View Full Version : Sound broken on aux bypass
01-24-2007, 03:25 PM
This is a recent occurrence and only occurs on aux bypass. The sound comes through the left channel only and quietly "squeeks" on the right channel.
When in normal mode (either live tv or playback) the sound appears normal but i can hear occasional sound breakthrough from the digibox. This happens even without playing anything. i.e. if I display the "now showing" screen I can hear distorted audio quietly but annoyingly that is breaking through. This sound is definitely coming from the digibox through the scart cable.
I think this is a hardware fault. I have tried several different scart leads, swapped the digibox, and rebooted the tivo but nothing helps.
Has anyone come across this before?
01-24-2007, 04:44 PM
Have you tried a soft-reboot of Tivo "Restart The Recorder" rather than a mains power cycle?
Perhaps this is a variant on the sound/video swithing chip not initializing properly.
01-24-2007, 04:56 PM
No I haven't but that is something I def will try. Thanks.
Could also be a problem with signal feedback over SCART. A single SCART cable can take an incoming and outgoing signal simultaneously. My TV tries to route the signal it's displaying back out through SCART 2 all the time. If you have a loop including the STB and a VCR or DVD recorder that might be a problem.
Have you tried STB>AUX in on Tivo>TV SCART with no other connections?
Have you tried plugging the Tivo TV SCART output into a different SCART socket on the TV to try isolate the problem?
You could also try connecting a DVD player (playing) to the Tivo AUX to see if that also exhibits the problem?
01-25-2007, 01:56 PM
A soft reboot does not cure the problem.
Anything fed into the TiVo's AUX scart has no right audio when the TiVo is switched to AUX-bypass. When in normal viewing mode both audio channels are present but there is minor sound bleed from whatever is plugged into the TiVo's AUX onto the right channel - even when TiVo is showing a menu such as "now showing".
The audio that is present on the phono sockets works fine.
Therefore, whatever is causing the problem is somewhere in the circuitry that switches the aux-in scart connector through to the tv-out scart.
01-27-2007, 03:53 AM
:rolleyes: I would disconnect all the scart leads and plug them back in if this does'nt cure the fault check the soldering on the scart leads sounds as if the solder may hav perrished on the audio out.
01-28-2007, 05:32 AM
Thanks, that's what I was thinking. I have resoldered all of the scart pins onto the mobo. That didn't change a thing. I am not skilled enough to check the soldering on anything smaller than the scart pins so I guess I'll have to leave it as it is.
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