A
Amanda Riphnykhazova
Hoping this is a sci.electronics.repair problem: This concerns a Panasonic SAPT760 home theatre system which has been repaired once under warranty andsuddenly new problems have appeared. (most of which I can live with but I was wondering if anyone here recognised the symptoms).
There is an annoying half-second lag on sound output when played through the SAPT-760. Panasonic HT tech support said it is caused by the (Panasonic)Plasma TV. TV Tech support at first agreed and sent me a BIOS upgrade. The lag reduced to about a tenth of a second or less (this was almost definitely a coincidence) and has since increased back to about a half second again. If I play the TV sound at the same time as the digital HT, sound, you can hear the marked lag, with the TV sound being, of course lag-less.
Other problems with the HT setup which may or may not be relevant are that when I first got it, my Nano played and charged through the built in dock. Now it shows incompatibility which Panasonic confirms! But I am wondering how it played and charged formerly??
More importantly perhaps, on initial turn-on, when switching to the Toslinkinput, I initially get no sound whatsoever. Leaving it on digital input, after a few minutes, I start to hear a low frequency (3-4 hertz?) popping which slowly increases to about 10-15 Hz before the unit starts to recognisethe popping as the light based sound it is supposed to be decoding and then the sound quality is generally OK with no popping. But with that annoyinglag. All other inputs (including the DVD) are OK, which told Panasonic Tech support that the unit is performing properly and that the problem must bewith the signal coming out of the TV.
On one call, the TV people said they found some reference to an adjustable lag on the HT system but the HT people deny that any adjustment on this (orresetting to defaults) exists. There IS a time delay adjustment on the DVDside but it is set to zero.
Yes I DO know that there is some millisecond adjustment on individual speakers but this problem concerns a general half second lag on all speakers andall speakers seem to be set up OK on the in-built DVD system.
One last thing: The lag isn't always there: Sometimes the toslink sound (i.e. the sound from the tv into the HT) dissolves into a generalised crackling.
There is an annoying half-second lag on sound output when played through the SAPT-760. Panasonic HT tech support said it is caused by the (Panasonic)Plasma TV. TV Tech support at first agreed and sent me a BIOS upgrade. The lag reduced to about a tenth of a second or less (this was almost definitely a coincidence) and has since increased back to about a half second again. If I play the TV sound at the same time as the digital HT, sound, you can hear the marked lag, with the TV sound being, of course lag-less.
Other problems with the HT setup which may or may not be relevant are that when I first got it, my Nano played and charged through the built in dock. Now it shows incompatibility which Panasonic confirms! But I am wondering how it played and charged formerly??
More importantly perhaps, on initial turn-on, when switching to the Toslinkinput, I initially get no sound whatsoever. Leaving it on digital input, after a few minutes, I start to hear a low frequency (3-4 hertz?) popping which slowly increases to about 10-15 Hz before the unit starts to recognisethe popping as the light based sound it is supposed to be decoding and then the sound quality is generally OK with no popping. But with that annoyinglag. All other inputs (including the DVD) are OK, which told Panasonic Tech support that the unit is performing properly and that the problem must bewith the signal coming out of the TV.
On one call, the TV people said they found some reference to an adjustable lag on the HT system but the HT people deny that any adjustment on this (orresetting to defaults) exists. There IS a time delay adjustment on the DVDside but it is set to zero.
Yes I DO know that there is some millisecond adjustment on individual speakers but this problem concerns a general half second lag on all speakers andall speakers seem to be set up OK on the in-built DVD system.
One last thing: The lag isn't always there: Sometimes the toslink sound (i.e. the sound from the tv into the HT) dissolves into a generalised crackling.
