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750c Display Documentation

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  • paxtana
    replied
    That's interesting Petal, did you give it a try with batt disconnected?

    Leave a comment:


  • Petal
    replied
    Originally posted by ykick View Post

    I have a recently dead 750C laying around. Opened it up and checked out the MS621FE button battery. It’s supposed to be 3V lithium rechargeable but only measuring 1.1V.

    Picture speaks 1000 words - Click image for larger version Name:	image1.JPG Views:	1 Size:	555.9 KB ID:	39901


    Since the display is dead to me I’m not sure if this battery is supposed to have any charge applied as installed in the 750C when connected to a battery pack?

    It seems to be a dutch guy named Frost_Aizmof have the solution!
    https://gathering.tweakers.net/forum...63753#52463753

    Frost_Aizmof post summarized:
    Set auto shutdown off, (otherwise the 750c will auto shutdown :) ) and leave your screen on for several hours, it seems to be that the RTC battery will take charge.

    After 5 hours of continues screen on, the display seems to be remember the correct time!

    ps. I did not removed my 48v battery yet..

    Leave a comment:


  • paxtana
    replied
    A bench tested bbsxx unit will always work like that Tinkersmiths. It pretty much needs a load to noticeably vary speed.

    Leave a comment:


  • thedadude
    commented on 's reply
    FWIW this is a silly, silly, most annoying and by the way...did I mention...a really silly problem to have for a computer in this day and age. How could they not have designed the clock to retain time at least off a small capacitor, or small replaceable internal battery for the controller....that is at best clumsy design FAILURE. If it can't keep time why have a clock with date settings? Is there an update coming for this or is it a hardwired design failure?

  • thedadude
    commented on 's reply
    I get a red "brake warning" Icon at the middle top of the screen when I apply brakes or shift gears (purchased the shift sensor also). It is a red, "drum brake" style symbol on black background and only stays on momentarily, so may be easy to miss.

  • paxtana
    commented on 's reply
    Exclamation point always comes up when using ebrakes that is normal and unrelated to shutdowns. Please check out the bbshd troubleshooting
    https://electricbike.com/forum/forum...bbshd-or-bbs02

  • Tinkersmiths
    replied
    Hello,
    I just purchased the BBSHD Middrive Kit with a Dolphin 13.xx am your battery, along with the 750c display. I have not yet built the bike but wanted to pretest al the electronics. Everything is hooked up including brake sensors. The 750 screen boots, the throttle spins the motor but the motor only spins at one speed. The throttle does not "vary" the motor speed. I understand not being on a bike means the speed sensor is not getting any magnet ticks. Is there a setting I missed to vary the speed of the motor with the stock thumb throttle this comes with the unit?

    https://lunacycle.com/bafang-bbshd-1000w-middrive-kit/

    Thanks

    Brian

    Leave a comment:


  • Madjag
    replied
    Originally posted by cajk View Post
    Hi,

    On the 750c the "brake applied" symbol is a red "exclamation mark" surrounded by a circle and then enclosed in a pair of round brackets. It appears on the top line of the display, between the clock and the battery indicator.

    Sorta like this: (!) only with a circle around the !

    See this thread for a photo of the same symbol on the DPC-14:

    https://electricbike.com/forum/forum...dpc-14-display

    Hope that helps!
    Howdie eBike gurus,

    I'm the recent owner of Luna Police Bike who posted a melt-down issue a couple of months ago caused by the spaces in the cradle and battery terminals being too far apart/loose, causing excess heat, and melting the plastic around the cradle points and the battery receiver slots. (Sorry for the incorrect terminology) Luna took care of me and the bike is running fine again. I have the 13.5 amp, 1000 watt, Shark bat and the BBSHD motor.

    I watched a YouTube video by the cycle shop "Bike Friday" on how to adjust the Shimano BR-M375 mechanical disc brake that I have. I did a minor adjustment since I didn't want to loosen the entire caliper: I merely adjusted the postion of the mechanical arm by loosening the 5mm bolt and bringing the arm a bit tighter. This seemed to be enough because before the adjustment I couldn't lock the rear brake by pulling hard. Now I can, both tested at about 15 mph on the street.

    https://www.youtube.com/watch?v=vRZIXVWjfZA

    I have only 500 miles on my new bike, however I guess my braking pattern and ride profile has made an adjustment necessary. All seemed well as I took off today to ride 12.5 miles to work. After I turned on the battery and squeezed the rear brake, a little red icon lit up with the exclamation point inside. Same went for the front brake which I never adjusted. When I let off the brakes the light went out.

    I decided to ride anyway and thought that I would research this icon warning light on the forum later. I got about 6 miles into my ride and the battery just stopped and the display turned off. I took the battery off the cradle and put it back on, tired restarting, but the faint "Luna" that floats by showed up quickly and then went black again. When I got home I tested the system with my new battery and it turned on fine. When I squeezed the brake though, the warning icon came on again.

    - What is the warning icon indicating?
    - Does the brake sensor actually have the smarts to shut off the bike if it senses something related to low brakes/broken brakes/brakes too tight?

    I can spin the rear wheel with no apprent rubbing and the flat disk is straight and true.

    Any hlep would be greatly appreciated. Oh, and just to show how I am stretching my knowledge and abilities concerning this bike after having a Bionx for 7 years, I had to remove the Allen (?) fittings on the replacement cradle that Luna sent me and butt splice/heat shrink the cradle wire to the motor wires. First time I've done something like that in the eBike world. It has worked fine since then.

    Thanks,
    Jimbo

    Leave a comment:


  • paxtana
    commented on 's reply
    As I have stated numerous times in this thread it is IMPOSSIBLE to solder in a new battery.

  • slomo85
    replied
    Originally posted by SM300 View Post
    Is there a way to contact someone at Luna to have them test this since they are branding this as a functioning display and it's not functioning. They offered me something like a 25 dollar discount after I told them about this problem, that gauging from reviews on the site they were aware of the problem. I got it for free with a BBSHD purchase but would have gotten their other color display (which now offers 52V capacity readout) since I thought that only could display 48V. I don't feel it's my obligation to potentially break mine and void warranty for this, and it seems like what you all have discovered seems like it may very well fix the issue.

    Thanks.
    I would very much like to know the same thing. I don't want to open this up and solder a new battery in if it will void the warranty either.

    Leave a comment:


  • paxtana
    commented on 's reply
    The clock is not an advertised feature, long time ago we changed the documentation at top of this thread to point out clock doesn't work. If you got a 25 dollar discount to make up for something you got for free that's pretty good. The dpc14 is out of stock and we will not know if it does 52 with new batch until it arrives.

    There is nothing to test, as I pointed out in my pictures there is nothing to connect a larger battery to not even some metal pins. The original is epoxied directly to the board with pins coming off the batt not the board. None of the proposed batteries here have pins already spot-welded on just bare wires. If you can neither remove original or connect a new one it's not gonna happen, just check your phone if you want to see what time it is

  • SM300
    replied
    Is there a way to contact someone at Luna to have them test this since they are branding this as a functioning display and it's not functioning. They offered me something like a 25 dollar discount after I told them about this problem, that gauging from reviews on the site they were aware of the problem. I got it for free with a BBSHD purchase but would have gotten their other color display (which now offers 52V capacity readout) since I thought that only could display 48V. I don't feel it's my obligation to potentially break mine and void warranty for this, and it seems like what you all have discovered seems like it may very well fix the issue.

    Thanks.

    Leave a comment:


  • ykick
    commented on 's reply
    Unfortunately, I don't have a working 750C to attempt.

  • ElectricCoolaide
    replied
    Bump, anyone try replacing this yet? I really like the display, this would be a nice issue to have so easily fixed.

    Leave a comment:


  • SM300
    replied
    Okay well patiently waits for someone to change the battery and see if it fixes everything.

    Leave a comment:

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