Roomba Power Supply conversion

Convert 5xx PS from 110VAC to 220-240VAC

How did I convert iRobot Roomba 5xx power supply from 110VAC to 220VAC / 240VAC mains?
How did I make a US / American iRobot Roomba 5xx power supply to work in European countries?
How did I mod (modify) iRobot Roomba 5xx power supply from 110VAC to 220-240VAC?

I didn’t want to buy/use a voltage converter for this power supply and since I have some basic electronics knowledge and soldering skills, I moded this power supply.

Please note that there are few PCB models for the same power supply,
this page relates ONLY to the PCB model shown in the following images which is of iRobot model #: 17062

DISCLAIMER - Important!

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iRobot Roomba Power Supply conversion image 1

Image of iRobot 5xx series power supply

iRobot Roomba Power Supply conversion image 2

Bottom view of power supply after bumpers & screws removal

iRobot Roomba Power Supply conversion image 3

Image of iRobot 5xx series power supply – bottom sticker

In order to mod this power supply, you’ll need to:
A. Disassemble the PCB from the housing.

iRobot Roomba Power Supply conversion image 4

Image of iRobot 5xx series power supply – open view with top cover removed

B. Replace 3 components in the PCB plus mains plug if needed:

Needed components:

1. Electrolytic capacitor 47µF 400V (marked C1 on PCB)
Note: Take extra care to capacitor polarity when you place it

2. Varistor 14D361K , VMax=360 Imax=6000 (marked RV1 on PCB)
Note: After replacement, it is advised to add a shrink to avoid damage in case of blow

3. Time Delay fuse 1.6A 250V (marked F1 on PCB)

4. Mains Plug
For safer and secure operation, cut the US plug and add a mains plug according to the standard used in your country.
The US supplied wire comes without earth wire so you don’t need to worry of it.

iRobot Roomba Power Supply conversion image 5

Image of iRobot Roomba 5xx power supply – after the mod

C. Assemble the PCB to the housing, make sure the Green led is in place relative to the top cover.

D. Voila – you now have a working 220-240VAC iRobot Roomba power supply.

Have fun and enjoy your Roomba, Avi

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