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PF768, Standard Electrical Repairs
• 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 get charged. Remove the battery and reinsert it after a minute.
Check if the fault 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 if it is halted, proceed to section 9.3.
9.3 The clock is speeding or it is halted.
Open the phone and make sure the B600 crystal is correctly soldered.
• If it is, replace B600, C690 and C691 (all of class A and in fig. 9.3).
Assemble the phone and compare to the correct time.
Fig. 9.3
51
(68)
4/00021-2/FEA 209 544/11.C
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