vic7767 wrote:It may be time to measure the battery voltage after a full charge and then if the voltage is between 16 and 17 volts perform a load test on it. How old is this battery ?
Luciano, please state whether you elect to not use a Home Base, or not use it because the 520 has no Home Base and no HB's electrical contacts on the robot.bolero1000 wrote:... I simply unplugged the roomba from the charger (I don't use the base), ...
Gordon wrote:Luciano, please state whether you elect to not use a Home Base, or not use it because the 520 has no Home Base and no HB's electrical contacts on the robot.
Gordon wrote:BTW, I'm glad to see your 520 has corrected itself, but be sure to say something if it reverts to its error state.
Thanks for that. Perhaps the "520" is the USA-530 bundled with a 240VAC-mains capable charging-PSU!bolero1000 wrote:Hi Gordon,I simply don't use the base, but I've it & the 520 (at least the European one) have the contacts.Gordon wrote:Luciano, please state whether you elect to not use a Home Base, or not use it because the 520 has no Home Base and no HB's electrical contacts on the robot.
No, it is suffering a failure. After reading your OP, I gave this a lot of thought, and did some tracing of the charging current path on a loose 510-PWB, but could not get enough of the circuit diagram in front of me to be certain about my thoughts.I found a way to "replicate" it (perhaps...), if I unplug the charger during the charging (flashing orange), the roomba continue to flash orange also unplugged for 30sec-1min .. perhaps it's done on purpouse (stays in charge "control" mode) to handle possible power problems (spikes or other) ??Gordon wrote:BTW, I'm glad to see your 520 has corrected itself, but be sure to say something if it reverts to its error state.
I can only parrot what the manual says, and it is this:... ... someone could clarify me, for the selftest in MANUAL-ADVANCE MODE, how do you understand if a test passed or not ?? I thought it was when Clean become green but not so sure now ...
Service Manual wrote:MANUAL-ADVANCE MODE
This is designed to be used for debugging particular sensors or actuators. In this mode, the robot
DOES NOT decide PASS/FAIL for each test number.
Gordon wrote:No, it is suffering a failure.bolero1000 wrote:I found a way to "replicate" it (perhaps...), if I unplug the charger during the charging (flashing orange), the roomba continue to flash orange also unplugged for 30sec-1min .. perhaps it's done on purpouse (stays in charge "control" mode) to handle possible power problems (spikes or other) ??
Gordon wrote:As a test, you might try setting up the Home Base for charging and let the 520 charge from that source. See how well that works.
vic7767 wrote:The only way to determine a Pass/Fail in manual mode is to monitor the test results via the SCI port.
Yes, when the documentation mentions a visual way to determine Pass/Fail then use the results that are mentioned. What I attempted to explain is that on the tests that have no Pass/Fail indicator you could use the output of the test in ASCII via the SCI port.bolero1000 wrote:Just to make an example, the simple test 2 for bumpers, Tester Action "Press and release left bumper. Press and release right bumper.", if the Spot & Dock LED goes on (& the Clean goes green) could I says that test's passed or not ?
NO. I did no active testing, only analysis by examining a spare circuit board.bolero1000 wrote:...Do you mean that you tried to unplug the charger while roomba is charging (flashing orange) & it not flashing orange (unplugged, for 30sec-1min) ??
Gordon wrote:NO. I did no active testing, only analysis by examining a spare circuit board.
Gordon wrote: If so, the main board has a charging system fault, and it is not likely that you will be able to fix it -- other than by replacing the (alleged) failed board.
I ran my 535 on carpet for about half an hour, and then set it to direct charging. After waiting about 10 minutes, I unplugged the dc power and noticed that the Clean-button LEDs went dark within a second or two, and stayed dark until I resumed charging. About 30 minutes later, I repeated the charging interrupt, and the LEDs again went dark very quickly.bolero1000 wrote:...It'll be interesting, at least for me, if someone could try on his 5xx to unplug while's charging & confirm if the Clean goes off (or continue to flash orange) ...
Gordon wrote:I ran my 535 on carpet for about half an hour, and then set it to direct charging. After waiting about 10 minutes, I unplugged the dc power and noticed that the Clean-button LEDs went dark within a second or two, and stayed dark until I resumed charging. About 30 minutes later, I repeated the charging interrupt, and the LEDs again went dark very quickly.bolero1000 wrote:...It'll be interesting, at least for me, if someone could try on his 5xx to unplug while's charging & confirm if the Clean goes off (or continue to flash orange) ...
Basically the same as bolero1000 experienced.rangatanga wrote:One of my Roombas 560 starts to behave very strange - ... .
None have been posted, as yet. I have been studying the fault as time permits. I think the self-powering occurs as I described in the referent thread, but have no clue how the circuit may be designed to overcome such a built in fault, or why all 500-Roomba owners don't experience the problem.Any suggestion where to find the culprit?
I can suggest measurements that will confirm how battery power flows in a reverse direction through the charging FETs to then power the robot, but resulting data will only confirm that flow, rather than lead to a correction.What voltages to measure to identify the malfunctionig part?
Michal, I think that may become useful data as we learn more about this problem, but can't see what to make of it at this time.another rekmark - when MB is connected to regulated PS it works within range 12-14 Volts. When the voltage exceeds roughly 14,5 Volts, the charging light starts to blink. Thats why it blinks with battery connected since charged battery voltage is more then 15 Volts.
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