Tip & How-To about iRobot Mirra 530

Power Supply Issues: Your Troubleshooting Guide

If the power supply shuts off unexpectedly or doesn't turn on at all, try the following steps:

  1. Check that the power supply is connected to a grounded, 3 conductor socket.
  2. Check to see if the outlet has power, by plugging another device that works in another outlet.
  3. Check the power supply cord to ensure it's not damaged.
  4. Place the power supply (transformer) at least 3.6 meters / 11.8 feet from the pool and at least 12 cm / 4 Inch above the surface (fig.1). The transformer will supply low voltage to the cleaner
  5. Uncoil the cable (fig.2)
  6. Place the unit in the water. Turn the unit side to side in the water to allow air to escape from the body and then let the cleaner sink to the bottom of the pool (fig.3). Allow wheels to soak for 15 minutes before using Mirra for the first time of the season.
  7. Then, spread the cable over the surface of the pool as evenly as possible (fig.1).
  8. Plug the cable into the power supply. Make sure the key on the plug corresponds exactly with the key slot on the socket of the power supply (fig. 4a)
  9. Plug the power supply into a grounded outlet. (fig. 4b)
  10. Press the CLEAN button and the light will glow indicating that the system is "ON." The pool cleaner should start the cleaning cycle (fig. 5). Turn the power supply on and off a few times, leaving 45 seconds in between each action, if the pool doesn't start cleaning.
  11. If problem still continues, please contact customer service or your local repair center for further assistance.




Information acquired from iRobot Support

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1 Answer

Magnavox 42mf438b won't turn on


Hello!!!

That problem is 2 causes,its either power supply or system board.
This are some D.I.Y procedure for troubleshooting.

  1. Open the back cover by removing all screws at the back.
  2. Try to look at the power supply board and find the leak/bulge on top capacitors.If you found,replace it with the same type and ratings.
  3. If the power supply doesn't have any leak capacitors.Try to power it ON to perform voltage checking.
  4. Check the output voltage of power supply such as 5vdc,12vdc and 24vdc by using voltmeter.If this 3 supplies having a voltage drop or flickering voltage while on power ON.Check the following parts on the power supply,change value/open resistor,shorted transistor and diode or repeat step # 2.
  5. When the output voltage is stable and all parts looks OK.The problem could be on system board.Unfortunately the system board or main board is not for D.I.Y because the parts inside is very logic and very sensitive.That is replaceable.
Please don't forget to testify and rate my answer if it helps you..Thank you for using fixya..

Jul 12, 2011 | Televison & Video

2 Answers

the LED in my motherboard is on, but if i turn on the switch, their is no response. the power connection is correct. but it doesn't work


Try swapping the power button connection with the reset button connection. Then to turn on your computer you will need to press the reset button. If that works you have a faulty power button. Otherwise try using a different PSU. One that you know works. If that doesn't help the motherboard will have to be replaced.

Jun 18, 2011 | ASUS P5VD2-VM SE - Motherboard - micro ATX...

1 Answer

I turned tv on and 5 mins later it just went out, now it won't turn on at all


Hi,

That problem is 2 causes,its either power supply or system board.
This are some D.I.Y procedure for troubleshooting.

  1. Open the back cover by removing all screws at the back.
  2. Try to look at the power supply board and find the leak/bulge on top capacitors.If you found,replace it with the same type and ratings.
  3. If the power supply doesn't have any leak capacitors.Try to power it ON to perform voltage checking.
  4. Check the output voltage of power supply such as 5vdc,12vdc and 24vdc by using voltmeter.If this 3 supplies having a voltage drop or flickering voltage while on power ON.Check the following parts on the power supply,change value/open resistor,shorted transistor and diode or repeat step # 2.
  5. When the output voltage is stable and all parts looks OK.The problem could be on system board.Unfortunately the system board or main board is not for D.I.Y because the parts inside is very logic and very sensitive.That is replaceable.

Thank you and good luck.

Jun 04, 2011 | Olevia 332V LCD TV

1 Answer

Having trouble turning my Tv on,have to turn it on and off/plug and unplug for a while to get pic and sound.Can you help?


Good day!

The problem of your TV could be the power supply.

Please follow this steps on how to fix that problem
:

  1. Remove the back cover of your TV.
  2. Try to look at the power supply board (it usually directly connected to the power cord)
  3. Plug-in your TV and power it ON to perform a voltage data.
  4. Check the input voltage of the power supply.It should have 110vac or 220vac it depends the input voltage of your TV that comes on the outlet.Use multimeter tester (range in AC)
  5. If the input voltage of the power supply doesn't have a reading,the power cord is defective you need to replace it.
  6. If the input of the power supply have 110vac or 220vac.Please check the output voltage of the power supply using your multimeter tester (range in DC).Normally it should have 5vdc for the system board,12vdc for the audio system and 24vdc for the inverter board (back-light).Also look for the leak/bulged on the top capacitor.If any replace it with the same type,ratings and value.
  7. If the you have done all procedures above and you have found any defects and the output voltage are complete.The problem could be the the system board or main board of your TV.This is not for D.I.Y because the parts are surface mount and its very sensitive.If the problem is main board you have to replaced it,buy a new main board its available at the market.
  8. When the output voltage of the power supply doesn't have reading,please check the following
  • Fuse---look if it is busted
  • Power transistor----If it is shorted (range in diode test)
  • Resistor----If it is open or change value (range in ohms)
If you found any defective parts replaced it with the same type,ratings and value.


I hope this solution will be helpful.Thank you and good luck.
Don't forget to rate my answer thank you.

May 09, 2011 | Televison & Video

1 Answer

My Sharp LCD panel color TV. does not have any power supply. When I turn on the power button, its power indicator led from red to green for split second and completely turn off without any life. What could be the probable problem. Thanks


Good day!

This are the steps to find and fix that problem.


  1. Open the cover of your TV.
  2. Disconnect the input supply of system board or main board that comes from the power supply unit.
  3. Power ON the TV to check the voltage reading of disconnected connector to the input of system board by using voltmeter.
  4. Check the 5vdc and 12vdc by using voltmeter.If you got voltage reading of 5vdc and 12vdc,try to connect the input connector of the system board and check the voltage again.If no voltage when you connect it.There's a shorted parts on your system board.Replace the whole system board because its very difficult and expensive to repair it.
  5. When the input voltage of system board doesn't have 5vdc and 12vdc even disconnected on the board.The problem is on power supply.
Check the following:
  • Fuse-Check the fuse if busted.
  • Transistor and diode-Check the transistor and diode if shorted.
  • Resistor-Check the resistor if open/change value.
  • Capacitor-Check the capacitor if leak/bulge on top.
If you found the defective parts that mention above.Replace it with the same type and ratings.
NOTE:If the following parts are OK and the problem is still there.The power supply have major problem and its not for D.I.Y..

Thank you and good luck

Apr 25, 2011 | Sharp AQUOS LC-32D43U 32 in. LCD...

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