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HelicopterRadio - JR DMSS › JR X9503 radio glitch caused $3,000 bird to crash!
08-12-2010 11:11 PM  7 years agoPost 1
OneHoof

rrApprentice

Cold Spring, Kentucky

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Pray that you never see the "back lit, flat line, screen of death" on your X9503 when you are flying your bird... because it is the same as turning your radio off and your bird is about to crash!!!

In the hospital... "flat line" means you are dead, ie. no heart beat... with the X9503... it means your bird is dead! *wink*

On Tuesday, August 10th, 2010, my JR X9503 radio had a major glitch and blanked out while I was hovering my Vario Benzin Acrobatic. My helicopter was in a rock solid 3 foot hover when suddenly it quit responding to my control inputs. The radio beeped and the back lit screen lit up, the display went blank... with only a solid line across the lit screen, like when turning the radio off.

I was hovering my $3,000 Vario Benzin Acrobatic in a solid 3 foot hover when this happened. From that point the controls where unresponsive. It was just like the radio had been turned off. The helicopter climbed to 40 feet circled and crashed in a field causing devastating damage to the rc helicopter.

The battery was at 9.8 volts charge and there was no reason for the radio to fail. I attempted to flip several switches to save the helicopter and get the radio to start responding to no avail. After the crash... the radio would not turn off, it was locked into the blank, back lit screen with the flat line... I had to take the battery out to get it to turn off. The next day when I put the battery back in the radio worked normally and showed 9.8 volts. Have you ever seen or heard of a problem like this before?

Obviously I am very upset and hoping JR/Horizon Hobby is willing to repair or replace the radio and help offset the cost of rebuilding or replacing my crashed helicopter. Has anyone else ever had a radio failure/glitch like this before? Do you think Horizon Hobby will do right by me and fix the radio and replace/repair my crashed helicopter? Any tips or advice?

Lone Wolf

This is what the screen looked like when the radio stopped responding and the helicopter flew itself for 30 seconds before its catastrophic crash.

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08-12-2010 11:15 PM  7 years agoPost 2
cdrking

rrElite Veteran

Seattle

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9.8 volts seems a bit low to me.

Sorry for the loss.

Jeff

To hover is divine, the alternative is rather PLANE.

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08-12-2010 11:16 PM  7 years agoPost 3
OneHoof

rrApprentice

Cold Spring, Kentucky

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But still above half charge... I've been told this was still plenty to fly.

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08-12-2010 11:22 PM  7 years agoPost 4
OneHoof

rrApprentice

Cold Spring, Kentucky

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I was doing a test flight with a new servo... getting it dialed in to heading hold. Had probably flown about an hour with no issues with the radio. Then suddenly when in a 3 foot hover... the radio quit working... and locked out in blank screen... sending helicopter to an early death.

These are the results of the JR X9503 radio failure and subsequent crash:

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08-12-2010 11:48 PM  7 years agoPost 5
cdrking

rrElite Veteran

Seattle

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When does the low voltage alarm come on with this radio?

Jeff

To hover is divine, the alternative is rather PLANE.

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08-13-2010 12:03 AM  7 years agoPost 6
cdrking

rrElite Veteran

Seattle

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Found the manual and it states that the low voltage alarm comes on at 9.0 volts. Personally I have always stopped flying a transmitter at no lower than 9.8 volts. Maybe it was just right on the edge. It's also possible that the volts shown on the screen may not be accurate.

How old is the transmitter pack?

Jeff

To hover is divine, the alternative is rather PLANE.

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08-13-2010 12:08 AM  7 years agoPost 7
Saint728

rrProfessor

Honolulu, Hawaii

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Sorry to hear about your crash. I assume you didn't have your fail-safe settings set? If you did your helicopter would not have flown up 40 feet and crash, it would have cut the throttle and done way less damage at a 3 foot hover. I would send the transmitter and receiver in to Horizon and have them check it out with an explanation as to what happened. I'm sure they will fix or replace the transmitter and or the receiver. As for them fixing your helicopter, I don't think its going to happen.

Take Care,
Cheers, Patrick

Check the hotties in my Gallery
http://rc.runryder.com/helicopter/gallery/9019/?all=photo

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08-13-2010 01:33 AM  7 years agoPost 8
MANCHA

rrVeteran

Cabo San Lucas, Baja- Mexico

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TX battery voltage is 9.6 V.

9.8 volts is more than enough.

You have a different problem.
Have you used a different JR charger or have you fast charged you TX ?

MANCHA

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08-13-2010 02:29 AM  7 years agoPost 9
dkshema

rrMaster

Cedar Rapids, IA

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Run the TX for a while, see if the battery voltage suddenly drops off. You may have one bad cell in the pack whose capacity is way down. Or your battery pack wasn't fully charged to begin with. Letting it sit overnight, the cells will recover somewhat and initially show a higher terminal voltage. Let them run for a bit, however, you'll see what shape they are really in.

Is this the original NiMh battery pack, if so, when was it last charged? Those stock NiMh cells have a horrible self-discharge rate.

Horizon will fix your radio, under warranty, as it's a new radio. Don't expect them, however, to foot any of the bill for you heli rebuild. Consequential damages are not covered by warranties. Everyone WISHES the manufacturer will foot the bill for repair, but it is NOT a common practice.
The helicopter climbed to 40 feet circled and crashed in a field causing devastating damage to the rc helicopter.
Next time you bind your TX to an RX, set your throttle to a reasonable fail-safe setting -- like low throttle. I'd be willing to bet that you didn't set up the fail safe settings when binding the RX.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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08-13-2010 04:35 AM  7 years agoPost 10
jschenck

rrProfessor

La Vista, NE.

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9.8 volts is more than enough.
+1 I fly mine down to 9.7 before charging. The low voltage alarm on the 9303 is 8.8V IIRC. I beleive all the electronics
run lower voltage than that, that's why they buzz a little, the internal voltage regulator running the battery pack down to what ever the internal components actually run on.
After the crash... the radio would not turn off, it was locked into the blank, back lit screen with the flat line... I had to take the battery out to get it to turn off.
that really doesn't sound right. send it in for sure.

Could try cycling the battery pack, discharge it first and see how much is left in it. Then cycle it a few times to see what the charge capacity is. I've been using NiMH in my TX's for years and they've been good to me. I almost always charge with the wall wart charger or if I do use a field charger it's set at a lower rate like 300mah or so.

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08-13-2010 06:02 AM  7 years agoPost 11
koppter

rrApprentice

Virginia

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Lone, as was said, the warranty clearly states that the mfr will not be held responsible for anything beyond the defect in the radio, if there is one. for them to do otherwise would drive the cost of the hobby up 10 times, as you would be paying for everyone else's crash. that your bird was $300 or $3k is not important - guys have watched $20k jets turn into confetti over electronic failures...and that's just part of the hobby. i dumped my 700 last week when a servo went full over all by itself and all i could do was watch it come down and go boom. fix it and move on...

PM sent to Big Wolf...don't want to hijack the thread on the servo brand.

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08-13-2010 06:08 AM  7 years agoPost 12
bigwolf1

rrVeteran

USA

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koppter

Was that a align DS610 servo that did that on your 700.. I had one do the same thing not long ago on the elevator.

MAH blade Rep
Trex700LE
Magnum fuels

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08-13-2010 10:05 PM  7 years agoPost 13
9387ASH

rrElite Veteran

UK

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Sounds very much like you had a power interruption on the transmitter.

9.8V is PLENTY to operate on, I would suspect the fuse holder/fuse possibly being loose.

Open the rear case and check the fuseholder, wiring from the rear case pcb to the processor pcb.

If that is okay, then it could be a dodgy power switch, turn the set on and move the switch slightly sideways, try putting some pressure downwards.

Ultimately, you MUST send it back to HH as the blank screen on power up is NOT a good sign, check all you model memories for signs of strange looking squiggles etc. You set could lock out completely and then it would need to have a new processor pcb fitted.

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08-13-2010 11:50 PM  7 years agoPost 14
Saint728

rrProfessor

Honolulu, Hawaii

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Whatever you do, do not open up the transmitter and or receiver it will void your warranty.

Take Care,
Cheers, Patrick

Check the hotties in my Gallery
http://rc.runryder.com/helicopter/gallery/9019/?all=photo

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08-14-2010 01:14 AM  7 years agoPost 15
9387ASH

rrElite Veteran

UK

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Bollocks.... how the hell do you change the tension on the stick springs ?? Or change a fuse ??

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08-14-2010 01:42 AM  7 years agoPost 16
Wayne Parrish

rrVeteran

Apex,NC,USA

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If it voids the warranty,why would JR tell you how to change the tension on the sticks in the manual,AND,when they had the wire across the gimbal they told you how to fix it yourself if you'd like. NO,I don't think you opening the back will void the warranty . JR is pretty easy to get along with.

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08-14-2010 11:17 PM  7 years agoPost 17
sewerfly

rrApprentice

el cajon CA USA

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Your Bird looks like a total loss

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08-15-2010 12:14 AM  7 years agoPost 18
Saint728

rrProfessor

Honolulu, Hawaii

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I use to own a hobby shop in Australia. Our JR importer told us not to have our customers open their electronics, just to send it back and have it repaired or replaced. By a customer opening it up and trying to fix it themselves will void their warranty. All importers said the same thing, weather it was from JR, Futaba, Align, OS motors, Castle Creations, etc. Maybe its different here in the States, but I wouldn't try to fix something just incase it does void the warranty.

Check the hotties in my Gallery
http://rc.runryder.com/helicopter/gallery/9019/?all=photo

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08-15-2010 01:55 AM  7 years agoPost 19
Wayne Parrish

rrVeteran

Apex,NC,USA

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If it was so,why would they give you instructions on how to change the tension on the sticks ? I have a link to page 16 of the 9503 manual and the 9303 is the same. Like I said before ,they also gave you the option of moving some wiring around that could have been hit by the gimbals.READ THE MANUAL !!

http://www.horizonhobby.com/ProdInf...2930-manual.pdf

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08-15-2010 03:16 AM  7 years agoPost 20
Thumpernator

rrKey Veteran

Senoia, Georgia, USA

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If it was so,why would they give you instructions on how to change the tension on the sticks ? I have a link to page 16 of the 9503 manual and the 9303 is the same. Like I said before ,they also gave you the option of moving some wiring around that could have been hit by the gimbals.READ THE MANUAL !!
Not only that, but you can also change the antenna without voiding the warranty. Just did that on my 9303. BTW, the new antenna came with excellent instructions.

Dave
I keep on thinking, but nothing's happening. Knuk, Knuk, Knuk

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HelicopterRadio - JR DMSS › JR X9503 radio glitch caused $3,000 bird to crash!
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