Hello, I'm Josep Romeu from Barcelona ( Catalonia)
I'm having problems with a old ( 1967) reel-to-reel Braun TG-504 that I inheridet from my father.
It turns on, the lights come on, but nothing works.
I've got the service manual and I could verify that the power supply is giving the correct voltages but no relais is activated and any motor spin.
If there is any expert in reel-to-reel Braun who can help me, I would greatly appreciate it.
Thanks a lot!
Josep
Comments
Thank you for your answers.
The 30 V Voltage (137-138) is OK and the C801 is also OK.
The coils of the relais mesure 1100 ohm so they are no open.
Have you ever encountered a blocked relai?
I mean that the coils is not open, the voltage is correct and the relais don't activate?
Either way, I will change the capacitors and check the relais again.
Thak you very much for your answers.
Josep
1
Hello, I have already fixed the reel-to-reel Braun TG 504.
The failure that I had mentioned to you that it would not start any engine, was not a failure.
This recorder has a remote system with a DIN connector on the rear panel that must be plugged in for operation. If you don't have this remote control (TGF1 or similar) you must cross pins 1 and 2 of this connector to return the voltage to the relays.
Once this was done, all engines were started.
But it had another failure, the capstan motor wouldn't start. If you give it a small push, it would start spinning without any problem.
The problem was capacitor C005. After replacing this capacitor with two capacitors of the appropriate value, the reel-to-reel works perfectly.
Now all I have to do is find a collector who is interested in acquiring it. Is possible any of you?
Can you give me some pointers?
Thanks
Josep
3
Hello Josep!
Good job,congratulations!
I would suggest a facebook collector group(there are many), or e-bay.
Would you attach a foto of the recorder?
TJ
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In this link you can find photos and information of the Braun TG 504: https://www.braundesign.es/grabador-reproductor-de-cinta-tg-504/
Do you know if there is any website for collectors these types of devices?
Thanks
Josep
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Hello, I'm sorry but I don't know how to send photos to the forum. Can you give me some explanation how to do this? Thanks
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Hello Josep!
Relay contacts are often molded-burnt together, real service is only a new one...
Kari
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Hello,
Resolder the relay (and power supply ? ) board.
Do the function switches work?
Ohm's law still exist,so try to locate where is the problem.
To be continued,good luck!
TJ
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Hello Josep,
Welcome on board.
Check on the relay board (relaisleiter platte) the 30 V DC .
wire number 137,138 (red,brown) This is the input voltage for relay board.
It comes from the power supply board (netzteil) from 82-83 (red ,brown wire)
The relay control is a simple function switch or external wire remote control .Try to check and replace the c801 1000uF capacitor.Check and clean the function switches.
Check the soldering pins,wires,voltages.
Are the rubber parts OK? (belts,idlers,etc)
To be continued,good luck to repair.If you want to send a PM,torokj at gmail dot com
1
Helló:
SM
https://elektrotanya.com/braun_tg_502_tg_504_sm.pdf/download.html
Bálint
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Szia!
Van doksija, s annak alapjan meg is allapitotta, hogy a tapok rendben vannak, csak egyetlen relè sem müxik, motor nem indul-ehhez ker impulzust...
Kari
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