Icom_AT-130_AT-130E_AT-140_serv.pdf

HF AUTOMATIC ANTENNA TUNER AT-130 AT-130E AT-140 SERVICE MANUAL MODEL AT-130 AT-130E AT-140 SYMBOL USA USA-1 USA-2 EUR EUR-1 USA-3 VERSION U.S.A. U.S.A.-1 U.S.A.-2 Europe Europe-1 U.S.A.-3 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. DANGER NEVER connect the antenna tuner to 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 liq- uids. DO NOT reverse the polarities of the power supply when connecting the antenna tuner. 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 1140003000 ICPD78212CWAT-130 TUNER UNIT 5 pieces 8810000660 Screw PH M412 SUSAT-130 Top case10 pieces Addresses are provided on the inside back cover for your convenience. 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 force any of the variable components. Turn them slowly and smoothly. 4. DO NOT short any circuits or electronic parts. An insu- lated tuning tool MUST be used for all adjustments. 5. DO NOT keep power ON for a long time when the anten- na tuner is defective. 6. READ the instructions of test equipment thoroughly before connecting equipment to the antenna tuner. To upgrade quality, any electrical or mechanical parts and internal circuits are subject to change without notice or obligation. 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 1SPECIFICATIONS SECTION 2INSIDE VIEW SECTION 3CIRCUIT DESCRIPTION SECTION 4ADJUSTMENT PROCEDURES SECTION 5PARTS LIST SECTION 6MECHANICAL PARTS SECTION 7SEMI-CONDUCTOR INFORMATION SECTION 8BOARD LAYOUTS 8 - 1TUNER UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 1 8 - 2MANUAL UNIT (AT-130E ONLY) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 2 SECTION 9BLOCK DIAGRAM SECTION 10VOLTAGE DIAGRAM 1 - 1 SECTION 1SPECIFICATIONS GENERAL Number of memory channels: 45 Frequency range: 1.6 MHz to 30 MHz with a 7 m (23 ft) or longer antenna element Maximum input power: 150 W PEP 100 W continuous Input impedance: 50 Minimum operating input power: 5 to 15 W Automatic tuning time: (General)Approx. 2 to 3 sec. (max. 15 sec.) (Returning to a memorized frequency)Approx. 1 sec. Tuning accuracy (VSWR): Less than 2.0 : 1 (after tuning; except for multiples of 12 ) Antenna required: Marconi-type with suitable RF ground (More than 7 m (23 ft) is suggested) Power supply required: DC 13.6 V 15 % (supplied from HF transceiver) Current drain: Less than 2 A Usable temperature range: 30C to +60C; 22F to +140F Dimensions (projections not included): 230(W) 80(H) 340(D) mm 9332(W) 3332(H) 131332(D) in Case construction: Weatherproof Weight: (AT-130/AT-140)Approx. 2.5 kg; 5 lb 8 oz (AT-130E)Approx. 2.7 kg; 6 lb Control cable: OPC-420(For IC-77/78) OPC-566(For IC-M700PRO, IC-M710/RT) OPC-1147(For IC-M802) OPC-1186(For IC-F7000) All stated specifications are subject to change without notice or obligation. 2 - 1 SECTION 2INSIDE VIEW +5V regulator (IC8: TA7805S) Comparator (IC10: TA75393S) Mounting plate Antenna cable receptacle Dip switch (SW3: SSGM18049A) Dip switch (SW4: SSGM17012A) Dip switch (SW5: SSGM18049A) LEDs (DS1-DS23: EL204HD) Antenna terminal Mode switch (SW1: MS621C) Control cable receptacle CPU (IC1: mPD78212CW-613) Ground terminal Water drain screw +5V regulator (IC8: TA7805S) Comparator (IC10: TA75393S) Mounting plate Antenna cable receptacle Dip switch (SW3: SSGM18049A) Dip switch (SW4: SSGM17012A) Dip switch (SW5: SSGM18049A) LEDs (DS1-DS23: EL204HD) Antenna terminal Mode switch (SW1: MS621C) Control cable receptacle CPU (IC1: mPD78212CW-613) Ground terminal Water drain screw +5V regulator (IC8: TA7805S) Comparator (IC10: TA75393S) Mounting plate Antenna cable receptacle Dip switch (SW3: SSGM18049A) Dip switch (SW4: SSGM17012A) Dip switch (SW5: SSGM18049A) LEDs (DS1-DS23: EL204HD) Antenna terminal Mode switch (SW1: MS621C) Control cable receptacle CPU (IC1: PD78212CW-613) Ground terminal Water drain screw Photo: AT-140 3 - 1 SECTION 3CIRCUIT DESCRIPTION 3-1 GENERAL An 8-bit microprocessor controls the AT-130/AT-130E/AT- 140. The tuner matches the antenna system to the trans- ceiver by using four kinds of detector circuits. These circuits are: (1) FORWARD POWER DETECTOR (2) SWR DETECTOR (3) PHASE DETECTOR (4) IMPEDANCE DETECTOR Detailed descriptions of each circuit as follows. GENERAL 3-2 FORWARD (FWD) POWER DETECTOR CIRCUIT This circuit ensures the input power from the transceiver is low enough to be handled by the attenuator within the tuner. In the TUNER UNIT, L1 and D1 detects the RF input current. C2 and C3 divide the detected voltage and feed it to IC10a. 3-3 SWR DETECTOR CIRCUIT The reflected power from the antenna system provides a detection voltage. The voltage doubler, consisting of D13 and D14, rectifies this voltage and passes through the voltage divider formed by R36 and R37. These SWR data from voltage divider feed into IC1, The CPU. The CPU controls the setting of the coils and capaci- tors in the matching network. FORWARD POWER DETECTOR CIRCUIT SWR DETECTOR CIRCUIT 3 - 2 3-4 PHASE DETECTOR CIRCUIT This circuit consists of L2, L3 and IC9. The phase detectors purpose is to detect reactance components and provide a pure resistance. The output of IC9 is a reference voltage of approximately 4 V when the load of L3 is a pure resistance with no reac- tance. An inductive load produces an output voltage from IC9 which is lower than the reference voltage, whereas, a capacitive load produces an output voltage higher than the reference voltage. IC10a amplifies the output voltage and passes it to comparator IC10a. 3-5 IMPEDANCE DETECTOR CIRCUIT The tuner uses an attenuator to reduce the transmit power to a very low level. The low power minimizes the risk of inter- ference to other stations while matching an antenna to the transmitter. The VSWR at the input terminal is usually close to 1:1 even with a large change of impedance at the attenuator output due to the 16 dB of isolation between the input and the matching network. The circuit uses the constant voltage at D7 and D8 on The TUNER unit as a reference. If the impedance of the attenu- ator output is higher than 50 , the detected voltage by D11 and D12 is HIGH. If the impedance is lower than 50 , the voltage is LOW. Both the reference and detected voltages feed to comparator IC10b. 3-6 LOGIC CIRCUIT IC1, The CPU, controls the antenna matching network. The CPU receives +5V through IC8 when DC power is applied to the tuner. This voltage initializes the CPU. The stored pro- gram in the Read Only Memory (ROM) IC12 sets each relay to the initial condition. The tuning program begins only if the START line is at LOW level. RL1 and RL2 activate when RF power at the input antenna connector from the transceiver is present at an appropriate level (See Section 6-2). The data from the previously described detectors (input RF power, reflected RF power, phase difference, impedance dif- ference) feed into the CPU. The coil data then passes to IC4, the capacitor data to IC3 and the control data to IC2 according to the tuning program. 3-8 ANTENNA CURRENT DETECTOR CIRCUIT (MANUAL UNIT Europe version only) On the MANUAL UNIT, L319 detects the antenna current. D305 rectifies the detected voltage and feed it to J301 through low-pass filter comprising R305, C305 and C306. PHASE DETECTOR CIRCUIT IMPEDANCE DETECTOR CIRCUIT ANTENNA CURRENT DETECTOR CIRCUIT 4 - 1 SECTION 4ADJUSTMENT PROCEDURES DC power supply Icom Transceiver Antenna connector Tuner receptacle (Refer to below) E ANTC 13.6 GND STAR KEY J9 OPC-566 J9 1 2 3 4 or AT-130/E AT-140 E ANTC 13.6 GND STAR KEY J9 OPC-420 1 1. *E or ANTC 2. 13.6 V 9. START 10. KEY 2 3 4 or 1 2 3 4 E ANTC 13.6 GND STAR KEY J9 OPC-11471 1. KEY 2. START 3. 13.6 V 4. *E or ANTC 1. KEY 2. START 3. 13.6 V 4. *E or ANTC *Depened on versions 2 3 4 or 1 2 3 4 5 6 E ANTC 13.6 GND STAR KEY J9 OPC-1186 1 1. *E or ANTC 2. 13.6 V 9. START 10. KEY 2 9 10 or 1 2 3 4 5 6 7 8 9 10 12 34 CONNECTION 4-1 PREPARATION I REQUIRED TEST EQUIPMENT EQUIPMENT DC power supply Oscilloscope Transceiver GRADE AND RANGE Output voltage: Depended on connecting transceiver (Ex; 13.8 V DC) Current capacity: Depended on connecting transceiver (Ex; 30 A or more) Frequency range: DC20 MHz Measuring range: 0.0110 V : Icom transceiver 4 - 2 4-2 ANTENNA TUNER ADJUSTMENTS PHASE DETECTOR CIRCUIT IMPEDANCE DETECTOR CIRCUIT FORWARD DETECTOR CIRCUIT SWR DETECTOR CIRCUIT ADJUSTMENT ADJUSTMENTADJUSTMENT CONDITION MEASUREMENT VALUE POINT UNITLOCATIONUNITADJUST 1 2 3 4 S1: PRESET S4-7: OFF Short pins of J13. Disconnect P6 from J6. Ground J15 with a jumper wire. TRANSCEIVER Display freq. : 1.6 MHz Output power : 10 W (carrer only) Transmitting Same as above Same as above Same as above Connect an oscillo- scope to the check point pin 2 of J8. Connect an oscillo- scope to check point pin 3 of J8. Connect an oscillo- scope to check point pin 1 of J8. Connect an oscillo- scope to check point pin 4 of J8. 5 V (Tune R194 just before droped.) 5 V (Tune C7 just before drope.) 1.4 2.4 V 0 0.1 V R56 C7 Verify Verify TUNERTUNER NOTE: After adjustment, remove the jumper wires from J15 and ground. After adjustment, Disconnect pins of J13. After adjustment, reconnect P6 to J6 and set S1 to NORMAL position. PRESET NORMAL OFF S1 S4 J8 1 7 C7 J13 J15 J6 R194 Impedance detector adjustment Phase detector adjustment 1 6 LEDs TUNER UNITTUNER UNIT IC11140003000ICPD78212CW-613T IC21130006930ICTC74HC574APT IC31130006930ICTC74HC574APT IC41130006930ICTC74HC574APT IC51130005200ICTC74HC393APT IC61130000050ICTC4013BPT IC71110005750ICS-80841CLY-BT IC81110002020ICTA7805ST IC101110000060ICTA75393ST IC111160000100ICPA2004CT IC121160000100ICPA2004CT IC131160000100ICPA2004CT IC141160000100ICPA2004CT Q11560000110FET2SK241-GRT Q21530000150TRANSISTOR2SC2668-OT Q31590000350TRANSISTORRN1204T Q41530000110TRANSISTOR2SC2458-GRT Q51530000110TRANSISTOR2SC2458-GRT Q71510000080TRANSISTOR2SA1048-GRT Q81530000110TRANSISTOR2SC2458-GRT Q91590000350TRANSISTORRN1204T Q101530000110TRANSISTOR2SC2458-GRT Q111530000110TRANSISTOR2SC2458-GRT D11710000021DIODE1N60 T D21710000580DIODE1SS265T D31710000580DIODE1SS265T D41710000160DIODE1SS133T D51710000021DIODE1N60 T D61710000021DIODE1N60 T D71710000021DIODE1N60 T D81710000021DIODE1N60 T D91710000160DIODE1SS133T D101710000160DIODE1SS133T D111710000021DIODE1N60 T D121710000021DIODE1N60 T D131710000021DIODE1N60 T D141710000021DIODE1N60 T D151710000160DIODE1SS133T D161710000060DIODE1SS55-T4T D171710000060DIODE1SS55-T4T D181710000350DIODE1N4002T D191710000350DIODE1N4002T D201710000350DIODE1N4002T D211710000160DIODE1SS133T D221710000160DIODE1SS133T D241710000040DIODE1S953T D251730000170ZENERRD8.2E B1T D261710000040DIODE1S953T D291710000160DIODE1SS133T D301710000160DIODE1SS133T D311710000160DIODE1SS133T D321710000160DIODE1SS133T D331710000160DIODE1SS133T D341710000160DIODE1SS133T D351710000160DIODE1SS133T D361710000160DIODE1SS133T D371710000160DIODE1SS133T D381710000160DIODE1SS133T D391710000160DIODE1SS133T D401710000160DIODE1SS133T D411710000160DIODE1SS133T D421710000160DIODE1SS133T D431710000160DIODE1SS133T D441710000160DIODE1SS133T D451710000160DIODE1SS133T D461710000160DIODE1SS133T D471710000160DIODE1SS133T D481710000160DIODE1SS133T D491710000160DIODE1SS133T D501710000160DIODE1SS133T D511710000160DIODE1SS133T D521710000060DIODE1SS55-T4T D531710000060DIODE1SS55-T4T D541710000060DIODE1SS55-T4T D551710000060DIODE1SS55-T4T D561710000060DIODE1SS55-T4T S.=Surface mount D571710000060DIODE1SS55-T4T D581710000060DIODE1SS55-T4T D591710000060DIODE1SS55-T4T D601710000060DIODE1SS55-T4T D611710000060DIODE1SS55-T4T D621710000060DIODE1SS55-T4T D631710000060DIODE1SS55-T4T D641710000060DIODE1SS55-T4T D651710000060DIODE1SS55-T4T D661710000060DIODE1SS55-T4T D671710000060DIODE1SS55-T4T D681710000060DIODE1SS55-T4T D691710000060DIODE1SS55-T4T D701710000060DIODE1SS55-T4T D711710000060DIODE1SS55-T4T D721710000060DIODE1SS55-T4T D731710000060DIODE1SS55-T4T D741710000060DIODE1SS55-T4T D751710000060DIODE1SS55-T4T D761710000060DIODE1SS55-T4T D771790001780DIODEMA700T D781710000160DIODE1SS133T D791710000160DIODE1SS133T D801790001780DIODEMA700T D811790001780DIODEMA700T D821790001780DIODEMA700T D831790001780DIODEMA700T D841790001780DIODEMA700T X16050006930XTALRF-4A3 FAT NKD (9.8304 MHz)T L16140000100COILLR-22AT L26140000930COILLR-116T L36140000930COILLR-116T L46140000070COILLR-19T L56180003300COILT6-222J (2.2M)T L66110002750COILLA-459T L76110002760COILLA-460T L86110002770COILLA-461T L96110002780COILLA-462T L106110002790COILLA-463T L116110002800COILLA-464T L126110002810COILLA-465T L136110002820COILLA-466T L146110002830COILLA-467T L156110002840COILLA-468T L166110002850COILLA-469T L176110002860COILLA-470T L186180000900COILLAL 03NA 101KT L196910000670COILBL01RN1A1D2B (BL01RN1-A62) AT-130E onlyT L206910000670COILBL01RN1A1D2B (BL01RN1-A62)T L226910000670COILBL01RN1A1D2B (BL01RN1-A62)T L236910000670COILBL01RN1A1D2B (BL01RN1-A62)T L246180000900COILLAL 03NA 101KT L256180000900COILLAL 03NA 101KT L266910000670COILBL01RN1A1D2B (BL01RN1-A62)T L276910000670COILBL01RN1A1D2B (BL01RN1-A62)T L286180000900COILLAL 03NA 101KT L296180000900COILLAL 03NA 101KT L306910000670COILBL01RN1A1D2B (BL01RN1-A62)T L316180001220COILLAL 04NA 100KT L326180000880COILLAL 03NA 100KT L336180002270COILLAL 03NA 470KT R17010004190RESISTORR20J 1 kT R27010004670RESISTORR50XJ 22 T R37010004670RESISTORR50XJ 22 T R47010003340RESISTORELR20J 330 T R57010003740RESISTORELR20J 470 kT R67010003240RESISTORELR20J 47 T R87010004320RESISTORR20J 10 kT R97010004230RESISTORR20J 2.2 kT R107010004410RESISTORR20J 47 kT R117010003440RESISTORELR20J 2.2 kT R127010003480RESISTORELR20J 4.7 kT R137010000290RESISTORELR25J 220 T 5 - 1 SECTION 5PARTS LIST REFORDER DESCRIPTIONM. NO.NO. REFORDER DESCRIPTIONM. NO.NO. M.=Mounted side (T: Mounted on the Top side, B: Mounted on the Bottom side) TUNER UNIT R147010003950RESISTORR20J 10 T R157010004320RESISTORR20J 10 kT R167070000730RESISTORCRH200 R-02J 330 T R177070000731RESISTORERG2SJ 331 (330 )T R187070000721RESISTORERG2SJ 271 (270 )T R197070000291RESISTORERG2SJ 221 (220 )T R207070000291RESISTORERG2SJ 221 (220 )T R217070000291RESISTORERG2SJ 221 (220 )T R227070000301RESISTORERG1SJ 331 (330 )T R237070000301RESISTORERG1SJ 331 (330 ) T R247070000711RESISTORERG1SJ 271 (270 ) T R257010004410RESISTORR20J 47 kT R26