Debug Guide; Baseband Circuit Debug Guide; Phone Is Dead - Motorola C168 Manual

1. Debug guide

1.1 Baseband circuit Debug guide

1.1.1 Phone is Dead

The phone is dead
Voltage at C620 =3.6V
Yes
Voltage at
C210=3.6V
C215=1.5V(VRRTC)
TP211=1.5V(RESPWON)
Yes
Clock at TP210
=~ 32.768KHz
Yes
Press PWON and then we
can detect falling edge at
TP207
Voltage at
C213=1.8V(VRRAM)
C212=1.8V(VRMEM)
C217=1.5V(VRDBB)
C211=2.8V(VRIO)
C216=2.8V(VRABB)
Yes
Clock at C201
= 26M Hz
Yes
See section
"Download Failed"
NO
Contact problem
NO
Defective IOTA (U202) or
NO
Check R205 whether
32768Hz is available
NO
Defective IOTA (U202 ) or PCB
NO
Check status of Pin3 of
U601 is high (TCXOEN).
Faulting Finding Chart of "Phone is Dead"
PCB
NO
Yes
Defective Calypso (U201),
X201 or PCB
Defective CALYPSO
(U201) or PCB
Please refer to RF part
3