BeoLab 8000 different PCB02 versions: schematics?

[KolfMAKER]

Having worked on a few BeoLab 8000’s, I noticed that the layout of PCB02 can be different between different serial numbers. Looking for info about this, I read somewhere that PCB02 has versions 01, 02, 03 and 04.

Question

1. Is this correct, and how can they be recognized? (If not correct, please explain)
2. I have only one service manual, with one version of schematics. Where can I find the schematics of all these different versions?

Location: The Netherlands

[LeHe]

You are a silver member. Look at the service manual in the database of schematics, it already includes two schematics. one without ( date 11-1991) and one with ABL.( date 03-93 ) printed on de pages, including other PCB layout.

Furthermore what I have noticed, B&O works with alphabetical revision nummers printed on the PCB by changes, such as ‘PCB partnummer’  Rev N and also with version nummers with a number behind the PCB part number like ‘6142169(0) ~ ver 0’

[LeHe]

I have been in contact with B&O Denmark. They only release are the basis schematics and PCB02 layout for the MK1 of 1991, in the version without and with ABL with other Woofers. All documentation of mutations after that date are only accessible to the dealer, read themselves.

These modifications are mainly layout adjustments of the PCB02 for small additions such as extra capacities for decoupling and layout adjustments due to other component dimensions in the years, with makes it seem as if the PCB02 and therefore also the schematic has changed completely. But 99 procent is still the same as the basis schematic of 1991.

Al possible defect are easy to trace with that basis scheme from 1991 and modifications play no role in that, only then you have to trace the components on a custom PCB02 of that serial number.

[Author]

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