How To, 50A BBSHD Controller Mod

General Discussion about electric bicycles.
User avatar
fechter
100 GW
100 GW
Posts: 11822
Joined: Dec 31, 2006 3:23 pm
Location: California Bay Area, USA

Re: How To, 50A BBSHD Controller Mod

Post by fechter » Dec 06, 2017 9:39 pm

Nice to see the insides. Thanks for posting the picture.

I can't make out the numbers on the chips very well.

What's this one?
BBSHD display board.jpg
BBSHD display board.jpg (148.17 KiB) Viewed 101 times
"One test is worth a thousand opinions"

E-mil
1 mW
1 mW
Posts: 16
Joined: Apr 23, 2010 7:55 pm

Re: How To, 50A BBSHD Controller Mod

Post by E-mil » Dec 07, 2017 6:31 pm

I knew you'd gonna ask about that chip, which definitely looks a buck converter.
Unfortunately I don't have a better or clearer image, not even the original hi-res pic enhances it.

And I'm not going to open it up again now. 😛

User avatar
tomjasz
1.21 GW
1.21 GW
Posts: 3553
Joined: Mar 29, 2014 1:45 pm
Location: Out riding, MN USA
Contact:

Re: How To, 50A BBSHD Controller Mod

Post by tomjasz » Dec 07, 2017 10:52 pm

E-mil wrote:
Dec 06, 2017 6:00 pm
Well, here's to the rescue, Fechter:

I can detail how to safely break it apart if you wish.. I rubber-glued it together, and it's without problems since.

Please?
Thanks Justin_le we're here thanks to you. All the best to the mods for their tireless work keeping it on an even keel.

User avatar
fechter
100 GW
100 GW
Posts: 11822
Joined: Dec 31, 2006 3:23 pm
Location: California Bay Area, USA

Re: How To, 50A BBSHD Controller Mod

Post by fechter » Dec 08, 2017 12:05 am

Which model of display is that?
"One test is worth a thousand opinions"

E-mil
1 mW
1 mW
Posts: 16
Joined: Apr 23, 2010 7:55 pm

Re: How To, 50A BBSHD Controller Mod

Post by E-mil » Dec 08, 2017 9:28 am

The display is the DPC-14 aka C850 .

Here are the pics and description from my memory. Have to say I managed to break a corner of the front glass, but luckily it doesn't affect anything.

Display assembly description:
The display is surrounded by a square removable plastic rim which is held in place with several plastic notches - 3 on the sides, 2 top and bottom. Under this is the edge of the displays' glass, which is not glued but rather sticky tape is used, put between the glass plate and the cabinet's plastic. Important to know is that the flat LCD cable sits in the right side of the display, so you have to be careful not to open this side too wide or cut too deep!

How to open:
The plastic rim is quite easily pried off. Look at the pics for location of latch points.
The difficult part is now the glass. I used a narrow blade/scalpel to carefully work my way around the edges, making sure I didn't press too deep inside. In hindsight it could be a good idea to oil the blade and seal, as the tape tends to stick to the knife. As I found out, the glass is likely made of .. glass. Be careful. Work your way around the edges until it starts to lift.
When glass is lose, open from LEFT side, and dont twist it. Else the flat cable can break.

Inside of the cabinet is the backside of the circuit board visible. It is held in place with some screws IIRC.


Flat cable can be seen inside. Don't open this side any further!
The plastic rim is already removed here. Notice the broke glass corner:
DPC-14 C850-1.jpg
DPC-14 C850-1.jpg (78.65 KiB) Viewed 61 times
Bottom side view:
DPC-14 C850-2.jpg
DPC-14 C850-2.jpg (68.01 KiB) Viewed 61 times
Left bottom side view:
DPC-14 C850-3.jpg
DPC-14 C850-3.jpg (150.12 KiB) Viewed 61 times

User avatar
tomjasz
1.21 GW
1.21 GW
Posts: 3553
Joined: Mar 29, 2014 1:45 pm
Location: Out riding, MN USA
Contact:

Re: How To, 50A BBSHD Controller Mod

Post by tomjasz » Dec 08, 2017 1:13 pm

E-mil wrote:
Dec 08, 2017 9:28 am
The display is the DPC-14 aka C850 .

Here are the pics and description from my memory. Have to say I managed to break a corner of the front glass, but luckily it doesn't affect anything.

Thank you!
Thanks Justin_le we're here thanks to you. All the best to the mods for their tireless work keeping it on an even keel.

Post Reply