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Old 07-02-2020, 11:03 PM   #1
hanswr
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Default RCA Sound Bar RTS7010B not turning on

Hello.

Would you help me find out what is wrong with this RCA RTS7010B sound bar?

It does absolutely nothing when connected to the power supply, no LEDs, completely dead.

I cannot find the schematics online to know if it uses a fuse.

Power adapter is working fine, already tested that, the jack connector works too, not broken or loose.

Thank you very much in advanced.
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Old 07-02-2020, 11:20 PM   #2
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Default Re: RCA Sound Bar RTS7010B not turning on

I would start checking Voltages between the two legs of those electrolytics caps to see what Voltages they have. I would also check the Voltages of IC501.
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Old 07-05-2020, 10:17 PM   #3
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Default Re: RCA Sound Bar RTS7010B not turning on

Quote:
Originally Posted by budm View Post
I would start checking Voltages between the two legs of those electrolytics caps to see what Voltages they have. I would also check the Voltages of IC501.
I apologize for the delay to answer and thank you again for your reply.

I have attached a new image with the readings from every electrolytic capacitor and the IC501.
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Old 07-05-2020, 11:25 PM   #4
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Default Re: RCA Sound Bar RTS7010B not turning on

So the input DC gets all the way to the regulator IC501. What is the P/N as printed on the body of IC501?
And how about the Voltage on that big black cap?

Last edited by budm; 07-05-2020 at 11:27 PM..
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Old 07-05-2020, 11:47 PM   #5
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Default Re: RCA Sound Bar RTS7010B not turning on

Quote:
Originally Posted by budm View Post
So the input DC gets all the way to the regulator IC501. What is the P/N as printed on the body of IC501?
And how about the Voltage on that big black cap?
IC printed information

AMS1117-ADJ
H1518


The big black cap reading is 12.7v
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Old 07-06-2020, 12:55 AM   #6
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Default Re: RCA Sound Bar RTS7010B not turning on

Quote:
Originally Posted by hanswr View Post
IC printed information

AMS1117-ADJ
H1518


The big black cap reading is 12.7v
That AMS1117 Adjustable LDO is bad, the Voltage drops between pin 1 (ADJ) and the pin 2 (Out) should be 1.25V which is the internal Vref, right now per your measurement it has 6.8V - 4.2V = 2.6V so that is bad, I expect the out put to be 5V.
You can also study about LDO regulator here: https://www.badcaps.net/forum/showth...999#post300999
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Last edited by budm; 07-06-2020 at 01:32 AM..
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Old 07-06-2020, 04:09 PM   #7
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Default Re: RCA Sound Bar RTS7010B not turning on

Quote:
Originally Posted by budm View Post
That AMS1117 Adjustable LDO is bad, the Voltage drops between pin 1 (ADJ) and the pin 2 (Out) should be 1.25V which is the internal Vref, right now per your measurement it has 6.8V - 4.2V = 2.6V so that is bad, I expect the out put to be 5V.
You can also study about LDO regulator here: https://www.badcaps.net/forum/showth...999#post300999
Thank you budm for always providing a helpful hand.

I will check that information, do some further testing and come back if I have any positive results or questions.
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Old 07-06-2020, 06:57 PM   #8
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Default Re: RCA Sound Bar RTS7010B not turning on

At this point you should replace the regulator to get the correct Voltage back first then go from there, hopefully that the 6.8V output did not damage the circuit.
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Old 07-12-2020, 10:21 PM   #9
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Default Re: RCA Sound Bar RTS7010B not turning on

So any follow-up on this?
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