Minolta dialta di 350

Bonjour,
Voila les infos sur l'erreur
C1038 Engine connection error ·
The system fails in checking initial engine connection
when Power Switch S1 is turned ON.
· The system succeeded in checking initial connection
when S1 was turned ON; then it fails in rechecking
initial connection through the execution of a
software reset when a communications error occurs
during operation.
C1038
1. Check the connection between PWB-A and UN2, reset the malfunction, and
turn OFF and ON the Power Switch.
2. If the same malfunction persists, change PWB-A or UN2.
Bon courrage