control board troubleshooting

[Toy]

1.Check your PSU.

Disconnect the PSU with the board, check the voltage of between "+V" and "com" pins of PSU with a multimeter, for GT2560 and GTM32 pro, it should be 12V, for GTM32, it should be 24V.
Connect the PSU with the board, check the voltage of between "+V" and "com" pins of PSU.

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If the disconnecting voltage is normal and the connecting voltage is too low or just 0V, then it means the PSU has a bad load capacity to carry the board.

You can adjust the potentiometer to adjust the voltage input.

Note that you need to choose the right 110V/220V according to the standard in your country.

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2. Check the board power.

If board power is on, the lower left LED lights will light up too.
For GT2560, board power usually is 12v.

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For GTM32, board powerr is 24V.

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3. Check the fuse.

You can measure the voltage of the two sides of the fuse, if there is a big difference then the fuse is dead.
For GT2560,

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For GTM32,

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4.Check the power for meanchip.

For GT2560, the voltage of the meanchip is 5V.

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For GTM32, the voltage of the meanchip is 3.3V. If the meanchip powered, the LED 3.3V, 5V will be on.

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[DQW]

This might be a dumb question.

But do I put the PSU ON and connected to the electricity? When testing with multimeter.

[Cup]

@DQW
Yep,should be on.

[DQW]

@DQW
Yep,should be on.

Ok I tested de PSU while connected to the net but not to the board. 0V on all the volt setting (didn't really know which setting to set to measure)
Then I plugged the Board on it and still 0V on all setting.

So I turned the potentiometer and tested again, 0V, turned it the other way around and also 0v??
What to do now? Re-measure?


Another question arises, how is it possible that my old PSU Got the same thing as my new?

Still need to measure the board but I need a 12volt PSU to measure it

[Cup]

0V on all the volt setting (didn't really know which setting to set to measure)

AC input(between "L" and "GND"),DC output(between "+" and "COM").

[DQW]

0V on all the volt setting (didn't really know which setting to set to measure)

AC input(between "L" and "GND"),DC output(between "+" and "COM").

+ and COM of both give me zero with or without the board attached.

L & GND give me fluctuating -0.1 to 0.37 on the multimeter V --

EDIT!!!

L & GND on the V~ gives me 135 ? Shouldn't this have to be 220 (Europe - Belgium) - The pin is set on 220V~

How can I fix this. I'm pretty sure my old one isn't broken as well, and nothing has changed to the PSU but still it doesn't work

[Cup]

0V on all the volt setting (didn't really know which setting to set to measure)

AC input(between "L" and "GND"),DC output(between "+" and "COM").

+ and COM of both give me zero with or without the board attached.

L & GND give me fluctuating -0.1 to 0.37 on the multimeter V --

EDIT!!!

L & GND on the V~ gives me 135 ? Shouldn't this have to be 220 (Europe - Belgium) - The pin is set on 220V~

How can I fix this. I'm pretty sure my old one isn't broken as well, and nothing has changed to the PSU but still it doesn't work

Did you measure the voltage of N&Gnd?What is it(should be zero)?
If it is not,there may be something wrong with you wiring.
Rewire the cables on your PSU(L&N&GND) including the cables on powerswitch of your printer.