Functions Of Test Box - Leica WILD M695 Service Manual

Testset
09/93 3077-HWE
All control voltages . . .
. . . to the microscope . . .
. . . measure at low light
level

Functions of test box

All supply- and control voltages between the control unit and the microscope
with XY-gear can be measured.
Control voltages to the microscope are measured relative to XY_GND, such
to the XY-gear relative to GND_XY.
Unless otherwise indicated, set the lamp to minimum brightness. The voltages
indicated in Section 4 are only valid for this condition.
Voltage levels are falsfied by the voltage drop between the control unit and
the microscope. Because of the current taken by the lamp, this voltage drop
to PGND (measuring ground) can be as much as 0.9V. The control voltages
of focus and zoom are measured against PGND and are therefore influenced.
Service Manual M695
Doc code 636 718