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U8850-91 L3-L4 Trouble shooting Guide
Version 0.1
U8851-91
L3-L4 Troubleshooting Guide
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Company Confidential
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U8850-91 L3-L4 Trouble shooting Guide
Date
Version
Comment
Owner
2011-07-21
0.1
First release
Paul Lin
Max Kao
Revision History
Version 0.1
Content
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U8850-91 L3-L4 Trouble shooting Guide
Version 0.1
1 BASEBAND TROUBLE SHOOTING GUIDE….……………..………..…...6
1.1 U8850-91 Baseband: General Description of U8850-91 BB Circuits…..6
1.1.1 U8850-91 system structure introduction…………….……………….….6
1.2 Base-band Test-points…………………….…………………………..….…8
1.3 Can not power on the Phone……………………………………………..10
1.3.1 Causes of “Cannot power on the phone ”……………………………..10
1.3.2 Flow chart for “Cannot power on Phone”……….……….......………..11
1.4 Download Failed….......……………………………………………………..12
1.4.1 Causes of “Download Failed”…………………………………………..12
1.5 SIM Card Detection Error…………………….…………………………….14
1.6 Audio……………………………………………………………………….…15
1.6.1 Headset fail…………….……………………………………….………...15
1.6.2 Speaker fail………………………………………………………………..17
1.6.3 Receiver fail………………………………..………………………..……18
1.6.4 Microphone fail……………….………………………………………….19
1.7 LCD Fault…………………………………………………………………..20
1.7.1 Backlight fail…………….……………………………….…………………20
1.7.2 LCM no display……………….……………………………………………21
1.8 Charger Fault…………………………………………………………………23
1.9 Micro SD Card fault ..……………………………………………………..…24
1.10 Bluetooth / WIFI fault……………………………………………………….25
1.11 Camera fault……………………………………………………………..….28
1.11.1 5M Camera fault…………………………………………………….……28
1.11.2 VGA Camera fault…………………….……………………………….…30
1.12 Vibrator fault…………………………………………………………...……32
2 RF TROUBLE SHOOTING GUIDE ………………………………………… 33
2.1 WCDMA Troubleshooting ……………………………………….………… 33
2.1.1 Operation Channel and Frequency Allocation …………………...…… 33
2.1.2 RF block diagram ……………………………………………………..… 34
2.1.3 WCDMA components/layout …………………………………………… 35
2.1.4 WCDMA test setup ………………………………………………….…… 37
2.1.5 How to set 8960 cable loss ………………………………...…………… 42
2.2 WCDMA Troubleshooting ………………………………………….……… 44
2.3 GSM Troubleshooting ……………………………………………...……… 46
2.3.1 GSM Block …………………………………………………………..…… 46
2.3.2 GSM component locations ……………………………………………… 47
2.3.3 Agilent 8960 setting ……………………………………………………… 49
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2.3.4 GSM Circuit Checking Steps …………………………………………… 60
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Version 0.1
1 BASEBAND TROUBLE SHOOTING GUIDE
1.1 U8850-91 Baseband: General Description of U8850-91 BB Circuits
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U8850-91 L3-L4 Trouble shooting Guide
Version 0.1
1.1.1 U8850-91 system structure introduction
The Base-band circuits mainly consist of 3 chips: QUALCOMM
MSM8255-1, PM8058, QTR8601, SanDisk eMMC memory (SDIN5D2-2G-T)
and Samsung mobile DDR (K4X4G303PC-7GD8) .
QUALCOMM MSM8255-1 (U401) is a chip implementing the digital
Base-band processes of a GSM/GPRS/WCDMA mobile phone and basic
PDA function. Qualcomm MSM8255-1 Smartphone Chipsets family will offer
800MHz to 1GHz CPUs based on the ARM11 instruction set. The CPU used
will be the same Scorpion models found in current Snapdragon chipsets.
Scorpion is 800MHz, Modem ARM11 is 400MHz.
The PM8058 (PU101) integrates all wireless handset power
management, general housekeeping, and user interface support functions
into a single, mixed-signal IC. Its versatile design is suitable for CDMA,
UMTS, or GSM phones, and other wireless products, such as data cards and
PDAs.
The QTR8601 (WQU801) device is a highly integrated and versatile
transceiver IC that can be used in multimode, multiband applications – with
or without Rx diversity. The RF transceiver block integrates advanced
receive and transmit features to simplify handset design, minimize parts
count, and reduce DC power consumption.
QTR8601 features
New features integrated into the QTR8x0x IC, RF transceivers, RF
transmitters, RF receivers, RF transceiver support features, Bluetooth
features, FM radio features, Audio codec features, Touchscreen ADC,
Package features
A specific module is dedicated to support the 1.8V/3V SIM card interface.
The module includes the generation of the SIM card supply voltage as well
as level shifters to adapt the SIM card signal levels to the micro-controller I/O
signal levels.
The PM8058 also includes an on-chip voltage reference; under-voltage
detection and power-on reset circuits.
The SanDisk eMMC memory (SDIN5D2-2G-T) (U1001) is used to store code
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U8850-91 L3-L4 Trouble shooting Guide
Version 0.1
and personal data.
The Samsung mobile DDR (K4X4G303PC-7GD8) is used for temporary data
stack for code running.
Block diagram of U8850-91 system structure
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U8850-91 L3-L4 Trouble shooting Guide
Power source Net Name
Test Point
Voltage
VREG_S0_V1P2
PC104
1.2V
VREG_S1_V1P2
PC106
1.2V
VREG_S2_V1P3
PC101
1.3V
VREG_S3_V1P8
PC113
1.8V
VREG_S4_V2P2
PC118
2.2V
VREG_L1_V1P2
PC129
1.2V
VREG_L5_V2P85
PC131
2.85V
VREG_L8_V1P8
PC132
1.8V
VREG_L9_V2P05
PC133
2.05V
VREG_L10_V2P2
PC134
2.2V
VREG_L13_V2P9
PC135
2.9V
VREG_L14_V2P85
PC136
2.85V
VREG_LCM_VDD_V2P8
PC137
2.8V
VREG_L16_V1P8
PC138
1.8V
VREG_L22_V1P2
PC139
1.2V
VREG_L0_V1P2
PC141
1.2V
VREG_L3_V1P8
PC142
1.8V
VREG_L11_V1P8
PC143
1.8V
VREG_L12_V3
PC144
3.0V
VREG_L17_V1P8
PC145
1.8V
VREG_L18_V2P2
PC146
2.2V
VREG_L19_V1P8
PC147
1.8V
VREG_L20_V2P85
PC148
2.85V
VREG_L21_V1P1
PC149
1.1V
VREG_L24_V1P2
PC150
1.2V
VREG_L25_V1P2
PC151
1.2V
VREG_L6_V3P3
PC153
3.3V
VREG_L7_V1P8
PC154
1.8V
VREG_NCP_V1P8
PC155
1.8V
1.2 Base-band Test-points
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Clock
Net Name
Test Point
Value
WWU1102_OUT.1
37.4MHz
WWR1103
37.4MHz
XTAL_19.2M_OUT
19.2MHz
WQC821
19.2MHz
LPA_XTAL_OUT
24.576MHz
C502
24.576MHz
U8850-91 L3-L4 Trouble shooting Guide
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1.3 Cannot power on the Phone
1.3.1 Causes of “Cannot power on the phone ”
„Phone is dead‟ means that the phone cannot be powered on when
the power has been supplied to the system. Nominal supply voltage to
the phone is 3.6V. If the main supply voltage is lower than 3.2V, the
phone does not start the power-on sequence. The causes of “Phone is
Dead” could be one of the following reasons:
Defective Mechanical Component: Battery connector
Defective PM8058: PU101
Defective QUALCOMM MSM8255-1: U401
Defective 32.768KHz crystal : X1201
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U8850-91 L3-L4 Trouble shooting Guide
1.3.2 Flow chart for “Cannot power on Phone”
Version 0.1
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U8850-91 L3-L4 Trouble shooting Guide
1.4 Download Failed
1.4.1 Causes of “Download Failed”
The causes of Download failed could be one of the following reasons:
Defective CPU, DDR: U401(Qualcomm MSM8255-1), U1401
(Samsung K4X4G303PC-7GD8)
Defective Flash Memory: U1001 (SanDisk eMMC
SDIN5D2-2G-T)
Defective USB connector: CN1201
Version 0.1
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U8850-91 L3-L4 Trouble shooting Guide
Flow chart for “USB Download Failed”
Version 0.1
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U8850-91 L3-L4 Trouble shooting Guide
1.5 SIM Card Detection Error
The SIM interface can be checked tested without a SIM Card. When the phone
is switched on, all interface lines (VDDSIM, SIMRST, SIMCLK, SIMIO) rises,
first to 1.8V then 3V. From checking those responses, it is possible to find errors
in the SIM interface without a SIM Card.
Version 0.1
Test Points of “SIM Detection Error”
Flow chart for “SIM detection Failed”
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U8850-91 L3-L4 Trouble shooting Guide
(All Close to AU201)
Headset
AC216 470nF
AC212
33pF
AC217 470nF
AC218
33pF
AC219
33pF
AL203
BLM15AG121SN1
21
ATP203
ATP202
HPO_L [13]
HPO_R [13]
VREG_L20_V2P85
HP_VDD
HPH_LP[16]
HPI_L
PA_HEADSET_EN[6]
HPH_RN[16]
HPI_R
AC213
33pF_NM
AU201
NCP2811BFCT1G
AGND
A1
SD
A2
INR
B2
VP
B1
INL
B3
CPP
C1
CPM
C3
PGND
C2
PVM
C4
SPVM
B4
OUTL
A4
OUTR
A3
AC214
2.2uF
AC220
1uF
AC215 1uF
AR207 10/+-5%
AR206 10/+-5%
AR205 100K/+-5%
Version 0.1
1.6 Audio
Audio function block diagram
1.6.1 Headset fail
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Flow chart of “Headset receiver fail”
Flow Chart of “Headset microphone fail”
Version 0.1
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U8850-91 L3-L4 Trouble shooting Guide
AL102 BLM15AG121SN1
2 1
SPKIN-
Close to NCP2823
LINE_N
LINE_P SPKIN+
AL103 BLM15AG121SN1
2 1
VO1_N
EAC101
PESD5V0S1BL
1
1
2
2
AC109
22uF_NM
Close to NCP2823
AC107
4.7uF
AC108
4.7uF
V_BAT
EAC102
PESD5V0S1BL
1
1
2
2
Close to Connector
35pF
35pF
VO1_P
ATP101
SPK_EN [6]
AC110 5.6nF
AC111 5.6nF
AR101 68K/+-1%
ATP103
VO1- [13]
VO1+ [13]
AR102 68K/+-1%
Close to NCP2823
AU101
NCP2823AFCT2G
INP
A1
AVDD
B1
INN
C1
AGND
A2
PVDD
B2
EN
C2
VOUTN
A3
PGND
B3
VOUTP
C3
AC113
33pF
AC112
33pF
AC114
33pF
AC115
33pF
LINE_OUT_LP[16]
LINE_OUT_RN[16]
1.6.2 Speaker fail
Flow chart of “Speaker fail”
Version 0.1
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1.6.3 Receiver fail
AC119
33pF_NM
AC118
33pF_NM
ATP104
ATP105
EAROP [13,16]
EARON [13,16]
AC116
33pF
AC117
33pF
EAROP[13,16]
EARON[13,16]
U8850-91 L3-L4 Trouble shooting Guide
Version 0.1
Flow chart of “Receiver fail”
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U8850-91 L3-L4 Trouble shooting Guide
AC123
33pF
AC120 0.1uF
PM8058_1.8V
AC121 0.1uF
AC124
10uF
ACN101
501591-1011
1 2
4
5 6
7
9
3
8
10
11 12
13 14
AC122
33pF
MIC1P+
MIC1N-
APAD101
HSED_BIAS0
MIC1N[16]
MIC1P[16]
1.6.4 Microphone fail
Version 0.1
Flow chart of “Microphone fail”
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U8850-91 L3-L4 Trouble shooting Guide
LED_A_F1
LD1
1PS79SB10
2 1
LED_A_F2
LC7
1uF
LC11
1uF
ELR1201
0/+-1%
LU4
TPS61160DRVR
FB1COMP2GND
3
Thermal Pad
7
SW
4
CTRL
5
VIN
6
VPH_PWR
LED_A
LC5
4.7uF
LCM_PWM[6]
LR2
10R/+-1%
LC6
220nF
LED_C
LL1 22uH
LC4
33pF
LC8
33pF
1.7 LCD Fault
1.7.1 Backlight fail
Version 0.1
Flow chart of “Backlight fail”
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ELC1201
33pF
ELU1202
KNA16150C33MA7TB
IN1
1
NI2
2
IN3
3
IN4
4
OUT1
5
OUT2
6
OUT3
7
OUT4
8
GND1
9
GND2
10
LCDC_VSY NC_F
LCDC_GRN _0_F
LCDC_RED _4[6]
LCDC_BLU_5[6]
LCDC_GRN _3_F
LCDC_RED _5_F
ELU1203
KNA16150C33MA7TB
IN1
1
NI2
2
IN3
3
IN4
4
OUT1
5
OUT2
6
OUT3
7
OUT4
8
GND1
9
GND2
10
LCDC_BLU_3[6]
ELU1204
KNA16150C33MA7TB
IN1
1
NI2
2
IN3
3
IN4
4
OUT1
5
OUT2
6
OUT3
7
OUT4
8
GND1
9
GND2
10
LCDC_RED _3[6]
LCDC_RED _2[6]
LCDC_BLU_0[6]
LCDC_BLU_1[6]
LCDC_RED _0[6]
ELU1205
KNA16150C33MA7TB
IN1
1
NI2
2
IN3
3
IN4
4
OUT1
5
OUT2
6
OUT3
7
OUT4
8
GND1
9
GND2
10
LCDC_RED _1[6]
LCDC_HSY NC[6]
LCDC_GRN _2[6]
LCDC_GRN _4[6]
LCDC_GRN _5[6]
LCDC_GRN _0[6]
LCDC_VSY NC[6]
LCDC_GRN _3[6]
LCDC_GRN _1_F
LCDC_BLU_2[6]
LCDC_RED _5[6]
ELC1202
33pF_NM
LCDC_BLU_5_F
LCDC_BLU_4[6]
LCDC_RED _4_F
LCDC_PCLK[6]
LCDC_ENABLE_F
LCDC_PCLK_F
LCDC_BLU_3_F
LCDC_ENABLE[6]
LCDC_RED _2_F
ELR1204
0/+-5%
ELR1203
0/+-5%
LCDC_RED _3_F
LCDC_GRN _2_F
ELU1201
KNA16150C33MA7TB
IN1
1
NI2
2
IN3
3
IN4
4
OUT1
5
OUT2
6
OUT3
7
OUT4
8
GND1
9
GND2
10
LCDC_BLU_0_F
LCDC_BLU_1_F
LCDC_BLU_2_F
LCDC_RED _1_F
LCDC_RED _0_F
LCDC_GRN _1[6]
LCDC_HSY NC_F
LCDC_BLU_4_F
LCDC_GRN _5_F
LCDC_GRN _4_F
LC10
33pF
LCDC_ENABLE_F
LCDC_PCLK_F
LED_C
LCN1
BM10NB(0.8)-40DS-0.4V(75)
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
13
13
14
14
15
15
16
16
17
17
18
18
19
19
20
20
21
21
22
22
23
23
24
24
25
25
26
26
27
27
28
28
29
29
30
30
31
31
32
32
33
33
34
34
35
35
36
36
37
37
38
38
39
39
40
40
41414242434344
44
LCDC_BLU_5_F
LCDC_BLU_3_F
LCDC_BLU_1_F
LCDC_RED_5_F
LCDC_RED_3_F
LCDC_RED_1_F
LCDC_GRN_5_F
LCDC_GRN_3_F
LCDC_GRN_1_F
SPI_MOSI_DATA [6]
LCM_RST_N
[6]
LCDC_HSYNC_F
LCDC_VSYNC_F
SPI_CS_N
[6]
LCM_ID
[6] Add this net
for LCM ID
detect
VREG_LCM_VDDIO_V1P8
LED_A
SPI_CLK[6]
LC3
2.2uF
LCDC_BLU_2_F
LCDC_BLU_0_F
LCDC_RED_0_F
LCDC_GRN_4_F
LCDC_GRN_2_F
LCDC_GRN_0_F
LCDC_BLU_4_F
LCDC_RED_4_F
LCDC_RED_2_F
LC2
2.2uF
VREG_LCM_VDD_V2P8
LC9
33pF
1.7.2 LCM no display
Version 0.1
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U8850-91 L3-L4 Trouble shooting Guide
Flow chart of “LCM display fail”
Version 0.1
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U8850-91 L3-L4 Trouble shooting Guide
PTP205
1
1
V_BAT
VPH_PWR
USB_VBUS_CONN
PC208
22uF
PC209
22uF
PC210
22uF
PC203
4.7uF_NM
PC207
4.7uF
PU202
NIS1050MNTBG
GND
4
VOUT
5
VIN3VIN
7D6D8
G
2S1
PC211
22uF
PC219
22uF
OVP_CLAMP
BAT_FET_NBAT_FET_NBAT_FET_NBAT_FET_N
PC210 Close to PMIC
VMAX=(Program 5.5V~6V)
PB201 600R
PQ201
AON4421
D
1
D
2
D
3
D
6
D
5
G
4
D
7
S
8
OVP_CLAMP
PC204
3.3nF
VREF_THERM
BAT_FET_N
NPTP202
PR203
20K/+-5%
VCHG
OVP_CTL
PC202
22pF
VCHG
PMIC_COIN
OVP/
Charger
PU101B
PM-8058-0-191NSP-TR-00
OVP_SNS
N13
OVP_CTL
M13
OVP_CLAMP
N12
VCHG
R10
VCHG
T10
VPH_PWR
R12
VPH_PWR
T12
BAT_FET_N
R7
VBAT
R8
VCOIN
R5
VREF_THERM
M12
GND
K7
GND
K10
GND
G9
GND
H8
GND
H9
GND
H10
GND
J7
GND
J8
GND
J9
GND
K8
GND
K9
GND
J10
1.8 Charging Fault
Charger-in used for indicate the charger was plugged in.
Version 0.1
Flow chart of “Charging fail”
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U8850-91 L3-L4 Trouble shooting Guide
C1310
0.1uF
uSD_SDC4_CLK[4]
EC1301
33pF_NM
EU1301
KNA16150C33MA7TB
IN1
1
NI2
2
IN3
3
IN4
4
OUT1
5
OUT2
6
OUT3
7
OUT4
8
GND1
9
GND2
10
uSD_SDC4_DAT2[4]
uSD_SDC4_DAT3_CN
uSD_SDC4_DAT0[4]
uSD_SDC4_DAT1[4] uSD_SDC4_DAT1_CN
uSD_SDC4_DAT2_CN
uSD_SDC4_DAT3[4]
uSD_SDC4_DAT0_CN
EC1302
33pF_NM
ER1301 0/+-5%
ER1302 0/+-5%
CN1302
502426-1410
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
13
13
14
14
15
15
16
16
17
17
18
18
uSD_SDC4_CMD [4]
VREG_SD_V2P85
uSD_SDC4_DAT2_CN
uSD_SDC4_DAT0_CN
uSD_SDC4_DAT3_CN
uSD_SDC4_DAT1_CN
1.9 Micro SD Card fault
Version 0.1
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U8850-91 L3-L4 Trouble shooting Guide
Flow chart of “Micro SD fail”
Version 0.1
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U8850-91 L3-L4 Trouble shooting Guide
GPIO169
WWC1114
27pF
GPIO146
GPIO168
GPIO147
GPIO170
*32.768K level must below 1.8V
avoid additional current
consumption and degradation in FM SNR
filter
the noise
GPIO145
WWR1104
100K/+-0.5%
WiFi I/O
Bluetooth I/O
WLAN_WAKE
HOST_WAKE
BT_WAKE
HOST_WAKE
32.768K CLK
37.4M CLK
Clock&Control
WiFi&BT ANT
FM ANT
FM I/O
Internal
regulator
Power
GND
1.8/3.3V
1.8/2.6/3.3V
2.8~5V
WM-BN-BM-02 (11b/g/n+BT 2.1 EDR+FM T/RX)
WWU1101 WM-BN-BM-02
SDIO_D0
26
SDIO_D1
22
SDIO_D2
24
SDIO_D3
21
SDIO_CMD
23
SDIO_CLK
25
WL_RST_N
19
WL_GPIO0
18
WL_GPIO1
20
BT_UART_RTS_N
7
BT_UART_CTS_N
8
BT_UART_RXD
5
BT_UART_TXD
6
BT_PCM_IN
2
BT_PCM_OUT
4
BT_PCM_SYNC
3
BT_PCM_CLK
1
BT_RST_N
10
BT_GPIO0
9
BT_GPIO1
11
WRF_EXTREFIN
16
X1
49
X2
48
WL_BT_REG_ON
12
XTAL_PU
29
SPI/SDI O
63
RF_ANT
14
FM_TXP
53
FM_RXP
51
FM_RXN
52
FM_ADIO_OUT_R
44
FM_ADIO_OUT_L
43
FM_TX_ADIO_R
46
FM_TX_ADIO_L
45
VIN_1P2LDO_L
41
VIN_1P2LDO
42
VDD_FM_OUT
30
VDD_FM_IN
31
VDD_COR E_OUT
33
VDD_COR E_IN
32
VDD_RAD IO_PLL_OUT
35
VDD_RAD IO_PLL_IN
34
VDD_PA_OUT
37
VDD_PA_IN
36
SR_AVDD2P5
38
VDDIO
27
VDDIO_SD
28
VBAT1
39
VBAT2
40
GND113GND215GND317GND447GND550GND654GND755GND856GND957GND1058GND1159GND1260GND1361GND14
62
WWC1122
18pF
WWU1102
37.4MHz
IN
1
GND
2
OUT
3
GND
4
WWC1119
33pF
WWR1105
4.7K/+-1%
WWR1103 0R/+-1%
WLAN_SDI O_CLK[4]
WLAN_SDI O_CMD[4]
WLAN_SDI O_DATA1[4]
WLAN_SDI O_DATA2[4]
WLAN_SDI O_DATA3[4]
WLAN_WAKEU P[6]
WLAN_RST_N[5]
WLAN_SDI O_DATA0[4]
QTR_BT_UART_RXD[6]
QTR_BT_UART_RTS[6]
QTR_BT_UART_CTS[6]
WLAN_IR Q[5]
QTR_BT_PCM_SYNC[6]
QTR_BT_PCM_DIN[6]
QTR_BT_UART_TXD[6]
BT_RST_N[5]
QTR_BT_PCM_DOUT[6]
QTR_BT_PCM_BCLK[6]
SLEEP_CLK[5]
BT_IRQ[5]
BT_WAKEUP[6]
WLAN_BT_REG_ON[6]
GPIO144
*SPI/SDIO option:
VDDIO -> SPI
GND -> SDIO
MSM
MSM
MSM clock buffer
MSM
MSM
WWU110 1_SPI.1
1.10 Bluetooth / WIFI fault
Version 0.1
Flow chart of “Bluetooth / WIFI fail”
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Page 28
CN1301
AXE570124
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9910
10
111112
12
131314
14
151516
16
171718
18
191920
20
212122
22
232324
24
252526
26
272728
28
292930
30
313132
32
333334
34
353536
36
373738
38
393940
40
414142
42
434344
44
454546
46
474748
48
494950
50
515152
52
535354
54
555556
56
575758
58
595960
60
616162
62
636364
64
656566
66
676768
68
696970
70
717172
72
737374
74
C1305
2.2uF
C1302
100nF
AC129
33pF
C1307
100nF
AC130
33pF
NTP1305
NTP1303
AC131
33pF
NTP1302
NTP1301
NTP1304
VREG_CAM_V2P8
VREG_L16_V1P8
VREG_S3_V1P8
VREG_L12_V3
Flash_5V
VPH_PWR
VREG_L14_V2P85
FLOUT[17]
PTT_DET[6]
VIB_DRV_N[21]
CAM_VSYNC[6]
CAM_HSYNC[6]
CAM_MCLK[6]
HS_DETECT_N[6]
CAM_DATA4[6]
CAM_I2C_SDA[6]
CAM_I2C_SCL[6]
CAM_DATA7[6]
CAM_DATA6[6]
CAM_DATA5[6]
KEY_PWR_ON_N[21]
KEY_VOL_DOWN[21]
KEY_VOL_UP[21]
EMIC_1 [15]
FM_ANT [30]
EXT_GPS_LNA_SEL [5]
CAM_DATA9 [6]
CAM_DATA10 [6]
CAM_DATA11 [6]
EMIC_GND [15]
VO1- [14]
VO1+ [14]
CAM_DATA8 [6]
CAM_5M_PWDN [6]
CAM_RST_N [6]
CAM_VGA_PWDN [6]
HPO_L [15]
HPO_R [15]
CAM_PCLK [6]
EAROP [14,16]
EARON [14,16]
HSED_BIAS1_ST_A_1 [15]
I2C_SDA[6,11,20]
I2C_SCL[6,11,20]
ALPS_INT_N[4]
C1301
100nF
AC128
33pF
MODULE_ID[6]
C1303
100nF
ECU101
NFA18SL307V1A45L
GND
1
IN(OUT)
3
GND
2
IN(OUT)
4
IN(OUT)
5
IN(OUT)
6
OUT(IN)
7
OUT(IN)
8
OUT(IN)
9
OUT(IN)
10
CAM_DATA10 [2]
CAM_DATA11 [2]
CAM_DATA8 [2]
CAM_DATA9 [2]CAM_DATA9_F
CAM_DATA10_F
CAM_DATA11_F
CAM_DATA8_F
ECC101
33pF
/N
ECC102
33pF
ECC103
33pF
ECC105
33pF
/N
/N
/N
ECR101
0/+-5%
ECU102
NFA18SL307V1A45L
GND
1
IN(OUT)
3
GND
2
IN(OUT)
4
IN(OUT)
5
IN(OUT)
6
OUT(IN)
7
OUT(IN)
8
OUT(IN)
9
OUT(IN)
10
CAM_DATA7 [2]
CAM_PCLK_F
CAM_MCLK[2]
CAM_PCLK[2]
CAM_MCLK_F
CAM_DATA6 [2]
ECR102
0/+-5%
CAM_DATA5 [2]
CAM_DATA4 [2]
CAM_DATA7_F
CAM_DATA6_F
CAM_DATA5_F
CAM_DATA4_F
1.11 Camera fault
1.11.1 5M Camera fault
U8850-91 L3-L4 Trouble shooting Guide
Version 0.1
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U8850-91 L3-L4 Trouble shooting Guide
Flow chart of “5M Camera fail”
Version 0.1
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CAM_VGA_PWDN
[2]
CC109
0.1uF
CAM_MCLK_F
CAM_PCLK_F
CAM_I2C_SDA[2]
CAM_DATA7_F
VREG_CAM_V2P8
VREG_L16_V1P8
CAM_DATA11_F
CU101
66-A02F-TW10010
PWRDN
A1
AVDD
A2
NC
A4
SDA
B1
SCLB2Y0B3Y1B4HSYNCC1VSYNC
C2
GND
C3
Y2
C4
PCLK
D1
MCLK
D2
Y5
D3
Y3D4Y7E1Y6E2Y4
E3
IOVDD
E4
NC
A3
CAM_I2C_SCL[2]
CAM_DATA10_F
/N
CAM_DATA8_F
CAM_DATA9_F
CAM_DATA6_F
CAM_HSYNC
[2]
CAM_DATA5_F
CAM_DATA4_F
CAM_VSYNC [2]
1.11.2 VGA Camera fault
Version 0.1
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Flow chart of “VGA Camera fail”
Version 0.1
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U8850-91 L3-L4 Trouble shooting Guide
VIB_P
ER304
0/+-5%
VIB_N
EC307
33pF
/N
ER305
0/+-5%
VPH_PWR
EC306
33pF
D302
PMEG4010BEA
1 2
/N
VIB_DRV_N[2]
PAD301
*VIB PAD 2.5_3.4*
1
1
2
2
1.12 Vibrator fault
Flow chart of “Vibrator fail”
Version 0.1
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U8850-91 L3-L4 Trouble shooting Guide
TX
RX
Band I (IMT)
Channel
Frequency
Channel
Frequency
9612 (Lowest)
1922.4 MHz
10562 (Lowest)
2112.4 MHz
………
………
………
………
9750 (Middle)
1950 MHz
10700 (Middle)
2140 MHz
………
………
………
………
9888 (Highest)
1977.6 MHz
10838 (Highest)
2167.6 MHz
Band II (PCS)
Channel
Frequency
Channel
Frequency
9262 (Lowest)
1852.4 MHz
9662 (Lowest)
1932.4 MHz
………
………
………
………
9400 (Middle)
1880 MHz
9800 (Middle)
1960 MHz
………
………
………
………
9538 (Highest)
1907.6 MHz
9938 (Highest)
1987.6 MHz
Band XI (Japan)
Channel
Frequency
Channel
Frequency
3487 (Lowest)
1430.4 MHz
3712 (Lowest)
1478.4 MHz
………
………
………
………
3525 (Middle)
1438 MHz
3587 (Middle)
1486 MHz
………
………
………
………
3587 (Highest)
1450.4MHz
3812 (Highest)
1498.4 MHz
Band V (850)
Channel
Frequency
Channel
Frequency
4132 (Lowest)
826.4 MHz
4357 (Lowest)
871.4 MHz
………
………
………
………
4182 (Middle)
836.4 MHz
4407 (Middle)
881.4 MHz
………
………
………
………
4233 (Highest)
846.6 MHz
4458 (Highest)
891.6 MHz
Band VIII (900)
Channel
Frequency
Channel
Frequency
2712 (Lowest)
882.4 MHz
2937 (Lowest)
927.4 MHz
………
………
………
………
2788 (Middle)
897.6 MHz
3013 (Middle)
942.6 MHz
………
………
………
………
2863 (Highest)
912.6 MHz
3088 (Highest)
957.6 MHz
2 RF TROUBLE SHOOTING GUIDE
2.1 WCDMA Troubleshooting
2.1.1 Operation Channel and Frequency Allocation
Version 0.1
Note :
1. SF8 supports WCDMA Band I, Band XI,
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U8850-91 L3-L4 Trouble shooting Guide
GSM Band I
ANT
Antenna SW
Page W01
SKY13362-389LF
GSM/EDGE
PA
Page WC06
PAM
Duplexer
GSM/EDGE
WCDMA
GSM TX
GSM RX
BC1 T/RX
BC11 T/RX
Duplexer PAM
GSM RX SAW
WCDMA/GSM
Tx/Rx
Page W08&09&10
QTR8601
BandXI
ANT
2.1.2 RF block diagram
Version 0.1
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U8850-91 L3-L4 Trouble shooting Guide
WQU801A
QTR8601 RF IC
WQCN101
RF connector for GSM/WCDMAI
WQCN102
RF connector WCDMA XI
WQSW101
T/R switch module
WQD201
BI(IMT) Duplexer
WQPA201
BI(IMT) PA
WQFL201
BI(IMT) TX SAW filter
WQD401
BXI Duplexer
WQPA401
BXI PA
WQFL401
BXI TX SAW filter
PU101
RF Power IC
U401
Baseband IC
2.1.3 WCDMA components/layout
WCDMA main components
Version 0.1
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Version 0.1
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U8850-91 L3-L4 Trouble shooting Guide
Version 0.1
2.1.4 WCDMA test setup
a. Please turn on the phone and connect WQCN101,WQCN102 and 8960 by RF
cable.
b. Establish a WCDMA signaling call
1. Press "Operation Mode" button and select "Active Cell".
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2. Turn "Call Parms" to page "2 of 3" and set "RLC Reestablish" to "off".
Version 0.1
3. Default BS downlink power can be set in page "1 of 3". Of course, it can be
adjusted after call is established.
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Version 0.1
4. Default UE uplink power can be set in page "3 of 3". Of course, it also can be
adjusted after call is established.
5. Turn on the device, wait UE to finish the registration. Press "Originate Call", UE
and BS will try establishing the call, and then message below will temporarily show
"SETUP".
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Version 0.1
6. Finally, shows "Connected", it means call has been established successfully. If
want end the call, just press "End Call".
7. After call is established, press "Measurement Selection" and a screen will pop
out as below.
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Version 0.1
8. Select "Channel Power" for output power measurement. Set "UE Target Power"
in "Call Parms" page "3 of 3" to 28 dBm for Max. output power measurement.
9. Select "Lookback BER" for BER measurement. Set "Cell Power" in "Call Parms"
page "1 of 3" for reference sensitivity measurement.
Also, you can try to select other measurements if necessary.
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Version 0.1
2.1.5 How to set 8960 cable loss
1. Press "SYSTEM CONFIG" button, screen will then show as below, press "RF
IN/OUT Amptd Offset" button.
2. After pressing "RF IN/OUT Amptd Offset" button, screen will show as below,
then press "RF IN/OUT Amptd Offset Setup".
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Version 0.1
3. After finishing the steps above, a small screen will pop out as shown below,
By changing Frequency and Offset to setup wanted cable loss on different
frequency.
Note :
Remember to set "RF In/Out Amplitude Offset State" "On" to ensure the setting of
cable loss functioning.
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U8850-91 L3-L4 Trouble shooting Guide
Check the solder of WQU801A and surroundings
Check basic voltage,
VREG_S2_V1P3,VREG_S4_V2P2,VREG_S2_V1P3 ,And
VREG_S3_V1P8.
Setup WCDMA test(8960 Ch10562 for downlink
9750 for uplink), set TX power=24dBm
Using spectrum and frequency probe to cHeck if
WQC228, WQC402 about -5~5dBm
Check if there‟s power at WQC226 ,WQC418 about -5~5
dBm
Yes
No
Check if there‟s power at WQL214 WQC417 about
28~30 dBm
Check if WQR407,WQC223 voltage pull high
Yes
No
WQPA201 WQPA401 poor solder, polarity
error, or NG.
Yes
Check if there‟s power at WQC216 WQC419 about
10~24 dBm
Yes
WQCN101 WQCN102 is poor solder, polarity error or NG
Yes
No
checking WQC106 WQC106 WQC105 WQC104
WQC103 thr voltage is correct
Check WXO801 if have 19.2MHz clock
Check PMIC
PU101E
No
No
1. WQU801A poor solder or NG
2. PCB trace breaks
No
1. WQFL201 ,WQFL401 poor
solder or NG
2. PCB trace breaks
1. WQD201;WQD401 poor
solder or NG
2. PCB trace breaks
Check if there‟s power at WQC107 WQC108 about
10~24 dBm
Yes
No
1. WQSW101 poor solder or NG
2. PCB trace breaks
Yes
Make call with 8960
2.2 WCDMA Troubleshooting
WCDMA BI (IMT) TX WCDMA XI TX
Version 0.1
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U8850-91 L3-L4 Trouble shooting Guide
Check the solder of U2801 and surroundings
Set Band I RX
Check if there‟s power at C2111 pin1 about -21~-29 dBm
Check if there‟s power at C2202/C2207 about -22~-35
dBm
Check if there‟s power at C2215 about -22~-30 dBm
U2201 is poor solder, polarity error or NG
CON2101 is poor solder, polarity error or NG
1. Check if R2101=2.8V
2. check R2102 R2103 R2106 R2107 solder
U2101 poor solder, polarity error, or NG.
Set Agilent 8960, channel=10562, Cell
Power=-20dBm
No
Yes
No
Yes
Yes
No
Yes
Check basic voltage, R3105/R3104/R3103/R3102=1.3V,
R3101/R3111=1.8V, R3109=2.2V, R2101=2.8V
Check U801
No
U2801 is poor solder, polarity error or NG
Make call with 8960
WCDMA BI (IMT) RX
Version 0.1
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U8850-91 L3-L4 Trouble shooting Guide
Antenna SW
WQSW101
GSM/EDGE
PA
GSM TX LB
GSM RX LB
GSM RX SAW
900
WCDMA/GSM
Tx/Rx
QTR8601
GSM 850 RX
GSM TX HB
GSM RX SAW
1800/1900
2.3 GSM Troubleshooting
2.3.1 GSM Block
Version 0.1
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U8850-91 L3-L4 Trouble shooting Guide
No
Ref Name
Function Description
1
U2601
GSM PA 2 U2801
QTR8200
3
U2101
Antenna switch module
4
U2103
GSM HB SAW
5
U2102
GSM 850 SAW
6
U2402
GSM EGSM RX SAW (same component with WCDMA B8 duplexer)
7
X801
XO for PM8058
Location
Description
Location
Description
C2802, R2803
Main Clock from PM8058
C2103, C2102
R2101
VDD for antenna switch
module
C2607, C2606
C2608
GSM DCS/PCS PA output
matching circuit
R2107, R2103
R2102, R2106
Antenna switch module
logic circuit
C2616, C2615
C2617
GSM GSM850/EGSM PA
output matching circuit
L2104, C2116,
C2115, L2106
GSM HB RX matching
circuit
2.3.2 GSM component locations
Version 0.1
Main Chip
Other Function
Fig. 1.1 GSM components of SF8
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U8850-91 L3-L4 Trouble shooting Guide
C2119, C2117
C2601, C2602,
R2604, R2601
GSM DCS/PCS PA input
matching circuit
C2416, C2415
C2412, C2405
L2403, L2404
L2405
GSM EGSM RX matching
circuit(same trace with
WCDMA B8 duplexer)
C2619, C2618
R2605, R2602
GSM GSM850/EGSM PA
input matching circuit
C2108, L2105
L2103, L2102
GSM GSM850 RX matching
circuit
C2611, C2612
PA Gain Mode
R2104, L2107,
R2105, C2114
Matching circuit between
CON2101 and SP2103
C2614, C2609
C2613, C2604
C2603
Vbatt for GSM PA
L2108, C2111,
L2101
Antenna switch module
output matching circuit
R3105, R3104
VREG_S2_V1P3 for
QTR8200
R3109
VREG_S4_2P2 for
QTR8200
R3101
VREG_S3_1P8 for
QTR8200
R3111
VREG_USBPHY_V1P8 for
QTR8200
Version 0.1
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U8850-91 L3-L4 Trouble shooting Guide
2.3.3 Agilent 8960 setting
Version 0.1
Agilent 8960
1.SYSTEM CONFIG 2.CELL SETUP 3. MEASURRMRNT
4.MEASURRMRNT RESET 5.CONTINUOUS ALL 6. Measurement Selection
GSM initial picture
If the initial picture of Agilent 8960 wasn‟t the picture, please follow steps of below
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U8850-91 L3-L4 Trouble shooting Guide
Version 0.1
Press the “SYSTEM CONFIG” button to change this picture, and choose the
“Application Selection”
Press the “Application Switch”; choose the “GSM/GPRS Mobile Test” to change
GSM testing
Note: don’t be mind the License number
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Version 0.1
After system initiation
Cable loss setting
Press the “SYSTEM CONFIG” button, and select the ”RF IN/OUT Amptd offset”
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U8850-91 L3-L4 Trouble shooting Guide
Version 0.1
Press the “RF IN/OUT Amptd offset Setup” button, and setting the cable loss as
this picture
TX Mode Agilent 8960 Setting
Press the “CELL SETUP” button, and select the “Active Cell” to “GSM BCH+TCH”
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U8850-91 L3-L4 Trouble shooting Guide
Version 0.1
Press the “TCH Parameters” button to setting Band, Channel, and MS TX Level
Press the “Traffic Band” button to select the GSM band
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U8850-91 L3-L4 Trouble shooting Guide
Version 0.1
Press the “Traffic Channel” button to select the channel number
Press the “MS TX Level” button to select the control power level; GSM850/900 set
the “5”, DCS/PCS set the “0”
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U8850-91 L3-L4 Trouble shooting Guide
Version 0.1
Press the “Measurement Selection” button choose the “Transmit Power”
When the output power can‟t be measured, try to change the “MS TX Level”; that
can help check the condition of RF section
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U8850-91 L3-L4 Trouble shooting Guide
Band Group
ARFCN
TX freq(MHz)
MS TX Level
Expected power (dBm)
GSM850
128
824.2
5
32.5±1
192
837
251
848.8
GSM900
975
880.2
5
32±1
62
902.4
124
914.8
DCS1800
512
1710.2
0
30±1
699
1747.4
885
1784.8
PCS1900
512
1850.2
0
30±1
661
1880
810
1909.8
Version 0.1
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U8850-91 L3-L4 Trouble shooting Guide
RX Mode Agilent 8960 Setting
Version 0.1
Press the “CELL SETUP” button, and select the “CW” to “GSM BCH+TCH”
CW mode cell setup screen picture
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U8850-91 L3-L4 Trouble shooting Guide
Version 0.1
Press the “Cell Power” button to setting Agilent 8960 output power
Press the “RF Gen Freq” button to setting Rx frequency
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U8850-91 L3-L4 Trouble shooting Guide
Band Group
ARFCN
TX freq(MHz)
TX freq(MHz)
GSM850
128
824.2
869.2
192
837
882
251
848.8
893.8
GSM900
975
880.2
925.5
62
902.4
947.4
124
914.8
959.8
DCS1800
512
1710.2
1805.2
699
1747.6
1842.6
885
1784.8
1879.8
PCS1900
512
1850.2
1930.2
661
1880
1960
810
1909.8
1989.8
Version 0.1
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Check the solder of U2801 and surroundings
Check basic voltage, R3105/R3104/R3103/R3102=1.3V,
R3101/R3111=1.8V, R3109=2.2V, R2101=2.8V
Setup phone to GSM model( channel 190 for
GSM850 ,channel 37 for EGSM) and transmit
power with QRCT
Using spectrum and frequency probe to check if
C2618 ,R2605 about -5~10dBm
Check if there‟s power at C2615 about 10~30 dBm
Check C2603=3.8V
Yes
No
U2601 poor solder, polarity error, or NG.
Yes
CON2101 is poor solder, polarity error or NG
Yes
check R2102 R2103 R2106 R2107 solder
Check C2802 if have 19.2MHz
Check U801
No
No
1. U2801 poor solder or NG
2. PCB trace breaks
No
Check if there‟s power at C2111 about 10~30 dBm
Yes
No
1. U2101 poor solder or NG
2. PCB trace breaks
Yes
2.3.4 GSM Circuit Checking Steps
900 TX
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Page 61
U8850-91 L3-L4 Trouble shooting Guide
Check the solder of U2801 and surroundings
Check basic voltage, R3105/R3104/R3103/R3102=1.3V,
R3101/R3111=1.8V, R3109=2.2V, R2101=2.8V
Setup phone to GSM model( channel 700 for
DCS1800 ,channel 661 for PCS1900) and
transmit power with QRCT
Using spectrum and frequency probe to check if
C2602 ,R2604 about -5~10dBm
Check if there‟s power at C2606 about 10~30 dBm
Check C2603=3.8V
Yes
No
U2601 poor solder, polarity error, or NG.
Yes
CON2101 is poor solder, polarity error or NG
Yes
check R2102 R2103 R2106 R2107 solder
Check C2802 if have 19.2MHz
Check U801
No
No
1. U2801 poor solder or NG
2. PCB trace breaks
No
Check if there‟s power at C2111 about 10~30 dBm
Yes
No
1. U2101 poor solder or NG
2. PCB trace breaks
Yes
GSM 1800/1900 TX
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GSM 900 RX
Check the solder of U2801 and surroundings
Set phone to GSM RX model
Check if there‟s power at C2111 pin1 about -21~-29 dBm
Check if there‟s power at C2405/C2412/L2404/L2405
about -22~-35 dBm
Check if there‟s power at C2415 about -22~-30 dBm
U2402 is poor solder, polarity error or NG
CON2101 is poor solder, polarity error or NG
1. Check if R2101=2.8V
2. check R2102 R2103 R2106 R2107 solder
U2101 poor solder, polarity error, or NG.
Set Agilent 8960, channel=37,
Cell Power=-20dBm, and set DUT in
RX with QRCT
No
Yes
No
Yes
Yes
No
Yes
Check basic voltage, R3105/R3104/R3103/R3102=1.3V,
R3101/R3111=1.8V, R3109=2.2V, R2101=2.8V
Check U801
No
U2801 is poor solder, polarity error or NG
U8850-91 L3-L4 Trouble shooting Guide
Version 0.1
GSM1800/1900 RX
Company Confidential 62/63
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Page 63
U8850-91 L3-L4 Trouble shooting Guide
Check the solder of U2801 and surroundings
Set phone to GSM RX model
Check if there‟s power at C2111 pin1 about -21~-29 dBm
Check if there‟s power at C2119/C2117 about -22~-35
dBm
Check if there‟s power at C2215 about -22~-30 dBm
U2203 is poor solder, polarity error or NG
CON2101 is poor solder, polarity error or NG
1. Check if R2101=2.8V
2. check R2102 R2103 R2106 R2107 solder
U2101 poor solder, polarity error, or NG.
Set Agilent 8960, channel=700 for DCS1800 ,
channel=661 for PCS1900, Cell Power=-20dBm,
and set DUT in RX with QRCT
No
Yes
No
Yes
Yes
No
Yes
Check basic voltage, R3105/R3104/R3103/R3102=1.3V,
R3101/R3111=1.8V, R3109=2.2V, R2101=2.8V
Check U801
No
U2801 is poor solder, polarity error or NG
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