Panne

Frame counter does not reset / endless winding

Frame counter reset failure and endless winding documented in the Mamiya repair database.

Symptome

After rewinding or returning to the expected initial state, the frame counter:

does not return to 0
returns only partially
may return intermittently or remain stuck
winds through the whole film without allowing release
overlaps frames

Possible contexts

Mechanical lead to check first

Useful targeted checks

Contextes

Body stored for a long time
Dirty mechanism or movement slowed by old deposits
Return sometimes improves after manual manipulation

Causes a envisager

For this symptom, inspect the frame-counter toothed wheel area and the small lever that slides in its rail. Local dirt can be enough to block or slow the return to zero.

Checks utiles

Observe whether the toothed wheel turns freely
Check whether dirt or residue is dragging under the wheel
Check that the lever in the rail is not obstructed or stuck by deposits
Check whether targeted cleaning of the frame-counter area improves the return; see the procedure