Mirror stuck up or intermittent return

Symptome

After release, the mirror may:

• remain stuck in the raised position
• return only from time to time
• return intermittently or with abnormal timing relative to the cycle

Contextes

This symptom may be part of a wider incoherent-sequence case, but it deserves its own entry because it is common and easy to spot on the bench.

The central incoherent cycle across multiple speeds entry keeps the overall view of cycle, power-supply, and sequence causes.

Causes a envisager

When behavior becomes partly better without becoming clearly stable, inspect the MS clutch / 1st curtain brake area and the return of the small sequence levers first.

Checks utiles

• Observe whether the mirror stays up constantly or only intermittently
• Note whether the return changes after rest, on the second release, or after manual manipulation of the mechanism
• Check whether targeted cleaning of the clutch / brake area improves the return
• Cross-check with the incoherent-cycle diagnostic procedure if other speeds or Bulb are also abnormal

Heuristique

Treat a mirror stuck up as its own diagnostic entry, then quickly check whether the symptom is part of a wider incoherent cycle.