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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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Dell D1025HE Power Supply Prob. Schematic, Clues...?
I've got a Dell D1025HE 17 inch mnitor which was switched on whilst the
mains 230V power supply suffered a bunch of short interruptions/returns. After several of these short power cuts a wisp of smoke came out the back of the monitor and that was it.. Now Dead. The 6.3Amp internal fuse blows immediately on power on. I cant see any obviously damaged components, and I'm not seeing a short accross anything obvious. Does anyone have a schematic of the monitor, or even the power supply section, or any one got any ideas? It's a nice unit with a Sony tube and I really dont want to give up on it :-( Thanks, IainM |
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Dell D1025HE Power Supply Prob. Schematic, Clues...?
"Iain" wrote in message ... The 6.3Amp internal fuse blows immediately on power on. I cant see any obviously damaged components, and I'm not seeing a short accross anything obvious. Does anyone have a schematic of the monitor, or even the power supply section, or any one got any ideas? I've done a bit more digging, and the problem appears to be linked to PTC 2, which seems to be linked to the degauss circuit. NTC 1 seems to drive PTC 1 & 2 which feed the degauss coils. Desoldering these components, fuse stopped blowing. NTC 1 measures 5 ohms, PTC 1 measures 21 ohms, PTC 2 leg came off when component was wiggled, think it was already weakened. and hopefully the source of my blowing fuse. Monitor is working at moment with PTC 2 removed, but would really like to see the circuit and know exactly whatr I've done here... also need to find a component to replace it I assume.. or do I?? |
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