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Service Manual
Third edition, June 1997
9.4.2 Work Station monitor image located incorrectly, distorted or discolored.
Static field distorting the image.
• Press the degauss-switch, see chapter 3.5.
Image settings incorrect.
• Adjust image settings, see chapter 3.5.
Some object is disturbing the magnetic field controlling the image.
• Check for any large metal object, radio transmitter, magnet or
transformer placed close to the monitor.
9.4.3 No new windows can be opened on the Work Station or Work Station
cannot be started.
Hard disk failure or software incorrect.
• Install new software, see chapter 3.6. Start the Work Station. If it is
still not possible start it, replace the hard disk, see chapter 3.2.
9.4.4 Light Pen is not functioning
The setting of the light intensity of the monitor is too low.
• Increase light intensity, see chapter 3.5.
Cable or Light Pen is faulty or disconnected.
• Check cable and connectors.
• Replace Light Pen. It is included in the Complete Spare Parts set.
• Use arrow-keys on keyboard to move the cursor. Hold an arrow-key
down to move the cursor quickly.
Light Pen Interface Board in PC is out of order.
• Replace Light Pen Interface board, see chapter 3.4.
9.5 Level Unit
9.5.1 Backup Display is blank.
The display automatically switches off after approximately 20 minutes
after the last key pressing.
• Press any key on the keyboard.
9.5.2 No response when pressing the keys on the Backup Display’s keyboard.
Connectors or flat cable between LCI and Backup Display is faulty.
• Check cable with connectors. If necessary, repair or replace cable.
Display or keyboard is broken
• Replace the Backup Display (including keyboard).
LCI board is not functioning
• Check LCI board. If faulty, exchange the board. See chapter 5.7.
9.5.3 Watch Dog LED on LCI board is on (the lowest LED)
LCI Board might be faulty
• Restart Level Unit and then watch the LCI’s watch dog LED. Check
Work Station for message “Level Unit Communication Failed”. If
watch dog LED goes on again, replace the LCI board, see chapter 5.7.
9.5.4 Backup Display shows “No flash program”
LCI Software faulty
• Load new software into the LCI. See chapter 3.23.