"Michael" wrote in message
...
I have a Kyocera R451 receiver that when it's tuned to maximum signal and
gets stereo, the display readout is .1
meg high

ie....

107.9 shows as 108.0

There are (2) HA11225 FM chips on the pcb and a number of tunable parts
surrounding the chips but is this probably a microcontroller problem?

Is there anything regarding the HA11225 chips that will get this back on
center and read right?

Thanks very much.

I would suggest that the demodulator tank is slightly off tune, so when you
are tuned for maximum signal and stereo resolution, you are actually
slightly off tune. Set the radio to read the correct frequency, then
slightly adjust the demodulator coil, using ONLY an appropriate brass or
plastic trim tool, NOT a screwdriver, until you have correctly resolved
stereo, without distortion. This should correspond to maximum signal
indication.

If your demodulator is tuned to either side of the centre position on the S
slope, you will get exactly the symptoms you describe. The demodulator coil
will be right by the side of the IF subsystem / demodulator IC.

Rarely, similar symptoms can be caused by the IF strip being misaligned, but
in most modern kit, the IF filtering is carried out by ceramic resonators,
and it is very rare for these to drift off spec.

Arfa