Yashica Mat-124G problem

[federico8]

Hello I'm trying to solve a problem with my otherwise perfect Mat124G. Both the Shutter speed control dial and the aperture control dial have become very very hard. It is almost impossible to make them move. Any ideas on how I can repair this?
Many thanks

 

[BobD]

Likely not a self-service situation.

Send to Mark Hama for expert repair:
http://www.markhama.com/

 

[guitstik]

Ditto the Mark Hama.

 

[kwall]

I will personally vouch for Mr. Hama's work. I sent my Mat-124G to him and it came back working as if it was just from the factory. I have been very pleased.