If you have to perform maintenance tasks for your Jawa 350 TS then it is usually recommended to possess a Workshop Manual to keep just for a reference if you want to know how to remove a particular component like the Dashboard and fit it again in the correct manner.
Jawa 350 TS Workshop Manuals will give you specific diagnostic details with regards to your car therefore if something is faulty it will help you work out what the problem is and tips to make it better. You can then determine if this can be done on your own or if ever the job is just too big you are able to make a reservation for your 350 TS in with a trusted mechanic.
Jawa 350 TS manual