Schiller machine is not printing

What is the cost of thermal head

If the unit print lightly or not printing anything at all?
The most common causes for not printing ECGs is one of those:
1- Too little heat on the stylus
2- Insufficient stylus pressure on the paper
Solutions:
1- Using an insulated probe, such as a screwdriver, gently press the stylus onto the paper.
2- If a dark line appears on the paper, the problem is too little pressure, but if no dark line appears, the problem is not enough heat.