Philips FM92E, Manual

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13: Faults:
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If all led’s are lit when you switch on, then there may be no EPROM in the transceiver.
•
If the transceiver switched off after a few seconds of turn on, then it is expected that a new EPROM is
needed.
•
If the left dot of the 7 segment display is on, this indicates a programming or memory error.
•
If the right dot of the 7 segment display is on, this indicates a power out of range problem.
The red light comes on when the output doesn't reach a set level, either due to antenna mismatch or PA
stage failure.
It also comes on if the PA over-heats, and automatically backs off the output power.
Setting the output power trimmer pots on the control PCB too low, or the 25W set trimmer in the PA too
low will also bring up the red dot.
I can't remember precisely, but low battery voltage and out of lock VCO may also turn on the red dot???
In any case, I'd take a close look at the 13.8 volt supply voltage and current, because it could be a
cooked power supply (that may explain why the squelch is open....).
There is also the infamous internal regulator chip problem (a fix is described elsewhere.).
Otherwise it's most likely that you've cooked an output transistor if the right dot comes on, since these
radios are only made to run with a duty cycle of about 5%.
Philips FM92E Conversion to 6 Meters: Version 3.9 Page
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