K19 SMT Issue List

1.

K19 SMT Issue List
need Apple schematic, please contact to QQ:119827581
S

2.

Agenda
S Introduction
S Power Rail Measure
S Thermal Sensor Location
S SMT common Issue FA
S Conclusion

3.

Introduction
S CPU : 2.66/3M/1066MHz 2.80/3M/1066MHz 3.06/3M/1066MHz
S MEMORY : 2GB / 4GB / 8Gb 1067 MHz DDR3
S H.D.D : SATA 160 / 250 / 320 / 500 GB
S GPU : NVIDIA G9600
S V-RAM : HYNIX / SAMSUNG 256 / 512 MB
S LCD : LG / SAMSUNG 15 Inch

4.

Power Rail Measure(1/2)
S TOP side

5.

Power Rail Measure(2/2)
S Bottom side

6.

Thermal Sensor Location(1/4)

7.

Thermal Sensor Location(2/4)

8.

Thermal Sensor Location(3/4)

9.

Thermal Sensor Location(4/4)

10.

EG Video Controller 203 Fail FA
1.Verify GPU on socket
2.Run iTEST Video Controller 203 to verify VRam

11.

SMT common Issue FA
S K19 Proto/DVT/ENG/TQB Build Common Issue List
No boot without du, du, du sound
No boot with du, du, du sound
Trackpad function NG
LCD Display too dark
Can not boot to finder

12.

SMT common Issue FA
S K19 Proto/DVT/ENG/TQB Build Common Issue List
Can not mount the SD card
No display but can boot to finder
Can not found Ethernet
White Screen(Sometimes)
IG DAVDP Low Resolution Link Status Test fail

13.

SMT common Issue FA
S No boot without du, du, du sound(1/4)
1. Check PBUS and PP3V42_G3H, if no PBUS signal,
you can check U7000, if no
PP3V42_G3H signal , you
can check U6990

14.

SMT common Issue FA
S No boot without du, du, du sound(2/4)
2. If step 1 is okay then check S5 power rails(PP3V3_S5,
PP1V2R1V05_S5), if no PP3V3_S5, you can check U7201,
if no PP1V2R1V05_S5 signal, you can check U7750

15.

SMT common Issue FA
S No boot without du, du, du sound(3/4)
3. If step 2 is okay then check PM_SLP_S3_L and
PM_SLP_S4_L signals, they should be high level after
power on

16.

SMT common Issue FA
S No boot without du, du, du sound(4/4)
4. If step 3 is okay, suspect MCP ‘s problem and suggest
remove MCP to verify on the socket board

17.

SMT common Issue FA
S Can not boot with du, du, du sound(1/1)
1. Check there is a gap between J3100 and J3200 or no
2. Check which SO-DIMM
is NG or both
3. Measure impedance for
NG SO-DIMM

18.

SMT common Issue FA
S Trackpad function NG(1/3)
1. Check Trackpad power control circuit as below

19.

SMT common Issue FA
S Trackpad function NG(2/3)
1. Check Trackpad controller circuit as below

20.

SMT common Issue FA
S Trackpad function NG(3/3)
We found a L5801 solder issue in DVT build

21.

SMT common Issue FA
S LCD Display too dark(1/3)
1. Check F9800 and Check J9000 connector is okay or
no
2. If okay, then measure J9000.31~J9000.36 and make
sure they are high, meantime also measure J9000.38
~J9000.40 have exceeded 34 voltage

22.

SMT common Issue FA
S LCD Display too dark (2/3)
3. If step 2 is okay, then change L9701 due to high ESR of
L9701 will cause backlight to dark
4. If step 3 is okay, then check LCD_BKLT_EN and
LCD_BKLT_PWM signals from U9600 or no
5. If step 4 is okay, check F9800 is fine or no

23.

SMT common Issue FA
S LCD backlight driver(3/3)

24.

SMT common Issue FA
S Can not boot to finder(1/1)
1. Press command + V to see the booting status and
focus on where fail
point is

25.

SMT common Issue FA
S No display but can boot to finder(1/3)
1. Check LCD backlight button is ON or OFF
2. If step 1 is okay, then measure PP3V3_SW_LCD and
PPVOUT_S0_LCDBKLT signals (both of them are high
level in normal state)

26.

SMT common Issue FA
S No display but can boot to finder(2/3)
3. If step 2 is okay, measure LVDS_DDC_SEL_IG or LVDS_DDC_SEL_EG
LVDS_DDC_SEL_EG(either LVDS_DDC_SEL_IG or
LVDS_DDC_SEL_EG is high level)

27.

SMT common Issue FA
S No display but can boot to finder(3/3)
4. If above signal is abnormal, It could be GMUX or DDC
MUX problem, we can do swapped testing or verified
test on socket board

28.

SMT common Issue FA
S Can not found Ethernet(1/1)
- Check U3700 has solder issue
or not
- We found U3700 Pin7,8,9,10,11,
12 have tilt phenomenon in K19
TQB build.

29.

SMT common Issue FA
S Can not mount the SD card(1/1)
1. check system profile can catch
USB interface SD module or no
2. If yes, check J3500.14 (SD_CD_L)
-It should be high when insert SD
-It should be low without insert SD card
3. If no, check U3500

30.

SMT common Issue FA
S White Screen(Sometimes)(1/1)
- Check R7781(1V05s5_fb) is stuffed or not

31.

SMT common Issue FA
S IG DAVDP Low Resolution Link Status Test fail (1/1)
1. Retest
2. Re-set the DAV box
3. Change a new DP dongle

32.

contact
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