⟐ Answer edited June 26, 2026 at 19:04 MST

⟐ Commented June 23, 2026 at 19:08 MST

Context:

My robot hasn't hit the year mark and yet he doth betray me with the Lidar error. I tried spinning the lidar with a cotton swab a few (15) times (it turns just fine), cleaning the area with a toothpick and vacuum, moving it, soft resetting it, hard resetting it and now I'm at a loss.

I followed this guide initially, but unfortunately it doesn't get me all the way to the turret motor in my model: https://www.reddit.com/r/Roborock/commen...

I have tried YouTube, google and am a hair's breadth away setting fire to my poor tool kit.

Any help or advice would be really appreciated.

⟐ Answer accepted June 23, 2026 at 13:40 MST

⟐ Answered June 22, 2026 at 1:51 MST

recently the main brush motor stopped spinning so i opened it up to replace the motor. i have now bought 3 different replacement motors that say they are for the T8 or 8x. but none of them fit correctly. i have searched like crazy but can not for the life of my find my motor anywhere online. (pictures below) am i crazy? are these no longer in production? is one of the other motors supposed to fit even though the L shape is wrong? your wisdom is appreciated.

ok so with some inspiration from oldturkey03 i think im close. im going to walk through what i did if anyone else is ballzie enough to try this.

so i decided i was going to transfer the old L drive shaft to the new motor. i started by unclipping the snaps around the perimeter (picture1).

once inside i cleaned all the gears as they were very full of dirty grease (picture2).

i then removed the two screws on the left side of the image (picture3) (this is where the motor attaches) and screwed in the new motor.

but as i put it back together i realized that the gear attached to the new motor was beveled to the left but all the old gears were beveled to the right! so i pried the motor gear off of the old motor and transferred it to the new one. (be careful when prying off it toke a lot of force and mine ended up half way across the room in my white shag carpet. much cussing ensued.)

ive got all the pieces together and clean now i guess the last thing i need is to figure out what kind of lubricant to use on the gears. any ideas?

⟐ Edited by author June 18, 2026 at 16:20 MST

Turned out it stopped working a while ago.

When I got it back I started to diagnose it.

The first thing I noticed was, when it's docked in the charginstation, it turns on and I can adopt it into the smart things app. The battery read 0% and no matter how long it charges it wouldn't go up.

So I started by disassembling the battery down to its individual cells. Turned out 5 out if 6 cells were completely dead (absolute 0 volts).

So I ordered some new cells and put the battery back together. The battery now shows 21,7 volts. But it still doesn't want to run outside the chargingstation.

When I use a multimeter on the battery, while it's connected to the chargingstation it shows about 25 volts on d+ to d- (the plugs from the vacuum to the PCB on the battery). And still 21,7 volts on b+ to b- (the spot welded tin to the battery). It has now charged for about 2 hours and it's still about 37% charged (so not getting charged).

I've tried to put the PCB under an thermal camera to see if anything gets hot, but it doesn't. Even with it plugged into the chargingstation, without the chargingstation or it disconnected from the robot. I've also tried to connect 21 volts 1 a with a powersupply connected both on d+ to d- and on b+ to b-, yet nothing gets hot.

Anyone have any idea on how I could fix this?

I'm pretty new to this stuff, but I do watch some youtubers like NorthridgeFix and TronicFix so I have some general idea.

Should I disconnect the cells again and maybe try injecting voltage over some of the chips on the PCB or check the resistance on some of the caps? If so i would love some guidence. I don't have a chip programmer yet, but I will order one sooner or later, if needed.

Image of the PCB here:

https://imgur.com/a/eqJpynu

I'm also working on a guide on the disassembly of the batter here (ask and ill add you in order to view):

Disassembling Samsung Vacuum Battery VCA-RBT80 VR30T80313W/WA

⟐ Commented June 16, 2026 at 3:16 MST

⟐ Marked as duplicate June 25, 2026 at 17:49 MST

I have cleaned all parts

⟐ Marked as duplicate June 25, 2026 at 17:49 MST

Anyone have pinout connector main brush motor box of irobot roomba 5xx/6xx?

⟐ Commented June 09, 2026 at 9:08 MST

⟐ Commented June 09, 2026 at 4:07 MST

I have problem with my pure i9.

I got e23 and e21 error codes and i bought new batteries to fix it. Its still showing same error codes, when i put it on charging station.

Sometimes it shows red battery icon, sometimes white, but error codes stays same.

I have cleaned charcing stations two metal pads and also pads beneath the vacuum. Pads are shiny clean and dont have any corrosion or dirt.

I have also cleaned the hole vacuum with bottled air, so vacuum is clean from dust and dirt.

Internet forums dont have anymore solutions to fix my vacuum. Some forums are telling that this pure i9-model usually get eletronic fault and it cant be fixed...

Can someone please save my vacuum from dumpster?

BR

Tinke

⟐ Answered May 20, 2026 at 18:02 MST

Some things I have tried:

Cleaned both waste water and clean water tank thoroughly

Small pipe cleaner run through of all water lines to verify no obstructions

Thorough cleaning and maintenance of vacuum robot

This close to tearing the base station apart and doing a thorough cleaning.... when the wife isn't looking🫣

⟐ Answered May 16, 2026 at 20:23 MST

⟐ Answered May 12, 2026 at 8:01 MST

⟐ Commented May 08, 2026 at 2:23 MST

⟐ Commented April 27, 2026 at 22:07 MST