Philips FM92E Manual page 46

Replacing Module into Board:
•
This is the real tricky bit. Check all of your soldering, have you any shorts, is there any shorts to ground.
•
Remember, at this point on, when the sides are sealed and you resolder the Rx module back into the
Receiver PCB and it does not work, then you will have to de-solder Rx Module and the module sides
and recheck your work again.
•
At this point, if you are not really sure, then before you even solder the sides on of the Receiver Module,
with a signal generator and receiver or spectrum analyser, you can check that the Rx amplifier is
amplifying, by setting up a test jig.
Rx Module Test Jig:
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Earth pins 1 & 6 of RF Amplifier side of RX Module. Be very careful of module pins, they can easily
break when soldering wire to them.
•
Apply a 10 Volt supply to pin 4 of the RF Amplifier.
•
Connect a 53.25 MHz signal generator to a 53.25 MHz receiver or Spectrum Analyser and note the
measurement out of the signal generator. [ie setup the signal generator to say Micro Volts.]
Philips FM92E Conversion to 6 Meters: Version 3.9 Page 46