Manual At=140

SERVICE MANUAL
HF AUTOMATIC ANTENNA TUNER

AT-130 AT-130E AT-140

INTRODUCTION
This service manual describes the latest service information for the AT-130/AT-130E/AT-140 HF AUTOMATIC ANTENNA TUNER at the time of publication. MODEL AT-130 SYMBOL USA USA-1 USA-2 AT-130E AT-140 EUR EUR-1 USA-3 VERSION U.S.A. U.S.A.-1 U.S.A.-2 Europe Europe-1 U.S.A.-3

DANGER
NEVER connect the antenna tunerto an AC outlet or to a DC power supply that uses more than 16 V. This will ruin the antenna tuner. DO NOT expose the antenna tuner to rain, snow or any liquids. DO NOT reverse the polarities of the power supply when connecting the antenna tuner.

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

ORDERING PARTSBe sure to include the following four points when ordering replacement parts: 1. 2. 3. 4. 10-digit order numbers Component part number and name Equipment model name and unit name Quantity required

REPAIR NOTES
1. Make sure a problem is internal before disassembling the antenna tuner. 2. DO NOT open the antenna tuner until the antenna tuner is disconnected from its power source. 3. DO NOT forceany 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 antenna tuner is defective. 6. READ the instructions of test equipment thoroughly before connecting equipment to the antenna tuner.

1140003000 IC µPD78212CW AT-130 TUNER UNIT 5pieces Top case 10 pieces 8810000660 Screw PH M4×12 SUS AT-130

Addresses are provided on the inside back cover for your convenience.

Icom, Icom Inc. and are registered trademarks of Icom Incorporated (Japan) in the United States, the United Kingdom, Germany, France, Spain, Russia and/or other countries.

TABLE OF CONTENTS
SECTION 1 SPECIFICATIONS

SECTION 2

INSIDE VIEW

SECTION 3CIRCUIT DESCRIPTION

SECTION 4

ADJUSTMENT PROCEDURES

SECTION 5

PARTS LIST

SECTION 6

MECHANICAL PARTS

SECTION 7

SEMI-CONDUCTOR INFORMATION

SECTION 8
8-1 8-2

BOARD LAYOUTS
TUNER UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 1 MANUAL UNIT (AT-130E ONLY) . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 2

SECTION 9

BLOCK DIAGRAM

SECTION 10

VOLTAGE DIAGRAM

SECTION 1
‘ GENERAL

SPECIFICATIONS

• Number of memory channels • Frequency range • Maximum input power

: 45 : 1.6 MHz to 30 MHz with a 7 m (23 ft) or longer antenna element : 150 W PEP 100 W continuous : 50 Ω : 5 to 15 W : Approx.2 to 3 sec. (max. 15 sec.) Approx. 1 sec. : Less than 2.0 : 1 (after tuning; except for multiples of 1⁄2 λ) : Marconi-type with suitable RF ground (More than 7 m (23 ft) is suggested) : DC 13.6 V ± 15 % (supplied from HF transceiver) : Less than 2 A : –30˚C to +60˚C; –22˚F to +140˚F : 230(W) × 80(H) × 340(D) mm 93⁄32(W) × 33⁄32(H) × 1313⁄32(D) in : Weatherproof : Approx. 2.5 kg; 5 lb 8 oz Approx.2.7 kg; 6 lb : OPC-420 OPC-566 OPC-1147 OPC-1186 (For (For (For (For [IC-77/78]) [IC-M700PRO], [IC-M710/RT]) [IC-M802]) [IC-F7000])

• Input impedance • Minimum operating input power • Automatic tuning time (General) (Returning to a memorized frequency) • Tuning accuracy (VSWR)

• Antenna required

• Power supply required • Current drain • Usable temperature range • Dimensions (projectionsnot included)

• Case construction • Weight (AT-130/AT-140) (AT-130E) • Control cable

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

1-1

SECTION 2

INSIDE VIEW

Antenna terminal

LED's (DS1-DS23: EL204HD) Dip switch (SW5: SSGM18049A) Dip switch (SW4: SSGM17012A) Control cable receptacle Dip switch (SW3: SSGM18049A)

Mode switch (SW1: MS621C)...