TI DLP 3010 EVM not powering on

Manoj Gopalakrishnan38

Other Parts Discussed in Thread: TPS62260

Hi,

I received a DLP 3010 EVM. When I powered on the EVM the projector is not turning on. D15 (SYSPWR) led is “ON" but D16(PWRNON) led is “OFF” even after I turned on the SW1 switch. Could someone advise how to resolve this issue?

Regards,

Manoj

over 10 years ago

0 Frank Xu over 10 years ago

TI__Intellectual 2200 points

Hi Manoj,

Sorry to hear that. Are you using power adapter INPUT: 100-240V, 50-60Hz, 0.5A. Output: + 5V, 3.0A?

Without flip SW1 switch, you should see D15 and D16 LEDs lit immediately.

If you use the correct power adapter and still cannot turn on the projector, please consider to send the unit back and exchange for another one.

Thanks.

Frank Xu

0 Andy Hsu over 10 years ago in reply to Frank Xu

Prodigy 170 points

Hello Frank,
My EVM have the same problem, only D15 LED is on, D16 is off. The power adapter is +5V,3A output. Is there any way I can check? Thank you very much.

0 Nadine Estermann over 10 years ago in reply to Andy Hsu

TI__Genius 10495 points

Hello User,

Can you please measure the voltage on U17 pin 5? This is the 3.3V voltage regulator which is connected to D16.

Thank you,

Nadine

0 Andy Hsu over 10 years ago in reply to Nadine Estermann

Prodigy 170 points

Hi Nadine,

Many thanks for your support.

I checked U17 TPS62260 VIN(pin 1) is 4.8V but SW(pin 5) is 0.8V, and I've measured the power on current from adapter is 390mA(main board only).

Andy

0 Nadine Estermann over 10 years ago in reply to Andy Hsu

TI__Genius 10495 points

Hello Andy,

Can you please measure pin 5 on U12 and U1 ? U12 should put out 1.8V and U1 should put out 1.2V. I would like to see if the other supplies are still working.

It might be that only U17 is damaged.

Thank you,

Nadine

0 Andy Hsu over 10 years ago in reply to Nadine Estermann

Prodigy 170 points

Hello Nadine,

The pin 5 on U12 is 1.8V and pin 5 U1 is 1.2V. Touched by finger, U17 is a little hot, U12 and U1 are well.

Thanks,

Andy

0 Nadine Estermann over 10 years ago in reply to Andy Hsu

TI__Genius 10495 points

Hello Andy,

I might be that only U17 is damaged. Do you have a way to replace this part ? If not, TI has a 90 days return policy. Have you purchased this EVM less than 90 days ago ?

Thank you,

Nadine

0 Andy Hsu over 10 years ago in reply to Nadine Estermann

Prodigy 170 points

Hello Nadine,

It's less than 90 days, but I still need one. I think I can replace it first if TI can send me a new part.

Thanks very much for your support.

Andy

0 Nadine Estermann over 10 years ago in reply to Andy Hsu

TI__Genius 10495 points

Hello Andy,

Can you please measure one more thing before we change parts ? Can you please verify the correct values for the R48 and R47 ? I attached a screenshot of the schematic.

Can you also please measure if pin5 of U17 as a connection to GND ?

Thanks,

Nadine

0 Andy Hsu over 10 years ago in reply to Nadine Estermann

Prodigy 170 points

Hello Nadine,
R48 is not 78.7K and R47 is not 360K, it might be that resistors are connected to the circuit. Pin5 of U17 is as connection to GND, but not short to GND. The reisitor between pin5 and GND is about 1 OHM.
Thanks,
Andy

0 Nadine Estermann over 10 years ago in reply to Andy Hsu

TI__Genius 10495 points

Hello Andy,

1 Ohm is a little bit low. I measure on a good EVM 10kOhm.

If you really want you can try to change U17 but I would recommend to send the EVM back and we will replace it.

You can request a sample for this part see following link: https://store.ti.com/TPS62260DDCT-225MHz-600mA-Step-Down-Converter-in-2x2mm-SONTSOT23-Package-P17277.aspx

Thanks,

Nadine

0 Andy Hsu over 10 years ago in reply to Nadine Estermann

Prodigy 170 points

Hello Nadine,

I've tried to remove U17 and C51 but the resistor from U17 pin 5 to GND is still low.

I think that send it back for checking will be better. Could I have the address and contact window to do that?

Thanks very much.

Andy

0 Nadine Estermann over 10 years ago in reply to Nadine Estermann

TI__Genius 10495 points

Hello Andy,

You should have received with your EVM an information page. You need to contact our Product Information Center. The phone number for your country is listed on the back of the information page.

Please let me know if you ran into any issues. Thanks.

Best regards,

Nadine

0 Andy Hsu over 10 years ago in reply to Nadine Estermann

Prodigy 170 points

Hello Nadine,
I will contact local service center first, Thanks very much for your support.
Best Regards,
Andy

0 Andy Hsu over 9 years ago in reply to Andy Hsu

Prodigy 170 points

Hello, my EVM device doesn't work well recently, while turn on the power switch, sometimes it can be power on, and sometimes can't. And sometimes it will turn off itself while it was powered in several minutes. The LED power chip is a little hot, it seems shut down itself when system is hot. Is there any way that we can check for that, thank you very much.

0 Nadine Estermann over 9 years ago in reply to Andy Hsu

TI__Genius 10495 points

Hello Andy,

I am sorry to hear that. Have you done any modifications to your EVM?

Can you please check the DMD voltages VBIAS, VRST and VOFS ?

Thanks,

Nadine

0 Andy Hsu over 9 years ago in reply to Nadine Estermann

Prodigy 170 points

Hello Nadine,

Thanks very much for your support. No any modification.

The VBIAS=17.96V, VOFS=9.98V, VRST=-14.06V, is that ok?

BTW, sometimes, switch on, the L2 is quite hot then the system auto shut down, but the L2 is ok when the system power on successfully.

Thanks,

Andy

0 Nadine Estermann over 9 years ago in reply to Andy Hsu

TI__Genius 10495 points

Hello Andy,

Did you measure VBIAS, VRST and VOFS in case the projector turned on ? Can you please check the value of VLED and if you have any shorts between the cathode and anode of the LEDs ?

In case it doesn't turn on is the LED D5 ON ?

Best regards,

Nadine

0 Andy Hsu over 9 years ago in reply to Nadine Estermann

Prodigy 170 points

Hello Nadine,

Thanks,

Yes, the value of VBIAS, VRST and VOFS are measured while the projector normally turned on.

The EVM is not modified, and the projector usually can be turned on without problem, so I think the connection of LEDs should be ok.

If the projector can't be turned on, the L2 was hot with bad smell, but this situation is not too much, I don't remember the LED D5 is on or off.

It usually can be turned on at this moment, maybe I report it again if any further problem.

Best Regards,

Andy

0 Nadine Estermann over 9 years ago in reply to Andy Hsu

TI__Genius 10495 points

Hello Andy,

Thank you.

Perhaps it was only a issue with the connection.

Please let me know if you have any further questions.

Best regards,
Nadine

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TI DLP 3010 EVM not powering on