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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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Strange Noise from Grundig TV
Strange problem with a colour tv I have here. A very loud 50Hz-ish
sounding buzzing noise has been causing severe interference to low freqs, LW MW radio and conventional telephone which I traced its source back to the TV. Noise only appears when set is connected to aerial/scart which acts as a radiating aerial. TV works perfectly, but with a 'scope looking at both the inner and outer of the coax socket, there appears a significant waveform. It doesn't alter with picture changes so I presume it's not line timebase. Any ideas? It's a Grundig T70-1020. Richard UK |
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