How do I change bits on P/Cable 690LR?

I don't exactly understand the question. You just undo the bolt through the terminal and it will lift off, if stuck just give it a twist. The other end of the cable is connected to the starter. this may be a bit hard to get to. Undo the negative cable before you do any of this so that you do not get any shorts. Put the negative terminal on last. this is for safety.

Have you tried taking out the collet and cleaning it and the cavity where it goes? If there is any wood dust present it may be causing the problem. If that doesn't fix it, you may need a new collet.

First, set the bit to where you want to measure from. This is usually done by setting the router on a flat surface and raising or lowering the bit until the end just touches the surface, Then set the zero on the ring to line up with a line on the router motor body. Each mark equals 1/64". The 1-8 marking means 1/8" and so on. Don't move the ring, rotate the router motor body to set the depth. Read the new depth where the line now meets the ring.

It controls the depth of cut. Loosen the clamp at the back of the router and turn the motor until the bit touches the workpiece. Tighten the clamp. Turn the wheel until the line on the motor housing is at zero on the wheel. Loosen the clamp and turn the motor to the depth (on the wheel) of your desired cut,ie 1/4 ". retighten the clamp and your cut is set for 1/4th inch.

On my older Sears router there is a lever on the base near the collet nut that you slide to engage the motor shaft to lock the motor shaft for bit changes. On newer models you may have a button or different mechanism to lock the shaft. After the shaft is locked you can use a small wrench to loosen the collet nut, usually by turning it counter-clockwise (viewed from the base). Once the nut is loose the bit should slide out (sometimes the bit is stuck in the collet and the nut may need to come all the way off to get them apart). Just replace the bit with a new bit with the same shaft diameter, tighten the nut, and you are set. If the new bit has a different shaft diameter than the old bit you may need to change the collet also (in general, different collets are used with different bit shaft diameters).

I would suggest going to Dewaltservicenet.com and typing in your model number for an owners manual for this tool. If you still need more help let me know and I will try.

Changing Bits: 1. Unplug the tool. 2. Turn the knobs on either side of the tool to loosen the base. 3. Remove the base. 4. Press the spindle guide to lock down the shaft. 5. Use a wrench to loosen the collet. 6. Remove the bit and collet. You may have to tap on the collet to loosen; careful not to tap on the cutting edges of the bit. 7. Insert the new bit and collet. 8. Use a wrench to tighten the collet into place. 9. Replace the base.

you proably need a router table to use a1 1/4 bit safely

well it will be the swicth