User manual LG 24EA53VQ-P

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Manual abstract: user guide LG 24EA53VQ-P

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[. . . ] 7 4. 4 LCD display trouble. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 4. 5 Camera Trouble. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82 4. 6 Receiver & Speaker trouble. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84 4. 7 Microphone trouble. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86 4. 8 Vibrator trouble. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87 4. 9 SIM & uSD trouble. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89 4. 10 Touch trouble. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92 4. 11 LCD LED trouble. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93 4. 12 Trouble shooting of Receiver part. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94 4. 13 Trouble shooting of Transmitter part. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 4. 14 Trouble shooting of WI-FI/BT/FM part. . . . . . . . . . . . . . . . . . . . . . . . . . . . . PERFORMANCE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2. 1 H/W Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2. 2 Technical Specification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3. [. . . ] The phase/frequency signal is further on processed by the Sigma-Delta modulation loop. The output of its associated VCO is divided by four or two, respectively, and connected via an output buffer to the appropriate single ended output pin. The 8PSK transmitter supports power class E2 for GSM850 and GSM900 as well as for DCS1800 and PCS1900. The digital transmitter architecture is based on a polar modulation architecture, where the analog modulation data (rectangular I/Q coordinates) is converted to digital data stream and is subsequently transformed to polar coordinates by means of a CORDIC algorithm. The resulting amplitude information is fed into a digital multiplier for power ramping and level control. The ready processed amplitude signal is applied to a DAC followed by a low pass filter which reconstructs the analog amplitude information. The phase signal from the CORDIC is applied to the Sigma-Delta fractional-N modulation loop. The divided output of its associated VCO is fed to a highly linear amplitude modulator, recombining amplitude and phase information. The output of the amplitude modulator is connected to a single ended output RF PGA for digitally setting the wanted transmit power. The PA interface of SMARTi-PM supports direct control of standard dual mode power amplifiers (PA’s) which usually have a power control input VAPC and an optional bias Figure 3-33 Transmitter part block diagram control pin VBIAS for efficiency enhancement. In GMSK mode, the PA is in saturated high efficiency mode and is controlled via its VAPC pin directly by the baseband ramping DAC. RF input and output ports are internally matched to 50ohm to reduce the number of external components Extremely low leakage current(2. 5uA) maximizes handset standby time. Band select(BS) circuitry select GSM transmit frequency band(logic0) and DCS/PCS transmit frequency(logic1). MODE circuitry selects GMSK modulation (logic0) or EDGE modulation(logic1). VRAMP controls the output power for GMSK modulation and provides bias optimization for EDGE modulation depending on the state of MODE control. The integrated multi-function(MFC) provides envelope amplitude control in GMSK mode, reducing sensitivity to input drive, temp, power supply, and process variation. In EDGE mode, the MFC configures the PA for fixed gain, and provides the ability to optimize the PA bias operation at different power levels, This circuitry regulates PA bias conditions, reducing sensitivity to temp. , power supply, and process variation. The Enable input signal(pin8) provides a standby state to minimize battery drain. . . Table 3-16 PAM pin description LGE Internal Use Only - 72 - LG Electronics 72/143 Copyright © 2010 LG Electronics. TECHNICAL BRIEF 24EA53VQ-P Operational Description Revision A 3. 23 PAM Schematic VBAT L404 4. 7p 12 10 13 9 14 11 8 DCS_PCS_OUT GSM850_900_OUT BY_CAP1 BY_CAP2 GND1 GND2 GND3 PGND TX_EN GSM850_900_IN DCS_PCS_IN MODE_SELECT BS 1 2 3 4 5 6 7 R407 100P HBAND_PAM_IN PA_MODE S1_PA_BAND C428 0. 5p L406 3. 9p C433 8. 2n TQM7M5005H U402 VBATT VRAMP R403 10K R404 PA_LEVEL TXON_PA LBAND_PAM_IN C410 12n C417 22n C425 0. 01U C422 0. 01U 15 OK 100P C414 1u C437 33u C434 27P C441 100P C415 100P C420 47P C429 100P OK Figure 3-36 PAM schematic Copyright © 2010 LG Electronics. Only for training and service purposes - 73 - LGE Internal Use Only LG Electronics 73/143 LGE Property 4. TROUBLE SHOOTING 4. 1 Trouble shooting test setup Equipment setup Power on all of test equipment -Connect PIF-UNION JIG or dummy battery to the DUT for power up. -Connect mobile switch cable between Communication test set and DUT when you need to make a phone call. [. . . ] EMI_ESD Filter (100 Ohm, 7. 5pF) SMD , 3 TERMINAL EMI FILTER SMD , 3 TERMINAL EMI FILTER , , dB, dB, dB, dB, 4532 , IFX EDGE Quad Pin SMD , Pb-free_4ch_5p-100ohm-5p , ; , Filter, LCR SMD , Pb-free_4ch_5p-100ohm-5p , ; , Filter, LCR SMD , 1608 , EMI-ESD Filter, 4ch, 14V, 15pF, 100ohm 7 CN805 ENBY0053601 7 D201 EDSY0011901 7 D202 DIODE, SWITCHING EDSY0011901 7 D501 DIODE, SWITCHING EDSY0011901 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 D502 FB201 FB202 FB302 FB303 FB304 FB601 FB602 FB701 FL1 FL101 FL102 FL201 FL301 FL401 FL801 FL802 FL803 DIODE, SWITCHING FILTER, BEAD, CHIP FILTER, BEAD, CHIP FILTER, BEAD, CHIP FILTER, BEAD, CHIP FILTER, BEAD, CHIP FILTER, BEAD, CHIP FILTER, BEAD, CHIP FILTER, BEAD, CHIP FILTER, SEPERATOR FILTER, EMI/POWER FILTER, EMI/POWER FILTER, EMI/POWER FILTER, EMI/POWER FILTER, SEPERATOR FILTER, EMI/POWER FILTER, EMI/POWER FILTER, EMI/POWER EDSY0011901 SFBH0009201 SFBH0009201 SFBH0000912 SFBH0000912 SFBH0000912 SFBH0008101 SFBH0007102 SFBH0002302 SFAY0012001 SFEY0013701 SFEY0013701 SFEY0006501 SFEY0006501 SFAY0012001 SFEY0015501 SFEY0015501 SFEY0013201 LGE Internal Use Only - 180 - Copyright © 2010 LG Electronics. EXPLODED VIEW & REPLACEMENT PART LIST Level 7 7 7 7 7 7 Location No. FL804 FL805 L101 L102 L103 L104 Description FILTER, EMI/POWER FILTER, EMI/POWER INDUCTOR, CHIP INDUCTOR, CHIP INDUCTOR, CHIP INDUCTOR, CHIP Part Number SFEY0013201 SFEY0013201 ELCH0001430 ELCH0001430 ELCH0001430 ELCH0001430 Spec SMD , 1608 , EMI-ESD Filter, 4ch, 14V, 15pF, 100ohm SMD , 1608 , EMI-ESD Filter, 4ch, 14V, 15pF, 100ohm 100 nH, J , 1005 , R/TP , PBFREE 100 nH, J , 1005 , R/TP , PBFREE 100 nH, J , 1005 , R/TP , PBFREE 100 nH, J , 1005 , R/TP , PBFREE 10 uH, M , 3. 8*3. 8*1. 3 , R/TP , power inductor 750mA , ; , 10uH , 20% , . , 750mA , 0. 28 , ; , ; , SHIELD , 3. 8X3. 8X1. 3MM , [empty] , [empty] , Inductor, Wire Wound, Chip 10 uH, M , 3. 2*2. 6*1. 0 , R/TP , 100 nH, J , 1005 , R/TP , chip coil 100 nH, J , 1005 , R/TP , chip coil 100 nH, J , 1005 , R/TP , 100 nH, J , 1005 , R/TP , 100 nH, J , 1005 , R/TP , chip coil 15 nH, G , 1005 , R/TP , chip coil 4. 7 nH, J , 1005 , R/TP , chip coil 20 pF, 50V , J , NP0 , TC , 1005 , R/TP 4. 7 pF, 50V , C , NP0 , TC , 1005 , R/TP 15 nH, J , 1005 , R/TP , Pb Free 3. 9 pF, 50V , C , NP0 , TC , 1005 , R/TP 100 nH, J , 1005 , R/TP , PBFREE 5. 1 nH, S , 1005 , R/TP , 5. 1nH, 1005 100 nH, J , 1005 , R/TP , PBFREE 10 uH, M , 3. 2*2. 6*1. 0 , R/TP , 100 nH, J , 1005 , R/TP , PBFREE 10 uH, M , 3. 2*2. 6*1. 0 , R/TP , 100 nH, J , 1005 , R/TP , PBFREE 1. 5 nH, S, 1005, R/TP 4. 7 nH, J , 1005 , R/TP , chip coil 1 nH, S , 1005 , R/TP , MLCI 4. 3 nH, J , 1005 , R/TP , COIL Color Remark 7 L201 INDUCTOR, SMD, POWER ELCP0006811 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 L202 L203 L204 L301 L305 L306 L401 L402 L403 L404 L405 L406 L407 L408 L502 L504 L507 L509 L601 L602 L603 L604 L605 INDUCTOR, SMD, POWER INDUCTOR, CHIP INDUCTOR, CHIP INDUCTOR, CHIP INDUCTOR, CHIP INDUCTOR, CHIP INDUCTOR, CHIP INDUCTOR, CHIP CAP, CHIP, MAKER CAP, CHIP, MAKER INDUCTOR, CHIP CAP, CERAMIC, CHIP INDUCTOR, CHIP INDUCTOR, CHIP INDUCTOR, CHIP INDUCTOR, SMD, POWER INDUCTOR, CHIP INDUCTOR, SMD, POWER INDUCTOR, CHIP INDUCTOR, CHIP INDUCTOR, CHIP INDUCTOR, CHIP INDUCTOR, CHIP ELCP0006703 ELCH0001444 ELCH0001444 ELCH0005009 ELCH0005009 ELCH0001444 ELCH0012510 ELCH0009113 ECZH0000824 ECZH0000839 ELCH0001401 ECCH0000195 ELCH0001430 ELCH0003814 ELCH0001430 ELCP0006703 ELCH0001430 ELCP0006703 ELCH0001430 ELCH0001404 ELCH0009113 ELCH0003831 ELCH0009120 Copyright © 2010 LG Electronics. [. . . ]

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