Bang & Olufsen 5000 system
- Thread starter Donomite
- Start date
Donomite
Active Member
Donomite
Active Member
It's safe at my house now! Been giving it much love and care. Haven't gotten to experience the sound as of yet but the day is coming soon I hope. It needs some tlc first. I've got that planned as well.
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Donomite
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Hi faber. Still waiting on the parts I ordered from B&O forum member overseas. I have since removed the tuner and preamp board and cleaned both with simple green then isopropyl alcohol. They both cleaned up great! I was a little nervous with the cleaning procedure but the receiver has since been tested and still works. That was all done over a week ago. Don't won't to disassemble the unit again till I receive the parts. He also includes instructions for the recap, mute relay and bias pot replacement. Still excited.
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Donomite
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Here is a before and after of tuner board and just a after of preamp board. I see why he suggested a new muting relay on preamp pc. This relay had white like corrosion inside. I did clean up the contacts and now the volume works better. Got a new relay on the way.
i love the satisfaction of cleaning boards.
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Donomite
Active Member
Thanks I will. I printed out the 86 page service manual and the users manual yesterday. My cap kit and other parts arrived yesterday. Just finished capping tuner board. Came out great! The existing solder joints on this system are in great shape. Compared to my same year rotel equipment....B&O does a much better job soldering IMO.
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Donomite
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Tuner and preamp/muting boards recapped. Replacing that muting relay made a huge difference. Volume now works at all settings. Loving the sound quality. Now I only need the original owner to go up in his attic and find the other speaker. I offered to go up there and look. Time to power it down and continue with the recap.
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Donomite
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Update on the beomaster 5000. Recap is almost complete. Waiting on two bipolar caps for preamp board. It has a cool onboard fan that uses two thermistors I believe that are attached to main heat sink. Tested fan earlier with heat gun and it's very quiet. Got some pics of the fan and the amp/ps board. Against my better judgement I disassembled the amp/heat sink to degrease and simple green clean the board. The transistors use metal clips to attach to heat sink. It went back together easier than I thought. Top middle of heat sink is part of fan control circuit. Anyway this receiver has been a joy to work on. I powered it up late last nite and adjusted the new idle trim pots to 11mv. This morning I connected to one S80.2 speaker to left then right channel and all sounded great. Getting close to wrapping this project up. The receiver will reside in master bedroom on my bedside table for mood music lol.
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Donomite
Active Member
I sure did. Mean green removes existing compound with no problem. Thank god because it's not fun cleaning those fragile mica sheets lol. Oh and the last two caps showed up earlier today. Two green nichicon muse bipolar. About to install them then button this thing up. The covers been off for quite a while. Can't wait to see it on the nite stand. Pics of that to follow.
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