My Panasonic DVX100B: Loading deck won't eject the cassette

The auto-eject feature is normally triggered by the tape reaching its end. This causes the tape to tighten and then activates a trip lever that starts the eject cycle. Most auto tape decks that are not auto-reverse eventually have this problem. It is not usually the deck's fault, but it is with the tapes themselves. After many plays the tapes get wound too tight on the reels and drag, causing the auto-ejection. This is especially true with the thinner, larger tapes found in the C-90 and C-120 varieties. Try taking the tapes to a regular tape player and then fast-forward them from one end to the other and them a full rewind as well to loosen the tape on the spindles and re-distribute the tension. Hopefully this will work.

F06 means the mechanism is locking up after unloading. The cause of this can either be the carriage that the tape sits in, or the loading motor. It's important to check for damage on the carriage.

Incidentally I think this model uses a "K Deck Mechanism".
If you search the web for Panasonic K Deck you should find a PDF manual free.
In fact I have it on my blog site under service manuals.
http://therealchart.blogspot.co.uk/p/technical-help-tips.html

First of I think you have a K-Deck mechanism. If you do a Google search for "Panasonic K-Deck" you should find the free information. If you can't you will need to E-Mail me.
This sounds like a a timing problem, perhaps caused by some damage to the Cassette Holder. The mode switch could be part of the problem too. They are quite tricky to set up to get the timing right, I do know the Cassette has to be inside the machine to set it up. The good news is that parts are easy to get hold of, so if any thing is damaged it can be replaced. Curry's partmaster is a good place for parts.

Cassette decks have sensors on the reels which tells the deck when the tape is at the end. When the reel stops the deck switches the direction of the tape and sometimes the position of the head(depending on the deck design). Most common problem is the tape is hard to turn, or the deck won't turn it ( deck thinks it's at the end, click, still won't turn, click, won't turn, click) you should fast forward and/or rewind your tapes from start to finish once in a while to keep them lined up(narrow spool/less friction), you shouldn't have to but it works. BUT,...your problem sounds like a slipping or broken belt/or dirt causing the problem. Take the deck out to have a look and clean the capstans(rubber rollers)belts,heads with alcohol and a Q-tip while your at it. Dirt's usually the main culprit and if you do have some other problem, cleaning it is always a win/win (It will also sound better clean)

The loading is not completing and so the mechanism will not release the forward eject of the cassettte to work. So please check on the belt and if this is worn then the loading will not work as it will slip and so will not complete the loading back to rest mode.

You have what's called a Panasonic K-Deck machine. That code means the Mechanism locks after unloading the tape. The cause of this could either be the 'carriage' where the tape fits, or the Load Motor. Plenty of free information on line just type "Panasonic K-Deck" into Google.

Yes the most likely cause is the mode switch, you can spray it with Servisol Video 40 or replace it. But you will need the service manual for that. The good news I think your model uses a K-Deck, and there is plenty on-line about the Panasonic K-Deck.

Take it to a Panasonic authorized service center. They'll fix it.

Belts have become too slack to allow mechanism drive. Have replaced

there is a mechanical problem in your tape deck. probably a losen rubber band. it clicks because the rubber is too lose to move the mechinal parts. so when you power off, it losen the whole machanical parts..it is very easy to replace..opend the deck and check it out..good luck