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Re: Speaker Amplifiers replacement and new power supply succ
I have not had the sub-woofer disassembled, only the front speakers. Did the old amp board have a cross over?
Re: Speaker Amplifiers replacement and new power supply succ
The speaker/ s on my Roku radio are noisy too. Is this something a radio repair shop should be able to handle or is it more specialised ? I am in the UK.
Re: Speaker Amplifiers replacement and new power supply succ
grahalex wrote:The speaker/ s on my Roku radio are noisy too. Is this something a radio repair shop should be able to handle or is it more specialised ? I am in the UK.
It's probably beyond the average repair shop because the amplifier boards (which is the likely cause of the noise) are really hard to find/replace with alternatives.
You might have luck with the UK based guy in this thread: http://forums.roku.com/viewtopic.php?t=24597 - he seems to had some happy customers on this forum.
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- jm_maclaren
- Posts: 329
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Re: Speaker Amplifiers replacement and new power supply succ
Picked up a used R1000 from ebay. Didn't power on, but following suggestions here I connected amps and display/cpu to a 3A 12V power supply. Front let speaker fine, front right crackled and popped no sound, sub sounds distorted. I opened it up and established front right bad by swapping left and right channels and trying one at a time. If I plug in headphones all s good except sub still plays. I know others have experienced this and tried alternate amps. Any thoughts on this
Sure Electronics AA-AB32231 2x8W at 4 Ohm TPA3110 Class-D Audio Amplifier Board from parts express
(http://www.parts-express.com/sure-elect ... d--320-329). or maybe
Sure Electronics AA-AB32155 2x15W at 4 Ohm TA2024 Class-D Audio Amplifier Board Only
http://www.parts-express.com/sure-elect ... y--320-330
Thanks
James
Sure Electronics AA-AB32231 2x8W at 4 Ohm TPA3110 Class-D Audio Amplifier Board from parts express
(http://www.parts-express.com/sure-elect ... d--320-329). or maybe
Sure Electronics AA-AB32155 2x15W at 4 Ohm TA2024 Class-D Audio Amplifier Board Only
http://www.parts-express.com/sure-elect ... y--320-330
Thanks
James
Re: Speaker Amplifiers replacement and new power supply succ
James,
what I think from my experience:
1. Front speaker: This sounds like glue problem that has become conductive. Take tooth pickers and remove carefully ALL of that yellowish glue from the small amp board especially at the cable solded side and at the side where the small single wire is solded (the amp board is inside the front speaker housing).
2. Distorted sub: I suppose sub speaker itself is faulty, the magnet has been losen. You can try this by removing the speaker and move slightly the membrane with your finger in and out. When doing this normally no mechanical sound can be heard. If you hear a "scratching" sound like metal on metal or paper on metal the speaker is dead and you need a replacement.
Regards
Dirk
what I think from my experience:
1. Front speaker: This sounds like glue problem that has become conductive. Take tooth pickers and remove carefully ALL of that yellowish glue from the small amp board especially at the cable solded side and at the side where the small single wire is solded (the amp board is inside the front speaker housing).
2. Distorted sub: I suppose sub speaker itself is faulty, the magnet has been losen. You can try this by removing the speaker and move slightly the membrane with your finger in and out. When doing this normally no mechanical sound can be heard. If you hear a "scratching" sound like metal on metal or paper on metal the speaker is dead and you need a replacement.
Regards
Dirk
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- jm_maclaren
- Posts: 329
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Re: Speaker Amplifiers replacement and new power supply success!
Ive been looking at my r1000, disconnected the subwoofer amp which I believe is broken. I measure voltages on the audio (brown black) wires and got 7V (radio powered with a 19V flattop suplty and 9V regulated to the display). Yellow and white are 19V and 0V. red and blue seem to be as
https://forums.roku.com/viewtopic.php?f ... e8#p442822
The dc reading on the black seems odd to me. I have a replacement amp
http://www.ebay.com/itm/201439878578?_t ... EBIDX%3AIT
based on the same chip
I'm nervous connecting an audio input with a dc for fear of frying it. Does this dc reading seem bad to folks?
Thanks
https://forums.roku.com/viewtopic.php?f ... e8#p442822
The dc reading on the black seems odd to me. I have a replacement amp
http://www.ebay.com/itm/201439878578?_t ... EBIDX%3AIT
based on the same chip
I'm nervous connecting an audio input with a dc for fear of frying it. Does this dc reading seem bad to folks?
Thanks
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- jm_maclaren
- Posts: 329
- Joined:
Re: Speaker Amplifiers replacement and new power supply success!
nevermind... circuit had capacitors on the input and it worked fine
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- Jordan2Lesnar
- Posts: 6
- Joined:
- Location: New york
- Contact:
Re: Speaker Amplifiers replacement and new power supply succ
jm_maclaren wrote:Picked up a used R1000 from ebay. Didn't power on, but following suggestions here I connected amps and display/cpu to a 3A 12V power supply. Front let speaker fine, front right crackled and popped no sound, sub sounds distorted. I opened it up and established front right bad by swapping left and right channels and trying one at a time. If I plug in headphones all s good except sub still plays. I know others have experienced this and tried alternate amps. Any thoughts on this
Sure Electronics AA-AB32231 2x8W at 4 Ohm TPA3110 Class-D Audio Integrated Amplifier Board from parts express
(http://www.parts-express.com/sure-elect ... d--320-329). or maybe
Sure Electronics AA-AB32155 2x15W at 4 Ohm TA2024 Class-D Audio Amplifier Board Only
http://www.parts-express.com/sure-elect ... y--320-330
Thanks
James
The speaker/ s on my Roku radio is noisy too. Is this something a radio repair shop should be able to handle or is it more specialized? [font=-apple-system, Helvetica Neue, Helvetica, sans-serif]Did the old amp board have a cross over?[/font]
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