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Old Mar 25, 2010, 05:33 PM
ashdec87 is offline
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ya I think they did, components arent in the same place..
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Old Mar 25, 2010, 11:16 PM
masam54 is offline
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If you can post pics maybe some guys here can identify?
Old Mar 26, 2010, 12:02 PM
ashdec87 is offline
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here's the picture of the board.
Old Mar 26, 2010, 12:56 PM
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Did you look under there?
Old Mar 26, 2010, 01:06 PM
ashdec87 is offline
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yep I checked, nothing there, and no jumper under the glue either.
Old Mar 26, 2010, 01:23 PM
masam54 is offline
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What about this IC?
Old Mar 26, 2010, 02:35 PM
ashdec87 is offline
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its 4126
Old Mar 28, 2010, 05:33 PM
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Is recommended to use a 2K2 cap with a 10k resistor to get rssi output from the corona rp8d1? Or only a 10k resistor is enough?
I want to use it with poor man osd.. (adc2). In OSD all I have to do is solder a wire to the adc2 input?


Thanks
Old Mar 29, 2010, 12:55 AM
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Futaba R137HP

0.38 - 2.12V

Old Mar 29, 2010, 02:51 AM
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I have had some help from Blueangel regarding pin position for my Futaba R149DP RX but when I opened the rx up it looked slightly different to the pictures I have seen. Can anybody point out the pin position for it please.
The chip reads "FP6302B 4172B01-2"

In the first picture I was told that the rssi pin was the middle tab just slightly to the right and at the top of the chip.
Regards Liam.
Old Mar 29, 2010, 03:22 AM
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Indeed, like in https://www.rcgroups.com/forums/show...6#post14030109
Old Mar 29, 2010, 12:55 PM
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Quote:
Originally Posted by RENATOA View Post
Thank you Remy, will slowdown soon, I must build and fly more than watching forums.

@areis81, sorry, but from your post #70 I thought you are clear now.
31136 is one of the two well known universal chips, rssi is on pin 12.
Read #18 also, please.

@Ceccoz, can you check the levels on red circle pad? Even if circuits are different, there are chances that pin to be RSSI. I would like also have a picture of the other side of the receiver.
Thanks as you can see there are a number of small black objects on the circuit bourd next to the chip (don't know what they are called lols) which are positioned slightly different to mine and I was just unsure wether this made any difference. I will check with multi meter later.
Regards Liam.
Old Mar 29, 2010, 01:03 PM
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So I took a voltmeter to the IC. I found a pin that has an output of ~2 volts with the tx on, and 1.6 volts with the tx off. Does that sound like the rssi pin? No other pins do this...
Old Mar 29, 2010, 04:29 PM
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Hmmm, too small swing... receivers known by me has a 0.3V - 3V variation when tx on-off...
Old Mar 29, 2010, 08:57 PM
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oh man this was annoying, but I mapped out every pin on the board. three pins stand out, drop of 1) 3.29 to 1.62, 2) 2.11 to 1.38, 3) 2.13 to 1.39

Any thoughts, that's all I got. Half of one chip is covered in hot glue so I couldnt check it..


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