Internal circuitry needs repair, which is a task for a repair shop with access to diagrams and test gear.
SOURCE: after broadcast squelch sticks
trace back from the squelch control to the first and second transistors and you will find one of them is bad, or the components connected to them, one transistor acts as a switch when a voltage from the automatic gain control turns the transistor on via the gate terminal.
SOURCE: scanner wont scan
provided you turned the squelch know and it didnt help, i would trace back from the squelch control to the first and second transistor you come to and that should be the squelch circuit. if you know how to check them with an ohm meter you can find out which one it is, if not you can just replace them both for under 5 bucks.
SOURCE: acts like squelch is stuck
I had the same problem. Your board may be fried. I had to buy a new unit.
SOURCE: the squelch will not turn down?
Sounds like your squelch pot is either shot or disconnected. If you're electronics handy, you can troubleshoot it yourself and replace the pot if necessary. You can also send the scanner to Uniden for repair. Follow the link below for troubleshooting help or to contact Uniden regarding repair.
BillB
http://support.radioshack.com/support_electronics/doc68/68646.htm
SOURCE: Last night was working fine
Hopefully Resetting or Initializing the scanner will clear the problem and get it working again for you. Instructions for these procedures are on page 38 and 39 of the scanner operating manual. If you don't have the manual, you can download and print it, at no cost, here:
http://support.radioshack.com/support_electronics/doc69/69887.pdf
Bill B.
Listening in since the 60's
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