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Boston Acoustics Duo-i Horizon Clock Radio Questions & Answers
Speaker produces noice/static/buzzing sound when it is off
That means that if too much power is going to the speaker or extraneous signals are being picked up by the wiring, it can come through the speakers as static. Stopping static requires finding and eliminating that extra electricity from transmitting through your speakers.
If you're still hearing distortion, turn down the volume on your amplifier until the distortion goes away. If the volume is too low to be easily heard, the problem may be that your amplifier produces too much power for your speakers to handle or that your amp and speakers have different impedance ratings.
Display light out on boston acoustic duo-I plus
In my case the blue LEDs were dead. It is pretty difficult to replace them by new SMD-LEDs but I managed it. Open the front, take out the board from the front part (5 screws). On one side of the LCD-screen you can see a white stripe with 3 resistors 101 (100 ohms). You must free this stripe form the plastic body on the left and right side (eg. by soldering iron). Solder out this stripe, on the other side you will find 3 very small smd-leds. Break them out and solder 3 new leds onto the board (left side = K). For control you can put 3 Volts to the Anode (A=+) and the Kathode (K=-) of this stripeboard before fixing it on the frontboard by soldering.
How to open boston horizon duo
Remove 2 speaker grills. I use a dental pick for this and the next step. Remove all 8 rubber retainers for the speaker grill posts as there are 8 screws underneath that a #2 Philips screwdriver can be used to remove. Next pull the center volume control knob off and set it aside. Now for the hard part, pull the protective panel which is held on with double-sided tape off of the LCD display. You should now see a single screw which you remove with a #0 Philips screwdriver. The front is now ready to be removed but don't pull too hard as there are many wires that can be damaged if pulled too far. You may need to pry the front off with a straight blade screwdriver. I recommend 4 colors of Sharpie markers to label plugs and ribbon cables as you remove them and some type of support for the front that will not stick to the double-sided tape. I use plastic TV dinner trays for this and also to hold screws and various other parts. Once you separate the speaker wires and all the front board connectors you should be able to lay the front piece containing the speakers and display PCB down on your plastic tray or other non-stick surface to pull the (5) #1 Philips screws out of the display board. Once this is done you can remove the other 2 knobs from the front and you'll see the leaky/cracked memory cap on the front side of the display board. On the amplifier board you'll see the yellow glue that turns brown and becomes a conductor. If you don't believe me stick some multi-meter probes in it and measure the resistance.
Display Panel Light is Out
Bull, the cap is leaking all over the board and has damaged the control microprocessor. Good luck fixing that yourself. No parts available, sorry.
Screen light went dark
Front board micro and backlight of LCD screen failure. Memory cap failure. No parts available, sorry.
My speakers hum even when volume is set at lowest
This isn't really a solution, but it does work. Mine does the same thing, and I found on another forum, some one suggested that once the power is off and it starts to hum. Smack the back left top (as your are facing it) and it will stop the buzzing. I was hesitant at first, but after many fruitless searches, I gave it a try. It does work, but you have to hit it fairly hard and it may take a couple tries to get it to stop. I still can't believe no one has found a solution to this, it seems to be a common problem. If someone is a tech person, please way in on this, I am willing to take this thing apart, I just don't know what to look for. It appears that they use relays to delay the time for powering on and off the amp, once the 2-3 second delay is over after powering off, the speakers buzz loudly with a static noise.
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