AH 27

Remove the 4 screws from the rear panel, remove the front cover (be cafeful not to loose the springs from the battery cover).

You will see some pads to the left of the channel display.

Solder a bridge across the S 07 pads for 120 channels
(these are on the far left at the top)

OR

Solder a bridge across the S 08 pads for 200 channels
(these are on the top to the right of the S 07 pads)

YOU CANNOT DO BOTH !!!

 AH 100

CBS 1000
CBS 500

CBS 2010

See Pic for peak-tweak places!

CM 10