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Search: Posts Made By: Gerula
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Forum: RC Tanks
12-11-2010, 11:41 AM
Replies: 19
Views: 1,300
Posted By Gerula

RE:

 OK, I did some more testing, to eliminate a few possibilities:

 1. With the turett 8-pin connector detached, I connected the LED to the green and white wire soldering points of the PCB. Still got...
Forum: RC Tanks
12-11-2010, 11:15 AM
Replies: 19
Views: 1,300
Posted By Gerula

RE: RE:

I didn't changed the capacitor (didn't had a spare and shops are closed ) just checked it with the ohmmeter (it's taking charge and going up to infinite ohm) and re-soldered it.
Forum: RC Tanks
12-11-2010, 10:38 AM
Replies: 19
Views: 1,300
Posted By Gerula

RE: RE:

I already checked that yesterday




So, as long as the LED circuit is closed, the pulse current sent to it in order to flash the leds will somehowcreate interference tothe speaker.
Forum: RC Tanks
12-11-2010, 10:26 AM
Replies: 19
Views: 1,300
Posted By Gerula

RE: RE:

With the turett harness unplugged there's no heartbeat. By soldering out the leds you mean opening the circuit or removing the LEDs but keeping the circuit closed? (this can be achieved by simply...
Forum: RC Tanks
12-11-2010, 05:02 AM
Replies: 19
Views: 1,300
Posted By Gerula

RE: RE:

Any ideas?
Forum: RC Tanks
12-10-2010, 03:00 PM
Replies: 19
Views: 1,300
Posted By Gerula

RE: RE:

Well, the capacitor is charging and that's pretty miuch what I'm able to test with my digital ohmmeter. I resoldered it by bringing it closer to the board, everything looks well, but I still have...
Forum: RC Tanks
12-10-2010, 02:16 PM
Replies: 19
Views: 1,300
Posted By Gerula

RE: RE:

Yup, that's C14. (you mean the one marked by you as 1, right? ) 2 is a small transistorand 3 is C2

It seems soldered OK on my board. The problem is that I only have a digital ohmmeter, so it will...
Forum: RC Tanks
12-10-2010, 02:02 PM
Replies: 19
Views: 1,300
Posted By Gerula

RE: RE:

Here is the other side of the board.

The big resistor from the back connects to the small C1 and to the larfger C14.
Forum: RC Tanks
12-10-2010, 01:50 PM
Replies: 19
Views: 1,300
Posted By Gerula

RE: RE:

You mean this capacitor?
Forum: RC Tanks
12-10-2010, 01:31 PM
Replies: 19
Views: 1,300
Posted By Gerula

RE: RE:

C156 is the one soldered on the back of the speaker plug? I don't have C16 marked on the PCB, but this looks like an obvious choice.
Forum: RC Tanks
12-10-2010, 01:18 PM
Replies: 19
Views: 1,300
Posted By Gerula

RE: RE:

Thing is I have two Rx13 tanks now, and the difference between them is quite clear: one hardly does the heartbeat (you have to put your earnear the speakerto hear it) while the other is quite loud....
Forum: RC Tanks
12-10-2010, 12:56 PM
Replies: 19
Views: 1,300
Posted By Gerula

"Heartbeat" effect in the speaker when leds are flashing

I just noticed that when the leds are flashing (before powering up the tank from the remote) there is a "heartbeat" sound in the speaker, synchronised with the flashing of the leds. Is the speaker...
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