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

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

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

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Power Rail Measure(1/2) TOP side

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Power Rail Measure(2/2)

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Thermal Sensor Location(1/4)

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Thermal Sensor Location(2/4)

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Thermal Sensor Location(3/4)

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Thermal Sensor Location(4/4)

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EG Video Controller 203 Fail FA

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SMT common Issue FA 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

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SMT common Issue FA 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

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SMT common Issue FA 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

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SMT common Issue FA 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

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SMT common Issue FA 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

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SMT common Issue FA 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

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SMT common Issue FA 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

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

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

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

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SMT common Issue FA 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

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SMT common Issue FA 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

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SMT common Issue FA

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

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SMT common Issue FA 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)

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SMT common Issue FA 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)

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SMT common Issue FA 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

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SMT common Issue FA 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.

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SMT common Issue FA 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