Service manual M695

M695 Fault finding

Doc code 636 718

09/93 3077-HWE

 

 

Voltage

Action

R e a d i n g

Reaction

Possible fault

 

 

 

 

 

24V M I C R O

1.Lamp to min.brightness

 

2.Lamp to max.brightness

 

3.Lamp back to min.

 

brightness

26V

+-5%

Microscope reacts -

Check supply-

20V

+-5%

but incorrect

lines of 24V and

 

 

 

check PGND -

 

 

 

page 4-6

 

 

Microscope without

Wiring of

 

 

any function

microscope

Switch off, bridge swing-

microscope reacts

Swingarm cable

arm with servicecable and 26V +-5%

switch on again

 

 

 

 

 

Switch off,

Voltage ok

evtl. short circuit

Separate microscope from 26V +-5%

testbox and switch on

 

in the microscope

 

Voltage not ok

Control unit

4-5