I have a Onyx Studio that doesn't power on. No components look visually damaged. I noticed that BT_3.3V was only at ~3.0v, after some measuring around, I found that L600 had ~3.3v coming in but only ~3.0v going out. I bypassed it for testing with a small jumper, now BT_3.3V measures at ~3.275v, but the speaker still doesn't work. Battery is fully charged at almost exactly 4.2v. I tried removing C306 but it didn't seem to change anything. Any other ideas where to look?
Plugging the USB port into my laptop and running `lsusb` doesn't show the speaker, not sure if this info helps.
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Re: Harman/Kardon Onyx Bluetooth Speaker - No Power
Hi AGENT24!
I have an ONYX STUDIO 4. I plugged my scooter charger into it. The charger IC is burnt out. That's all it looks like visually. I would like to fix it. Unfortunately, I can't find a plan for it anywhere. Could you help me? I can't find a service manual link either.
Thanks in advanceLeave a comment:
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Re: Harman/Kardon Onyx Bluetooth Speaker - No Power
Hello everyone
I have the same Onyx Studio that does not turn on.
The BC57E687C Bluetooth chip gets warm after 1 minute with the AC adapter connected.
I hope youcan help me please.Leave a comment:
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Re: Harman/Kardon Onyx Bluetooth Speaker - No Power
Finally . I modding power charging battery by LM7805 and everything is OK . But charging battery near 8 hours when battery is very low,can't to start system :P . I'm no care because I alway using power apdater,sometime i go out to use on battery . Thank a lot
Attached FilesLast edited by svipmt; 11-04-2017, 08:56 AM.Leave a comment:
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Re: Harman/Kardon Onyx Bluetooth Speaker - No Power
I no find replace U701 IC . You can help me new solution ? . I plan to mod a extend power stepdown module for charging batteryLeave a comment:
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Re: Harman/Kardon Onyx Bluetooth Speaker - No Power
U701 is probably faulty, or C706 shorted?Leave a comment:
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Re: Harman/Kardon Onyx Bluetooth Speaker - No Power
I removed C306 and turned on ok but not charging battery . I connect apdator and remove battery and check Vbat pin is 0VLeave a comment:
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Re: Harman/Kardon Onyx Bluetooth Speaker - No Power
Are you getting 4.7v from the new U700?Leave a comment:
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Re: Harman/Kardon Onyx Bluetooth Speaker - No Power
I'm bad english . I have onyx studio no power . I checked board see D300 explosive and U700 short circuit . I have replace new D300,U700 and still not work ? Anybody help me fix this ? thankLeave a comment:
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Re: Harman/Kardon Onyx Bluetooth Speaker - No Power
Harman/Kardon Onyx schematic diagramLeave a comment:
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Re: Harman/Kardon Onyx Bluetooth Speaker - No Power
Well, more likely one of those 4 caps is shorted out or the IC itself. I would carefully remove hose caps one at a time to see if the shorts will go away.Leave a comment:
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Re: Harman/Kardon Onyx Bluetooth Speaker - No Power
https://www.badcaps.net/forum/attach...8&d=1490813608
Check the RESISTANCE between the two legs of C713 (the smallest cap of the four caps) to see what it shows. Make sure to report if the reading is in Ohm, K Ohm, or M Ohm.
BTW, that black carbon on the board should be removed, it is conductive.Last edited by budm; 03-29-2017, 01:29 PM.Leave a comment:
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Re: Harman/Kardon Onyx Bluetooth Speaker - No Power
So those 4 caps connected in parallel to the output side (which feed pin 2 input pin of the IC) of L701 are all OK and not shorted?
I wish you will show the pictures of the board after clean up.
You need to verify if there are any shorted circuit before even trying to locate the replacement inductor.Leave a comment:
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Re: Harman/Kardon Onyx Bluetooth Speaker - No Power
Unfortunately I don't know what value or properties it has.Leave a comment:
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Re: Harman/Kardon Onyx Bluetooth Speaker - No Power
how to identify this inductor to replace it with new?
соuld you send specific information about this part?
thanks.Leave a comment:
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Re: Harman/Kardon Onyx Bluetooth Speaker - No Power
The burnt component is L701. It's an inductor, not a capacitor. See photos posted earlier in the thread.Leave a comment:
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Cant find what smd code Y0DVA.
sitting in Harman kardon onyx studio 7. Appreciate any help. -
Working on an early 2000s dell / harman kardon computer speakers.
Suddenly only the right speaker works. No sound is coming out of the left. Also, the right is much louder than when both speakers were working. The minimum volume setting sounds much louder than where I previously set it (half way). And the loudness difference between minimum and maximum position on the knob is small compared to when both were working.
I checked the signal wire for continuity from the board to the jack. Both channels and the ground are continuous with low resistance and not shorted... -
The charging indicator light on my ASUS X54H laptop is always on even when the charger is disconnected.
Windows also shows ''Plugged in'' when charger is not connected.
This problem started year ago gradually, when unplugging the charger the charging light took several seconds to disappear, then minutes, and now almost always on even when unplugged for an entire day.
Strangely, before sometimes immediately when plugging in the charger the charging light went away, and later came back with it connected.
If I let battery run out and say it has 3% Windows will... -
Hi
Long story short, Harman Kardon Aura Studio 2 speaker, no power.
Disassembled, found burned IC, maybe the 5V regulator? not sure
No schematics
IC marking: 225S2 (see pic)
Board ref: 40-KS320U-PSK2G
Thanks for any help!... -
Laptop Question
Hello,
I'm working on a Lenovo T460 that has been having trouble charging as of late. Its worked well since I've owned it for a few years. When I went to use it the other day it was dead and wouldn't turn on (was sitting on an Anker 65W GaN charger). After some fiddling with the charger I got it to turn on and start charging, but seemed like the charger was not working as it should (took a few plug and unplug cycles to get it to start charging).
A day later it was dead again and wouldn't boot/charge no matter what I did. No lights or anything when...
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