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BaseBand Part Troubleshooting
4.1 Power On Trouble
•
Trouble Shooting Setup
- Connect PIF-UNION to the phone.
- Set the TI-remote switch at PIF-UNION off.
•
Trouble Shooting Procedure
- Check Battery Voltage
- END_KEY Dome Switch condition
- Check the output voltages of all LDOs.
4. Troubleshooting
END
END
_POWERKEY
Checking Flow
1u
C132
VBUS_USB
1u
C139
2V8_VEXT
1u
2V8_VMEM
C120
2.2u
P1
VINT2
VINTIN
N2
T2
VMEM1
VMEM2
T3
VMEMIN1
P2
R2
VMEMIN2
N16
VMIC
VPLL
G16
VRTC
T7
VRTCIN
R6
T6
VSIM
E15
VUSB
F15
VUSBIN
D16
VVCXO
T5
VBACKSEL
C15
VBAT1
VBAT21
G15
H15
VBAT22
VBAT31
A3
B3
VBAT32
VBAT4
R5
R4
VBAT5
VBATSENSE
B8
A5
VCHG
F16
VCORE
VCOREGATE
E16
VEXT1
A4
B4
VEXT2
N1
VINT1
VABB
H16
T4
VBACK
CHGOSC
B5
GATEDRIVE
A6
IBIAS
T15
A7
ISENSE
B7
CHGDACREF
1u
C128
10u
C117
VBAT
C121
1u
VBAT
4.7u
C127
1u
C116
VCORE VBAT
D
G
S1
S2
S3
S4
S5
VSIM
FDJ129P
Q101
1u
C125
2V75_VTCXO
1V5_VPLL
2.4
R103
C118
1u
VABB
1V8_VINT
1u
C119
2V5_VMIC
VUSB
C122
1u
AD6555 POWER MANAGEMENT SECTION
Z3X-BOX.COM
Summary of Contents for CE500
Page 3: ... 4 Z 3 X B O X C O M ...
Page 77: ...4 TROUBLE SHOOTING 78 5 Check Tx I Q TXQP TXQN TXIN TXIP U704 Test Point Z 3 X B O X C O M ...
Page 85: ...Note 86 Z 3 X B O X C O M ...
Page 93: ... 94 8 PCB LAYOUT Z 3 X B O X C O M ...
Page 94: ... 95 8 PCB LAYOUT Z 3 X B O X C O M ...
Page 95: ... 96 Z 3 X B O X C O M ...
Page 103: ...9 CALIBRATION 104 L Standalone Test Equipment Setup Oscilloscope Z 3 X B O X C O M ...
Page 105: ... 106 Z 3 X B O X C O M ...
Page 127: ...Note 128 Z 3 X B O X C O M ...