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Troubleshooting 1: Cannot download the program 1. Check if Battery VCC is normal. 3.7V ~4.2V (If not,check U0301,R0219) 2. Check if CPU Core VCC is normal. 1.0V-1.3V C0306,C0329(If not, check U0301) 3. Check if DDR3 VCC is normal .1.5V C0426 (if not,check U0401) 4.
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Troubleshooting 2: Cannot Power on 1.Check if Battery is normal. 3.3~4.2V (if not, Please charger ) 2.Check if key is normal. SW1301 2.4-4.5V ( if not, check U0301,KEY FPC ) 3.Check if Backlight VCC is normal. C1512 9V ( if not, check U1521 ) 4.Check if TCXO working normally.
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Troubleshooting 3: Cannot Charge the device 1.Check if VBUS is higher than 4.4V C1401(if not, check CON1205, U1401) 2. Check if the battery is normal.3.7~4.2V. (if not, check U1401,U1402 ,L1401 ,change Battery)
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Troubleshooting 4 : Display Problems 1.Check if VCOM VCC is 3.6V(C1522) . if not, check U1522,R1550,R1560. 2.Check if AVDD VCC is 11V(C1557) . if not, check U1522,L1537. 4.Check if VGH VCC is 20V(C1518) . if not, check D1507,C1580. 5.Check if VGL VCC is -6.8V(C1592) . if not, check D1511,C1590. 6.
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Troubleshooting 5: Camera not working 1.Check if VCAM_AFPMU VCC is 1.5V(C1108) . if not, check U0301,R1105. 2.Check if VCAM_IOPMU VCC is 1.8V(C1110) . if not, check U0301,R1108. 3.Check if VCAMA_PMU VCC is 2.8V(C1112) . if not, check U0301,R1107 . 4. if all VCC is normal,please check Camera ,CON1102, EMI1102-EMI1105...
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Troubleshooting 6 : Capacitive touch screen problems 1,check if Capacitive touch screen FPC (J1502) connect fix well. 2.Check if VGP2 VCC is 3.3V(VR1506) . if not, check U00301. 3.Check if SCL0 VCC is 1.8V . 4.Check if Sda0 VCC is 1.8V . 5.Check if touch panel is damage.
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Troubleshooting 7 : audio problem 1. If SPK without sound ,check U0301,L0310,L0311,SPK Cable. 2. If stereo Handset without sound ,check EINT8_EARPHONE VCC is 1.8V(R0814),if not check BEAD0801,BAND0803,R0805,R0806,R0807,R0808, 0801. 3. If Handset Microphone without sound ,check R0801,R0802,R0803,R0804,C0805,C0806 4. If Earphone Microphone without sound ,check BEAD0804, R0810,R0811,U331...
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Troubleshooting 9 : Gsensor , T-FLASH ,SIM problem 1.If Gsensor without funtion , check U1304. 2.If T-Flash Card without funtion , check T-Flash card if damaged. 3.If SIM Card without funtion , check U1201 5PIN if 1.8V(c1202). If not check check SIM card if damaged.
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Troubleshooting 10 : GSM,WCDMA Part question 1.If GSM without funtion,check U0509,U0510,R0641,U1601,L0503,L0502,L0522,L0523,C0520,C0522, C0511.if above is ok,then check the antenna connect (con0601) if damaged. 2.If WCDMA 850MHZ without funtion,check U0505,U1601,U0606,C0525,C0526,C0527,C0624,C0605,C0607 3.If WCDMA 2100MHZ without funtion,check U0506,U1601,U0607,C0529,C0531,C0532,R0619,C0626 4.If WCDMA 900MHZ without funtion,check U0520,U1601,C0536,C0535,C0538,C0645,C0656,C0670 5.If WCDMA 1900MHZ without funtion,check U0508,U1601,C0539,C0540,C0542,U0609,R0626,C0646...
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Troubleshooting 11 : WIFI/BT/GPS/FM TX/FM RX problem 1.If WIFI/BT without funtion: a. check U0901 if working well. b. check if WF_PA_VDD (C0911) is 1.6V.if not ,check U0904 c. check if wifi antenna is connect well. 2.If GPS without funtion a. check U0901 if working well b.
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Troubleshooting 12 : OTG part problem 1.Check if Vbus is 5V(C1208). If not ,check U1201,Q1201,R1217, 2.Check if usb connector is damagede(CON1205)
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Troubleshooting13 : ATV problem 1.Check if DVDD_PMU VCC is 1.5V(C1012) . if not, check U0301,camera,U1001. 2.Check if VCAM_IOPMU VCC is 1.8V(C1011) . if not, check U0301, camera, U1001. 3.Check if VCAMA_PMU VCC is 2.8V(C1014) . if not, check U0301, camera, U1001.
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ASM Control Truth Table LMSP32QH-C10TEMP Sp8T VCTLA VCTLB VCTLC (TRX3)W_Band8 H (TRX4)W_Band1 L R0640 GGE_PA_LB_IN (TRX5)W_Band2 H (TRX6)W_Band5 H R0605 TX_L TX_H R0641 GGE_PA_HB_IN TRX2_1800 TRX1_900 R0608 BUS2 BUS5 L0607 22nH GGE_PA_MODE 3G_EXPAND VBAT [3,4,6,7,9,12,14,15] BUS0 [1] GGE_PA_EN BUS1 [1] 56pF TRXB8 C0620...
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Handset Microphone 1 VMIC Close to MIC Close to BB R0802 1.5K RES0402 C0801 10uF Earphone RECEIVER MICP0 100pF/50V/NPO C0802 Audio Jack MIC0801 MICN0 [2] R0803 SIDE2PINCA EINT8_EARPHONE VDD18_6575 1.5K RES0402 3 Stage:HPR 33pF/50V/NPO C0804 close to IC close to connector C0803 4 Stage:HPL 33pF/50V/NPO...
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