Testset

Service

Manual M695

09/93 3077-HWE

Doc

code 636 718

 

 

 

 

Functions of test box

All control voltages . . .

All supply- and control voltages between the control unit and the microscope

 

with XY-gear can be measured.

. . . to the microscope . . .

Control voltages to the microscope are measured relative to XY_GND, such

 

to the XY-gear relative to GND_XY.

. . . measure at low light

Unless otherwise indicated, set the lamp to minimum brightness. The voltages

level

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.