SH888, S868, Standare Electrical Repair
4/00021-2/FEA 209 544/3.D
43
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10 RTC
10.1 Finding the fault.
Start the phone with a SIM-card and a fully charged battery inserted. Set the correct
time. Remove the battery and reinsert it after a minute.
•
If the time says 00:00, proceed to section 10.2.
Compare to the correct time.
•
If the clock is speeding or is halted, proceed to section 10.3.
10.2 The time says 00:00 after removing and
reinserting the battery.
Open the phone and make sure the backup capacitor, C720 (class A, fig. 10.1), is
correctly soldered.
Fig. 10.1
If it is, replace it. Assemble the phone, start it up and set the correct time. Wait a few
minutes for the backup capacitor to charge. Remove the battery and reinsert it after
a minute. Check if the problem is fixed (the backup capacitor needs a few hours of
charging to reach full capacity). Compare to the correct time.
•
If the clock is speeding or is halted, proceed to section 10.3.
10.3 The clock is speeding or is halted.
Open the phone and make sure pins 117 and 118 of D600 (fig. 10.2) are correctly
soldered. Also make sure the RTC crystal, B600, is correctly soldered. If it is,
replace B600, C690 and C691 (all are class A and displayed in fig. 10.2).