Beomaster 6000 Type 2702 service manual

[Vinlyfrontier57]

Does anyone know if the service manual for the Beomaster 6000 Type 2702 is available in the public domain on the internet.  I can find manuals for what I assume is a later Beomaster 6000, but the one I need is for the quadraphonic version circa 1974.

(Fyi the problem with the unit is that the power supply pcb (circuit board 5 on the circuit diagram) isn’t generating the 18V rail, so the input selection function doesn’t operate.)

Thanks.

[Keith Saunders]

The the following manuals are available in the Beoworld library for silver and gold members.

[hcraig244]

Are you sure its not the 21vdc that is fed from PCB2 ?

I have had a problem with the voltage regulator for the 21vdc in  the past

Craig

[Vinlyfrontier57]

Thanks for your post, Craig (#4161).

I checked the 20V and 21V rails that are generated on PCB2.  They measured 10V and 11.5V respectively, so there is a problem here too.

Can you by any chance remember which components had failed on your unit?  Was it the regulator transistor (2TR8) on the cct diagram?

Thanks,

Phil (Vinylfrontier57)

[hcraig244]

Phil

As I recall I replaced the zener diode 2D9 and the problem pesisted, I then replaced the two diodes 2D10 and 2D8 and still had an issue, I put off replacing the zener diode 0D2 because it was difficult to get at….its hidden away off PCB2 and bracketed against the front end shield box PC1, eventually I had no choice but to do so….and that solved the problem, I cant remember if I replaced 2TR8 or not….the post will be somewhere in the archived forum 2012-2022 along with pictures if you care to try and track it down…..it may help, I would recommend changing 2TR8 seeing as your going to replace the diodes…….good luck I have had lots of fun with the 6000 type 2702 amps.

[sonavor]

Here are a nice series of posts by Alain (boneofiel) showing a complete Beomaster 6000 Type 2702 restoration.  The link starts with the final post and goes backwards.  At the end of each page is a link to look at older posts to continue the thread.

There is a lot of good information in the threads.

[Vinlyfrontier57]

Craig, thanks for your recollections on which components you replaced in the PCB2 power supply circuit.

I had noticed from the circuit diagram that 0D2 isn’t actually on the pcb, and could be difficult to get at.  Having done my initial inspection without disassembling the main internals, I now need to start pulling it apart to get the the power supply circuits, starting with the tuner dial cord.  Wish me luck!

Phil (Vinylfrontier57)

[Vinlyfrontier57]

Hi sonavor, many thanks for the link to the Beomaster 6000/2702 restoration on the Beolover blogspot.  There’s a huge amount of useful info here, which I’ll read carefully.

Phil (Vinylfrontier57)

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