The soldering isOK.
No offense, but there are several photos here
from people that said the same thing. Please post photos.
How voltage must be measured on outputs and inputs?
The data are same if TC is or isn't connected.
how is possible test the board? Chip?
The TC voltages are in the microvolt range. This is below the range of most multimeters. The outputs are digital signals. If you are getting an internal temp reading, your connections to the Arduino are correct. The thermocouple error is usually due to a broken thermocouple or a bad connection.