Boston Acoustics Audio Players & Recorders - Recent Questions, Troubleshooting & Support

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Zd 3 diode value on boston acoustic soundware xs 5.1 subwoofer

Replaced the ZD3 on the Boston Acoustics Soundware xs 5.1 subwoofer with a 18 Volt-1 Watt Zener part number 1n4746a. and works like brand new.
1/27/2022 3:05:06 PM • Boston Acoustics... • Answered on Jan 27, 2022
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Recepter Radio HD does not work

8-21-2021 FM reception across the band was degrading in sensitivity over time & now barely gets 2 very strong stations . I'm an Electrical Engineer radio designer. I intuited that the tuner's frequency synthesized oscillator could be corrupted / unstable causing a noise that degrades sensitivity. Today I confirmed that the oscillator is indeed unstable from digital noise in the synthesis mechanism. worse at the 88 mhz end than the 108 mhz end. This typical action for a synthesizer. Hope when open it up a simple degraded resisitor or capacitor component in the synthesizer will reveal irtself. Elsewhere someone reported contaminant on the PCB which is also a likely cause of degredation. Perhaps a leaky back-up memory AA battery dripped "acid" on the PCB and just needs to be cleaned ? jerry at jdm labs98498a37-21ab-4fa2-8149-f5469fdaca18.jpgdscf1041-czevabvc1n20cixjnvmmdozv-6-2.jpg8.22. I measured the the spectrum of the FM tuner's superheterodyne oscillator which should be a single pure frequency . Instead at the 2 ends of the band the spectrum plots show it has multiple frequencies spaced about 40 kiloHertz apart which becomes a 40 kilohertz "noise" interfering with the desired signal . The frequency synthesizer is a Sanyo chip LC72131 and I'm searching for the application schematic diagram of the Recepter ( only owners manual is available) to identify which components may have failed or shifted. Hopefully the chip is ok but need to figure that out too.
12/4/2021 7:23:57 PM • Boston Acoustics... • Answered on Dec 04, 2021
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Boston Acoustics Solo volume knob stopped working altogether. Turning it either way does nothing, no volume number appears. Soft reset doesn't fix it. Any thoughts?

I don't know if you will see this or not, your post was 2 years ago. I have the same problem. My volume is stuck at 24. I have tried soft-reset........among other things. One thread says to turn volume down to 00 then press for 10 seconds. I have no control over the volume, so, yeah, thanks for that fix. I found that I could get the volume down by unplugging it,plugging it back in and sometimes the volume would pop up and I could turn it down one notch. I did it till I got to 00.............thought AHA! My problem is solved! No such luck. When I press the volume at 00 and try to hold it for 10 seconds, after 3-5 seconds it just pops back to the station frequency. I also thought that if I could get into the guts and spray the volume control with tuner-cleaner, it might help. No go.......after taking off the cover, I found a bunch of REALLY delicate looking electrical tapes and wires..........I was scared I would destroy something in an attempt to reach the volume control. I hate to trash this radio, the sound is awesome...............great design on the speaker, NASTY design on the controls. I'd be VERY interested to know if anyone, anywhere, has found a fix for this. I think maybe my next step will be hitting it with a hammer.
10/22/2021 2:01:46 PM • Boston Acoustics... • Answered on Oct 22, 2021
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NOS-95. Why does zener diode ZD3 keep burning out?

You may have to replace the zener with an equivalent having a heftier current rating.
12/12/2020 11:45:34 PM • Boston Acoustics... • Answered on Dec 12, 2020
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Hi i have the Boston acoustics soundware xs 5.1 the sub stopped working the led shines red on stand bye and turns to green when the amp is switched on so i have taken it apart and found ZD3 has blown

ZD stands for zener diode and used for exact voltage regulation. Take out a known good one and go to a repair shop to replace. Make sure that when you re install, the striped (polarity) markings are in the same direction!
7/25/2020 10:16:29 AM • Boston Acoustics... • Answered on Jul 25, 2020
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How can I find the product manual for the Horizon

Here you go buddy:
http://www.abt.com/images/products/PDF_Files/hsolomdnt_use.pdf
7/21/2020 3:08:38 PM • Boston Acoustics... • Answered on Jul 21, 2020
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Install Boston BA7800 Computer Speakers to new Mac Mini

NO HELP BUT Art mac sow great they now everything.
6/8/2020 12:19:10 AM • Boston Acoustics... • Answered on Jun 08, 2020
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Boston acoustics pv-1000 won't power on

Just fixed my PV1000 that would not power on. Verified 185vdc on bulk capacitors. Measured 11vdc on U5 (UC3842) from pin 5 (gnd) to pin 7 (vcc). Then measured 0vdc from pin 5 (gnd) to pin 8 (ref). This should be 5vdc. This means that U5 is shut down for undervoltage. Turned out to be two open resistors. R94 100k 2w and R77 33k 2w. Never would have guessed that as there was no sign of heat discoloration. They are next to each other between U5 the UC3842 PWM IC and Q3. This prevented the proper startup voltage for U5. Replaced them and I'm off and running once again. Hope this helps someone.
1/20/2020 10:52:31 PM • Boston Acoustics... • Answered on Jan 20, 2020
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I lost my adaptor for Boston BA 265 Speaker, 12 V in but What amp

Do not worry about the milliamp.
As long as you use an adapter thats the correct voltage (you stated 12 volts), the end connector fits into the speakers and the polarity is the same, then you wont have any trouble.
12/3/2019 10:37:53 AM • Boston Acoustics... • Answered on Dec 03, 2019
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Boston Acoustics Solo clock radio volume level not immediate

IT SEEMS THAT THERE WAS A BAD CONTACT ON THE VOLUME CONTROL, BETTER DO CLEANING
6/26/2019 10:23:04 PM • Boston Acoustics... • Answered on Jun 26, 2019
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Red status light will not go off or change on Boston A TVee model 2 soundbar.

I am also having the same problem. It was working fine until we moved. Plugged it in at the new house and nothing but a red light. Sub is green though.
6/21/2019 4:56:09 PM • Boston Acoustics... • Answered on Jun 21, 2019
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Seeking Boston Acoustics VR 970 midrange for sale,or best alternative brand?

donaldws1018 I was wondering if the static problem was resolved yet. I have a pair of the VR970's that don't sound so good either.
4/15/2019 8:32:43 PM • Boston Acoustics... • Answered on Apr 15, 2019
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7000684, 7000787, 7000947, 7001364

In DEC 1998 I bought a Gateway PC with a Digital Media Theater, P/N 7000787. In the meantime the speaker in the sub-woofer got damaged (because of age). Is it possible to disassemble the sub-woofer and replace the speaker?
Where can I buy the same or a very similar speaker for this sub-woofer? Thanks, Andy Szekely
2/28/2019 12:55:53 PM • Boston Acoustics... • Answered on Feb 28, 2019
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Volume is locked

thank you soooooo much!!!
it worked :)
11/18/2018 11:14:39 PM • Boston Acoustics... • Answered on Nov 18, 2018
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