Repair Guide to Halley
(On-Site Training)
ASUSTeK
ASUSTeK
Mingwei
Mingwei
Kang
Kang
• ID Concept
• Hardware Features
• System Architecture
• Peripheral Trouble Shooting
• Power-On Sequence
• Appendix
• Q & A
Agenda
Agenda
Agenda
ID Concept
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ID Concept
ID Concept
ID Concept
Power Key
Volume
Up/Down
Browser
5-way Navigator
Hard
/Soft
Keys
Dial/End & Numeral Keys
Speaker
Battery Cover
Hardware Features
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Halley Hardware Features
Halley Hardware Features
• Dual Chip Solution
– Application CPU : PXA270 312MHz
– Communication CPU : PXA90x 312MHz
• Memory
– 128MB NAND Flash
– 64MB SDRAM
• 2.2” QVGA (240 x 320) TFT LCD (65K colors)
• Key : Hard Keys, Soft Keys, and 5-way Navigator
• Micro-SD Memory Card Slot (up to 1GB)
• Lithium-ion Battery (1100mAh)
System Architecture
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Halley System Architecture
Halley System Architecture
2.2" TFT
LCD
Microphone
Receiver
Headset
Jack
PXA270
312MHz
Mini-AB USB
connector
Micro-SD
card slot
AFE/
Codec
WCDMA RF
GSM RF
PXA90x
312MHz
SIM
connector
PSRAM
PMIC
Loud speaker
Vibrator
LEDs
App. CPU
PA
PA
Saw
Dup
SDRAM
NAND
Bluetooth
Keypad
Comm. CPU
Battery
Charger
Peripheral Trouble
Shooting
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Peripheral Trouble Shooting
• MMI Test Program
• LCD
• Keypad / Side keys
• Receiver
• Speaker / MIC
• SIM / Micro-SD
• Headset
• Charging / Sync
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MMI Test Program (1/2)
1. SD/MMC
2. SDRAM
3. NAND Flash
4. BT Module Test
5. SIM
6. Main LCD
7. Keypad/Button
8. USB Host
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MMI Test Program (2/2)
9. Audio
10. BT Test Mode
11. Set Vibrator
12. LED Test
13. Receiver
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LCD (1/2)
• White Screen => take the device apart
– LCD FPC (
oblique
?)
– LCD CON (mounted properly?)
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LCD (2/2)
• Black Screen => take the device apart
– LCD FPC (
damaged
?)
– LCD CON (mounted properly?)
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Keypad
• Keypad no function=> take the device apart
– Main Board CON
– Serial Resistors (mounted properly?)
– Keypad CON
– Keypad FPC
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Side Keys
• No function => take the device apart
– Side Keys fall off ?? (check its pins)
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Receiver
• No Sounds Output => take the device apart
– Check the contact between the receiver pins and
the pads on the main PCB
(Is the pin oblique/sunk?)
– Single part problem? (change another one)
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Speaker (1/2)
• No Sounds Output
=>
Press the neighbors of the Speaker
– If there is a sound output when we press it but
there is no sound output as long as we release
our hands on the speaker, we need to take the
device apart and then reassemble it.
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Speaker (2/2)
• No Sounds Output when we have already
pressed the neighbors of the Speaker
=> take the device apart
– Check the contact between the speaker pins and
the stand-off on the main PCB
(Is the pin/stand-off oblique?)
– Single part problem?
(change another one)
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MIC
• Cannot record => take the device apart
– Is the rubber set properly?
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SIM
• SIM card cannot be accessed
=> take the device apart
– Check the contact between the SIM CON and
the pads on the main PCB
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ASUSTeK Proprietary and Confidential
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Micro-SD
• Micro-SD card cannot be accessed
=> take the device apart
– Check the contact between the Micro-SD CON
and the pads on the main PCB
– Are the pins of Micro-SD CON oblique/sunk?
(P.S. The pins mentioned above are the ones which are in touch with
external Micro-SD card.)
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Headset
• Cannot be recognized when the headset is
plugged into the audio jack
=> take the device apart
– Check the status of the headset detect pin
– Headset Mode : 1
– Normal Mode : 0
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Charging/Sync (1/2)
• Charging LED => Red light
• USB/Charger cannot recognized when they
were plugged into the USB CON
– Check the contact between
USB CON pins and the
pads on the main PCB
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Charging/Sync (2/2)
• Charging LED => Red light
• Cannot be charged when the charger is
connected to the device
– Check the PMOS (Q5)
CH_Source
CH_Gate
VCHG_VBUS
CH_OUT
Power-On Sequence
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Halley System Architecture
Halley System Architecture
2.2" TFT
LCD
Microphone
Receiver
Headset
Jack
PXA270
312MHz
Mini-AB USB
connector
Micro-SD
card slot
AFE/
Codec
WCDMA RF
GSM RF
PXA90x
312MHz
SIM
connector
PSRAM
PMIC
Loud speaker
Vibrator
LEDs
App. CPU
PA
PA
Saw
Dup
SDRAM
NAND
Bluetooth
Keypad
Comm. CPU
Battery
Charger
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Power
Power
-
-
On Sequence
On Sequence
• When the device cannot boot up, we need to
check the power-on sequences.
– App. CPU (PXA270) power-on sequence
– Comm. CPU (PXA90x) power-on sequence
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App. CPU Power
App. CPU Power
-
-
On Sequence(1)
On Sequence(1)
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App. CPU Power
App. CPU Power
-
-
On Sequence(2)
On Sequence(2)
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Comm. CPU Power
Comm. CPU Power
-
-
On Sequence
On Sequence
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Power
Power
-
-
On Sequence Check
On Sequence Check
a)
VLDO_RTC (TP37)
b)
32kHz
c)
BUCK_VCORE_1 (L47.2)
d)
VLDO2_1V8
e)
13MHz
f)
SYS_EN (Q3.5)
g)
PWR_EN (TP1)
h)
BUCK_VCORE_2 (L48.2)
i)
nRESET_OUT (TP7)
j)
nNF_CS (TP6)
Appendix
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Schematics Overview (1/2)
Schematics Overview (1/2)
1.
Block Diagram
2.
Revision History (Ignore this page)
3.
GPIO Table
4.
App. CPU (1/3)
5.
App. CPU (2/3)
6.
App. CPU (3/3)
7.
SDRAM/Flash
8.
Bluetooth
9.
Micro-SD/USB
10. LCD/LED/Vibrator
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Schematics Overview (2/2)
Schematics Overview (2/2)
11. Audio
12. Comm. CPU
13. Codec/AFE
14. Ignore this page
15. Function Key/Keypad
16. Ignore this page
17. PMIC
18. BB/RF Interface
19. GSM/GPRS
20. WCDMA
21. Debug
Q & A
Q & A
(
(
mingwei
mingwei
_kang@asus
_kang@asus
.com
.com
.tw
.tw
)
)
Thank you !
Thank you !