Following on from my gearbox and gearbox mount repairs is my fix for the non working airsoft function ... this one was a bit more complicated
After checking all the wiring, the transmitter pot ( which was my initial suspect ) I stripped down the receiver to check for any problems in there, and found this...
Oh dear
... So I removed it to see if I could identify it
Not much to go on, and after removing you can see when it burnt out it took a track with it
Time to work out what it is and get a replacement. Pins 5 and 6 are joined as are 7 and 8. Pins 1 and 3 go to ground and pins 2 and 4 have a 3k9 resistor. As I do a bit of electronics work for a living I worked out it's a dual N channel mosfet.... Cost 6p each from RS
1st repair missing track
Had to order 25 from RS but they still only came to £1.80 including next day delivery, arrived this morning and soldered in
Reassemble the receiver
And test
Very pleased with the repair, cost me under £2.00.
Not an easy repair, but was very satisfying to do .... now to shoot some stuff
, and you're right. I dont think there's a component on there worth more than 20p. If it's broken you have nothing to lose and can learn a lot on the way. Good job replacing that little SOT23 device, you dont realise how tiny they are until you try and work with them, sneeze and they're gone 