A1018s/A1018sc Standard Electrical Repair
9 Illumination and buzzer
9.1 Type of fault.
Insert a SIM card and attach a dummy battery to the phone. Start the phone by
pressing the On/Off -button and wait for the phone to get serv (against an instrument
or a Oreal� network).
Y If the phone doesn?t beep directly at start, go to OMenu/Ring Vol� and try to raise
the volume (not from full to Ostep� as that doesn?t generate any sound). If the
buzzer sounds faint or not at all, proceed to section 9.2.
Y If the background illumination for the display doesn?t light up at start, proceed to
section 9.3.
Y If the keyboard illumination doesn?t light up at start, proceed to section 9.4.
Y If the top indicator doesn?t �ash green when the phone has got serv, proceed to
section 9.5.
When the phone has got serv and �ashes green, lower the battery voltage to 4.2 V.
The top indicator should then start to �ash red, the battery indicator in the display
should show an empty battery and the phone should warn with a beep.
Y If the battery indicator doesn?t show an empty battery and the phone doesn?t
either beep or �ashes red, the phone needs a battery calibration.
Y If the battery indicator shows an empty battery and beeps, but the top indicator
doesn?t �ash red, proceed to section 9.6.
9.2 The buzzer is faint or dead.
Open the phone and check for liquid damages.
Make sure H600, V605, V606, R606, R651 or D600:91 is correctly soldered.
Fig. 9.1
4/00021-2/FEA 209 544/16.B32(42) |