Asus P320 User manual

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ASUS P320 Level 3 4 Trouble
shooting Guide
Ver 1.0

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CONTENT
1. OVER VIEW............................................................................................... 4
1.1 S YSTEM BLOCK DIAGRAM ............................................................................ 4
1.2 P OWER D OMAIN B LOCK .............................................................................. 5
1.3 K EY F EATURES ............................................................................................ 6
1.4 A PPEARANCE ............................................................................................... 7
1.5 P LACEMENT TOP V IEW ............................................................................... 8
1.6 P LACEMENT B OTTOM V IEW ......................................................................... 9
2. SYSTEM BOOT UP SEQUENCE: ............................................................ 11
2.1 P OWER / C LOCK / R ESET R AMP P ROCESS .................................................... 11
2.2 P OWER O N R ESET G ENERATION ................................................................ 11
3. EQUIPMENT / TOOLS............................................................................... 12
4. TROUBLE SHOOTING CASE .................................................................. 14
4.1 C AN ’ T P OWER O N ...................................................................................... 15
4.2 D ISPLAY F AILED ........................................................................................ 16
4.3 T OUCH P ANEL F AILED ............................................................................... 17
4.4 B ATTERY CONNECTOR DEFECTIVES ........................................................... 18
4.5 SIM C ARD F AILED ..................................................................................... 19
4.6 M ICRO SD C ARD F AILED ........................................................................... 20
4.7 A UDIO H EADPHONE F AILED ...................................................................... 21
4.8 B OARD M ICROPHONE F AILED .................................................................... 22
4.9 S PEAKER F AILED ....................................................................................... 23
4.10 R ECEIVER F AILED .................................................................................... 24
5. RF REPAIR REQUIREMENT................................................................... 25
5.1 S OFTWARE REQUIREMENTS ：.................................................................... 25
5.2 H ARDWARE REQUIREMENTS ：.................................................................. 25
5.3 E QUIPMENT ............................................................................................... 25
6. RF BLOCK DIAGRAM .............................................................................. 26
6.1 GSM/EDGE.............................................................................................. 26
6.2 GPS ........................................................................................................... 26

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6.3 BT/W I F I .................................................................................................... 26
7. RF PCB LOCATION ................................................................................... 27
7.1 GSM.......................................................................................................... 28
7.3 BT / W I F I ................................................................................................... 29
8. GSM TROUBLE SHOOTING.................................................................... 30
8.1 M ETHODS FOR DEBUGGING ........................................................................ 30
8.2 AFC F AIL .................................................................................................. 33
8.3 APC F AIL (TX).......................................................................................... 34
8.4 AGC F AIL (RX)......................................................................................... 35
9. GPS TROUBLE SHOOTING..................................................................... 36

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1. Over view
1.1
1.1 1.1
1.1 S
SS
System block diagram
ystem block diagramystem block diagram
ystem block diagram
i. Figure 1. System Block Diagram

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1.2
1.21.2
1.2 Power Domain
Power Domain Power Domain
Power Domain Block
BlockBlock
Block
Figure 2. Power Block Diagram

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1.3
1.3 1.3
1.3 Key Features
Key FeaturesKey Features
Key Features
System EDGE/GPRS/GSM 850/900/1800/1900MHz
EGPRS Class B, Multi-slot Class 10
Form Factor Bar Type
Dimension & Weight 99 x 54.5 x 13.35 mm, 105g
Battery 1100 mAh Lithium-Ion
Talk Time 4 hrs (TBC)
OS Microsoft Windows Mobile 6 Professional*
Processor TI OMAP 850 200 MHz
Memory 128 MB Flash + 64 MB DDR
Display 2.6, Touch Screen 65K, TFT, 240 x 320
Camera 2.0 Mega pixel AF
Connectivity WLAN 802.11b+g, USB v1.1, Bluetooth
V2.0+EDR
Exp. Slot Micro-SD (SDHC Compatible)
Music MP3, WMA, AAC, and AAC+
Browsing HTTP and WAP 2.0
Messaging SMS, MMS 1.2, and Push E-mail
JAVA J2ME (CLDC 1.1 + MIDP2.0)
DRM OMA 1.0 (optional)
PIM & Utilities Contacts, Notes, Calendar, Tasks, Alarm,
Calculator, File Manager, and MSN
Ringtone 128-ch Polyphonic ringer & MP3
Others ASUS Today, Profile Manager, Theme Manager,
UrTime , Newstation, ASUS Backup, etc.

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1.
1.1.
1.4
44
4 A earance
A earance A earance
A earance

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1
11
1.
..
.5
55
5 Placement TOP View
Placement TOP View Placement TOP View
Placement TOP View
1.15-Pin Debug
Connector
2. Receiver
3.3-Color LED
4. Power Key
Switch
5. Micro SD Card
Socket
6. Power
7. Reset Key Switch
8. Backup Battery

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1.
1.1.
1.6
66
6 Placement Bottom View
Placement Bottom View Placement Bottom View
Placement Bottom View

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1. Speaker
2. GSM Antenna Spring
3. GPS Antenna Spring
4. GPS Antenna Connector
5. Camera Module Connector
6. SIM Card Socket
7. GSM Antenna Conductive Connector
8. VR Key Switch
9. Volume Up Switch
10. Volume Down Switch
11. Hold Key Switch
12. GPS Part
13. GSM Part
14. Battery Connector
15. Vibrator
16. OMAP 850 Processor
17. TWL3027 (E-Syren) PMU IC
18. LCM Connector
19. Charger IC
20. One NAND
21. Camera Key Switch
22. BT/ WiFi Combo Module
23. BT/ WiFi Chip Antenna
24. Reset Key Switch
25. Mini USB Connector
26. Microphone

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2. System Boot up Sequence:
2.1
2.1 2.1
2.1 Power/ Clock/ Reset Ram Process
Power/ Clock/ Reset Ram ProcessPower/ Clock/ Reset Ram Process
Power/ Clock/ Reset Ram Process
2.2
2.2 2.2
2.2 Power On Reset Generation
Power On Reset GenerationPower On Reset Generation
Power On Reset Generation

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3. Equipment / Tools

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6. Headset (USB Port)

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4. Trouble shooting case

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4.1 Can
4.1 Can4.1 Can
4.1 Can’
’’
’t Power On
t Power Ont Power On
t Power On
Note 1:
1、Measure the reset signal ( MPU_RST#、ON_nOff ), Low►inspect
related components.
2、Measure clock signals XTAL_OUT (32kHz), CLK13M
(13MHz),RF_CLK (26MHz) ►inspect related components U1, X1,
U1804.
3、Measure Chip Select Signal FCS# and DDR_CS# (H←→L) ►
inspect U1 and U5.
4、Measure Data Signal FLASH_D0 and DDR_D0 (H←→L) ►
inspect U1 and U5.
5、Remove the Memory U5, Re-download Image and Remount U5.
Note 2:
1、Don’t provide Power to PCB, and measure the impedance of all
power domain on the device.
Note 3:
1、Re-download image.

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4.2
4.24.2
4.2 Dis lay Failed
Dis lay Failed Dis lay Failed
Dis lay Failed
1. Check LCD connector (CON9) => assembly, soldering issue
2. Replace LCD to golden sample => component issue
3. Check power supplied (R233, R232), LCM_RST# (R195), LCM_PWR_EN
(R240) => soldering issue
4. Check communicated components between LCD and CPU (EMI1~5) =>
soldering issue.

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4
44
4.
..
.3
33
3 Touch Panel Failed
Touch Panel FailedTouch Panel Failed
Touch Panel Failed
1. Check LCD connector (CON9) => Assembly, Soldering issue
2. Replace LCD to golden sample => Component issue
3. Check if the Hold Key is locked => Assemble issue
4. Check U15. C184~C187 => Assembly, Soldering issue
5. Check Power R91=> Soldering issue

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4.4
4.4 4.4
4.4 Battery
Battery Battery
Battery connector
connector connector
connector defectives
defectivesdefectives
defectives
1. Check the Battery connect (CON7) => Soldering issue
2. Check signal, BAT HDQ (R102), U18 (Charger IC) => Soldering issue
The Charger IC can get the current via CON7.

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4
44
4.
..
.5
55
5 SIM Card Failed
SIM Card FailedSIM Card Failed
SIM Card Failed
1. Check Wireless-manager on the WM6, Phone function must be ON =>
Operation notice
2. Check antenna cover => Assembly issue
3. Check SIM socket (CON1) and peripherals => Soldering issue
4. Check E-Syren (U17) and peripherals => Soldering issue
Phone Off

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4.6
4.6 4.6
4.6 Micro SD Card Failed
Micro SD Card FailedMicro SD Card Failed
Micro SD Card Failed
1. Check Micro-SD socket (J5) => soldering issue.
2. Check communicated components between Micro-SD (J5) and CPU (U1),
U346, U347 peripherals => Soldering .
3. Measure power supplied U21 and R209 => Solder issue.
4. Measure clock signal SDMMC_CLK (R159) => Check U1 and peripherals