Question about Panasonic DMR-EX85EB-S DVD Recorder/HDD Recorder
Excessive sibilance being experienced upon playback (of some) TV programmes and pre-recorded dvds. This is so severe in some cases as to make it intolerable. Might this be a set-up problem or is it an inherant fault with the DMR EX85?
You will have to test all the components in the hook-up for the source of the problem.Try recording to the dvd from some other source and see if you have the same level of noise on the playback. If you do then you have a problem with the dvd players or in the connections between the components.Assuming the speakers are not making the noise problem. You should check you cable set-up for interactive noise being produce from too many cables to close together or too close to a noise source and picking up noise from the source. To test this try isolatilating the cables from each other and other possible noise sources, like a/c lines and high magnetic field situations. If you solve your problem with this then you know its your hook-up having noise pick-up problems from a external source. Next try isolating the noise source by disconnecting components and cables fronm the hook-up until you find the problem. This could be a ground problem either in the source of the noise or in the cables. Try improving the grounding of the system by using new cables and earth grounds if possible. If the problem is in one of the components, it maybe several problems. Noisy amplifiers or components in the signal path. If the units being use are of some age it might be time to have them checked for such problems as aging components, like capacitors and ringing resistors in the signal path. This can be tested with a oscilloscope checking the signal path of the preamplifier sections and output amplifiers sections of the components.The testing can also show you, the amount of distortion on the signal at various stages of your recording and playback signal paths. You are probably getting high ripple content somewhere in the signal path from bad grounds or aging components. This noise is causing the distortion that you are hearing amplified from you speakers. if the cables are not the problem and it is some component in you system it is best to locate it and take it in for service.You can use your owners manuals to find the information for support for your products. I hope this has helped you with your problem.
Posted on May 19, 2009
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Posted on Jan 02, 2017
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