Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!cs.utexas.edu!yale!umich!sharkey!news.iastate.edu!ceres.physics.uiowa.edu!zaphod.mps.ohio-state.edu!rpi!clarkson! From: kaufmads@clutx.clarkson.edu (Dana S. Kaufman,TEP House,58520,) Newsgroups: comp.sys.amiga Subject: 2002 + 1084 monitor fix Message-ID: <1990Dec7.191245.934@ceres.physics.uiowa.edu> Date: 8 Dec 90 01:12:45 GMT Reply-To: kaufmads@clutx.clarkson.edu Organization: Clarkson University Lines: 47 Date: Wed, 5 Dec 90 20:32:21 GMT Message-ID: <1990Dec5.203221.4108@grape.ecs.clarkson.edu> References: Sender: @grape.ecs.clarkson.edu Here is the 2002 fix that many people have asked me for. I am not sure if it works for a 1084 monitor because I haven't tried it yet. It seems that it originally was a 1084 fix from some of the earlier mailings. It does definately work on a 2002. ------------------------------------------------------------------------ 2002 FIX Re-printed from message on comp.sys.amiga.hardware by jms@tardis.Tymnet.COM (Joe Smith) on May 19, 1990 Take off the cover of the 2002 and look at it from the back. Examine the printed-circuit (PC) board. To the left you should find the power connector, the audio connector, and the chroma/luma video connectors. That corner of the PC board is grounded and shielded by a piece of metal that is soldered on. To the right you should find an "L" shaped aluminum heat sink with a power transistor bolted to the right-hand side. (The planes of the heat sink are vertical and surround the flyback transformer. A thick wire comes out of the flyback transformer and connects to the upper side of the picture tube.) If you look under the printed circuit board, you should see two screws holding the heat sink to the PC board, and a bent metal tang that goes through a hole and also holds the heat sink down. I saw evidence of an electrostatic discharge that jumped from the metal tang to one of the copper traces on the PC board. This is the cause of the "snap" and "pop". The heat sink is not electrically connected to anything, and accumulated an electrostatic charge until it arced over. I simply ran a wire from one of the screws that holds the heat sink to the PC board over to a screw by the input connectors. Make sure the wire is insulated so as to not short out anything else on the PC board. I used an ohm-meter and verified that it showed zero ohms between the heat sink and the grounding shield. "Poof", no more pops! ---------------------------------------------------------------------------- Dana S. Kaufman kaufmads@clutx.clarkson.edu "I did not write this fix, I just re-typed it in" o