB
  • File Format:   PDF only
  • SME Watermarks:   None
  • Password lock:   No
  • Edit/copy/modify:   Yes
  • SKU:   ROIC-0061

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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.
MODEL VERSION SYMBOL
Europe-1
United Kingdom
France
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 - 2 TRANSMITTER CIRCUITS
4 - 3 PLL CIRCUITS
4 - 4 POWER SUPPLY CIRCUITS
4 - 5 PORT ALLOCATIONS
SECTION 5 ADJUSTMENT PROCEDURES
5 - 1 PREPARATION
5 - 2 TRIMMER ADJUSTMENT
5 - 3 ADJUSTMENT MODE ADJUSTMENTS
SECTION 6 PARTS LIST
SECTION 7 MECHANICAL PARTS AND DISASSEMBLY
SECTION 8 SEMI-CONDUCTOR INFORMATION
SECTION 9 BOARD LAYOUTS
9 - 1 LOGIC UNIT
9 - 2 RF UNIT
9 - 3 AF UNIT / VCO UNIT
SECTION 10 BLOCK DIAGRAM
SECTION 11 VOLTAGE DIAGRAM
M GENERAL
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. (10C to +60C; 14F to 140F)
Tuning steps : 5, 6.25, 8.33, 9, 10, 12.5, 15, 20, 25, 30, 50 100, and 200 kHz
Usable tempareture range : 10C to +60C; 14F to 140F
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 )
Dimensions (projections not included) : 58(W)
Weight (with BP-217/Ant.) : 280 g; 9 7/8 oz
M TRANSMITTER
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 k
SECTION 1 SPECIFICATIONS
440 MHz
High power
Low power
Rated output
Standby
Power saved*
50/145 MHz
Version
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
0.495999.990
50.00052.000, 144.000146.000, 430.000440.000
0.49529.995, 50.00052.000, 76.000135.995,
144.000146.000, 430.000440.000
SECTION 2 INSIDE VIEWS
(IC2: HN58X24128FPI,
Q2: UN9115)
RESET IC
(IC142: S-80928CNMC)
Crystal oscillator for CPU clock
(X1: CR-687, 6.7584 MHz, Q40: UN9215)
(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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