RD8000 - Throttle Cut Off Problem

[David Harmon]

Larry...you might want to post a question on RCU
http://www.rcuniverse.com/
and/or call Airtronics before you go to all the trouble to send it out
here.
 
 

Regards

Dave Harmon
NSRCA 586
K6XYZ at comcast.net
Torrance, Ca. 

-----Original Message-----
From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]
On Behalf Of jed241 at msn.com
Sent: Saturday, July 12, 2003 9:22 AM
To: NSRCA
Subject: RD8000 - Throttle Cut Off Problem


I have a New, never been used, RD8000 Transmitter.
 
After setting up this system in a Focus and completing all the required
adjustments for all the control surfaces,  and all the other nuances,
the throttle was last to set-up...Easiest right...NO...
 
I have been playing, reading, fiddling, all trying to get the Throttle
Cut-Off (TCO) and Trim to operate properly. After about two hours, here
is were I'm at:
 
1) The radio appears to be assembled properly from a mechanical
standpoint. Inspected throttle/rudder gimble and wiring. Wiring seems to
be consistent with a Good RD6000.
 
2) The TCO/Trim seems to only work when the Throttle is wide open (stick
in the up position). This is opposite of a good RD6000 I've been using.
 
3) I swapped crystals to an RD6000 and all operates properly. Problem is
in the X-Mitter.
 
4) Servo reversing works, but doesn't change TCO or Trim.
 
5) There are no system settings that appear to change the TCO/Trim to
the low end (Stick in the down position).
 
6) The RD6000 does not respond to TCO/Trim at full throttle which is
normal. Actually as you open up the throttle to full, the TCO/Trim
becomes less effective and null at full throttle. This is the exact
opposite of the RD8000. My initial thought was the the stick was
installed backwards...It's not...
 
Am I missing something? It appears that either there is a SW problem or
wires are crossed or wrong part is used for the throttle.
 
For those Hard-Core Futubooboo (Futaba) or Junior Radio (JR) Fans, I'm
an Airtronics guy. Won't change unless they go out of business or don't
fix my radio...<VBG>
 
Any thoughts before I send it back for repair?
 
Larry Diamond
NSRCA 3083
AMA 5024

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.f3a.us/pipermail/nsrca-discussion/attachments/20030712/03dd8b1c/attachment.html