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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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BOSE Lifestyle 12 Repair - Receiver CD Player
Please can anyone give me any advice with my BOSE LifeStyle 12 CD
Player? The motor which is used to position the lens keeps turning even once the lens hits its stop position, so it doesn't recognise disks and makes a loud "clacking" sound as the gears jump. I think there's a problem detecting that the lens has reached its stop position. When the lens reaches the correct position, it closes a Microswitch, and the switch is working. The connections between that switch and the main board are also intact, but I'm not really sure where to go next. Is this a common problem? Has anyone fixed this problem before? Can anyone point in the right direction of the components involved in that part of the circuit? Does anyone have a schematic that would make things easier? Any help would be greatly appreciated! Thanks -- Mike -- |
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BOSE Lifestyle 12 Repair - Receiver CD Player
Possibly a bad drive IC, a bad reference at the input to the drive IC, such
as a problem with a voltage divider, a power supply problem, a system control problem, let's see. Have I missed anything? Bose' factory service is really pretty reasonable. They can quote you a price over the phone. Maybe better to send this one to them and let them have the headache. Mark Z. -- Please reply only to Group. I regret this is necessary. Viruses and spam have rendered my regular e-mail address useless. "Mike" wrote in message om... Please can anyone give me any advice with my BOSE LifeStyle 12 CD Player? The motor which is used to position the lens keeps turning even once the lens hits its stop position, so it doesn't recognise disks and makes a loud "clacking" sound as the gears jump. I think there's a problem detecting that the lens has reached its stop position. When the lens reaches the correct position, it closes a Microswitch, and the switch is working. The connections between that switch and the main board are also intact, but I'm not really sure where to go next. Is this a common problem? Has anyone fixed this problem before? Can anyone point in the right direction of the components involved in that part of the circuit? Does anyone have a schematic that would make things easier? Any help would be greatly appreciated! Thanks -- Mike -- |
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BOSE Lifestyle 12 Repair - Receiver CD Player
There's more...
After some more digging around, there's a diode on the board that doesn't seem to be working anymore. At some point it seems to have gotten very hot, as there's marking on the board. The diode is labelled D505, and is in series with a 56ohm resistor. But, the diode has no distinguishing markings. Please could anyone tell me what kind of diode this is so that I could replace it? Also, the resistor and diode just seem to be in series between the power rails, and I can't find any connection do the point between them. Please could someone tell me what the purpose of this part of the cicuit is? Have I missed something obvious? Any help greatly appreciated once again! Thanks -- Mike -- "Mark D. Zacharias" wrote in message ... Possibly a bad drive IC, a bad reference at the input to the drive IC, such as a problem with a voltage divider, a power supply problem, a system control problem, let's see. Have I missed anything? Bose' factory service is really pretty reasonable. They can quote you a price over the phone. Maybe better to send this one to them and let them have the headache. Mark Z. -- Please reply only to Group. I regret this is necessary. Viruses and spam have rendered my regular e-mail address useless. "Mike" wrote in message om... Please can anyone give me any advice with my BOSE LifeStyle 12 CD Player? The motor which is used to position the lens keeps turning even once the lens hits its stop position, so it doesn't recognise disks and makes a loud "clacking" sound as the gears jump. I think there's a problem detecting that the lens has reached its stop position. When the lens reaches the correct position, it closes a Microswitch, and the switch is working. The connections between that switch and the main board are also intact, but I'm not really sure where to go next. Is this a common problem? Has anyone fixed this problem before? Can anyone point in the right direction of the components involved in that part of the circuit? Does anyone have a schematic that would make things easier? Any help would be greatly appreciated! Thanks -- Mike -- |
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