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Asus ZB551KL Training & Trouble Shouting Manual

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ASUS ZB551KL Board Level
Training&Trouble Shouting Guide

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  Summary of Contents for Asus ZB551KL

  • Page 1 ASUS ZB551KL Board Level Training&Trouble Shouting Guide...
  • Page 2 Outline and Chip Location...
  • Page 9: Block Diagram

    Block Diagram...
  • Page 11 I2C Arrangement & Power Architecture...
  • Page 12 I2C Address ZB551KL I2C Mapping Table Function Name Group LCM Gate Driver IC KTD2151 FL_I2C 0x3E 0111110 CCM FLASH LED Driver LM3644TTYFFR FL_I2C 0x63 1100011 ACCELEROMETER Sensor BMA250E SENSORS_I2C 0x18 0011000 e-Compass Sensor GMC303 SENSORS_I2C 0x0D 0001101 ALS and Proximity Sensor...
  • Page 13 Power On Sequence(PM8926)
  • Page 14 PMIC(PM8926)Voltage Table...
  • Page 15 Can’t Power On...
  • Page 16 Can’t Power On (BAT_Low and VBAT Connector related) • Measure battery voltage - if lower than 3.4V , Recharge the battery, waiting for Battery voltage > 3.7V,Recheck for power on. • If battery voltage > 3.7V,Can’t power on, check J1002 is poor soldering ?
  • Page 17 Can’t power on (Turn-on event ) • VPH_PWR exist and without press power key, Check PM_KYPD_PWR_N voltage should be 1.8V – Confirm U1101 appearance and X-ray,Try to re-heat U1101. • VPH_PWR exist and PM_KYPD_PWR_N with1.8V press power key, there should be PM_KYPD_PWR_N high to low transition –...
  • Page 18 Can’t Power on(XTAL OSC Related) • Power-on event exist and VREG_L12_1P8V without 1.8V output – Check U1101,R1203,C1202 • power-on event exist and, VREG_L12_1P8V with 1.8V,But Y1201 Pin 4 still no signal – Check R1203 • Y1201 Pin 4 with 1.8V,check XTAL_19M_IN with 19.2MHz or not ? –...
  • Page 19 Can’t Power On(U1101 PM8926 Related) • U1101 Power on sequence not complete – Check U1101 appearance and X-ray,iTry to re-heat or U1101 replacement • VREG_S1_1P15V/VREG_S2_1P15V/VREG_S5_1P15V without 1V voltage output – Check L1101, C1115, C1140, L1102, C1116, C1151, L1105, C1122 • VREG_S3_1P35V without 1.35V voltage output –...
  • Page 20 Can’t power on(eMMC Related) • Check U1601 eMMC device appearance and X-ray , Try to re-heat • Check R1609...
  • Page 21 Power on but no Display...
  • Page 22 No display(LCM Related I) • Replace a new LCM device to check function • Check CON11001 been damaged or poor soldering • After power on, VREG_LVS1_1P8V without 1.8V – Check U1101 appearance and X-ray, Try tore-heat – Check R11002 been damaged or poor soldering •...
  • Page 23 No Display(LCM Related II) • LCM_AVDD with 5V voltage and LCM_AVEE without -5V voltage. – Check U11001 appearance and X-ray,Try to re- heat or replacement. – Check L11002 been damaged or poor soldering – Check C12030, C12031, C11017, C11019, C11020 short circuit and poor soldering.
  • Page 24 No Display(BL Related I) • LCM_LEDA without 19V – Check U11002 appearance and X-ray, Try to re-heat or replacement – Check L11001/D11008 been damage or poor soldering – Check D11008 been damaged or reverse polarity mounted...
  • Page 25 No Display(BL Related II) • DISP_PWM0_1 no signal output – if CON11001 Pin 20 also no signal Check CON11001 been damaged or poor • soldering if CON11001 okay, then replace with a new • LCM device to check. Check U1101 appearance and X-ray, Try to •...
  • Page 26 Can’t Charge...
  • Page 27 Can’t Charge(1) USB Power not connected,TP1002 no 5V - Check USB Connector, Cable, Charger - Check compenont soldering quality C1011, R1013, C1001, D1000...
  • Page 28 Can’t Charge (2) Connect AC Adaptor, VCHG is not 0.6~11V - Check U1101 VREF_BAT_THERM is not ~1.8V -Check U1101...
  • Page 29 Can’t Charge (3) BAT_ID is not ~1.5V - Check Battery ID resistor weather around 300KΩ VBAT_THERM is not ~0.9V @25℃ -Check Battery THERMAL resistor weather around 10KΩ...
  • Page 30 Can’t Cable Power On...
  • Page 31 Can’t Cable Power On Check Charger function first If VPH_PWR voltage is correct - Check U0501 If no VPH_PWR voltage - Check U1101...
  • Page 32 Can’t HW Reset...
  • Page 33 Can’t HW Reset • Press power key ~10 sec,PM_RESIN_N keep at 1.8V level ,without release to low pulse – Check R1309 is Open ? – Check U1101 appearance and X-ray, Try to re-heat or replace a new device • PM_RESIN_N keep at 0V level –...
  • Page 34 USB Can’t Work...
  • Page 35 USB Can’t Work (1) USB_HS_DP and TP_1005 , USB_HS_DM and TP_1006 very close to short circuit – Check FL1000 • TP1007 USB_PWR without~5V - Check usb cable function Oaky ? – Check J1000 bad connection with cable? - Check C1011, R1013, C1001, D1000 short circuit toGND...
  • Page 36 USB Can’t Work (2) • After check circuit , cable and connector are oaky – Check U0501 appearance and X-ray, try to re-heat or replace a new device.
  • Page 37 OTG Can’t Work...
  • Page 38 OTG Can’t Work (1) Connect OTG SLAVE Device, PM_USB_ID Can’t Hi->Low - Check J1000.4 TP1007 with out 5V output - Check C1011, R1013, C1001, D1000 short to GND ? - Check U0501 appearance and X-ray,Try to re-heat or replace a new device...
  • Page 39 OTG Can’t Work (2) USB_HS_DP and TP_1005 , USB_HS_DM and TP_1006 very close to short circuit – CheckFL1000 After check circuit ,cable and connector are Oaky – Check U0501 appearance and X-ray,Try to re-heat or replace a new device.
  • Page 40 Touch Panel Can’t Work...
  • Page 41 Touch Can’t Work (1) • Check Touch Panel and Touch connector are corrected connected • VREG_LVS1_1P8V without ~1.8V - Check U1101 • VREG_L19_2P85V without ~2.8V - Check U1101 TP12003 (TS_RST_N) keep at LOW - Check TS_RST_N short to GND ?
  • Page 42 Touch Can’t Work (2) • TS_ID is 1.8V ? -Check R10026 Keep press Touch Panel, TS_INT_N should be High->Low pulse. -Check R11004 TS_I2C_SCL & TS_I2C_SDA without I2C data/clock waveform. -Check R0703, R0704...
  • Page 43 Sub Camera Abnormal...
  • Page 44 Sub Camera Abnormal (1) Power supply • 5M_DVDD_1V2 without 1.2V – Check U1101, B12002, C12002 • 5M_CAM_AVDD without 2.8V – Check U1101, C12006 5M_VDDIO_1V8 without 1.8V – Check U1101, C12004, B12001...
  • Page 45 Sub Camera Abnormal (2) Control Signal • CAM1_RST_N keep at LOW -Check U0501 • CAM_I2C_SDA/ CAM_I2C_SCK keep at LOW - Check U1001 CAM_I2C_SDA/ CAM_I2C_SCK Keep at HIGH, but without I2C Clock / Data waveform - Check R0705, R0706...
  • Page 46 Sub Camera Abnormal (3) Data signal If power and control signal are okay, check data signal • CCM_MCLK without clock signal -Check R12005,C12007,U0501 MIPI_CSI0_CLK_1, MIPI_CSI0_LN0_1 no signal -Check FL12001, FL12002...
  • Page 47 Main Camera Abnormal...
  • Page 48: Power Supply

    Main Camera Abnormal (1) Power Supply • VCAMD_PMU_1 without 1.2V – Check U1101, C12014, C12034 • VCAM_AF_PMU_1 without 2.8V – Check U1101, C12033, C12022, C12021 VCAM_IO_PMU_1 without 1.8V – Check U1101, C12019, C12020 • VCAMA_PMU_1 without 2.8V – Check U1101, C12017, C12016...
  • Page 49 Main Camera Abnormal (2) Control Signal • CAM_I2C_SDA/ CAM_I2C_SCK Keep at LOW -Check U1001 CAM_I2C_SDA/ CAM_I2C_SCK Keep at HIGH, But without I2C Clock / Data waveform - Check R0705, R0706...
  • Page 50 Main Camera Abnormal (3) Data Signal If power and control signal are Okay, check data signal • CAM_MCLK_13M without clock signal -Check R12030, U0501 MDN1..4, MDP1..4, MCP, MCN no signal -Check FL12007, FL12008, FL12009, F12010, FL12011...
  • Page 51 Main MICROPHONE Abnormal...
  • Page 52 Main MIC Abnormal (1) • MIC_BIAS1_Main without 1.8V – Check L899, C826, U1001 Blow air flow to mic device, MIC1_P_1/MIC1_M_1 no signal - Check mic device and, L815, C825 • PMIC_AUDIO_REF_CLK no signal – Check R410, U0501...
  • Page 53 Sub MICROPHONE Abnormal...
  • Page 54 Sub MIC Abnormal (1) • MIC_BIAS1_Sub without 1.8V – Check L808, C820, U1001 Blow air flow to mic device, MIC3_P_1/MIC3_M_1 no signal - Check mic device and U800, L812, C819 • PMIC_AUDIO_REF_CLK no signal – Check R410, U0501...
  • Page 55 E-Compass Abnormal...
  • Page 56 E-Compass Abnormal • • Check U1397(G-Sensor) power and signal are Oaky ? • • VREG_L19_2P85 without 2.8V • – Check U1101 • – Check U1397 Short circuit ? • • VREG_LVS4_1P8 without 1.8V • – Check U1101 • – Check U1101 short circuit ? •...
  • Page 57 Volume Key Abnormal...
  • Page 58 Volume Key Abnormal (I) • • First Replace J1401 & Replace a new SUB PCBA to Check function • • VOL_UP_KEY with 1.8V,but press Rear key vol up/ key can’t change to low • – Check J1401 • • VOL_UP_KEY is floating, Multimeter check is 0.6V,Oscilloscope check is 0V •...
  • Page 59 Volume Key Abnormal (II) • • PM_RESIN_N is 1.8V, But pressRear key vol down key can’t change low • – Check J1401 • • PM_RESIN_N is floating, Multimeter check is 0.6V,Oscilloscope check is 0V • – CheckU0501 • • PM_RESIN_N Short circuit to GND •...
  • Page 60 Vibrator Abnormal...
  • Page 61 Vibrator Abnormal • • VPH_PWR_N Can ‘t reach VPH_PWR’s voltage • – Check D813, C829 • • Press home key,PM_VIB_DRV_N Can’t change to 1.2V • – Check J4203 • – Remove D813, C829, Symptom the same,Check U1101 • • PM_VIB_DRV_N can reach VPH_PWR ‘s voltage ,PM_VIB_DRV_N can change to1.2V,...
  • Page 62 eMMC • • Check if R610.pin2 is 2.95V or not. • • Check if Dual_VCCQ_eMMC at R1601.pin2 is 1.8V or not. • • Check that SDC1_eMMC_CLK is 52Mhz and SDC1_eMMC_CMD, SDC1_eMMC_D0 are the high-low transition signals.
  • Page 63 SIM Card Test • • Check if VREG_L22, VREG_L23 is 2.85V/1.8V or not. • • Check if UIM1_RESET, UIM2_RESET is 2.85V/1.8V or not. • • UIM1_DET, UIM2_DET is H when the SIM card is inserted. • • Check if UIM1_CLK is 3.84Mhz and UIM1_DATA is a high-low transition signal.
  • Page 64 G-Sensor Test • • Check if R1396.pin2 is 2.85V or not. • • Check if R1397.pin2 shall is 1.8V or not. • • Check if SENSORS_I2C_SCL(R702.pin1) is 400Khz and SENSORS_I2C_SDA(R0701.pin1) is a high-low transition signal. • • Check if TP6302(ACCL_INT_N) is low when the sensor actives.
  • Page 65 Proximity Test • • Check if R1393.pin1(VREG_L19_2P85V) is 2.85V or not. • • Check if R1399.pin2 is 2.85V or not. • • Check if R1398.pin2 is 1.8V or not. • • Check if SENSORS_I2C_SCL(R702.pin1) is 400Khz and SENSORS_I2C_SDA(R0701.pin1) is a high-low transition signal.
  • Page 66 Speaker Test • • Check that the speaker(J805&J806) impedance is 8 Ohm. • • Check C700.pin1 is above 3.4V or not. • • Check C709.pin1 is above 3.4V or not. • • Removed speaker and playing sound then checking if C711.pin1 is sort of square ware or not.
  • Page 67 DTV test I • • Check if R16001.pin2(VPH_PWR) is above 3.4V or not. • • Check if R3537.pin1(DTV_1V8_EN_N) is 1.8V or not. • • Check if C3539.pin1(DTV_1P1V) is 1.1V or not. • • Check if C3538.pin1(DTV_1P8V) is 1.8V or not.
  • Page 68 DTV test II • • Check if R3520.pin2(DTV_RESET_N) is 1.8V or not. • • Check if C3517.pin1(VDDPLL) is activated or not. • • Check if C3520.pin1(VDDLDO) is activated or low. • • Check if C3523.pin1(VDDLRF) is activated or low. • •...
  • Page 69 Thank you...