old futaba fp-r4f dead ch1
07-07-2005, 09:07 PM
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old futaba fp-r4f dead ch1
I have an old reciever with no response from channel1 or ailerons.The problem is definately the reciever becuase we ruled it out with another radio.Also in the static state the voltage on chan 1 is different than all others,all others being the same.I think the problem is an ic called ba633 which there is no cross reference for .I checked almost every cross reference manual and website known to man.That chip seems to process all the raw data going to the servos.I don't have a schematic but the chip bridges the gap from radio to servo.Anyone have any ideas.Reciever fp-r4f Am ver, Transmitter fp-t4nl. Tryin to fix it for a friend.
07-07-2005, 10:31 PM
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RE: old futaba fp-r4f dead ch1
I think I've got 2 of these receivers in the shop. They are both 75 mhz. The transmitters never got narrow banded so I don't have a use for them. If you're interested, send me a PM with an offer.
