My Sony DVC-TR11 will no longer play tapes.

If you mean Sony CCD-TRV128 they have been obsolete for a good length of time now.
The main issue with these, back 20 years ago, was the door catch.
It gets bent from misalignment or forcing the door closed. Sometimes it can be fixed but often as it is so old, spares are no longer available.

You can still get mini-dv tape cleaners on Amazon.

Sony DVC Cleaning Tape Discontinued by Manufacturer

Clean the video heads. You can get a head cleaning tape. But the best solution is to take the top cover off and spray the Video Head with Servisol Video 40. Use cotton buds to clean any bad dirt off. Clean all the surfaces the tape touches. Allow to dry before putting a tape in. You might have to do it more than once. It will also take longer to clean if someone in the house is a smoker.

The fault seems to be in the sensor and the mode switch of the loading system which is connected with the main controller processor and loading driver.
This can be a failure of the tape end detector which is a IR - infra red- emitter which is placed in the center of the tape tray and MUST feed continuous signal to the END IR detectors placed at either ends.
Also the tape seems to load with a false detection of the cassette within when the tray is closed for this reason of the failure along with a possible misplaced mode switch settings. This triggers to make the loading move without a reason and so can be due to failure of the the mode switch or unbalanced settings.You will need some experience to remove the tray unit, then check on the IR sensors and also check the settings of the loading drive and mode switch.

Sir plz Change your Device or clean the head by head cleaner dvc

I have the same problem. The only solution I've found is to manually wind the tape forward about 15 seconds and it works fine again. The problem only occurs if I let the tape wind all the way to the beginning.

I have the same problem. If I remove the battery for a few seconds, then replace the battery and wait about 5 seconds, the tape compartment closes.

I found that part #T5B was on the bottom of the VCR tape tray on the right side of the VCR tape bay opening and was spring activated by inserting the tape to allow the tray to retract into the player mechanism. Without a tape installed, part T5B prevents the tape carriage from retracting.
However, I still couldn't get the whole mechanism timed properly, and gears were skipping teeth, the mechanism was still binding, and shutting the power for the whole player down. Therefore, I removed the rubber drive belt that operated the VCR tray insertion/ retraction process, and disabled the VCR side from operating at all. This allowed the power to remain on and allow the DVD side to work properly.
This worked only for the Phillips DVP3150V/37. I cannot say for certain if other Phillips players are the same.

The physical tapes are the same size, but the encoding on the tapes are different. Unless the panasonic recorder can play DVcam, you're out of luck.

Dan

Hi Luigi, Have you tried playing the tapes on a different camcoder we would want to start by a process of eleimination.