RC India
Welcome Guest, please login or register.
 
Pages: [1]   Go Down
0 Members and 1 Guest are viewing this topic. Topic Tools Topic Tools 
Read
« on: February 06, 2016, 08:59:19 PM »
prajulad
Plane Lover
Active Member
**

Reputation Power: 1 
prajulad has no influence.
Offline Offline

City: Hyderabad
State: Andhra Pradesh
RC Skills: Beginner
Posts: 14
Join Date: Mar, 2014




Hello All,
I have a Spektrum DX7 (the older generation model Mode2 ) bought around 4 years ago. It was working perfectly when i used it back then without any issues after which it was lying unused for quite sometime.Took it out last month and checked it to see if all channels are working.
Here's what I found:

- Throttle channel doesn't transmit and does't seem to be working.
- All other channels are fine : Aileron, Rudder, Elevator etc.
- Even tried hooking it up with couple of simulators like ClearView SE and FMS flight simulator. Used SmartPropoplus joystick software to connect my DX7 to the simulators on my laptop. The throttle channel doesn't work in this scenario as well. It's not recognised at all. All the other channels are fine.

What could be the issue ?  Forum Moderators and other experts (DX7 users) please help me out. Sad . It's an expensive radio and I don't want to junk it yet..Any place I can get it checked for repairs?

Praveen
Logged
 

Read
« Reply #1 on: February 06, 2016, 10:09:44 PM »
rastsaurabh
Plane Lover
Forum Hero

*****

Reputation Power: 19 
rastsaurabh has no influence.
Offline Offline

City: Noida
State: Haryana
RC Skills: Intermediate
Posts: 1553
Join Date: Mar, 2012



from the description you are giving .... every thing works except Throttle, Even on simulator ....

the easiest problem would be...
1. loose wire connector to throttle stick gimbal
2. Throttle Gimbal POT worn out OR wire break

Just open and physically check inside... place inside pics on forum.
Logged
 

Read
« Reply #2 on: February 07, 2016, 01:02:56 AM »
prajulad
Plane Lover
Active Member
**

Reputation Power: 1 
prajulad has no influence.
Offline Offline

City: Hyderabad
State: Andhra Pradesh
RC Skills: Beginner
Posts: 14
Join Date: Mar, 2014



Hi,
Thanks for the response. Opened up the radio and checked the throttle wiring connections with multimeter ( Thanks to another forum member for his guidance!). All seems ok. Will upload pics of radio interior ..

cheers
Logged
 

Read
« Reply #3 on: February 07, 2016, 08:58:59 AM »
prabal276
Avgeek!
Plane Lover
Forum Hero

*****

Reputation Power: 14 
prabal276 has no influence.
Offline Offline

City: New delhi
State: Delhi
RC Skills: Intermediate
Posts: 1393
Join Date: Mar, 2013

Сумасшедший об авиации



Why is this in the for sale section?
Logged

To-be IndiGo Cadet Pilot!
Going on to fly the A320 with IndiGo airlines soon enough!
Mad about planes. All kinds, all sizes, all shapes and all makes!
 

Read
« Reply #4 on: February 07, 2016, 09:26:15 AM »
sahilkit
DEEP SEA DIVING RABBITS
Plane Lover
Forum Hero

*****

Reputation Power: 17 
sahilkit has no influence.
Offline Offline

City: Hyderabad
State: Andhra Pradesh
RC Skills: Beginner
Posts: 1440
Join Date: Mar, 2009

SANWA SD-10G & HITEC Flash 7



you checked both resistance and continuity of individual wires ?

Sahil
Logged

The greatest barrier to success is the fear of failure

HORROR MYSTERY WORLD HISTORY THE HOOVER DAM

Read What You Want, Just Read Responsibly.

Today might be a great and wonderful day. It depends on you.
 

Read
« Reply #5 on: February 07, 2016, 09:28:57 AM »
prajulad
Plane Lover
Active Member
**

Reputation Power: 1 
prajulad has no influence.
Offline Offline

City: Hyderabad
State: Andhra Pradesh
RC Skills: Beginner
Posts: 14
Join Date: Mar, 2014



Yes I did with the multimeter. They are working fine. I tried once again with ClearView simulator yestarday and it did work but only for a minute or so and then no response again. Not sure whats the problem.
Will resetting to factory settings help?

regards
Praveen
Logged
 

Read
« Reply #6 on: February 07, 2016, 09:36:21 AM »
santhosh-r
Plane Lover
Forum Hero

*****

Reputation Power: 7 
santhosh-r has no influence.
Offline Offline

City: coimbatore
State: Tamil Nadu
RC Skills: Intermediate
Posts: 596
Join Date: Dec, 2012



Intermittently working throttle leads to suspect the throttle POT. The traces of POT might have worn out. You can buy spare Throttle POT from horizonhobby
Logged

Spektrum DX6i | Phoenix V4 | CoroTrainer | Tamiya Baja king 2WD | RCTimer F450 Quadcopter
 

Read
« Reply #7 on: February 07, 2016, 09:38:31 AM »
sahilkit
DEEP SEA DIVING RABBITS
Plane Lover
Forum Hero

*****

Reputation Power: 17 
sahilkit has no influence.
Offline Offline

City: Hyderabad
State: Andhra Pradesh
RC Skills: Beginner
Posts: 1440
Join Date: Mar, 2009

SANWA SD-10G & HITEC Flash 7



do check for any dry solder joints or retouch the joints to see if it helps. Try the resetting thing. Check if you model is under any sort of recall by the company or its software bug needing update.

Sahil
Logged

The greatest barrier to success is the fear of failure

HORROR MYSTERY WORLD HISTORY THE HOOVER DAM

Read What You Want, Just Read Responsibly.

Today might be a great and wonderful day. It depends on you.
 

Read
« Reply #8 on: February 07, 2016, 09:40:22 AM »
sahilkit
DEEP SEA DIVING RABBITS
Plane Lover
Forum Hero

*****

Reputation Power: 17 
sahilkit has no influence.
Offline Offline

City: Hyderabad
State: Andhra Pradesh
RC Skills: Beginner
Posts: 1440
Join Date: Mar, 2009

SANWA SD-10G & HITEC Flash 7



Intermittently working throttle leads to suspect the throttle POT. The traces of POT might have worn out. You can buy spare Throttle POT from horizonhobby

if that's case connect the multi meter to pot and move throttle stick to show any indications of open circuit.
Logged

The greatest barrier to success is the fear of failure

HORROR MYSTERY WORLD HISTORY THE HOOVER DAM

Read What You Want, Just Read Responsibly.

Today might be a great and wonderful day. It depends on you.
 

Read
« Reply #9 on: February 07, 2016, 11:16:38 AM »
prajulad
Plane Lover
Active Member
**

Reputation Power: 1 
prajulad has no influence.
Offline Offline

City: Hyderabad
State: Andhra Pradesh
RC Skills: Beginner
Posts: 14
Join Date: Mar, 2014



thanks for all the responses folks. Appreciate it. Unfortunately the situation remains the same. Maybe I need to replace the throttle pot itself. Not sure what i did but it worked for a minute or so yesterday on the simulator but its back to square one now.
Logged
 

Read
« Reply #10 on: February 07, 2016, 02:09:52 PM »
rastsaurabh
Plane Lover
Forum Hero

*****

Reputation Power: 19 
rastsaurabh has no influence.
Offline Offline

City: Noida
State: Haryana
RC Skills: Intermediate
Posts: 1553
Join Date: Mar, 2012



Before anything...... Take pic of pot connection desolder it and just connect to another pot and check if it works......
Usually pots don't get worn out that easily.......

There is loose connection since it did work for a minute
Logged
 

Read
« Reply #11 on: February 16, 2016, 02:17:41 AM »
Hellyflyer
Heli Lover
Forum Hero

*****

Reputation Power: 16 
Hellyflyer has no influence.
Offline Offline

City: New Delhi
State: Delhi
RC Skills: Advanced
Posts: 1258
Join Date: Oct, 2009

Heli=Diff parts flying together in close formation



check in the monitor screen of DX7 to see if it's the pot or anything else. As you have only tried it on a sim it can be a cable fault too.

So check in the monitor to see if you see the dot moving in the screen when you move the throttle stick also test with different models, this will help confirm that the problem is hardware related.

Then you can test the pot with the steps mentioned above.

Logged

Helis and Quads ROCK !!
Subscribe to My youTube Channel - http://www.youtube.com/user/avohrarocks
 

Pages: [1]   Go Up
Jump to:  

Related Topics
Subject Started by Replies Views Last post
throttle not working
Electric Planes
maveric 4 2096 Last post July 30, 2014, 05:10:34 PM
by maveric
Wanted fully working Spektrum DX8 8-channel Tx
Wanted
NewHobbyMR 0 586 Last post September 12, 2015, 08:13:42 PM
by NewHobbyMR
Throttle stick centering mechanism for Futaba 9CAP
Wanted
AshokP 2 848 Last post September 16, 2015, 04:06:54 PM
by AshokP
MOVED: Throttle stick not working Spektrum DX7
For Sale
prajulad 0 538 Last post February 07, 2016, 09:08:38 AM
by prajulad
Throttle pot not working , and pitch and yaw is not reaching its min max value
Radios and Receivers
Asfakmhmd 17 3391 Last post April 08, 2018, 06:25:43 PM
by Raviraj