Service Manual
Page 24
... damage. LED" . The illumination should see a pattern check that no discolorations. 4. Troubleshooting Display/Illumination problems Make a general visual inspection for approximately 20 sec Turn the phone on . The illumination is not mechanical damaged, dirty or oxidized. Go to service test menu; You ...all LEDs light ever over the keypad. LCD" . If necessary replace the LCM. If necessary replace the LED with the weakest light. Repeat this step until all 10 Keypad LEDs have the same illumination strength. Turn the phone on . Turn the phone on. Go to service test ...
... damage. LED" . The illumination should see a pattern check that no discolorations. 4. Troubleshooting Display/Illumination problems Make a general visual inspection for approximately 20 sec Turn the phone on . The illumination is not mechanical damaged, dirty or oxidized. Go to service test menu; You ...all LEDs light ever over the keypad. LCD" . If necessary replace the LCM. If necessary replace the LED with the weakest light. Repeat this step until all 10 Keypad LEDs have the same illumination strength. Turn the phone on . Turn the phone on. Go to service test ...
Service Manual
Page 26
Go to service test menu; choose "5.Keypad". Fig.9.1 - 27 - 4. Clean the key pads If necessary (Fig.8.2.). Turn the phone on. Check that the mechanical response feels normal and that the system connector (Fig.9.1.) is accomplished with the system connector: Make a .... Replace the Metal dome If necessary (Fig.8.1.). Press all the keys had been shown in the Main display. Troubleshooting Key Function Problems Make a general visual inspection for corrosion or oxidation from liquid damage. Check that the mechanical response feels normal and that all the buttons.
Go to service test menu; choose "5.Keypad". Fig.9.1 - 27 - 4. Clean the key pads If necessary (Fig.8.2.). Turn the phone on. Check that the mechanical response feels normal and that the system connector (Fig.9.1.) is accomplished with the system connector: Make a .... Replace the Metal dome If necessary (Fig.8.1.). Press all the keys had been shown in the Main display. Troubleshooting Key Function Problems Make a general visual inspection for corrosion or oxidation from liquid damage. Check that the mechanical response feels normal and that all the buttons.
Service Manual
Page 51
Troubleshooting Keypad Problem Start Check test mode YES Check Power on key YES Check U100 YES Keypad will work properly NO Clean the PCBA pad NO Change U400 NO Change U100 - 52 - 4.
Troubleshooting Keypad Problem Start Check test mode YES Check Power on key YES Check U100 YES Keypad will work properly NO Clean the PCBA pad NO Change U400 NO Change U100 - 52 - 4.
