EziWeigh5i, EziWeigh6i, EziWeigh7i, WOW2, DAS WOW2
Issue 2, 7/2017 22
Repair procedures
LCD handling and storage precautions
The LCD is made of glass. Do not subject it to mechanical shock.
If the LCD is damaged and the liquid crystal substance inside it leaks out, be sure not to get any in
your mouth. If the substance comes into contact with your skin or clothes, promptly wash it off using
soap and water.
Do not apply excessive force to the display surface or adjoining areas, as this may cause a variance in
the colour tone.
The polariser covering the display surface of the LCD module is soft and easily scratched. Handle it
carefully.
If the display surface is contaminated, breathe on the surface and gently wipe it with a soft dry cloth. If
still not completely clear, moisten cloth with IPA. Do not use water, ketone or any aromatic solvent as
they will damage the polarizer.
Do not attempt to disassemble the LCD.
If the logic circuit power is off, do not apply the input signals.
If you must remove the LCD from the case front, cover the display surface with 3M protection tape
(part no. GET00039).
When storing LCD modules, avoid exposure to direct sunlight, light of fluorescent lamps or harmful
gases. The recommended storage temperature range is 0 to 40 °C (32 to 104 °F) and the relative
humidity should be less than 80%.
Using flexible printed circuits (FPCs)
When servicing an indicator, flexible printed circuits (FPCs) may need to disconnected and connected.
Ensure these guidelines are followed:
• Do not force an FPC out of its connector. FPCs can be easily damaged.
• Tracks on the FPC have a pitch of only 0.5 mm (1/50“) and are only on one side of the strip. It is
therefore critical that they are inserted straight and in the correct orientation.
The FPCs used for the load bar and power/communication connectors and for the 7 segment LCD all
connect the same way.
The FPC used for the dot matrix LCD has a locking bar on the FPC connector .
EziWeigh6i and EziWeigh7i - To disconnect and reconnect the dot matrix LCD FPC (marked LCD 2 on the PCA)
To disconnect the dot matrix LCD FPC:
1 Place fingertips behind the locking bar.
2 Lift up the locking bar on the FPC connector to open the lock.
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