That was a pretty nasty looking scanner thankfully my radio is much better, I bought it brand new when it first came our.Hi, Silly Question, I take it that you have tried to reset the CPU ?
Press and hold [CLR]
Press in and release the reset pip switch at the back and the display goes blank
Turn off radio, Turn on radio.
Check the 5v regulator for bad connections, especially screw to chassis.
See below for location detail
Realistic Pro-2006 Scanner Refurbishment (unit b) – Mersey Radar
Hope this helps.
I did push the clear button and reset button and the radio display came on and scanned with all banks active. Problem is when I shut the radio off and restart it, it resorts back to its old state, which is locked on channel one and no button works.try g and g communications in new york state
I will let you know tomorrow how unplugging the radio and taking the battery out works.As soon as one of the buttons are stuck it will disable the whole key section. If that's the problem you cannot do a complete reset as the CLR key doesn't work. Remove the battery and disconnect power and wait till next day to power on.
I have had it apart and did clean the keypad and PC-4. I have cleaned these two before ( used a damp cloth ) also tried WD40. After the last cleaning it was okay for awhile but as I use my computer now with DSDPlus and Unitrunker and or SDRSharp, the radio has been sitting around not being used. When it was in use it was to monitor Mil Air only, but each time I turned it on the keys became less and less responsive until yesterday when it just refused to work. Right now it is inoperable as i pulled one of the wires off the on/off switch also broke my soldering gun, so right now everything is on hold. One step at a time i have to get another soldering gun.When you press that little reset button it resets the CPU but doesn't clear any memory as you'll need the CLR button to work to be able to do that. The disabled keypad gets cleared when you reset the CPU and the scanner probably works as it should, besided that no button works.
When you power on the scanner it senses that a button is stuck, or the connector to it is faulty or something, and it stops working. I.E. there's probably nothing wrong with those ICs or transistor.
I would try and take the keypad apart and clean it and examine the contacts to the main board.