Comments on: Trying to Repair Roomba Scheduler

By: jon

jon — Sat, 20 Aug 2011 15:56:21 +0000

if any one knows what to do email me at follettjon@yahoo.com

By: jon

jon — Sat, 20 Aug 2011 15:55:37 +0000

all my roamba scheduler irobot does the red light wont quick blinking

By: Daveyon

Daveyon — Fri, 16 Jul 2010 10:42:48 +0000

Nice tut. But with my customer’s Roomba 560, the LED itself is damaged. Now if only I could get a replacement LED without purchasing a set of Cliff Sensors. Anyone know what type are these LEDs?

By: Brad Gilbert

Brad Gilbert — Wed, 31 Dec 2008 21:21:22 +0000

Keith, try looking for zero ohm resistors. They will often use them for fuses, they will be the little components labeled 000.

By: Keith Neufeld

Keith Neufeld — Wed, 31 Dec 2008 18:57:58 +0000

Francisco, I assume you’ve already corrected the polarity of the cable and it still doesn’t work . . .

Have you opened it up to look at the PC board that it feeds into? Often the shorted/damaged components will be obviously scorched, broken, etc.

If they’re not obvious, have you traced from where the power signal enters the board? On the Roomba I gave up because it enters in the middle and the board was so complex; but if you’re lucky, power will enter the board at an edge and you’ll be able to see what it hits first.

It’s a little hard for me to guess what failed. My recollection with polarized capacitors is that when they fail, then tend to fail open (not shorted); so if you reversed polarity and damaged a filtering capacitor, the circuit should still work, just with less power supply filtering. But that doesn’t seem to be the case.

Do you have any digital pictures of the circuit that you could post online somewhere?

By: Francisco Moraes

Francisco Moraes — Wed, 31 Dec 2008 18:24:50 +0000

Hi,

On the repair topic, I have an exercise bike that I damaged while trying to fix its power adapter. I ended up inverting the polarity of the cables when I fixed it and now the circuit no longer works.

Any suggestions on where to start looking for damaged components? I mean, electrolytic capacitors, etc… that would be most likely to damaged and may be cause of the problems?