behrooz_gh,
It's probably happening because the HT-TZ315R is auto-detecting a signal based on the feed. Since the feed can change (as picture resolutions change), it is likely adjusting to the source picture and switching accordingly.
If you notice a drop in picture quality, you might want to just run the photos from the WiseLink feature in the A650.
Keep me posted.
--HDTech
I have purchase HT-TZ315R with my 46A650Air lcd and when I want to watch slideshow via flash inserted into HT-TZ315R usb port it starts showing images but suddenly it says resolution changed to 720 and I don't know why. LCD shows the same pictures via it's USB port with 1080 resolution but HT-TZ315R player reduce resolution without no reason. What might be the problem?

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