6
Innovating Customer Value
Inventec Confidential
Check whether
D501,R548(10K) is
broken
N
Y
Replace a earthed
capacitor corresponding to
the defective pin, Check
whether it is OK
N
Change D501,R548
Change U501
Check whether the
output frequency of
X100 is 32.768K
Y
N
Connect with the battery,
press “NO” key, check
whether the output voltage
of U501 is normal
Y
N
C509:1.8V, the capacitor: C509;
C511:2.8V, the capacitor: C511:
C528:2.8V, the capacitor: C528;
C527:2.8V, the capacitor: C527;
C530:2.8V, the capacitor: C530;
C505:1.5V, the capacitor: C505.
Change X100,
C100,C101
Check whether the
output voltage of U5
pin3 is 0.58V around
Y
Change U5,C33,L8
Change the
CPU(U100) OK
Change the
FLASH(U903) of the
main module, check
whether it is OK
N
Check whether U5
pin4 has an voltage
of 2.8V around
Y
N
Change U501
N
A
