POLAR 92 EMC backgauge position not displayed

Could I ask for help with following problems on POLAR 92 EMC machine:
1. Backgauge position is not displayed (only small dot on dispalay)
2. The backgauge is moving only back (increasing cutting size) with forward or back direction button pressed.
Any advise or service manual (electric drawings) very welcome.

Regards,
Pucek

 

Good morning Sir
Hope you are well
Maybe i can help you
I recommend that you test the power supply for Keyboard-display BT +9Vdc (8.4-9.6 tolerance)
+5Vdc for Keyborad.
Use the schematic diagrams please , and good Tester DMM , like fluke
or course try to see if there are some Connector loose, broker pins, or wires looses, or corrosion.
contact me any doubt or question

 

Of course that the first step in troubleshooting.
Let me know any results.

 

We haven't any electric diagrams for this machine.
According checks done in undertable electronic boards panel, all voltage is normal.
In addtion backgauge motor is running only in one direction (to inrease size).
If you have any advise, please let me know.
Regards,
pucek

 

Hi sir
How is the voltages is Normal, is You do not have schematic diagrams, and Tolerance