I have a ryobi rbc30sbt, and the pull cord has jammed, it won't pull out. I have stripped it down, and it appears that the levers inside won't release. Can you help?

Try loosening it the opposite way, i.e. try tightening it to loosen it!

Stripped? Maybe the recoil Spring just broke. Easy repair, sometimes you can just re-bend the 'Stop' on the old Spring

It appears that the recoil spring has broken and you will have to pull it apart to replace it

your spring may be broke or might just have to rewind it they could be a pain somtimes

Remove the tube that holds the flex-drive shaft from the front of the motor cover.Remove the rear engine cover. Remove the throttle cable from the carburetor. Mark and unplug any wires for the on/off switch that go to the ignition coil (underneath front cover) if possible. Now if you have pulled the driveshaft tube out of the way, the clutch drum is up next. Inside it, screwed into the very end of the engine's crankshaft is a Torx #25 screw. Before you loosen it, you will have to lock up the engine. To do so, remove the spark plug. Pull on the starter until the piston is down, then insert a length of clean, soft rope into the engine. The engine will come up and compress the rope, thus locking it in place to allow clutch drum and clutch removal. Loosen the T-25 (Star bit or Torx head) screw inside the drum.. You may be able to remove it with a long thin-blade screwdriver also.It probably won't come completely out...it is made this way. Next, remove the clutch. It is screwed onto a small threaded section of the crankshaft Removal is counterclockwise.. It will be pretty tight. To help, apply peneterating oil. Whack the ears of the clutch near the center with a hammer and a dull flat-blade chisel or a small piece of wood unless there are bolts. then use a wrench. It will turn counterclockwise for removal and there will probably be a removal direction arrow on it's face. After getting that off, remove the Torx screws holding the cover to the engine. The starter unit should be mounted inside as it mates with the top of the flywheel to start the motor. Remember to preload tension (5-7 turns) on the starter unit. Make sure the handle is installed. Jam the unit with a screwdriver or vise grips so you can insert and tie off the new rope. Then remove jam device and let recoil pull your new rope into place while holding the handle. Reassemble and you are done. Disassembly requires Torx head drivers and a good flat-blade screwdriver. Post back if needed.

its probabley your throttle cable , try pulling the throttle full on when you starting up the trimmer word of warning though only do this on a very flat surface..

TAKE OFF THREE SQREWS AROUND PULL CORD BUT DONT REMOVE, CARFULY LIFT EDGE SLIDE SCREW DRIVER IN TO HOLD PULLEY WHEEL IN PLACE , TURN OVER AND INSPECT COULD BE DIRT AND DABREE OR ONE OF THE TWO METAL LEVER,S (UNDER) PULLY WHEEL ARE STUCK UNJAM AND RETURN CARFULLY PUT SCREWS BACK IN AND TITEN BUT DONT STRIP IT OUT FROM OVERTITENING

If it has ball bearings in the rachet mechanism they may be sticking and need cleaning so they move freely.!

It is usually just jammed, when you go out too far. Ifyou take the recoil starter off or loose , sometimes it goes back in on it own. If not ,carefully disassemble it and see if the recoil spring is broken. 

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Check if the Encoder Strip is Broken or Missing
1.Power down the printer and unplug the power.
2.Slide the cartridge carrier inside the printer a couple of inches to the left.
3.Locate the encoder strip (Figure 1) on the right-side of the cartridge carrier encoder strip
Note:
The encoder strip is a plastic strip with small markings over its entire length. The strip may appear to be translucent.

Reposition the Encoder Strip
1. Remove the power cord from the printer.
2. Lift the scanner unit to expose the inside, where the printer cartridges are located.
3. Gently slide the ink cartridge carrier to the middle of the printer.
4. Gently move the top part of the printer belt to the right.
5. Using an index finger, gently push encoder strip (Figure 1) down and then back up, to get it back into the slot located on the back of the ink cartridge carrier.
6. Gently press the strip first to the rear, and then forward, to ensure that it is seated correctly.
7. Manually move the ink cartridge carrier to the left, then to the right, to check the positioning of the encoder strip.
8. Once the encoder strip has been re-seated, close the scanner lid.
9. Re-connect the power cord to the printer.

Ensure the Paper Tray is Not Overfilled
Each printer tray has a maximum capacity rating, and this rating is based on a specific paper weight and or thickness. Consequently, situations might arise in which the tray will not be able to accommodate the maximum number of sheets listed in the printer specifications. Verify that the paper is not packed too tightly in the paper tray.