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Compaq s910 standby
I have a Compaq s910 which works fully except for a clicking sound from it
when the monitor enters standby mode. What I know so far is that the clicking is just the degauser relay (nothing arcing). The monitor can only enter standby mode for a split second before powering up the transformer and tube etc, then a split second later goes back to standby mode and repeats the process forever. There is a IC (3843B) on the board which is cauing the main transformer to kick in, but don't know if its the problem or just a side effect. I have measured voltages from around the place and firstly have to say that I don't understand how the aforementioned IC can even function in that AC enviroment. I have got the schematics for everything. The important bits: http://members.iinet.net.au/~quadfour/3842B-3843B.pdf - IC schematics http://members.iinet.net.au/~quadfour/s1494-1.pdf - s910 PSU schematics http://members.iinet.net.au/~quadfour/temp.jpg - shows some voltages I've found. The schematics of the 3843B mentioned voltages well below the ~140AC I am seeing on its side of the transformer. Together with that I don't have a solid grasp on this (enough to replace components). Any ides on how to pinpoint the reason for the 3843B turning everything on after a split second of the monitor being in standby mode? Cheers Michael |
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