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Bang & olufsen Penta amp repair - circuit diagram needed

Discussion in 'Troubleshooting and Repair' started by punkieys17, Dec 31, 2019.

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  1. punkieys17


    Feb 7, 2016
    4 years ago I started the repair of a B&O Penta 6602 amplifier from the base of a speaker. Got the main circuit behaving but found a problem in the input board. Unfortunately having just dug the circuit board out from the heap of other projects I realise I don't have the right diagram. The circuit board I have is labelled 8002831E...the closest circuit diagram I have found is labelled 8002831 which shows 6 transistors.... I have transistors 1 to 6 plus 8,9,10, 15 and 16. This should be a Penta Mk1 (GB version) according to the 6602 part number. Any help greatly appreciated.
  2. Martaine2005


    May 12, 2015
  3. punkieys17


    Feb 7, 2016
    Hi Martaine2005. No its none of those. I've messaged Beomanuals to see if they could help but no reply. If you go into those manuals you will see the circuit diagram relating to board 2 (marked 2-4) has a number at the top left....either 8002831 or circuit appears to be a mid-life upfdate between the two versions....I've even messaged B&O but no reply..
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