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PF768, Standard Electrical Repairs
9 RTC
9.1 Determine the fault.
Insert a SIM card and a fully charged battery into the phone and start it up.
Set the correct time. Remove the battery and reinsert it after a minute.
• If the time says 00:00, proceed to section 9.2.
Compare to the correct time.
• If the clock is speeding or if it is halted, proceed to section 9.3.
The component side of the circuit board is shown in fig. 9.1.
Fig. 9.1
9.2
The time says 00:00 after removing and
reinserting the battery.
Open the phone and make sure the backup capacitor, C720 (class A, fig.9.2), is cor-
rectly soldered.
Fig. 9.2
50
(68)
4/00021-2/FEA 209 544/11.C
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