What the thread found

• The M-1 motor may spin uncontrollably for 5-10 seconds upon power-up and again when the focus knob is operated
• This issue persists even when multiple different motor cables are tested, suggesting a motor defect rather than a cable problem
• The spinning behavior has been observed by multiple users with this equipment

Depends on

• The root cause was not definitively confirmed in the thread
• No solution or repair outcome is reported
• The issue may be specific to certain production batches or units from this era

Parts

Follow Focus

Same gear or parts

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