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22.2.2 The volume keys are faulty
Open the phone and check for liquid damages, especially around the faulty keys.
No further action should be taken for a liquid damaged telephone.
Clean the pads of the keyboard thoroughly using alcohol.
Give the board power and start the board in the test program.
Try the function of the volume keys again.
If the fault is okay, the fault was due to the side snap dome connectors, replace them due to
mechanical repair guide.
If the fault remains, the fault usually is due to D600 or a foil damage.
22.2.3 The PTT button is faulty
Open the phone and check for liquid damages, especially around the faulty key.
No further action should be taken for a liquid damaged telephone.
Clean the pads of the keyboard thoroughly using alcohol.
Give the board power and start the board in the test program.
Try the function of the volume keys again.
If the fault is okay, the fault was due to the side snap dome connector, replace it due to
mechanical repair guide.
If the fault remains, the fault usually is due to D600 or a foil damage.
22.2.4 The Alert button is faulty
Open the phone and check for liquid damages, especially around the faulty key.
No further action should be taken for a liquid damaged telephone.
Clean the pads of the keyboard thoroughly using alcohol.
Give the board power and start the board in the test program.
Try the function of the volume keys again.
If the fault is okay, the fault was due to the side snap dome connector, replace it due to
mechanical repair guide.
If the fault remains, the fault usually is due to D600 or a foil damage.
22.2.5 The Speaker phone slide switch is faulty
Make sure there is no mechanical damage at the switch on the front cover.
If there is, the front cover has to be replaced due to mechanical repair guide.
The connection between the switch, mounted on the front and the logic is non-mechanic based
on hall effect.
Open the phone and check for liquid damages, especially around N600.
4/00021-3/FEA 209 544/18 B
Trouble Shooting Guide, Advanced
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