asterixx25

Last week i bought a new Futaba 7c 2.4Ghz with R617fs receiver.
After wrong side polarity i damaged the capacitor and the first regulator of the receiver.
I would like to ask you if you know, which is the voltge after the regulation or how much voltage needs the electronic components to work perfect.
Also the second component (47 10f) in the photo below is capacitor or diode?

asterixx25

Also if someone can measure for me the voltage at the red point i will explain him how he can do this

asterixx25

Anybody who can help me?

Hughes500E

My Feedback: (16)

Buy a new Receiver !

asterixx25

I am at last stage to repair the receiver and i want to know which is the voltage where the electronic circuit of the receiver works fine. 3.0V or 3.3Volts?

kirmikil

hi,

I have the same problem with you, but I could not find any answer, did you find any solution for this problem...if you have thank you in advance

asterixx25

Here is my post if you can translation the page i found a solution but i dont know if it is true

www.aeromodelistis.com/smfgr/index.php

kirmikil

Thank you for your reply, but my greek is not well enough did you find and apply solution if so is it workin

asterixx25

These are the components i have changed from farnell.

The codes are: 3605711 for the transistorTOREX - XC6201P332PR - V REG LDO +3.3V, SMD, 6201, SOT893
1702723 for the capacitor AVX - TPSB476K010R0250 - TANTALUM CAPACITOR LOW E

Also you must put some changes that you see in the photos here: www.aeromodelistis.com/smfgr/index.php
The 3 "legs" of the transistor must be glued on the right side.
If you see at the last photos the receiver works fine!!!

kirmikil

Dear Asterixx25,

Thank you very much for your kindly help, I received the parts a week ago, and I just have found time to put them on the card, I really surprised when I see the green light on it, thank you again

Regards
Kirmikil

bouw002

Good tip I had the same problem and fixed my receiver

asterixx25

Also if can find a TOREX XC6209 +3.3V SOT 89-5, i thing it's better component toadapt at PCB without modifies

www.semiconductorstore.com/pdf/newsite/torex/XC6209F252MR_DS.pdf

p0l1n

hi ! i just started to repair my receiver with your tutorial, i have 1.7Volt at the output of the regulator.

i see that you'r from Europe, and i'm living in North America, and i cant find regulator with the part number you give in your last post....

i just want to know if i need a regulator 3.3V 150mA, with an input of approx. 6V ?

thanks !

p0l1n

what voltage do you have at the input of the regulator ?

the first pin from top at the left

thanks

asterixx25

i just want to know if i need a regulator 3.3V 150mA, with an input of approx. 6V ?

I thing it's o.k. It doesn't matter, the input voltage will be from 6-10Volt
If you can find this TOREX - XC6201P332PR it's enough


At the input, yellow dot, you must have the battery voltage. About 4.8-6Volt
So, you can use either this
www.farnell.com/datasheets/578786.pdf or this
www.semiconductorstore.com/pdf/newsite/torex/XC6209F252MR_DS.pdf

The most important is, that you need a very low drop voltage reugulator

p0l1n

at the yellow dot i have 6V, for the regulator, i put one i have at home but not small than the original one, same for capacitor.

for regulator i put a 5V regulator and work very well. (part # MC7805CT)
i use standard 16V 47uF capacitor, not tantalium like original.

i do some range test, bind test, all ok, but only channel 1 not responding.... i'm working on that right now, i will come back with better pictures soon guys ! (dont check date on pictures, its from a old kodak...)

i call regulator and capacitor like you said on older post, but cant have them soon, so thats why i try with what i have at home and seems to work very well, i put a shrink on them and sure this Rx will work very well !

akshayb

Can somebody tell me value of missing cap

Mikecam

Wow I got to give you guys credit. For me $22 at HK would be the way to go.

asterixx25

the photos are missing...

akshayb

Picture #1 with green arrow shows part which is missing in picture #2 with red arrow