Received: from PCH.mit.edu (18.7.21.50) by mail.efplus.com (192.168.0.8) with Microsoft SMTP Server (TLS) id 8.3.485.1; Tue, 9 Nov 2021 07:07:30 -0800 Received: from PCH.MIT.EDU (localhost.localdomain [127.0.0.1]) by PCH.mit.edu (8.14.7/8.12.8) with ESMTP id 1A9EsN9a027792; Tue, 9 Nov 2021 09:55:18 -0500 Received: from outgoing-exchange-3.mit.edu (OUTGOING-EXCHANGE-3.MIT.EDU [18.9.28.13]) by PCH.mit.edu (8.14.7/8.12.8) with ESMTP id 1A9EsMDu027789 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL) for ; Tue, 9 Nov 2021 09:54:22 -0500 Received: from oc11exedge2.exchange.mit.edu (OC11EXEDGE2.EXCHANGE.MIT.EDU [18.9.3.18]) by outgoing-exchange-3.mit.edu (8.14.7/8.12.4) with ESMTP id 1A9EsGHh032591 for ; Tue, 9 Nov 2021 09:54:22 -0500 Received: from w92expo7.exchange.mit.edu (18.7.74.61) by oc11exedge2.exchange.mit.edu (18.9.3.18) with Microsoft SMTP Server (TLS) id 15.0.1497.24; Tue, 9 Nov 2021 09:53:34 -0500 Received: from w92exhyb6.exchange.mit.edu (18.7.71.111) by w92expo7.exchange.mit.edu (18.7.74.61) with Microsoft SMTP Server (TLS) id 15.0.1497.23; Tue, 9 Nov 2021 09:54:07 -0500 Received: from NAM10-MW2-obe.outbound.protection.outlook.com (104.47.55.102) by w92exhyb6.exchange.mit.edu (18.7.71.111) with Microsoft SMTP Server (TLS) id 15.0.1497.24 via Frontend Transport; Tue, 9 Nov 2021 09:54:07 -0500 Received: from MW4PR04CA0386.namprd04.prod.outlook.com (2603:10b6:303:81::31) by BL0PR01MB4225.prod.exchangelabs.com (2603:10b6:208:4d::16) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4669.13; Tue, 9 Nov 2021 14:54:05 +0000 Received: from CO1NAM11FT050.eop-nam11.prod.protection.outlook.com (2603:10b6:303:81:cafe::b4) by MW4PR04CA0386.outlook.office365.com (2603:10b6:303:81::31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4669.15 via Frontend Transport; Tue, 9 Nov 2021 14:54:05 +0000 Received: from mail-lf1-f44.google.com (209.85.167.44) by CO1NAM11FT050.mail.protection.outlook.com (10.13.174.79) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4669.10 via Frontend Transport; Tue, 9 Nov 2021 14:54:05 +0000 Received: by mail-lf1-f44.google.com with SMTP id b40so15594629lfv.10 for ; Tue, 09 Nov 2021 06:54:05 -0800 (PST) From: Justin Richards To: Microcontroller discussion list - Public. Sender: "piclist-bounces@mit.edu" Date: Tue, 9 Nov 2021 06:53:52 -0800 Subject: Re: [EE]: Sony LED TV repair update KD-60X6700E. 50 backlight LEDs in series. Thread-Topic: [EE]: Sony LED TV repair update KD-60X6700E. 50 backlight LEDs in series. Thread-Index: AdfVe4TQTd0vTzfCQRypxDuvJR3TKQ== Message-ID: References: <71580300-6182-f64c-f6fc-fb86d625bc03@audiovisualdevices.com.au> List-Help: List-Subscribe: , List-Unsubscribe: , In-Reply-To: Reply-To: Microcontroller discussion list - Public. Accept-Language: en-US X-MS-Exchange-Organization-AuthAs: Anonymous X-MS-Exchange-Organization-AuthSource: TS500.efplus4.local X-MS-Has-Attach: X-Auto-Response-Suppress: All X-MS-Exchange-Organization-SenderIdResult: Pass X-MS-Exchange-Organization-PRD: mit.edu X-MS-TNEF-Correlator: received-spf: Pass (protection.outlook.com: domain of gmail.com designates 209.85.167.44 as permitted sender) receiver=protection.outlook.com; client-ip=209.85.167.44; helo=mail-lf1-f44.google.com; dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=ePuwNtxYriKrvZshScrtzA+U6k7XFVQFEMz/Ti+dNiY=; b=OlU/ygB4H+G8rJJ5/S/Chy9ZjbH6ASMv2zypnhZEypMt0AiKfhKSXhuyPhRI7X4BBP UGiFABdZFnUfSuL30/57lFhiEu9CU8OIrCMf0xL89banfEuodgP5dotRjSi/f1YyyBIu vQMh7eWWqBvUiUscpy/ee9sw2RY6Uw9xxqNWc+Tj3DVCAok2kwmfOK1ftK/8d57cILn1 4gt/0/npDCeHSdqovETpssrSOyowo4PQN06Q73KuWTG1oAC4UWMQuc65Xt/9iH5vBHf7 gVxmsIsBGMxbNnRQbNI9idsxSKfyyBayS9WN3DO52x4/wWR7HltMSSZTG9m2Q5lPn+e9 f0Gg== authentication-results: spf=pass (sender IP is 209.85.167.44) smtp.mailfrom=gmail.com; mit.edu; dkim=pass (signature was verified) header.d=gmail.com; mit.edu; dmarc=pass action=none header.from=gmail.com; errors-to: piclist-bounces@mit.edu list-id: "Microcontroller discussion list - Public." list-post: x-beenthere: piclist@mit.edu x-mailman-version: 2.1.6 x-received: by 2002:a05:6512:965:: with SMTP id v5mr7440951lft.3.1636469643148; Tue, 09 Nov 2021 06:54:03 -0800 (PST) x-topics: [EE] x-content-filtered-by: Mailman/MimeDel 2.1.6 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 That is interesting and they or 3V3 zeners would have been an elegant solution but was too quick hitting "Buy It Now" on the LED strips. At least the strips will be quick to install but the shunts are still a tantalising option. On Tue, Nov 9, 2021 at 7:53 PM David Robertson wrote: > That is true. I guess the power dissipation would be higher since that pa= rt > has a 1v forward voltage in the on state, but that's probably not importa= nt > considering the power dissipation of the LED in normal circumstances. I > just thought it was interesting that there were devices specifically > marketed for this application. > > David > > On Tue, 9 Nov 2021 at 11:31, RussellMc wrote: > > > On Tue, 9 Nov 2021 at 23:50, David Robertson wrote= : > > > > A suitable wattage 3Vx zener would do most of that. > > > > > > Russell > > -- > > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > > View/change your membership options at > > http://mailman.mit.edu/mailman/listinfo/piclist > > > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .