Trouble Shooting Guide, Mechanical
4/00021-1/FEA 209 544/21 C 6(13)
5 Display/Illumination Problems
• Switch ON the telephone and check the display. If all the segments (characters) are missing,
check that the display contact surface on the board is free from dirt/ dust (Fig.1). If
necessary clean it. Check the display elastomer for dirt/mechanical damage (Fig 2). If
necessary replace it according to the working instructions. If the fault still remains, replace
the display according to the working instructions.
• If some of the segments (characters) are missing, or the contrast is bad, replace the display
according to the working instructions.
• Make a general visual inspection for oxidation or corrosion from liquid damage. No action
is taken for liquid damaged telephone. Send the unit on according to the local company
directives.
• If the fault still remains send the unit on according to the local company directives.
Fig.1 Fig.2
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