{"product_id":"sansui-qrx-7001-quad-receiver-parts-repair-2ch-4ch-direct-work-read","title":"Sansui QRX-7001 Quad Receiver Parts Repair 2CH \u0026 4CH Direct Work Read","description":"\u003cp class=\"p1\"\u003eOffered for sale is a \u003cspan class=\"s1\"\u003e\u003cb\u003eSansui QRX-7001 quadraphonic receiver\u003c\/b\u003e\u003c\/span\u003e being sold \u003cspan class=\"s1\"\u003e\u003cb\u003efor parts or repair\u003c\/b\u003e\u003c\/span\u003e. This receiver has been partially tested and has a decoder-related issue that prevents normal operation in certain listening modes.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eThe receiver \u003cspan class=\"s1\"\u003e\u003cb\u003eplays well in both 2-Channel and 4-Channel Direct modes\u003c\/b\u003e\u003c\/span\u003e, producing clean audio through the amplifier sections. However, the \u003cspan class=\"s1\"\u003e\u003cb\u003eQS, SQ, and Surround decoder modes do not function properly\u003c\/b\u003e\u003c\/span\u003e.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eTo troubleshoot the issue, I have replaced and tested multiple decoder-related boards, including the \u003cspan class=\"s1\"\u003e\u003cb\u003eF-2086, F-2087, and F-2088\u003c\/b\u003e\u003c\/span\u003e boards, but the problem remains unchanged. Based on my testing, the fault appears to lie elsewhere in the decoder circuitry.\u003c\/p\u003e\n\u003cp class=\"p2\"\u003eA \u003cspan class=\"s1\"\u003e\u003cb\u003evideo demonstration is included\u003c\/b\u003e\u003c\/span\u003e showing the receiver operating and demonstrating the sound issues in the affected modes.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003e🔧 Known Condition\u003c\/b\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePowers on normally\u003c\/li\u003e\n\u003cli\u003e2-Channel mode works properly\u003c\/li\u003e\n\u003cli\u003e4-Channel Direct mode works properly\u003c\/li\u003e\n\u003cli\u003eQS, SQ, and Surround decoder modes are \u003cspan class=\"s1\"\u003e\u003cb\u003enot functioning correctly\u003c\/b\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003eF-2086, F-2087, and F-2088 boards have been swapped\/tested with no change\u003c\/li\u003e\n\u003cli\u003eVideo demonstration included\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"s1\"\u003eSold \u003c\/span\u003e\u003cspan class=\"s2\"\u003e\u003cb\u003eAS-IS for parts, repair, or restoration\u003c\/b\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003e🧱 Cosmetic Condition\u003c\/b\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"p2\"\u003eGood overall cosmetic condition with normal signs of age and use. Please review all photos for details.\u003c\/p\u003e","brand":"Eiko Vintage","offers":[{"title":"Default Title","offer_id":52655606726943,"sku":"QRX7001-ASIS","price":399.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0937\/9869\/5199\/files\/F7CFAAD2-1595-4FEB-9AFE-DDC865BA9394.heic?v=1783120792","url":"https:\/\/eikovintage.com\/products\/sansui-qrx-7001-quad-receiver-parts-repair-2ch-4ch-direct-work-read","provider":"Eiko Vintage","version":"1.0","type":"link"}