[Keeto]

Hi guys,

I have chipped over 50 cars with this Scaley chip before, as I like the built in light board. What I'm about to described has never happened before.

I chipped the car as usual...as soon as I put the chassis on the track to test, it flew of like crazy and crashed.

OK. So I reset the PB. Put car back on. Zoooms off. OK. Rewire everything. Still zooooms off. Check braids, check wiring again, check track, basically check everything that I can think of. Still zoooms off!

Put on a different car just to make sure it's not the track....car runs fine, no problems.

Get another chip, install that. No problems.

Anyone experienced that before? Anyone got an idea what is causing this?

Thanks.

 

[MrFlippant]

Yep. Bad chip. It's acting as a bridge rectifier and turning that AC into full DC as if you put it on an analog track with full throttle.
You could send it to gmyers for a repair/upgrade, assuming it's just bad diodes or mosfets.
You could also send it back to Hornby and ask for a replacement, explaining just what you did above.

 

[Ade]

hi
definately a duff chip im afraid,i would send it back to hornby service and they should replace it for you..

 

[Keeto]

Lovely...thanks guys

, Emailed Hornby Customer Service, lets see what happens....

So roughly that is a 50:1 ratio for the C7006....much better than the pre G Revsion DPR...

 

[Keeto]

This must be an ex Friday the 13th thing....I was racing my GTR-500 happily along tonight and then it suddenly just stopped....

Once again did all the checks etc....raced another car no problems....just to make sure, raced a different car all together....no probs.

Opened up the GTR-500....and lo and behold the N02 Mosfet had the smallest of "marks" on it

....now please correct me if I'm wrong, somewhere on the forum I read that that specific Mosfet controls the motor?

This mark is sooo small I mean you REALLY have to look well to see it...on closer inspection it looks more like a hole.....what is going on?????

 

[hankscorpio]

are you running at more than 13.8 volts on a C7030? if so thats ya problem...

 

[Keeto]

Thanks Sean....I am. I usually run it at 15V. It's a PB-Pro with SH...usually quite a few LC's etc but this current track only has 2. I'm only racing by myself most of the time. Guess I should have turned it down a bit.

But it's quite peculiar as I have been racing it at 15V for some time with no issues till this weekend....

Friday night the first car I chipped, the chip didn't work out of the box (as seen in the previous posts)...last night this one just died...and I don't believe in all this mumbo-jumbo superstitions.... Guess I've just been lucky up until now!

Must be, because my rugby team won for a change yesterday!

Their luck turned for the better and mine for the worst.

 

[Ade]

hi
the rated output wich is stamped on all the digital gubbins by scaley says 16v max.I have and do run at varying voltages from 11v-15v depending on motor type.

LMP cars are always run at 15v and i have never blown a chip in nearly 5 years or had a lc section pack up.It may be worth taking a voltage reading at the rails to see whats actually there.

If you dial in 15v at the psu you should see a reading of about 13.8 at the rails as the pb itself draws just over a volt.

 

[hankscorpio]

Its not like every chip will fry at 15v...

Some cars are heavier and some have more mag force than others which adds strain to the motor... hence pulling more amps...

some motors are just naughty and pull more amps than they should through wear or bad manufacture...

The more cars you run at a time and the more XLC's etc etc that are in the track the more of the Amps will be sucked away.... placing less strain on the chips...

Running no mag will reduce risk to chips at 15v... its the "borderline" figure for running with magnets...

Small circuit, solo running, high voltages with magnets..... could be a "perfect storm".... Assuming thats a Carrera GTR-500 (lovely car) it says in the blurb "Car partly equipped with patented Variable Magnet System (VMS) Supplied with magnet units included" Not seen this mag setup in the flesh but could just be that its compounded the problem... Plus new cars have "tight" bearings and "noisy" motors straight from the box after a few minutes of running in and a bit of grease these issues reduce.... you were probably a bit unlucky... 13.8v proven always safe.... ENSCA runs that as a fixed voltage... Never had a problem.... Was recommended by RichG to for the club to run at that level when he did the PB for us.

 

[Ade]

hi
agree with all sean but if you set psu at 13.8v you will only see 12.6 ish at the rails.So even running 15v from psu means a very safe 13.8v at the rails.....

That is what is read from my own track and the findings were backed up by rich when i asked about what the pb was drawing for itself....

 

[hankscorpio]

100% in agreement ade... What gets to the rails is not the PSU "voltage"...

15v "input voltage" is the maximum i would recommend anybody run with for the long term helath of the car chips... But at 15v a bad motor, big magnet, accidental bad stall and its more likely that a chip will fail than at 13.8v...

 

[Ade]

hi

 

[Keeto]

Thanks guys!

I got the post that RichG put on here were he sooped up a C7006, so I'm going to try and revive this chip with that method and in the process reprogram it with Ian's code, all the bits ordered, if you want I can report back on how it went?

 

[Keeto]

QUOTE (Keeto @ 14 May 2011, 10:07) <{POST_SNAPBACK}>Lovely...thanks guys

, Emailed Hornby Customer Service, lets see what happens....

Got my new chip in the post this morning....thanks Hornby.

 

[Keeto]

Hmmmmmm.....new one for me tonight.... Just chipped a Carrera GT3 Porsche....

Put the car on the track....pull the trigger, nothing happens for about 0.5 second...then the car speeds off for the same amount of time I kept the trigger in...did this a few times to confirm...Sooooo, if I keep it in for 1 second, the car sits for 0.5 second, then speeds off for 1 second....some clear delay there for some reason....

Other cars are working 100% on the same track....any ideas guys? Or is this "phone Hornby and get a new chip"?

Again.

 

[Keeto]

Fixed it. Replaced with another C7006 and this one is working fine....seems it's me and Hornby again.

 

[Keeto]

You know, us lot complain a lot about Scalex/Hornby but their customer services support is really quite good. My 2 new C7006 just arrived.

You have to give credit where it's due.

Thanks Hornby....but will you start listening to us about especially new digital track bits please?????