Motorola MOTOSURF A3100 User manual

Service Engineeing & Optimization
Level 3 , Rev.1.0
A3100 Troubleshooting
A3100 Troubleshooting
Guide
Guide

Service Engineeing & Optimization
Level 3 , Rev.1.0
Agenda
A. Cannot Power On
B. SIM Card Not Found
C. Display Abnormal
D. No Keypad Backlight
E. No LCM Backlight
F. Flash Light No Function
G. Light Sensor No Function
H. Cannot Charge
I. Keypad No Function
J. Touch No Function
K. Jog Ball No Function
L. Can’t Access MicroSD Card
M. Vibrator Out of Control
N. ActiveSync No Function
O. Earphone Malfunction
P. Microphone Malfunction
Q. Receiver No Key Tone
R. Speaker No Function
S. RTC failed
T. Can’t Take Picture
U. Phone Hang Up
V. Auto Power On
W. Auto Power Off
X. Cannot Call Out
Y. WIFI Can’t Turn On and Test
Z. BT Can’t Turn On and Test

Service Engineeing & Optimization
Level 3 , Rev.1.0
Can’t Power On (1)
1. Check the voltage of the Battery
Vbat (TP170) > 3.8V
2. Check the battery connector J2
Vbat (J2)
Vbat (TP170)
N_KB_PWR_KE
Y

Service Engineeing & Optimization
Level 3 , Rev.1.0
Can’t Power On (2)
3.Check the voltage of R79
R79 > 3.4V
4. Check the power-on key path
N_KB_PWR_KEY (TP165) > 2.6V
If N_KB_PWR_KEY is low, the unit will power on.
> 3.4 V
> 2.4 V

Service Engineeing & Optimization
Level 3 , Rev.1.0
Can’t Power On (3)
5. Check PM7540(U2) regulator voltage
A. VREG_MSMC1_1.2V on C4923
B. VREG_MSMC2_1.2V on C4924
C. VREG_MSME_1.8V on C4925
D.VREG_MSME2_2.8V on C4921
E. VREG_MSMP_2.6V on C4912
F. VREG_MSMA_2.6V on C4906
AB
C
F
E
D

Service Engineeing & Optimization
Level 3 , Rev.1.0
Can’t Power On (4)
6. Check Power On Sequence
After the voltage rails are brought up, PON_RST_N is asserted by
PM7540 IC, and then the MSM7200A IC asserts PS_HOLD signal.
–PS_HOLD should be high after power on (on D522)

Service Engineeing & Optimization
Level 3 , Rev.1.0
Can’t Power On (5)
7. Try to check the external DDR and Nand Flash
1. External DDR check _ Check the External DDR by ram test tool
Pass=> The External DDR is workable
Fail => a) MSM7201A can find the memory
b) U3 is damaged
2. Flash check _ Dump the image from the damaged unit
Pass=> The External flash is workable
Fail => a) MSM7201A can find the flash
b) U3 is damaged
8. Redownload the SW
Try to redownload the SW if the main code image is damaged

Service Engineeing & Optimization
Level 3 , Rev.1.0
SIM Card Not Found
R249
10K 0201
2 1
J17
217-02000-04 6PIN 2.1H ACT
VCC
1
RST
2
CLK
3
GND
4
NC
5
I/O
6
Fix
7
Fix
8
Fix 9
Fix 10
Fix 11
Fix 12
C296
33pF 0201 C297 33pF 0201
UIM1_RESET
UIM1_CLK
USIM SLOT
UIM1_P_CLK12
VREG_UIM1
R247
0R 0201
21
UIM1_P_RESET12
C288 1uF C289 33pF
R245
0R 0201
2 1
C239
33pF 0201
R246
0R 0201
2 1
UIM1_P_DATA12 UIM1_DATA
VREG_UIM1
1. Do the clean boot (Mater Clear)
2. Exam whether the contact between SIM and connector is ok
3. Check the Signal of SIM interface (VCC, RST ,and Clock)
USIM ,VCC =1.8V ; SIM= 1.8V / 2.85V
4. If the signal is abnormal ,please check U2.

Service Engineeing & Optimization
Level 3 , Rev.1.0
Display Abnormal
• White screen:
• Check LCM damage or not
• Check EMI filter (U4721) SMT
• Check panel voltage VDD 2.8V(C4921_1) & VDDIO 2.6V(C4918_1)

Service Engineeing & Optimization
Level 3 , Rev.1.0
No Keypad Light
• Check keypad LED voltage VREG_5V(C259 pin2)
• Check LED damage or not

Service Engineeing & Optimization
Level 3 , Rev.1.0
No LCM backlight
•No backlight:
1. LCM backlight damage
2. Measure R54 voltage: 15V
3. Backlight enable GPIO(Q1_2) pulled high 2.6V

Service Engineeing & Optimization
Level 3 , Rev.1.0
Flash Light No Function
•Can’t turn on flash light:
1. Check flash LED (D523) SMT and damage or not
2. Check D523_pin1 voltage: 5V
3. R425_1 & R426_1 & R427_1 pulled to low when turn on flash
led.

Service Engineeing & Optimization
Level 3 , Rev.1.0
Light Sensor No Function
– Check U39_2 voltage: 2.8V
– Check R685_1 signal pulled to low
– Measuring Vout voltage (U39_4) was change or not when light sensor
putting on different Lux environment.

Service Engineeing & Optimization
Level 3 , Rev.1.0
Cannot Charge (1)
1. Check the battery and the charger ; Only support BT-60 battery
2. Dial #06# to check the Charging status and the charging type
Power Source should be USB or Charger
Battery ID : Readable
If Power source is “No external power”, please check the charging path
VBUS > 4.7V

Service Engineeing & Optimization
Level 3 , Rev.1.0
Cannot Charge (2)
• If Battery ID is not the readable , please check whether battery is
BT60 and contact to PIN3 OF J2
•
R93
n.m.
J2
476150001 4P P2 MOLEX
BATT- 1
THERM 2
DATA 3
BATT+ 4
R92
n.m.
R147
100R
C197
39pF C198 39pF
VBATT
VREG_HKADC_2.85V
BGND
BATT_THERMAL_GAUGING
BATT_THERM 4
40mil
BATTERY CONNECTOR
BATT_DATA_1

Service Engineeing & Optimization
Level 3 , Rev.1.0
Cannot Charge (3)
3. Dial #77704# to check the gas gauge Status
AC Line : On (Has detect the charger)
Flag : Charging (The charger driver is active)
The current is minus, please check U604 circuit.
5V Should be < 4.3V in charging
Should be < 2V in charging

Service Engineeing & Optimization
Level 3 , Rev.1.0
Keypad No Function
1. Check S/B connector J13

Service Engineeing & Optimization
Level 3 , Rev.1.0
Touch No Function
– Check TP damage or not
– Check assembly between main PCB and sub PCB
– Check J13 SMT

Service Engineeing & Optimization
Level 3 , Rev.1.0
Jog Ball No Function
• 1. Check the magnet is at the correct position
• 2. Check the voltage (JB1-10 =2.85V)
• 3. Check the related circuit
Magnet
Location
2.85V
GPIO_40 (2.6V)
GPIO_49 (2.6V)
GPIO_38 (2.6V)
U18
AN48840B
NC
1GND
2NC1
3
VCC 4
OUT 5
GPIO_90 (2.6V)
U19
AN48840B
NC
1GND
2NC1
3
VCC 4
OUT 5
U20
AN48840B
NC
1GND
2NC1
3
VCC 4
OUT 5
D25
RCLAMP0521P
1 2
D26
RCLAMP0521P
1 2
JOG_2.85V
Jog_LEFT 6
Jog_DOWN 6
Jog_RIGHT 6
Jog_UP 6
D27
RCLAMP0521P
1 2
D28
RCLAMP0521P
1 2
U17
AN48840B
NC
1GND
2NC1
3
VCC 4
OUT 5
C322 33pF 0201
C321
33pF 0201
Jog Up
Jog Down
Jog Right
Jog Left

Service Engineeing & Optimization
Level 3 , Rev.1.0
Can’t access the Micro SD Card
• If the T-Flash card can not be detected, check if the pin12 of J16 is
low. If not, check if J16 is OK.
• If pin12 of J16 is low when inserted, check if pin5 of J16 is 3V. If not,
check U2.
• Check if all the clock and data pins are normal. If not, check U1.
T-Flash Slot J16