Pedro, My manual shows this error code as the following;
PLL Err - appears if the HTX-212's PLL (phase-locked loop) section
malfunctions. If turning the HYX-212 off then back on does no correct this
error, take it to your local Radio Shack store to arrange for service. The
preceeding text was verbatem per htx-212 manual, cat. no. 19-1125. You may
want to try a reset using the following per the manual.
1. Turn of the HTX-212.
2. While holding down F+T-SQL, turn on the HTX-212.
All display elements stay on for about 2 seconds.
( you will lose all stored information and a good reset will "beep" 3 times)
If this does'nt work, you may have to go to Radio shack for help.
Good Luck de KC8COR, Paul, Battle Creek MI