GH688,GA628, Standard Electrical Repairs
4/00021-2/FEA 209 544/1.G 50 (112)
8.3 One or more keys faulty.
Open the phone and check for liquid damage, especially around the keys that are
faulty.
Clean the keyboard pads thoroughly and assemble the phone with a new keyboard.
Check functionality according to 8.1.
If it didn’t help, open the phone, give it power and start it up.
Measure VDIG (~3.2V) on C600 (fig. 8.2).
• If VDIG is incorrect, proceed to chapter 3 (“Doesn´t start”-fault).
Fig. 8.3
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