<![CDATA[Pint controller repair]]>I took a Pint controller, both boxes and a stock battery but no bms in part trade at $50 value. However, the controller suffered damage from a vnr that shorted out.
Testing the controller revealed a massive short that blew the fuse on my test harness.
Probing with a ohmeter showed a short between a phase connector and ground, so further testing came up with shorted mosfets controlling that phase connector.
I didn't have new mosfets, but I had harvested a few used ones, it was straight forward hot air replacement. I ordered new mosfets now TPH2R608NH
The controller works well now and been patched with Rewheel.
IMG_6701.png IMG_6702.JPG

]]>http://owforum.co.uk/topic/231/pint-controller-repairRSS for NodeTue, 14 Apr 2026 02:33:44 GMTMon, 30 Jan 2023 02:24:37 GMT60<![CDATA[Reply to Pint controller repair on Wed, 30 Jul 2025 16:41:51 GMT]]>@aiden1983 At this point I cannot give you any good advice, just guessing.
Just be aware throwing parts at it may not be cost effective and may cause a massive short that can cause a fire, ask me how I know.
I always plug in the battery outside after a repair.
Maybe look for a working Pint controller circuit board instead. Sorry.

]]>http://owforum.co.uk/post/6839http://owforum.co.uk/post/6839Wed, 30 Jul 2025 16:41:51 GMT<![CDATA[Reply to Pint controller repair on Wed, 30 Jul 2025 15:37:07 GMT]]>@lemur yes I believe so. When I measure the resistance I get approx. 850 ohms from the source to the drain. When the new mosfets are installed the diode mode shows voltage in both directions (source to drain and drain to source). I’m just trying to figure out what else could be blown causing these readings.

]]>http://owforum.co.uk/post/6838http://owforum.co.uk/post/6838Wed, 30 Jul 2025 15:37:07 GMT<![CDATA[Reply to Pint controller repair on Wed, 30 Jul 2025 14:36:42 GMT]]>@aiden1983 Do you mean there's still a short between the source and drain with all the mosfets removed?

]]>http://owforum.co.uk/post/6837http://owforum.co.uk/post/6837Wed, 30 Jul 2025 14:36:42 GMT<![CDATA[Reply to Pint controller repair on Wed, 30 Jul 2025 02:02:54 GMT]]>@lemur thanks for the reply! I removed the mosfets and noticed that on Q2 the source and drain are still short. Do you have an idea what component could be causing the short still? It is only in this location and it doesn’t appear that I have any solder bridges.

]]>http://owforum.co.uk/post/6835http://owforum.co.uk/post/6835Wed, 30 Jul 2025 02:02:54 GMT<![CDATA[Reply to Pint controller repair on Tue, 29 Jul 2025 16:10:44 GMT]]>@aiden1983 Sorry, I got mixed up with another post asking about a Pint bms.
These are the mosfets you need. IMG_E0063[1].JPG

]]>http://owforum.co.uk/post/6834http://owforum.co.uk/post/6834Tue, 29 Jul 2025 16:10:44 GMT<![CDATA[Reply to Pint controller repair on Sat, 26 Jul 2025 22:54:24 GMT]]>@lemur thank you! The pint is slightly different but I was able to see than 4 out of the 6 MOSFET were blown. Took them off my board and no longer have a short. Just need my replacements now :)

]]>http://owforum.co.uk/post/6830http://owforum.co.uk/post/6830Sat, 26 Jul 2025 22:54:24 GMT<![CDATA[Reply to Pint controller repair on Sat, 26 Jul 2025 21:12:41 GMT]]>@aiden1983 Probe the areas red "x" to red "x" and green "x" to green x with a ohm meter set to 200k and there should be no continuity.IMG_0057.jpg

]]>http://owforum.co.uk/post/6827http://owforum.co.uk/post/6827Sat, 26 Jul 2025 21:12:41 GMT<![CDATA[Reply to Pint controller repair on Mon, 21 Jul 2025 23:34:04 GMT]]>@lemur how did you test the MOSFET? Something in my controller is causing a short but I don’t know how to test the MOSFET. Any tips would be awesome!

]]>http://owforum.co.uk/post/6823http://owforum.co.uk/post/6823Mon, 21 Jul 2025 23:34:04 GMT<![CDATA[Reply to Pint controller repair on Fri, 02 Jun 2023 14:58:09 GMT]]>@joeygiamportoneg Use this for removal and install.
https://www.amazon.ca/Digital-Rework-Station-Desoldering-Nozzles/dp/B08GC3HXCM/ref=asc_df_B08GC3HXCM/?tag=googleshopc0c-20&linkCode=df0&hvadid=560465785608&hvpos=&hvnetw=g&hvrand=3115724733706090752&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9001541&hvtargid=pla-969827908942&psc=1

]]>http://owforum.co.uk/post/4645http://owforum.co.uk/post/4645Fri, 02 Jun 2023 14:58:09 GMT<![CDATA[Reply to Pint controller repair on Fri, 02 Jun 2023 04:51:06 GMT]]>I’m fixing the same thing myself, I undid the solder on the same mosfets on the controller but they still won’t come off the board. Is there solder underneath too that needs to be taken off? If not how did you manage to remove the mosfets

]]>http://owforum.co.uk/post/4643http://owforum.co.uk/post/4643Fri, 02 Jun 2023 04:51:06 GMT<![CDATA[Reply to Pint controller repair on Mon, 30 Jan 2023 12:35:42 GMT]]>@lemur Nice work!

]]>http://owforum.co.uk/post/3791http://owforum.co.uk/post/3791Mon, 30 Jan 2023 12:35:42 GMT<![CDATA[Reply to Pint controller repair on Mon, 30 Jan 2023 03:13:57 GMT]]>I really want to do stuff like this

This is actually awesome

]]>http://owforum.co.uk/post/3785http://owforum.co.uk/post/3785Mon, 30 Jan 2023 03:13:57 GMT<![CDATA[Reply to Pint controller repair on Mon, 30 Jan 2023 03:01:32 GMT]]>@lemur amazing work!!!

]]>http://owforum.co.uk/post/3784http://owforum.co.uk/post/3784Mon, 30 Jan 2023 03:01:32 GMT