Today, I have got Sansui XR-Q5 from secondhand shop with $30.

Bought without test and no headshell installed.

So lucky, all buttons can work properly !!!

Except tonearm that cannot operate automatic function.

After found out more information of this deck,

I think it so interest to make a new plinth with real wood.
See this link below for information of Sansui XR-Q5 
about Friction Free coreless motor and Dynaoptimum Balanced tonearm.
It’s Sansui’s step down from XR-Q7 top of the range model 
with less than 0.012% wow and flutter 
and a signal to noise ration of better than 78db. 
Silent synchrotor for smooth rotation 
and precise computer controlled fully automatic operation

Condition ……

Inside …

Power Supply Board.

Tonearm control board.

Finally found cause that make tonearm not working in automatic.
Belt that hang between motor and gearwheel was melt.
So need to replace that confirm function again
before make decision to make a new plinth.