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Vintage Audio (record players, hi-fi etc) Amplifiers, speakers, gramophones and other audio equipment. |
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11th Jun 2021, 11:23 am | #1 |
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B&O beomaster 3000 stereo lamp
Hallo friends,
I have a problem of the stereo lamp which dosen't work. of course the lamp's OK. Radio works perfect except the light. There is no faulty semiconductor or any other component. I have tried some ferrite and turned back the original positions. nothing have changed. Is there any idea about the problem. |
11th Jun 2021, 11:57 am | #2 |
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Location: Bedfordshire, UK.
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Re: B&O beomaster 3000 stereo lamp
Have you checked to make sure its not got the Mono Switch selected on the tuner? Daft but worth a check otherwise start looking at the detector stages etc with a scope-does seem a bit odd and assuming you have carried out the checks of lamp etc incircuit with voltages etc from drivers etc?
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11th Jun 2021, 1:49 pm | #3 |
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Re: B&O beomaster 3000 stereo lamp
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20th Aug 2021, 9:15 am | #4 |
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Re: B&O beomaster 3000 stereo lamp
Surely I've checked voltages and all the transistors of the detector stage. I unfortunately don't have any scope. Sometimes not the center but side of any station (when the sound is dirty) the stereo light turns on but not on the center and of course when the light is off there is no stereo effect.
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20th Aug 2021, 9:17 pm | #5 | |
Heptode
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Re: B&O beomaster 3000 stereo lamp
hkutluk said:
Quote:
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Cheers - Martin ZL2MC Last edited by majoconz; 20th Aug 2021 at 9:29 pm. |
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21st Aug 2021, 10:06 pm | #6 |
Hexode
Join Date: Dec 2020
Location: Raunds, Northamptonshire, UK.
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Re: B&O beomaster 3000 stereo lamp
This may seem like an obvious question but is the reception of the tuned radio station strong enough to light the lamp, weak signals often won't.
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9th Sep 2021, 6:23 pm | #7 | ||
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Location: GB
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Re: B&O beomaster 3000 stereo lamp
It is old fashioned. There is no decoder chip nor a pll circuit. There is an attachment of the schematics in my post.
Quote:
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