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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/5TP3ZXH645VCYHPO7VBJUHTGVH2WDDQV/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "[email protected]",
    "message_id_hash": "5TP3ZXH645VCYHPO7VBJUHTGVH2WDDQV",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/5TP3ZXH645VCYHPO7VBJUHTGVH2WDDQV/",
    "sender": {
        "address": "w9gb (a) icloud.com",
        "mailman_id": "b156075684ac4750b888b2dd14137a40",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/b156075684ac4750b888b2dd14137a40/emails/"
    },
    "sender_name": "Gregory Beat",
    "subject": "Re: [amsat-bb] elev rotor",
    "date": "2017-09-08T20:31:28Z",
    "parent": null,
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/LR4VCYNADZEU5JFFKZDWCITH5KALHHG2/"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Yaesu G-5500 AZ-EL Rotator manual (schematic LAST PAGE)\nhttp://www.radiomanual.info/schemi/ACC_rotator/Yaesu_G-5500_user.pdf\nLook at the Yaesu G-5500 Schematic diagram, to start your Troubleshooting.\nParts readily available from Yaesu USA or Electronics Distributors (Digi-Key, Mouser).\n \nUNPLUG Rotator Controller from AC Line Voltage, before Opening Case.\nHave your bench DVM/VOM for testing Diodes within unit.\n\n1. Failure [open] of the Toshiba 1S5188 diodes (D14, D16, D18, D20, D21) would cause remote control failures -- via DIN 8-pin connector.\n2.) The Texas Instruments RC4558, Dual General-Purpose Operational Amplifier, is active component (Q3 and Q4) for Analog Meter operation.  May have damaged a section of that IC.\n==\nToshiba was OEM supplier to Yaesu.  \n1S1588 is a silicon diode, U = 35V, I = 120mA, applications: fast switch\n\nEIC 1S1588 Data-sheet, High Speed Switching Diode, DO-35 Glass Case, ~35 V\nhttp://www.eicsemi.com/DataSheet/1S1588.PDF\n\nTexas Instruments RC4558 Product Page\nhttp://www.ti.com/product/RC4558\nThe RC4558 device is a dual general-purpose operational amplifier, with each half electrically similar to the µA741, except that offset null capability is not provided.\n\nAppears you had an ESD event.  Lightning strike nearby?\nhttp://www.sunsunsun.net/kd4app/amsat/g5500.htm\n\nReplacement G-5500 Controller from Yaesu USA Parts: $300.00\nhttp://www.yaesu.com/?cmd=contactus\n\ngreg\nw9gb\n===\nDate: Fri, 8 Sep 2017 19:14:23 +0000 (UTC)\n\nHello,\nMy Yaesu G-5500 works only manually for Azimuth & Elevation\n1.) No meter indication on Elevation. \n2.) No computer control using SATPC32 application.\n\nIdeas for troubleshooting ? \n73 Bob W7LRD \n--",
    "attachments": []
}