Leica M500 N Service Manual page 42

Fault finding
08/2007 Gahe
Zoom/multifoc motor controller 10661250 (M500 N/M520 only)
LED 1 green Watchdog - blinking with 2Hz,
indicates that the main program is
running.
LED 2 red Enable zoom - "On" when the zoom
motor is driven or short-circuited
(damaged). "Off" when the motor is
set free.
LED 3 yellow Enable multifoc - "On" when the
multifoc motor is driven or short-
circuited (damaged). "Off" when
the motor is set free.
LED 4 green +5V-Powering - "On" when the
switching regulator is working.
4-4
LED 4
LED 2 LED 3 LED 1
Service manual M500 N, M520, M525
Doc Code 10 665 751