Equipment information

Icom IC-R75 Receiver
Manufacturer
Icom
Model IC-R75
Date 1999
Category: Radio, Communication
Group Receiver
Description COMMUNICATIONS RECEIVER
Information
                                    GENERAL
• Frequency range :
*1 Specifications guaranteed for 0.1 – 29.99 MHz and 50 – 54 MHz
*2 Specifications guaranteed for 0.1 – 29.99 MHz
• Mode : SSB (LSB, USB), AM, FM, CW, RTTY, S-AM
• Receive system : Triple-conversion superheterodyne
• Intermediate frequencies :
May differ according to selected IF filter.
• Sensitivity : 0.1 MHz – 1.799 MHz (Preamplifiers are OFF)
SSB, CW, RTTY less than 2.0 μV for 10 dB S/N
AM, S-AM less than 13.0 μV for 10 dB S/N
1.8 MHz – 27.99 MHz (The preamplifier 1 is ON)
SSB, CW, RTTY less than 0.16 μV for 10 dB S/N (typical)
AM, S-AM less than 2.0 μV for 10 dB S/N
28 MHz – 29.99 MHz (The preamplifier 1 is ON)
SSB, CW, RTTY less than 0.16 μV for 10 dB S/N (typical)
AM, S-AM less than 2.0 μV for 10 dB S/N
FM less than 0.5 μV for 12 dB SINAD
50 MHz – 54 MHz (The preamplifier 2 is ON)
SSB, CW, RTTY less than 0.13 μV for 10 dB S/N (typical)
AM, S-AM less than 1.0 μV for 10 dB S/N
FM less than 0.25 μV for 12 dB SINAD
• selectivity : SSB, CW, RTTY More than 2.1 kHz/–6 dB
Less than 4.0 kHz/–60 dB
AM, S-AM More than 6.0 kHz/–6 dB
less than 20.0 kHz/–50 dB
FM More than 12.0 kHz/–6 dB
less than 30.0 kHz/–40 dB
• Audio output power : More than 2.0 W at 10 % distortion with an 8 ½ load
• Antenna impedance : 50 ½ or 450 ½
• Squelch sensitivity (threshold) :
*Preamplifiers are OFF; *1Preamplifier 1 is ON; *2Preamplifier 2 is ON
• Current drain (13.8 V DC) : Less than 1.3 A (Standby), Less than 1.5 A (Max. audio out)
• Spurious and image rejection : More than 70 dB (0.1 – 1.799 MHz SSB, AM, S-AM are more than 60 dB)
• Dimensions : 241(W)´94(H)´229(D) mm; 91⁄2(W)´311⁄16(H)´91⁄32(D) inch (projection not included)
• Weight (approximate) : 3.0 kg; 6 lb 10 oz (AC adaptor “AD–55/A/V” is not included)
• Antenna connector : SO-239 (50 ½), push connection terminal (450 ½)
• CI-V connector : 2-connector 3.5 (d) mm (1⁄8")/8 ½
• PHONES connector : 3-conductor 6.35 (d) mm (1⁄8")
• External speaker connector : 2-conductor 3.5 (d) mm (1⁄8")/8 ½

These manuals are available for the above equipment:

Icom -- IC-R75 -- Service Manual
File name Icom-3444-Manual-Page-1-Picture
Manual Type Service Manual
Pages 51
Size 2.62 Mbytes (2749913 Bytes)
Language english
Revision
Manual-ID/Number A-5580I-S
Date 1999
Quality Electronic document, no scan, very well readable.
Upload date
MD5 a1ee29fd8b40211da55143a8731b92a5
Downloads 473 since 08 April 2012
Information
This service manual describes the latest service information
for the IC-R75 at the time of publication.
TABLE OF CONTENTS
SECTION 1 SPECIFICATIONS
SECTION 2 INSIDE VIEWS
SECTION 3 CIRCUIT DESCRIPTION
3-1 RECEIVER CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
3-2 PLL CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
3-3 LOGIC CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5
3-4 POWER SUPPLY CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-6
3-5 PORT ALLOCATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-7
SECTION 4 ADJUSTMENT PROCEDURES
4-1 PREPARATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
4-2 PLL ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
4-3 RECEIVER ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4
4-4 SET MODE ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-7
SECTION 5 PARTS LIST
SECTION 6 MECHANICAL PARTS AND DISASSEMBLY
SECTION 7 SEMI-CONDUCTOR INFORMATION
SECTION 8 BOARD LAYOUTS
8-1 PHONE AND VR BOARDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-1
8-2 DISPLAY BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-3
8-3 LOGIC BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-5
8-4 PLL UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-6
8-5 MAIN UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-7
SECTION 9 BLOCK DIAGRAM
SECTION 10 VOLTAGE DIAGRAM
10-1 FRONT UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-1
10-2 PLL UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-2
10-3 MAIN UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-3
Icom-3444-Manual-Page-1-Picture
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