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<font face="Comic Sans MS">The new main board for the Syma X6 only
took 15 days to get here! It however is a different version of
the board. </font>It doesn't have an arrow on it like the old
board so you could tell where the front is. The motor solder pads
only match when you turn it upside down. I guess the standard is
motor 1 CW front left, motor 2 CCW front right, motor 3 CW right
rear and motor 4 CCW left rear. I will have to play around with it
to make sure it flies right. I was hoping it would be an easy wire
for wire job. I'll sit it aside as I am in the midst of a building
frenzy on a more serious quad copter...<br>
<br>
Alex Fraser wrote on 6/7/2015 4:23 PM:
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<font face="Comic Sans MS">I tried to solder the broken traces,
but just couldn't do it. I've ordered a new main board. </font>I
almost burned my nose trying to solder using a jewelers loup. At
10x it focused at about an inch. I always ask doctors if they are
getting rid of any of their old optics like they use in surgery,
that stuff is expensive. I might be able to salvage this board,
I've a plan for using a ribbon cable, but for a while this critter
will sit on a shelf as I have two other builds on the table. <br>
<br>
I did look up the chips. The RF chip was buried in a black goo,
but I found a reference to it in a RC forum. It's a nRF24L1 which
is a transceiver on 2.4 GHZ. Very low power. In the picture it's
on the RF deck. Under the ROHS sticker is the main processor a
STM8S00, 16 bit and IIRC can communicate at 2 MHz. It has on
board memory. In the overall picture the chip to the left of the
main processor is an Invensense MPV-3050c which is the 3 axis
gyroscope. It is used in cell phones so it is fairly cheap and
available. <br>
<br>
I wonder if the labeled pins on the RF deck are recognizable to
some folks right off. Vdd and GND I got. MISO, MOSI, SCK, CSN
and CE even looking at the data sheet were strange to me. Are
these common to all processors?<br>
<br>
Alex Fraser wrote on 6/5/2015 4:08 PM:
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<font face="Comic Sans MS"> I have to replace two motor
assemblies on my Syma X6 quad copter. That is a simple
straight forward solder job. I thought while I had the board
off the frame I might modify the antenna for more range. In
the first picture you can see the layout. The board is 1.82"
square</font>. There was a small board I call the "RF deck"
which laid flat on the main board. I suppose that is so they
can put whatever radio they want on the main board. I pulled the
RF deck upright to trace the ground so I could find a pad to
solder on the coax shield for the antenna, They had attached
the RF deck to the main board in the board construction, in an
oven I guess, so three connections on the bottom were soldered
to traces under the board. The traces of course broke when I
pulled on the board. When I fix it I'll leave it upright and
just hope it don't cause an RF problem, pick up noise or
vibration etc.<br>
<br>
<img alt="" src="cid:part1.02010305.04060002@comcast.net"
width="800" height="600"><br>
<br>
I circled the injured traces. It is at 2.4 GHz. I have no idea
what "RHOS" is but the label peeled off and I'm going to search
for that chip just for fun.,<br>
<br>
<img alt="" src="cid:part2.03090603.06060007@comcast.net"
width="800" height="600"><br>
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