Hi!
I'm in the proccess of recapping an old Becker car stereo from the 80s that has some problems. It takes about half an hour to be able to hear anything or regulate the volume, and the tuners are dead. Bad caps are known in this models, full of FRAKOs and ROEs. Since maybe the majority of these units have been stored for years on a basement, problems arises.
The problem I have is, I got the Becker service manual and schematics. At the end of the manual it has a complete BOM of the parts, including elko's or electrolytic capacitors. It specifies a Becker number part and capacitance for every capacitor, but not voltage.
I took a close inspection of the unit and, being a car stereo, the input filter cap and amplifier ones are rated at 16V, which is fine since a car runs on about 14V. But I see other caps in the unit with strange values (25, 35, 50 and even 63V!). I don't understand why these values since it's a 14V powered unit, with 12V and 5V regulators.
For example, the cap indicated on this image is rated at 63V and I can't understand why
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My question is, is this needed? Isn't it overrated? My doubt comes because if I follow this rule, the service manual would be useless and I would have to do a complete inventary of each capacitor, one by one, looking at the unit and there are about 65 electrolytics! Do you think of any problems of using that could arise on using 25V caps, which I think should be more that enough, or am I missing something? I know that same or bigger voltage value caps should be used, but my question is if this factory values are to be followed.
Thank you!
I'm in the proccess of recapping an old Becker car stereo from the 80s that has some problems. It takes about half an hour to be able to hear anything or regulate the volume, and the tuners are dead. Bad caps are known in this models, full of FRAKOs and ROEs. Since maybe the majority of these units have been stored for years on a basement, problems arises.
The problem I have is, I got the Becker service manual and schematics. At the end of the manual it has a complete BOM of the parts, including elko's or electrolytic capacitors. It specifies a Becker number part and capacitance for every capacitor, but not voltage.
I took a close inspection of the unit and, being a car stereo, the input filter cap and amplifier ones are rated at 16V, which is fine since a car runs on about 14V. But I see other caps in the unit with strange values (25, 35, 50 and even 63V!). I don't understand why these values since it's a 14V powered unit, with 12V and 5V regulators.
For example, the cap indicated on this image is rated at 63V and I can't understand why

My question is, is this needed? Isn't it overrated? My doubt comes because if I follow this rule, the service manual would be useless and I would have to do a complete inventary of each capacitor, one by one, looking at the unit and there are about 65 electrolytics! Do you think of any problems of using that could arise on using 25V caps, which I think should be more that enough, or am I missing something? I know that same or bigger voltage value caps should be used, but my question is if this factory values are to be followed.
Thank you!
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