LG KG280 Service Manual - Page 90

7. CIRCUIT DIAGRAM 1 2 3 4 5 6 7 8 9 10 2V8_VEXT 2V6_JACK U302 A 1 3 VDD VOUT JACK_LDO_EN R301 4.7K R302 100K C303 1u 4 NC 6 CE GND1 2 GND2 5 C304 R1114D251D 0.1u EUSY0299301 C305 C306 1u 15p EAR-MIC ECCH0004904 ECCH0000182 ECCH0004904 ECCH0000112 2V6_JACK 2V8_VEXT SLIDE C327 0.1u R317 51K SLIDE VDD 1 G1 OUT U304 A3212EELLT-T G2 C328 10p SIM_DATA 2V85_VSIM 2V85_VSIM SIM CONNECTOR A R315 15K C316 NA R303 J300 NA 9 GND4 GND3 GND5 GND2 8 10 6 IO CLK 7 3 5 VPP GND1 RST VCC 2 4 1 HSSC-6p-23 ENSY0014601 C317 C318 C319 220n 1000p NA SIM_CLK SIM_RST R305 B 1K EAR_MIC_IN FB302 0 EAR_MIC EAR_MIC R306 1.5K C309 C307 0.1u C308 R307 100ohm AUXIN 39p 22uF 2012 ECTH0004806 C313 C314 C315 R308 100ohm AUXIP 47n 27p 39p 2V8_VEXT C300 33 uF HEADSET_R 2V8_VEXT U300 ECTH0004804 C R300 0 6 1 SPK_SEL S B1 FM_AUDIO AUX_ON AUXON U301 2 NO1 IN1 5 5 VCC GND 2 HEADSET_R 10 NO2 IN2 7 HEADSET_EN R325 NA C302 1u 4A B0 3 NLAS4157DFT2G EUSY0263301 AUXOP C301 1u 1 VCC 11 6 PGND GND 3 COM1 9 COM2 4 NC1 8 NC2 MAX4764ETB USC5 MMI_PIN4 MMI_PIN5 USC4 USC5 R326 NA U300 SPK_SEL L STATE A-B0 H A-B1 U301 HEADSET_EN 0 STATE USC 1 HEADSET_SPK D VBAT VBAT VIBRATOR FM_ANT FL300 EVFC5S03Q033 C312 27p L300 100nH VCHARGE USC0 MMI_PIN4 MMI_PIN5 JACK_DETECT 9 1 INOUT_B1 INOUT_A1 8 2 INOUT_B2 INOUT_A2 7 3 INOUT_B3 INOUT_A3 6 4 INOUT_B4 INOUT_A4 G2 10 G1 5 SFEY0014701 2V8_VEXT VBAT R309 30K R311 30K CHG_DET R312 R313 R314 CN300 EAR_MIC_IN RPWRON DSR DEBUG_TX DEBUG_RX R316 10K DBUGTX DBUGRX USC2 FL301 USC1 EVFC5S03Q033 9 1 INOUT_B1 INOUT_A1 8 2 INOUT_B2 INOUT_A2 7 3 INOUT_B3 INOUT_A3 6 4 INOUT_B4 INOUT_A4 G2 10 G1 5 SFEY0014701 VA300 100K USC0_TP FB301 0 TX RX 100K 100K VA301 C321 C322 C323 C324 1608 2012 C326 C320 21 19 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 20 22 C 1 : FM_ANT 2 : AUDIO 3 : USC0 4 : USC4(RTS), EAR_L 5 : USC5(CTS), EAR_R 6 : USC2(TX_DATA) 7 : USC1(RX_DATA) 8 : JACK_DET 9,10 : BATT 11 : R/ON 12,13 : CHARGE 14 : DSR 15 : VUSB 16 : DEBUG_TX 17 : DEBUG_RX 18 : GND 30p 30p 0.1u 1u 2.2u 10u HSEJ-18S04-25R PG05DBTFC PG05DBTFC ENRY0006401 D VA303 EVLC18S02003 10V Over ECCH0005602 10V Over ECCH0003002 R319 0 R320 0 R318 47K Q300 R321 100ohm 10V Under ECCH0006201 4 VIBRATOR R322 20K 65 1 23 L301 OUT300 EMZ2 D300 C329 27nH E 1SS352-TPH3_F 4.7u L302 R324 7.5K C335 27nH OUT301 27p BAT CONNECTOR CN301 1 5 2 4 3 HSBC-3P-23 ENZY0014301 VA302 EVL5M02200 R323 1K C331 C332 C333 C330 27p 100u 1u 1u BATT_TEMP VBAT C334 1u ECZH0000826 10V Over 10V Under ECTH0005301 10V Over ECZH0000826 10V Under ECCH0004904 10V Under ECCH0004904 1 2 3 4 5 6 7 LGIC(42)-A-5505-10:01 LG Electronics Inc. Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes - 91 - LGE Internal Use Only