Asus A500KL EE Trouble Shooting Guide

A500KL

EE Trouble Shooting Guide

Fail case 分析

• System can’t power on

• eMMC issue

• Display issue

• Touch Panel issue

Fail case 分析

• System can’t power on

• eMMC issue

• Display issue

• Touch Panel issue

• Camera issue

• USB issue

• Sensor issue

• Audio issue

• Charger

System Can’t Power On

System Can’t Power On

• Step1. 目檢是否有SMT 外觀不良(連錫, 空焊, 偏移, 極性錯誤…………..)

• Step2. 量測以下電壓有無輸出, 有無與GND短路

VREG_S3_1P35V
VREG_L3_1P15V
VREG_S1_1P15V
VREG_S4_2P1V
VREG_L6_1P8V
VREG_L10_1P8V
VREG_L2_1P2V
VREF_LPDDR2;
VREG_L20_3P075V
VREG_L20_3P075V
VREG_L20_3P075V
MSM_RESIN_N

• Step1. 目檢是否有SMT 外觀不良(連錫, 空焊, 偏移, 極性錯誤…………..)

• Step2. 量測以下電壓有無輸出, 有無與GND短路

VREG_S3_1P35V
VREG_L3_1P15V
VREG_S1_1P15V
VREG_S4_2P1V
VREG_L6_1P8V
VREG_L10_1P8V
VREG_L2_1P2V
VREF_LPDDR2;
VREG_L20_3P075V
VREG_L20_3P075V
VREG_L20_3P075V
MSM_RESIN_N
PS_HOLD
VREG_L8_1P8V
VREG_L17_2P95V
VREG_L21_2P75V
VREG_L18_2P95V
VREG_S2_1P05V

• Step3. check 19.2MHZ(X901) frequency 是否正常

• Step4. 照X-Ray檢查PMIC(U2), eMMC(U1401),

SOC(U1) & PoP Memory (U1001)是否有空焊或 是短路

• Step5. Reheat SOC (U301) & PoP Mem(U1001)以確認是否有無空焊

• Step6. update SW image, check 是否SW 沒燒錄好

• Step7. 如果電燈有起，有可能eMMC是空的，須請SW確認是否進入emergency download mode

eMMC issue

• eMMC(U1401)外觀是否有異常，若有異常可視情況換件

• 確認各個power domain供電狀況
– VREG_L17_2P95V 點位 C1404.1 --------------- 2.95V
– VCCQ_EMMC 點位 C1904.1 - --------------1.8V

Display issue

Display issue

• Check LCM 是否有接好

• Check LCM FPC是否損毀

• Check LCM connector (CON1601) 是否有歪斜,破裂,短路或空焊現象

• Check VCC_LCD2V85 點位 C2104.2是否有2.85V(有無對地短路)

• Check LCD_1V8 點位C2109.1是否為1.8V(有無對地短路)

• Check LCM 是否有接好

• Check LCM FPC是否損毀

• Check LCM connector (CON1601) 是否有歪斜,破裂,短路或空焊現象

• Check VCC_LCD2V85 點位 C2104.2是否有2.85V(有無對地短路)

• Check LCD_1V8 點位C2109.1是否為1.8V(有無對地短路)

• Check MIPI 訊號是否正常輸出(0.1V~0.3V)

• Backlight IC (PU8900) 使否有短路或空焊, 極性是否正確

• Check V_LED 點位PC8903.1是否為25.6V(有無對地短路)

• Check LCD_BL_EN點位PSR8901是否為High(3.3V)

• Check LED_PWN_R 點位PSR8902是否有 PWM output or Keep High

• Check P_BL_LX_S的點位PL8900.2是否有 PWM

LCD 線路&點位圖

LEDPWM

CON2101

FPC_CON_33P

112

2

334

4

556

6

778

8

9910

10

111112

12

131314

14

151516

16

171718

18

191920

20

212122

22

232324

24

252526

26

272728

28

292930

30

313132

32

33

33

SIED1

34

SIED2

35

LCD_1V8VCC_LCD2V85 VCC_LCD2V85V_LEDLCD_1V8

MIPI_LCM_CLKN[3]
MIPI_LCM_DP1[3]

MIPI_LCM_DN0 [3]

LCM_ID [4]

LED_FB[89]

RESET_INNO[6]

MIPI_LCM_DN1 [3]

MIPI_LCM_CLKP [3]

MIPI_LCM_DP0[3]

VCC_LCD2V85

C2105
1UF/6.3V

12

V_2P85_EMMC2

R2113
0Ohm

/LCD/

12

C2104

0.1UF/6.3V

1 2

V_1P80_VCCAON

R2114
0Ohm

/LCD/

12

LCD_1V8

VCC_LCD2V85

LCD_1V8

C2109
1UF/6.3V

12

LCD_1V8

LEDPWM

CON2101

FPC_CON_33P

112

2

334

4

556

6

778

8

9910

10

111112

12

131314

14

151516

16

171718

18

191920

20

212122

22

232324

24

252526

26

272728

28

292930

30

313132

32

33

33

SIED1

34

SIED2

35

LCD_1V8VCC_LCD2V85 VCC_LCD2V85V_LEDLCD_1V8

MIPI_LCM_CLKN[3]
MIPI_LCM_DP1[3]

MIPI_LCM_DN0 [3]

LCM_ID [4]

LED_FB[89]

RESET_INNO[6]

MIPI_LCM_DN1 [3]

MIPI_LCM_CLKP [3]

MIPI_LCM_DP0[3]

LCD BL 線路&點位圖

P_BL_OVP_3

30mil

20mil

PC8903
1UF/50V

12

PR8903
560KOHM

1 2

PC8904
1UF/50V

@/Power/

12

PC8905

0.1UF/50V

N/A

12

PC8902
10UF/6.3V

12

PL8900

10UH

PR8904
20KOhm

PD8901
PMEG6010CEH

2 1

PC8900
1UF/50V

12

GND

GND

GND

VSYS

V_LED

GND

GND

2X2

Vih=2V

P_BL_EN_3

P_BL_DIMC_10
P_BL_OVP_3

P_BL_LX_S

P_BL_OVP_3

30mil

P_BL_PWM_3

20mil

PC8903
1UF/50V

12

PR8903
560KOHM

1 2

PC8904
1UF/50V

@/Power/

12

PC8905

0.1UF/50V

N/A

12

PC8906

0.1UF/6.3V

@/Power/

12

PU8900

RT8511BGQW

06087-00070100

OVP

1

FB

2

DIMC

3

GND1

4

GND2

9

EN

8

PWM

7

VIN

6

LX

5

PC8902
10UF/6.3V

12

PL8900

10UH

0201

PSR8901

@

21

PC8901
1UF/6.3V

12

PR8904
20KOhm

1 2

0201

PSR8902

@

21

PD8901
PMEG6010CEH

2 1

PC8900
1UF/50V

12

GND

GND

GND

GND

GND

GND

VSYS

V_LED

VSYS

GND

GND

GND

LED_PWN_R 21

LCD_BL_EN 86

GND

Touch Panel issue

• Check CON1301 是否有破裂,短路或空焊

• Check TP 是否有連接好

• Touch IC (U1301) 是否有短路或空焊,

pin１位置是否正確

• Check D1V8點位R1313電壓準位是否為1.8V

• Check CON1301 是否有破裂,短路或空焊

• Check TP 是否有連接好

• Touch IC (U1301) 是否有短路或空焊,

pin１位置是否正確

• Check D1V8點位R1313電壓準位是否為1.8V

• Check A3V3點位R1304電壓準位為3.3V

• Check I2C_0_SDA, I2C_0_SCL電壓準位是否為1.8V

R1304
0Ohm

/HX8528/

1 2

C1312
10UF/6.3V

c0603

12

+3VSUS

A3V3

1 2

D1V8

V_1P80_AON

R1313
0Ohm

/HX8528/

1 2

V_1P80_VCCAON

TP 線路&點位圖

D1V8 A3V3

R1304
0Ohm

/HX8528/

1 2

C1312
10UF/6.3V

c0603
@/HX8528/

12

GND

+3VSUS

A3V3

C1316
10UF/6.3V

@/HX8528/

12

R1306
0Ohm

@/HX8528/

1 2

D1V8

GND

V_1P80_AON

R1313
0Ohm

/HX8528/

1 2

V_1P80_VCCAON

Camera issue

Rear Camera

• Check Rear Camera是否有插好

• Check CON2301置件是否有歪斜,空焊,短路或損毀

• Check VAND_CAM_2V8 電壓準位是否為2.8V

• Check Rear Camera是否有插好

• Check CON2301置件是否有歪斜,空焊,短路或損毀

• Check VAND_CAM_2V8 電壓準位是否為2.8V

• Check VDD_VCM_2V8 電壓準位是否為2.8V

• Check VDD_CAM_1V8 電準位是否為1.8V

Rear Camera 線路&點位圖

CON2301

1

1

3

3

5

5

7

7

9

9

11

11

13

13

15

15
17

2

2

4

4

6

6

8

8

10

10

12

12

14

14

16

16
18

MAIN_CAM_RST [4]

I2C_4_SDA [4]

CAM_MIPI_D0P[3]

CAM_MCLK_SOC [4]

VDD_CAM_1V8

CAM_MIPI_D0N [3]

VAND_CAM_2V8

CAM_MIPI_CLKP [3]

I2C_4_SCL[4]

CON2301

FPC_23P

12018-00540100

1

1

3

3

5

5

7

7

9

9

11

11

13

13

15

15

17

17

19

19

21

21

23

23

2

2

4

4

6

6

8

8

10

10

12

12

14

14

16

16

18

18

20

20

22

22

CAM_MIPI_CLKN[3]

MAIN_CAM_RST [4]

I2C_4_SDA [4]

CAM_MIPI_D0P[3]

CAM_MIPI_D1P[3]

CAM_MCLK_SOC [4]

VDD_CAM_1V8

CAM_MIPI_D0N [3]

VDD_VCM_2V8

CAM_MIPI_D1N [3]

VAND_CAM_2V8

CAM_MIPI_CLKP [3]

I2C_4_SCL[4]

CAM_ID[4]

Rear Camera 線路&點位圖

12

V_2P80_VPROG2

VAND_CAM_2V8

PSR2305

0Ohm

/Camera/

12

PSR2307

0Ohm

/Camera/

1 2

V_1P80_VPROG1

12

VDD_CAM_1V8

R2309
0Ohm

1 2

VDD_VCM_2V8V_2P85_EMMC1

C2316
1UF/6.3V

12

VAND_CAM_2V8

VDD_VCM_2V8

VDD_CAM_1V8

PC2305
10UF/6.3V

12

V_2P80_VPROG2

GND

VAND_CAM_2V8

PSR2305

0Ohm

/Camera/

12

PSR2307

0Ohm

/Camera/

1 2

V_1P80_VPROG1

PC2312
10UF/6.3V

12

GND

VDD_CAM_1V8

R2309
0Ohm

1 2

VDD_VCM_2V8V_2P85_EMMC1

C2316
1UF/6.3V

12

Front Camera

• Check Front Camera是否有插好

• Check CON2302 置件是否有歪斜,短路,空焊或損毀

• Check 週邊零件是否有缺件,破裂

• Check Front Camera是否有插好

• Check CON2302 置件是否有歪斜,短路,空焊或損毀

• Check 週邊零件是否有缺件,破裂

• Check VDD_CAM_1V8電壓準位是否為1.8V

• Check VAND_CAM_2V8 電壓準位是否為2.8V

Front Camera 線路&點位圖

CON2302

1

1

3

3

5

5

7

7

9

9

2

2

4

4

6

6

8

8

SIDE1

26

VAND_CAM_2V8

SUB_CAM_PWDN [4]

CAM_1_RST_N [4]

SUB_CAM_ID [4]

CAM1_CLK[4]

I2C_4_SCL[4]

CON2302

FPC_CON_25P

1

1

3

3

5

5

7

7

9

9

11

11

13

13

15

15

17

17

19

19

21

21

23

23

25

25

2

2

4

4

6

6

8

8

10

10

12

12

14

14

16

16

18

18

20

20

22

22

24

24

SIDE1

26

SIDE2

27

VDD_CAM_1V8

VAND_CAM_2V8

SUB_CAM_PWDN [4]

CAM_1_RST_N [4]

MCSI_1_DATA_DP [3]

SUB_CAM_ID [4]

MCSI_1_CLK_DP [3]

MCSI_1_DATA_DN [3]

MCSI_1_CLK_DN [3]

CAM1_CLK[4]

I2C_4_SCL[4]

I2C_4_SDA[4]

SADDR

Front Camera 線路&點位圖

V_2P80_VPROG2

VAND_CAM_2V8

PSR2305

0Ohm

/Camera/

12

VAND_CAM_2V8

PSR2307

0Ohm

/Camera/

1 2

V_1P80_VPROG1

VDD_CAM_1V8

VDD_CAM_1V8

PC2305
10UF/6.3V

12

V_2P80_VPROG2

GND

VAND_CAM_2V8

PSR2305

0Ohm

/Camera/

12

PSR2307

0Ohm

/Camera/

1 2

V_1P80_VPROG1

PC2312
10UF/6.3V

12

GND

VDD_CAM_1V8

USB issue

USB issue

• Check U1801 是否有歪斜,短路,空焊

• Check USB connector (U1101) 是否有歪斜,空

焊,空焊或損毀

• Check RN1101 是否有SMT不良

• Check U1801 偏壓

• Check U1801 是否有歪斜,短路,空焊

• Check USB connector (U1101) 是否有歪斜,空

焊,空焊或損毀

• Check RN1101 是否有SMT不良

• Check U1801 偏壓

+VDDIO_ULPI0 (1.8V),
+VBATA_ULPI0(3.3V) 輸出是否正常

USB 線路&點位圖

USB1_DN[18]

USB1_DP[18]

RN1101A0OHM

12

L1101

90Ohm/100Mhz

09G092090100

@/USB/

14

23

TVS1102

12

TVS1101

12

RN1101B0OHM

34

USB_VBUS

USB1_ID_CONN

USB1_DN_CONN
USB1_DP_CONN

U1101

MICRO_USB_5P

VBUS

1

D-

2

D+

3

ID

4

GND

5

P_GND1

6

P_GND2

7

P_GND3

8

P_GND4

9

SIDE1

10

SIDE2

11

USB1_DN[18]

USB1_DP[18]

RN1101A0OHM

12

L1101

90Ohm/100Mhz

09G092090100

@/USB/

14

23

TVS1102

EGA10402V05AH

@/USB/

12

TVS1101

EGA10402V05AH

@/USB/

12

RN1101B0OHM

34

USB_VBUS

GND

GNDGND

GND

USB1_ID_CONN

USB1_DN_CONN
USB1_DP_CONN

U1101

MICRO_USB_5P

VBUS

1

D-

2

D+

3

ID

4

GND

5

P_GND1

6

P_GND2

7

P_GND3

8

P_GND4

9

SIDE1

10

SIDE2

11

USB 線路&點位圖

R1801

0Ohm

@/ULPI/

1 2

BAT

+3VSUS

+VBATA_ULPI0

12

R1807

0Ohm

12

V_1P80_VCCAON +VDDIO_ULPI0

+VBATA_ULPI0 +VDDIO_ULPI0

R1804
0Ohm

12

R1801

0Ohm

@/ULPI/

1 2

C1801

2.2UF/6.3V

12

C1802

0.1UF/6.3V

12

BAT

+3VSUS

+VBATA_ULPI0

C1804

0.1UF/6.3V

12

R1807

0Ohm

12

V_1P80_VCCAON +VDDIO_ULPI0

Sensor issue

G-sensor

• Check G-sensor IC (U2502) 是否有歪斜,短路,空焊

• V_1P80_VCCAON電壓是否正常

• I2C_5_SCL和I2C_5_SDA是否有動作

• Check G-sensor IC (U2502) 是否有歪斜,短路,空焊

• V_1P80_VCCAON電壓是否正常

• I2C_5_SCL和I2C_5_SDA是否有動作

• 是否有受到撞擊或摔落

• 若上述都正常則可嘗試更換本體

R2506

r0402_short@

1 2

@

ACC_ADDR

ACC_ADDR

U2502

ADDR

1

SDA

2
3

8

GND3

9

VDD2

10

IO/VDD2

11

SCL

12

R2505
1KOhm

@/Sensor/

12

C2505

0.1UF/16V

12

VDD_GSENV_1P80_VCCAON

GND

VDDIO_GSEN

VDD_GSEN

VDDIO_GSEN

I2C_5_SDA[4]

I2C_5_SCL[4]

VDDIO_GSEN

G-sensor 線路&點位圖

R2506

r0402_short@

1 2

R2513

r0402_short@

1 2

0201

R2515

@

2 1

ACC_ADDR

ACC_ADDR

R2514

10KOhm @/Sensor/

1 2

U2502

KXTJ2-1009

ADDR

1

SDA

2

IO/VDD1

3

RSVD

4

INT5GND1

6

VDD1

7

GND2

8

GND3

9

VDD2

10

IO/VDD2

11

SCL

12

R2505
1KOhm

@/Sensor/

12

C2507

0.1UF/16V

@/Sensor/

12

C2506

0.1UF/16V

12

C2505

0.1UF/16V

12

GND

VDD_GSENV_1P80_VCCAON

GND

VDDIO_GSEN

VDDIO_GSENV_1P80_VCCAON

GND

VDDIO_GSEN

GND

VDD_GSEN

VDDIO_GSEN

I2C_5_SDA[4]

I2C_5_SCL[4]

VDDIO_GSEN

ACC_INT1[5]

ACC_INT1

02151-00040000

GND

Proximity sensor

• Check Proximity sensor (U2503)是否有歪斜,短路,空焊

• Check IR LED (LED2501 ) 極性是否正確

• PROXIMITY_I2C_SCL和PROXIMITY_I2C_SDA是否有動作

• Check Proximity sensor (U2503)是否有歪斜,短路,空焊

• Check IR LED (LED2501 ) 極性是否正確

• PROXIMITY_I2C_SCL和PROXIMITY_I2C_SDA是否有動作

• 是否有受到撞擊或摔落

• 若上述都正常則可嘗試更換本體

Proximity 線路&點位圖

VLEDC

ALS_INT#

C2515

0.1UF/6.3V

12

C2511

2.2UF/6.3V

12

T2503@/Sensor/

1

GND

GND

+

LED2501

INFRARED

12

+3VSUS_PROX

C2512
10UF/6.3V

@/Sensor/

12

+3VSUS_PROX

+3VSUS_PROX

+3VSUS_PROX

C l o s e t o L E D 2 5 0 1

Proximity sensor

I2C Address 0X1D

C2516
1UF/6.3V

@/Sensor/

12

R2518
56OHM

12

+3VSUS_LED

0201

R2508

@

2 1

R2517

0Ohm

/Sensor/

12

+3VSUS

0201

R2511

@

2 1

VLEDC

PRO_SEL

ALS_INT#

C2515

0.1UF/6.3V

12

C2511

2.2UF/6.3V

12

R2509
910KOHM

12

R2510

10KOhm

1 2

R2512

10KOhm

@/Sensor/

1 2

T2503@/Sensor/

1

U2503

PX3003B

VDD

1

GND

2

REXT

3

SEL

4

VLEDC

5

INT

6

SCL

7

SDA

8

GND

+3VSUS_PROX

GND

GND

GND

GND

PROXIMITY_I2C_SDA
PROXIMITY_I2C_SCL

I2C_5_SCL[4]

ALS_INT#[6]

I2C_5_SDA[4]

GND

GND

+

LED2501

INFRARED

12

+3VSUS_PROX

C2512
10UF/6.3V

@/Sensor/

12

+3VSUS_PROX

+3VSUS_PROX

U2504
RP114K281D5-T1

@/cost

VOUT1

1

GND1

2

CE

3

VDD

4

GND2

5

REXT

+3VSUS_PROX

+3VSUS_PROX

C l o s e t o L E D 2 5 0 1

R2516

0Ohm

@/Sensor/

12

Proximity sensor

I2C Address 0X1D

C2516
1UF/6.3V

@/Sensor/

12

+3VSUS

R2518
56OHM

12

VLEDC

+3VSUS_LED

PRO_SELREXT