Leica M695 Action, Reading, Reaction, FOCUS UP, FOCUS DN, Possible fault, Select microscope side A or B:, FOCUS SPEED set min. focus speed

Service manual M695	M695 Fault finding
Doc code 636 718	09/93 3077-HWE

Focus control

Select microscope side A or B:

•Select A or B, depending on which side the zoom works incorrect

•Select A if the fault appeares on both sides, A and B.

	Action	Reading	Reaction	Possible fault
FOCUS SPEED set min. focus speed
		1.25 . . . 1.27V
	set max. focus speed	5v +-5%
FOCUS UP
	/footswitch	>4.75V	Voltage ok, but	Microscope
		<0.2V
	non-actuated		reacts incorrect	(Focus servo,
				wiring)
FOCUS DN
	/footswitch	>4.75V
	non-actuated	<0.2V
	Separate microscope	see above
	from the testbox and		Voltages ok	Microscope
	check signals			(short circuit on
				Focus servo or
				wiring)
	Bridge swingarm with
	servicecable and verify	see above	Voltages ok	Swingarm-
	signals			cable

Voltages not ok Control unit