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8 Key Problems
•
Make a general visual inspection for corrosion or oxidation from liquid damage. No
further action should be taken for a liquid damaged phone. Handle the unit on according
to the local company directives.
•
With the phone on and inserted SIM, press all of the buttons. Sound should be heard from
the buzzer if Settings/1.Sounds&Alerts/8.Key Sound/Click (or Tone) is selected.
Numbers shall appear in the display.
Another way of testing the keyboard is to use the service tests in the software, see chapter
12. Service functions in the software.
Choose: 3. Service tests / 3. Keyboard. The pressed key is shown in the display and a
click is heard (even if it not is selected phone settings).
Check that the mechanical response, when the keys are pressed, feels normal. If
necessary, replace the keyboard and/or the dome assembly.
•
With the phone on, press both of the volume buttons (Fig. 1). "Status" should be shown
in the display.
Another way of testing the volume button is to use the service tests in the software, see
chapter 12. Service functions in the software.
Choose: 3. Service tests / 3. Keyboard. SideUp or SideDown is shown in the display and
a click is heard (even if it not is selected phone settings).
Check that the mechanical response, when the keys are pressed, feels normal.
If necessary clean the contact surface on the PCB (Fig. 2). If necessary replace the
volume switch and/or volume button.
•
If the fault still remains handle the unit on according to the local company directives.
4/00021-2/FEA 209 544/62 C
©
Ericsson Mobile Communications AB
Fig. 1
Repair Instruction, Electrical
Fig. 2
11(16)
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