ASUS P550 User Manual
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GTC ■ Service Manual
ASUS P550 Level 3 4
Trouble shooting Guide
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Context
1. Feature Introduction ........................................................................................................................................... 3
ID Overview ................................................................................................................................................... 3
Main key function Description....................................................................................................................... 4
2. Block Diagram ................................................................................................................................................... 5
3.1 Solaris TOP View..................................................................................................................................... 6
3.2 Solaris Bottom View ................................................................................................................................ 7
4. Base Band Repair Tooling.................................................................................................................................. 8
4.1 HW ........................................................................................................................................................... 8
5. Chip Timing Sequence ..................................................................................................................................... 10
5.1 PMU Timing Sequence .......................................................................................................................... 10
5.2 CPU Timing sequence ............................................................................................................................ 11
5.3 System Flowchart ................................................................................................................................... 12
5.4 Power supply Block................................................................................................................................ 13
5.5 Power system Supplied Block................................................................................................................ 14
5.6 Power System Charging block ............................................................................................................... 14
6. Trouble shooting............................................................................................................................................... 15
6.1 General Process ...................................................................................................................................... 15
6.2 Can’t Power ON process ........................................................................................................................ 16
7. Trouble shooting............................................................................................................................................... 18
7.1 Touch panel failed .................................................................................................................................. 18
7.2 SDRAM.................................................................................................................................................. 19
7.3 Flash failed ............................................................................................................................................. 20
7.4 SDCARD................................................................................................................................................ 20
7.5 WiFi failed.............................................................................................................................................. 22
7.6 Modem-BUS failed ................................................................................................................................ 23
7.7 SIM failed............................................................................................................................................... 24
7.8 LED ........................................................................................................................................................ 24
7.9 Display failed.......................................................................................................................................... 25
7.10 Battery failed ........................................................................................................................................ 26
7.11 Vibrator failed....................................................................................................................................... 27
7.12 Camera.................................................................................................................................................. 27
7.13 Button failed ......................................................................................................................................... 28
7.14 BT failed............................................................................................................................................... 29
7.15 Audio failed .......................................................................................................................................... 29
Speaker no sound.................................................................................................................................. 29
Receiver no sound ................................................................................................................................ 30
Headphone no sound ............................................................................................................................ 31
Headphone MIC no record ................................................................................................................... 32
7.16 Standby current failed........................................................................................................................... 33
8. RF Repair Requirement............................................................................................................................ 34
8.1 SW： ...................................................................................................................................................... 34
8.2 HW： ..................................................................................................................................................... 34
8.3 Equipment： .......................................................................................................................................... 34
9. Block Diagram ................................................................................................................................................. 35
9.1 System Block Diagram........................................................................................................................... 35
9.2 GSM/GPRS – GSM RFMD solaris I Block Diagram............................................................................ 36
9.3 WCDMA – Maxim 3G Block Diagram.................................................................................................. 37
9.4 Blue tooth – CSR BC04 ......................................................................................................................... 38
9.5 WIFI– UGGZ3X10BA ........................................................................................................................... 39
9.6 GPS– GSC3F/LP-7................................................................................................................................. 40
10.1 Backside Antenna Area Test Points...................................................................................................... 41
10.2 GSM/GPRS Test Points........................................................................................................................ 42
10.3 WCDMA Test Points............................................................................................................................ 43
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11. GSM & WCDMA RF Tx/Rx Path.................................................................................................................. 44
11.1 GSM Tx path ........................................................................................................................................ 44
11.2 GSM Rx path........................................................................................................................................ 44
11.3 WCDMA Tx path ................................................................................................................................. 45
11.4 WCDMA Rx path ................................................................................................................................. 45
12. Test & Repair Flow Chart............................................................................................................................... 47
12.1 Conductive & Antenna Test Procedure ................................................................................................ 47
12.3 WCDMA Test & Repair Procedure ...................................................................................................... 49
12.4 Blue tooth Test & Repair Procedure..................................................................................................... 50
12.5 WIFI Test & Repair Procedure............................................................................................................. 51
13. Test Points Signal Examples .......................................................................................................................... 52
13.1 GSM900 ............................................................................................................................................... 52
13.2 DCS1800 .............................................................................................................................................. 55
13.3 PCS1900............................................................................................................................................... 58
13.4 WCDMA .............................................................................................................................................. 61
14. Blue tooth ....................................................................................................................................................... 67
15. WIFI ............................................................................................................................................................... 71
16. Appendix ........................................................................................................................................................ 75
16.1 Typical Value of GSM/GPRS Conductive Tx/Rx Test......................................................................... 75
16.2 Typical Value of WCDMA Conductive Tx/Rx Test ............................................................................. 75
16.3 Tx Test Environment Setup .................................................................................................................. 76
16.4 Rx Test Environment Setup.................................................................................................................. 77
17. GPS Introduce Purpose: ................................................................................................................................. 78
17.1 Equipment requires............................................................................................................................... 78
17.2 Software: .............................................................................................................................................. 78
17.3 Hardware: ............................................................................................................................................. 78
18. GPS Test points & Schematic......................................................................................................................... 79
18.1 GPS Active Path................................................................................................................................... 79
18.2 Passive Path.......................................................................................................................................... 80
18.3 GPS Chip.............................................................................................................................................. 80
18.4 Power part test points ........................................................................................................................... 81
18.5 Testing signal from base band .............................................................................................................. 81
19. Test points placement point ............................................................................................................................ 82
19.1 GPS Antenna ........................................................................................................................................ 82
20. GPS Hardware Examination Procedure ................................................................................................. 83
21. Measurement results of all test points ............................................................................................................ 87
22. Software procedure......................................................................................................................................... 89
22.1 GPS firmware download ...................................................................................................................... 94
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1. Feature Introduction
Solaris: WCDMA/GSM/GPS PDA Phone ( Mars-series)
1.1 Specification
Operation system : Windows Mobile 6.0
CPU : Marvell PXA270 520MHz
Main Memory : 256MB Flash (M-System H3) + 64MB SDRAM
(INFINEON HYB18L512320BF-7.5)
Modem : Intel PCPXA900 312MHz
Modem Memory : 32MB Stacking Flash + 16Mb PSRAM (Micron
MT45W1M16PDGA)
LCD : 3.5 inch, QVGA, Transflective, Touch-panel
(TPO TD035STED8)
Camera : 2M pixel, Fixed Focus (Walton COB20MZ1-solaris)
WiFi : IEEE 802.11b/g (ALPS UGGZ3X10BA)
Bluetooth : Bluetooth V2.0 (CSR BC41B143A05-IXB-E4)
GPS : SiRF StarIII GSC3F/LP-7979
Extended memory : Mini-SD Socket
Battery : 1530mAh (Welldone SBP-14)
ID Overview
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Main key function Description
1.Power Key
2.Explorer Key
3.3-way Navigation-Key
4.OK Key
5.Reset Key
6.Receiver
7.Notification LED
8.LCD (Touch)
9.Message center
10.Function Key1
11.Send Key
12.Start Key
13.Back Key
14.Function Key2
15.End Key
16.OK Key
17.5-way Navi-Key
18.Stylus
19.Active GPS antenna socket
20.Mini-SD socket
21.Hold Key
22.Camera Key
23.Camera
24.Speaker
25.Battery Cover
26.Phone Jack
27.Mini USB socket
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2. Block Diagram
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3. BASE Band Placement
3.1 Solaris TOP View
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3.2 Solaris Bottom View
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4. Base Band Repair Tooling
4.1 HW
Power source: power supply (Monitor current)
Digital Phosphor Oscilloscope
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Digital Meter
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Adapter: JSP050090UU
Mini SD with test-program
ME tool
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5. Chip Timing Sequence
5.1 PMU Timing Sequence
Base band start-up sequence:
1. The DA9030 powers up the following LDO for the Baseband: LDO3, LDO4,
LDO5, LDO 6, LDO8, LDO7, LDO9,LDO12, LDO14 (I/O LDOs, RF l LDOs
and VCTXO LDO).
2. After delay of 200μs from end of stage 1 the DA9030 powers up LDO1 and
DC/DC1 (Base band core and PLL).
3. After delay of 10ms from end of stage 2 the DA9030 will power up LDO2
(internal Flash LDO).
4. After delay of Tdelay2 (32ms) from the start of the start-up sequences (stage 1)
the DA9030 will raise RESOUT_N
signal to the base-band chip
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5.2 CPU Timing sequence
PXA27x Start-up sequence:
1. Once the VBAT has risen above the VBATUNDER threshold, the DA9030
de-asserts (High) BATT_FAULT signal to
the PXA27x chip (indicating that VBAT is ok).
2. On receiving a start event the DA9030 de-asserts RESOUT1_N (high) (a
minimum 50ms from power up of the RTC
LDO is required to reset the PMU unit in the PXA27x and before RESOUT1_N
can be de-asserted).
3. The DA9030 waits for the PXA27x to assert (High) SYS_EN and powers up
the LDOs associated with this signal
(described below).
4. The DA9030 waits for the PXA27x to assert PWR_EN (typically 125ms after
asserting SYS_EN) and powers up the
sources associated with this signal (described below).
5. After all sources are stable for the PXA27x, the DA9030 will de-assert (High)
VCC_FAULT (so the PXA27x can
continue with its power up sequence).
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5.3 System Flowchart
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Plug-in
Battery
(VBAT)
PWR_ON#
=VBAT
VLDO_RTC =
2.65V
Hermon_XTAL_IN(OUT) = 32KHz
VCXO_CLK(BB_CLK = 13MHz
Hermon_RESET_IN# = 2.65V
PMU_RESOUT_HERMON_OD#= 2.8V
32K_OUT_SLP = 32KHz
Bulverde_PXTAL_IN(OUT) = 13MHz
Bulverde_HW_RST# = 2.8V
Bulverde_SW_RST# = 2.8V
Push
Power-Key
PMIC with
Hermon
Power On
PMIC with
Bulverde
Hermon
Execute Boot-code
from Stack-Flash
Bulverde
Execute Boot-code
from Flash (U9)
Read
ON-mode
Check power-on
mode
Normal, download,
charging
Hermon
Execute OS in
RAM (U11)
from Stack-Flash
Re-boot
Write mode to
PMIC
Reset Hermon
Bulverde
Execute OS in RAM (U8)
from Flash (U9)
Read
ON-mode
Bulverde_SD_CS
0#
Bulverde_NF_
CS#
Bulverde
Init pheripherals
(Phone, LCD...)
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Windows
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5.4 Power supply Block
¾ Power system ~ Supplied
CPU
VCORE
CPU RTC
Mini-SD
LCD
Mic,
Headphon
CPU PLL
CPU
SRAM
CPU USB
CPU IO(2.8V), Flash
CORE
PCA9535,
Modem IO(1.8V)
Modem memory,
Codec VCCP
CPU IO(1.8V),
Flash IO
SDRAM, Camera
VLDO15, 1.3V
VLDO16, 1.1V
VLDO17, 3.2V
VLDO18, 2.8V
VCORE_2, 1V~1.5V
VLDO3, 2.8V
VLDO10, 3.2V
VLDO11, 2.8V
VLDO13, 2.1V
AUX_1V8, 1.8V
PMU
U14
DC/DC
(U15)
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VCORE_1, 1.25V
VLDO_RTC, 2.65V
VLDO1, 1.2V
VLDO3, 2.8V
VLDO5, 2.8V
VLDO6, 1.8V ~ 3V
VLDO19, 1.8V
Modem
VCORE
Modem RTC,
GPS RTC
Modem
PLL
Modem IO(2.8V),
Codec VCC
Codec
VCCA
Modem SIM, SIM
card
BT CORE
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5.5 Power system Supplied Block
¾ Power system ~ Supplied
Camera 2.8V
DC/D
LCD LED,
20V(Max)
CAM_2V8, 2.8V
C
LDO
U18
LCD
Backlight
5.6 Power System Charging block
Charger IC
(U21)
Cable
insert
AC_USB_IN, 5V
CHG_ST1, CHG_ST2
Charging
USB,
100mA
PMIC
(U14)
PMU_IRQ#, 0V
Change
charging
CPU
(U1)
Charging
CHG_P_SEL, CHG_USB_ISET, CHG_DIS
USB_C_D+, 3.2V
Detect
type
Battery
(CON2)
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6. Trouble shooting
6.1 General Process
¾ Trouble shooting ~ Procedure
Check orientation, position
Check SMT
components
PCBA
Abnormal
Set Power supply to 4V,
and
limit current to 1A
Press Power Key
(>5sec)
Monitor
current
RUN
Test-prog
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Connect +,- to VBAT, GND
Check connector, components
System
Abnormal
Failed item in System level Failed item in Board level
Disassemble
assembly parts
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6.2 Can’t Power ON process
VBAT & GND short
U14, U15, U17, U18,
1. CPU failed to
load image
2. Flash failed to
provide image
3. SDRAM failed
to execute image
see note_1
Complete rework
Check supplied
components
LED1, U21
Complete rework
PMIC provide
abnormal power
(U14)
Check power supplied
domain
see note_2
Abnormal
Limit current
Abnormal
200mA -> 0mA
(8sec)
Abnormal
Suddenly
0mA
Check LCD connector
Set Power supply to
4V, and
limit current to 1A
Connect +,- to VBAT, GND
Monitor
current
Current ~ 0mA
Press Power Key
(>5sec)
Abnormal display
Monitor
Complete rework
Normal
200~400mA
and components
between
LCD and CPU
END
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Complete rework
Abnormal
> 400mA
Check components
Abnormal
Sustain
U14 is the most case.
orientation and
touch BGA chip, feel
temperature.
0mA
Check Battery
connector and
VBAT-related
components
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Note 1
Measure reset signal (Bulverde_HW_RST#, Bulverde_SW_RST#), High =>
Inspect related components.
2. Measure clock signal (Bulverde_PXTAL_IN, Bulverde_PXTAL_OUT),
13MHz. (Bulverde_32K_IN), 32KHz.
Inspect U1, X1. And U10.
3. Measure chip-select signal (Bulverde_NF_CS#), H-L...
(Bulverde_SD_CS0#), H-L... => Inspect U1
4. Measure data-signal (D0), H-L... => Inspect U8, U95. Un-mount Flash(U9)
and re-download image. And then re-mount.
Note 2
1. Don’t supply VBAT to PCB, and measure impedance of all power supplier
(VCORE_1, VCORE_2.....)
Note3
Re-download image
2. If re-download image remain failed, please un-mount Hermon (U10) and
re-download by DATA-IO.
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7. Trouble shooting
7.1 Touch panel failed
1. Check LCD connector (CON3) => Assembly, Soldering issue
2. Replace LCD to golden sample => Component issue
3. Check communicated components between LCD (CON3) and Codec (U13)
=> Soldering issue
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7.2 SDRAM
1. Check SDRAM (U8) and peripherals => Soldering issue
2. Measure power supplied, AUX_1V8_2 (R43) => Power supplied issue, check
U15, Q5 peripherals
3. Measure clock signal, Bulverde_SDCLK1 (R1) => Check U1 and peripherals
4. Measure chip-select signal, Bulverde_SD_CS0# (T51) => Check U1 and
peripherals
Note: If normal display and hang-up,
Modem failed to load image.
see note_3
END
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7.3 Flash failed
1. Check Flash (U9) and peripherals => Soldering issue
2. Measure power supplied, AUX_1V8_2 (R43), VLDO18 (R49) => Power
supplied issue, check U15, Q5 peripherals
3. Measure chip-select signal, Bulverde_NF_CS# (T49) => Check U1 and
peripherals
4. Measure chip-select signal, M-SYSTEM_BUSY# (R47) => Components
issue, replace U9
7.4 SDCARD
1. Check mini-SD socket (CON6) => Soldering issue
2. Check communicated components between mini-SD (CON6) and CPU (U1),
U42 and peripherals => Soldering
3. Measure power supplied, VLDO10 (R290) => Power supplied issue, Check
PMIC (U14)
4. Measure clock signal, SDMMC_CLK (R5) => Check U1 and peripherals
1. Check SDRAM (U8) and peripherals => Soldering issue
2. Measure power supplied, AUX_1V8_2 (R43) => Power supplied issue, check
U15, Q5 peripherals
3. Measure clock signal, Bulverde_SDCLK1 (R1) => Check U1 and peripherals
4. Measure chip-select signal, Bulverde_SD_CS0# (T51) => Check U1 and
peripherals
Note: If normal display and hang-up,
Modem failed to load image.
see note_3
END
BAT_HDQ
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7.5 WiFi failed
1. If performance failed, check assembly WiFi antenna, Spring (U31,U32)
contact => Assembly, Soldering issue
2. Check WiFi (U35), Level-shift (U36) and peripherals => Soldering issue
3. Measure power supplied, WLAN_3V3 (R277), WLAN_1V5 (R278) => Q12,
U41 and peripherals, soldering issue
4. Measure chip-select, Bulverde_WLAN_CS# (R255) => Components issue,
U35, U36, U1 and peripherals
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7.6 Modem-BUS failed
1. Check Modem (U10), PSRAM (U11) and peripherals => Soldering issue
2. Clean-boot or Re-download image => Image crash
3. Measure power supplied, VCORE_1 (R79) and etc. => Check PMIC (U14)
and peripherals
4. Measure clock signal, VCXO_CLK ( OSC1), 13MHz. X’TAL (X2), 32KHz.
=> Check PMIC (U14) and peripherals
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7.7 SIM failed
1. Check Wireless-manager, Phone must be ON => Operation issue
2. Check antenna cover => Assembly issue
3. Check SIM socket (CON1) and peripherals => Soldering issue
4. Check Modem (U10) and peripherals => Soldering issue
Phone OFF
7.8 LED
1-1. If Keypad LED failed, please check Keypad FPC assembly => Assembly
issue
1-2. If assembly is fine, please check connector (CON5) and peripherals =>
Soldering issue
2-1. If notification LED (LED1) failed, check LED1 and peripherals =>
Soldering issue
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7.9 Display failed
1. Check LCD connector (CON3) => Assembly, Soldering issue
2. Replace LCD to golden sample => Component issue
3. Check power supplied (R216), reset# (R198), SD (R270) => Soldering issue
4. Check communicated components between LCD (CON3) and CPU (U1) =>
Soldering issue
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7.10 Battery failed
1. Double check Battery on fine device => Component issue
2. Check Battery connect (CON2) => Soldering issue
3. Check signal, BAT HDQ(CON2, pin4), Q8, U20 => Soldering issue
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7.11 Vibrator failed
1. Check Vibrator => Assembly issue
2. Replace Vibrator to golden sample => Component issue
3. Check power supplied (R36), Driving signal (Q2) => Soldering issue
7.12 Camera
1. Check Assembly => Assembly issue
2. Replace Camera module to golden sample => Component issue
3. Check Camera connector => Soldering issue
4. Check power supplied (U18), CAM_RESET# (R187), CAM_STBY (R185),
Bulverde_I2C (RN1), CAM_MCLK (R8)
26MHz => Soldering issue
5. Check signal from Camera, CAM_XXX => Component issue
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7.13 Button failed
1. Check stick position of keypad board => Assembly issue
2. Check assembly between keypad and connector (CON5) => Assembly issue
3. Replace to golden sample => Component issue
4. Check signal KP_XXX => Soldering issue
5. Check assembly of side-Key => Assembly issue
6. Check SMT switch (SW1 ~ SW7) => Soldering issue
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