You are here

Braun TG-504 turns on but nothing works

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
Josep Romeu
Josep Romeu picture

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

Kari
Kari picture
*****

Hello Josep!
Relay contacts are often molded-burnt together, real service is only a new one...
Kari
 

0

torokj
torokj picture

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

0

torokj
torokj picture

Hello Josep,
Welcome on board.smiley
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

SzBálint
SzBálint picture
***

0

Kari
Kari picture
*****

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

0