If problem is on an 800 MHz trunking system use a current control frequency and adjust T101 Trimmer as follows:
Open scanner as in the link for Mods DK to removing VCO cover.
A phillips slotted trimmer should be easy to find called TC101.
With scanner power applied and turned on, manually select the above CC (insure it is active).
NOTE: DO NOT cause any movement of any coils embedded with glue. If this happens, you will need expensive instruments to re-align properly.
Note the position of the slots in the trimmer and slightly adjust CW, if the noise level drops stop and carefully go the other way. Find the loudest noise available.
The trimmer is set.
Of course, you must sign my standard disclaimer. ______________________
If needed a folder called Service & Repair has additional info plus service manual at this link
http://groups.yahoo.com/group/pro92/files/