Dear Forum members

I am in the process of repairing the above radiogram. The radio chasis is CS155WE/f.MS . In this set the OFF push button does not have a integral switch but a separate ON/OFF switch is mounted on the chasis and this switch is operated by a string which is attached to the OFF pushbutton. Since the switch had become faulty somebody had bypassed the switch and removed the string which was attached to the OFF push button. I wanted to bring this into original operating condition. I removed the switch and with great difficulty dismantled the same. The switch was cleaned and fitted back. There is a spring attached to the lever of the switch and keeps it always in ON position. I have a attached a new thread from the OFF push button to the lever of the switch. When the off pushbutton is pressed the thread pulls the switch lever bringing the switch to the OFF position. When any of the band switch push button is pressed the Off push button gets released and due to the spring the switch comes to ON position. But this arrangement is not working satisfactorily. The schematic or the service manual does not give any details of this arrangement. Can anybody help me in this regard and also has the complete service manual for this radio chasis?

Best Regards

P.Rajan

What a construction with that switch.
Is a steel threat not a better idea?

Is this manual usefull ? Mandello Solid State 3/U Ch= CS155U/MS

Staalkoordjes kunnen bij breuk sluiting veroorzaken. Soms werden dan geplastificeerde staalkoordjes gebruikt.
Overigens was kennelijk niet de mechanica het probleem, maar de schakelaar zelf.

Dear Members

Thanks for your reply. I have the original schematic similar to what is given in the radio museum site but it is only the schematic and no other details are available. One more thing which I wanted to ask was that in the schematic on the right site it is mentioned that " Connection for MV3", What is the meaning of this? It is a D.C. Supply.

Regards
P.Rajan

Thats the DC supply for a Pre-Amplifier.

With that unit you can attach a recordplayer with a Moving Magnet Cardridge
instead of the crystal

Gundig MV3 Pre Amplifier

One more thing which I wanted to ask was that in the schematic on the right site it is >mentioned that " Connection for MV3", What is the meaning of this? It is a D.C. Supply.

Regards
P.Rajan

Could be a preamp for a mageneto dynamic phono cartridge.

Oops! Maurice was somewhat earlier.