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Dead Beocenter 9300

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Maurice
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Maurice Posted: Fri, Jan 30 2015 10:55 PM
I have a beocenter 9300 totally dead no standby led but voltage to the standby pcb no 63 Can anyone advise on the voltages of the STANDBY TRANSFORMER secondary windings my transformer has gone pop and I am trying to source a new item. Regards. Maurice
Beobuddy
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Beobuddy replied on Sat, Jan 31 2015 2:27 PM

Did you check all the fuses at the back of the transformer? 

Maurice
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Maurice replied on Sat, Jan 31 2015 3:21 PM

Hi beobuddy

Thanks for your reply yes I did check those fuses they were all ok 

Regards Maurice

solderon29
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solderon29 replied on Sun, Feb 1 2015 5:10 PM

It's unlikely to be a failure of the main transformer.I don't think I've had one fail yet.

It's common for the 5 volt supply to fail though,due to dry joints around the main power supply cap's.They are on sub board mounted near the transformer that carries the relay's too.

Nick

Orava
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Orava replied on Sun, Feb 1 2015 5:52 PM

You can measure ac output straihgt from transformer also.

 blah-blah and photographs as needed

Beobuddy
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Beobuddy replied on Mon, Feb 2 2015 7:42 AM

solderon29:

It's unlikely to be a failure of the main transformer.I don't think I've had one fail yet.

It's common for the 5 volt supply to fail though,due to dry joints around the main power supply cap's.They are on sub board mounted near the transformer that carries the relay's too.

Nick

 

Despite the known fact of bad solder joints and the present of the 5V, there is a chance that one of the AC fuses is blown which causes a dead 9300.

 

Maurice
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Maurice replied on Fri, Feb 6 2015 11:15 PM

Hi thanks for taking the trouble to reply, I acquired a replacement standby pcb from QDA, and it's up and running now. So thanks to all for the help

Regards Maurice

 

Designed-AV
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Designed-AV replied on Wed, Dec 2 2015 9:04 AM

Hey Maurice, I have the same problem and are trying to get standby PCBs to my Beocenter 9300th

My question:

1 - What do you mean by QDA? it is a business.

2 - How can I order the same standby PCBs

3 - Do you have any numbers on the PCBs

Best regards

Jan

www.beoshop.se

Beobuddy
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Beobuddy replied on Wed, Dec 2 2015 6:47 PM

Why would you replace the board? These are repairable.

If you can't find a replacement, you can send it over for repair. No problem.

Designed-AV
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Designed-AV replied on Fri, Dec 4 2015 9:32 AM

Thanks Beobuddy, maybe I'll do it.

You might if you have experience in the PCB63 can give me a tip how I can fix it?

Best regards

VintageStuff
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VintageStuff replied on Tue, Aug 4 2020 6:00 PM

Hi BeoBeo

My 9300 looks to have suffered the same problem. No life and the PCB tracks from the F1 output from the standby transformer have burnt through. The resistance of the coil is measuring 0.2 ohm across the F1 leads so probably no good.

Did you find a way of getting a replacement transformer?

Thank you

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