Philips FM92E Manual page 28

3: Now comes the fun bit, to remove the ceramic board from the VCO module, you need to heat the module
case with a soldering iron placed on the side of the center metal post. [see photo below] Where the soldering
iron connects to the side of the metal post, which is soldered to the ceramic board, the heat from the
soldering iron will travel down the post and the solder will melt, allowing the ceramic board to come free.
You will need to use a pair of pliers or some other device to hold the module whilst this is happening, it will be
far too hot to touch! I used a large flat bladed screw driver inserted on the other side of the center post,
between the ceramic board and the VCO module case; Then gently twisting the screwdriver as the heat flows
into the solder connection between the center post and the ceramic board.
Remember – gently twist the screwdriver, you do not want to break the ceramic PCB. You can use the
right hand soldering iron of the de-soldering station with success. Too much heat and components on the
ceramic board will start to fall off.
Philips FM92E Conversion to 6 Meters: Version 3.9 Page 28