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Old 7th April 2007, 01:18 PM   #21
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There is a service manual available on exchange basis at The Audio Circuit. Here is the link:

http://www.audiocircuit.com/index.ph...omaster%201900
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Old 9th July 2007, 06:56 PM   #22
esco is offline esco  United States
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Default Beomaster 1900

I also need help on finding a manual/schematic for a Beomaster 1900 system and if anyone has such an item on pdf format I would be very grateful to recieve it. My email is fx4movies@yahoo.com. Thanks, Nick
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Old 9th July 2007, 08:27 PM   #23
es44 is offline es44  Denmark
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I hope one of the guys can give you a hand here. All my SM's are gone in a HD crash. Yes, it was my back-up HD .

Best regards Ebbe
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Old 13th June 2009, 11:13 PM   #24
sunhill is offline sunhill  Sweden
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Default b&o manuals available att beomanuals.com

hi, the beomaster 1900 manual is available at beomanuals.com

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Old 4th July 2010, 07:27 AM   #25
tmblack is offline tmblack  United Kingdom
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I need to get to the pots and lamps for replacement.
Does anyone have information on how to remove the main circuit board?
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Old 5th July 2010, 03:53 AM   #26
tmblack is offline tmblack  United Kingdom
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I need to get to the balance and tone controls.
Where on the circuit boards is section 4 on the schematics?
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Old 29th July 2010, 03:41 PM   #27
yachadm is offline yachadm  Israel
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Hi TMblack
It's a very complicated exercise to completely remove the main circuit board of the BM1900, 2300, 2400, etc. It's actually not 100% necessary.

1. Unscrew all the large philips-head screws holding the green PCB down,
2. Desolder the 2 enamelled wires coming out of the transformer,
3. Desolder the 4 main output transistors
4. Unscrew the small philips-head screws holding the heat sinks to the green PCB

Then, it should release and you should be able to move it this way and that, in order to get access to all components.

A bit tricky, but certainly doable.

You do not need to throw away your volume/balance potentiometers. They are easily cleanable with deoxit lube, and work as good as new

Usually on these units, a complete recap is required, and also replacement of all trimmer potentiometers. For best results, read my article about choosing quality components when restoring vintage audio (and other articles) on my homepage.

http://www.condoraudio.com/wp-conten...-Resistors.pdf

Regards
Menahem Yachad
Condor Audio |
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Old 12th April 2012, 07:33 PM   #28
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Smile beomaster 1900

Quote:
Originally Posted by es44 View Post
I have a servicemanual for Beomaster 1900 type 2903/4. It's approx 3.2Mbyte, and if those interested have enough space in their e-mail, i can send it.

( unless there's something mechanical or trafo is burned, i would say it's possible to repair)

Best regards
Ebbe
Ebbe I have a beomaster 1900 and can you please send me the manual too mine has blown both output transistors because the one connection to the mains tranny was loose what horrible mechanical design where have they learnt to build hi fi? I was taught that the mains must be kept away from input but B&O play with fire my e-mail address is gerteningrid@iburst.co.za
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Old 17th July 2012, 09:59 AM   #29
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Hi all,

I'm trying to fix a volume issue on my Beomaster 1900-2 T2903 P3. The service manual I have (Beomaster 1900 Type 2903/4) is very different from the actual machine, as are the schematics (which are different again from the service manual(???). Anybody knows where to find a proper manual for my machine?

Regs,

Adam.
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Old 20th July 2012, 06:48 PM   #30
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Angry TIP142/147

Quote:
Originally Posted by krokkenoster View Post
Ebbe I have a beomaster 1900 and can you please send me the manual too mine has blown both output transistors because the one connection to the mains tranny was loose what horrible mechanical design where have they learnt to build hi fi? I was taught that the mains must be kept away from input but B&O play with fire my e-mail address is gerteningrid@iburst.co.za
Hi Guys
My B*O hi fi need the output transistors and the only types available are those in the top66 package AND THOSE IN THE AMP ARE TOP3 The databooks show that the top66 package are only 15watt and the top3 packs can handle 135watts and the mountings make fitting difficult if not impossible.Ever worked on them? Do some of you know of equivalents as the manufacture apparently stopped 35 years ago, spec pnp / npn darlington Vceo 100 volts etc Imax 10 amps
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