Service Manual

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9LWHOFRP0REL O H7HFKQRORJ\6$  3URSULHWDU\DQG&RQILGHQWLDO  - 20 - 
V
V
I
I
T
T
E
E
L
L
C
C
O
O
M
M
M
M
O
O
B
B
I
I
L
L
E
E
T
T
E
E
C
C
H
H
N
N
O
O
L
L
O
O
G
G
Y
Y
S
S
.
.
A
A
.
.
 VCTCXO Activated
When the power is fed to the VCTCXO(U104), it generates 19.68MHz to be used for the MPU clock.
 Reset Pulses Generated
a) The reset pulse is generated with U6 when it is feed with the power.
b) The reset pulse (RESOUT/) for the MCP is generated with MSM(U125) right after the item a).
c) The reset pulse (RESOUT/) for the LCD is generated with MSM(U125)
 MSM(U125) Starts
Based on the reset pulse a), the MSM(U125) starts to operate including accesses to the Flash ROM and
SRAM (U113). The watchdog timer operates repeatedly.
 Phone Wakes Up
Under control of the MSM(U125), the phone displays a wake-up animation, turn the backlight on and
sounds a melody.