M303 Project Overview

Repair Guide to Halley

(On-Site Training)

ASUSTeK

Mingwei

Kang

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ID Concept

Power Key

Volume
Up/Down

Browser

5-way Navigator

Hard
/Soft
Keys

Dial/End & Numeral Keys

Speaker

Battery Cover

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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)

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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

Saw

Dup

SDRAM

NAND

Bluetooth

Keypad

Comm. CPU

Battery

Charger

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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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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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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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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

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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

Saw

Dup

SDRAM

NAND

Bluetooth

Keypad

Comm. CPU

Battery

Charger

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Power

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

On Sequence(1)

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App. CPU Power

On Sequence(2)

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Comm. CPU Power

On Sequence

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Power

On Sequence Check

VLDO_RTC (TP37)

32kHz

BUCK_VCORE_1 (L47.2)

VLDO2_1V8

13MHz

SYS_EN (Q3.5)

PWR_EN (TP1)

BUCK_VCORE_2 (L48.2)

nRESET_OUT (TP7)

nNF_CS (TP6)

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Schematics Overview (1/2)

Block Diagram

Revision History (Ignore this page)

GPIO Table

App. CPU (1/3)

App. CPU (2/3)

App. CPU (3/3)

SDRAM/Flash

Bluetooth

Micro-SD/USB

10. LCD/LED/Vibrator

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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

(

mingwei

_kang@asus

.com

.tw

)

Document Outline