Icom IC-910H service manual Specifications, General

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SECTION 1 SPECIFICATIONS

GENERAL

• Frequency coverage

:

 

 

 

(Unit: MHz)

 

 

Version

144 MHz

430 (440) MHz

1200 MHz*1

 

 

 

 

 

 

 

 

U.S.A.

Tx: 144.0–148.0

Tx: 430.0–450.0

Tx: 1240.0–1300.0

 

 

Rx: 136.0–174.0*2

Rx: 420.0–480.0*3

Rx: 1240.0–1320.0*4

 

 

 

 

 

Europe

144.0–146.0

430.0–440.0

1240.0–1300.0

 

 

 

 

 

 

 

 

Australia

144.0–148.0

430.0–450.0

1240.0–1300.0

 

 

 

 

 

 

 

 

Korea

144.0–146.0

430.0–440.0

1260.0–1300.0

 

 

 

 

 

 

Mode

No. of memory Ch.

Antenna connector

Usable temp. range

Frequency stability

Frequency resolution

Power supply

Current drain (at 13.8 V DC)

Dimensions

(projections not included)

Weight (approx.)

ACC 1 connector

CI-V connector

DATA connectors

TRANSMITTER

Output power

Modulation system

Spurious emission

Carrier suppression

Unwanted sideband suppression

Microphone connector

KEY connector

*1 Optional UX-910 is installed.

*2 Guaranteed range is 144.0–148.0 MHz. *3 Guaranteed range is 430.0–450.0 MHz. *4 Guaranteed range is 1240.0–1300.0 MHz.

:USB, LSB, CW, FM, FM-N*

*Not available in 1200 MHz band

:212 (99 regular, 6 scan edges, 1 calls for each band) plus 10 satellite memories)

:SO-239 (50 ; VHF) Type-N (50 ; UHF)

:–10˚C to +60˚C; +14˚F to +140˚F

:Less than ±3 ppm (–10 to 60˚C; +14 to +140˚F)

:1 Hz minimum

:13.8 V DC ±15% (negative ground)

:

Transmit

Max. power

23.0 A

Receive

Standby

2.0 A (3.0 A with UX-910)

 

Max. audio

2.5 A (3.5 A with UX-910)

:241(W) 94(H) 239(D) mm

912(W) 31116(H) 91332(D) in

:4.5 kg; 10 lb (with UX-910: 5.35 kg; 11 lb 13 oz)

:8-pin DIN connector

:2-conductor 3.5 (d) mm (18)

:6-pin mini DIN 2 (for MAIN and SUB)

: (continuously adjustable)

144 MHz

5–100 W

430 (440) MHz

5–75 W

1200 MHz

1–10 W (with UX-910)

: SSB

Balanced modulation

FM

Variable reactance modulation

: 144/430 (440) MHz More than 60 dB

1200 MHz

More than 50 dB

:More than 40 dB

:More than 40 dB

:8-pin connector (600 )

:3-conductor 3.5(d) mm (14)

All stated specifications are subject to change without notice or obligation.

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Contents Service Manual Introduction Ordering PartsRepair Notes EURTable of Contents Specifications GeneralReceiver Section Inside ViewsMain and PLL Units FM if ICPA Unit Bottom View TOP ViewPLL IC Opening the transceiver’s case Disassembly and Option InstructionsUX-910 1200MHz Band Unit FL-132/FL-133 CW Narrow Filter Opening the PA unit coverMain SUB Installing 1st DSP unit front panel side Installing 2nd DSP unit rear panel sideUT-102 Voice Synthesizer Unit UT-106 DSP UnitCR-293 High Stability Crystal Unit Circuit Description Receiver Circuit6 10 MHz if Circuit Main Unit Demodulator Circuit Main UnitSquelch Control Circuit Main Unit Squelch Circuit Main UnitTransmitter Circuits Noise Blanker Circuit Main UnitAGC Circuit Main Unit Meter Circuit Main UnitTransmit if Amplifier Circuit Main Unit Modulation Circuit Main UnitCW Keying Circuit Main Unit RF Circuit PA UnitPLL Circuits 7 1LO PLL Circuit PLL Circuits8 2LO PLL Circuit Adjustment Procedures Preparation Before SarvicingRequired Test Equipment ‘ ConnectionsPLL Adjustments Frequency AdjustmentPLL and Main Units Receiver Adjustments R547 P501L353 L354 R360EXT NoiseBlanker Main Band OFFL283 L22CP851 CP852Transmitter Adjustments R503 C659R138 R131If Total Main GainGND LO LeakR504 R202CP1613 R1613Software Adjustment Software Adjustment MeterNoise SQL Filter CalibrationTX Power HPF OFF DeviationLPF UX-910 Adjustments CP321 CP322C332 R13Power SET APCPre-setting for APC adjustment Front Unit Section Parts ListDisplay Board Resistor ERA3YED VR-A Board Func BoardVR-B Board RIT Board Jack BoardMIC Board PLL UnitResistor ERA3YEB Thermistor Tantalum ECST1AD107R Main Unit REG BA09TDiode DAN222TL Resistor ERA3YKD R364 7030003320 R915 7030003520 Tantalum Temsva 1C 335M-8L Electrolytic ECEV1EA4R7SR Electrolytic Relay Diode HSU88TRF Coil Eljre 15NG-F Resistor ERJ1WYJ181U Resistor ERJ1TYJ102U JB 1H JB 1C Mica DRV Board BARISTOR-A BoardVARISTOR-B Board BARISTOR-C Board2UX-910MAIN Unit Main Unit UX-910Resistor RGB3L R15 Resister ERA3YED Tantalum ECST1CC226R CH 1H Connectot 25FMN-BTK Mechanical Parts Display UnitCover Parts Chassis PartsUnpacking UX-910 Chassis PartsUX-910 Main Unit UX-910 UnpackingSEMI-CONDUCTOR Information Transistors and FET’SDTA114 EE TL Diodes MA29BSection Board Layouts Page Icom America Inc 13714HZ-C1

IC-910H specifications

The Icom IC-910H is a highly regarded and versatile transceiver that is designed for amateur radio operators who are particularly interested in V/UHF and microwave communications. Known for its exceptional performance, the IC-910H encompasses a suite of features that make it a standout choice for both casual and dedicated hams.

One of the main features of the IC-910H is its dual-band capability, allowing for simultaneous operation on both 144 MHz (2 meters) and 430 MHz (70 centimeters) bands. This dual operation enables users to engage in various communication modes, including SSB, CW, FM, and digital. Its high frequency stability ensures that users can rely on the transceiver for accurate and consistent transmissions.

The IC-910H is equipped with a high-performance 10 MHz IF filter that improves selectivity and reduces adjacent channel interference. The optional 1.2 GHz module enhances the transceiver’s capabilities, allowing operators to venture into microwave frequencies. This expandability is a significant advantage for users who wish to progress in their amateur radio pursuits.

Another notable aspect of the IC-910H is its large, easy-to-read LCD display, which features various color options for enhanced visibility. The front panel layout is user-friendly, providing quick access to important controls and functions. The built-in DSP (Digital Signal Processing) technology offers noise reduction and filtering capabilities, significantly improving overall audio quality and making weak signals more intelligible.

The transceiver also includes extensive memory functions, with up to 1,000 memory channels available for storing frequencies, modes, and operational settings. Additionally, it supports CTCSS and DCS tones, which facilitate the use of repeater systems and private group communications.

In terms of build quality, the IC-910H features a robust construction designed for durability and long-term use. Its efficient power supply management ensures excellent performance while minimizing heat generation, making it suitable for extended operating sessions.

Overall, the Icom IC-910H is a powerful and feature-rich transceiver that is favored by many amateur radio enthusiasts. With its versatile operating modes, advanced filtering capabilities, and clear display, it stands out as a reliable tool for both casual operators and serious DXers. Its well-thought-out design and comprehensive features make it a valuable addition to any ham's station collection.