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Service manual M695
Description of control unit MEL64/65
Doc code 636 718
09/93 3077-HWE
Description of functions
MEL64/65 control unit
The description is subdivIded for the main groups:
•
Control unit MEL64/65 - Section 5
•
Swingarm MSV136/137 - Section 6
•
M695 microscope - Section 7
The control circuits for zoom, focusing and XY-gear
are located partly in the control unit and partly in the microscope itself. Their
functions are described in the following sections 5 and 7.
The swingarm cable
is the electrical link between the control unit and the microscope, and is
therefore the ideal place to start looking for faults at the level of the main
groups.
The test box
is introduced between the swingarm and the microscope. It can
be used to study the supply voltages, control signals and control levels, all of
which are transmitted through the swingarm cable. Section 6 includes a list
of these signals.
5-1