LG KG270 Service Manual - Page 91

7. CIRCUIT DIAGRAM 1 2 3 4 TP400 TP401 TP402 TP403 TP404 TP405 R400 NA R401 0 A C400 1p L400 2.2nH L401 22nH R403 0 ANT G2 G1 RF SW400 RF500 B C410 22p VC1 C VC2 C417 C418 27p 27p FL400 LMSP2PAA-575TEMP 9 IN GSM1800_1900TX 1 3 GSM1800_1900RX 6 7 VC_GSM850_900TX VC_GSM1800_1900TX 5 2 8 GND1 GND2 GSM850_900TX GSM850_900RX 4 10 GND3 D E 1 2 3 4 LGIC(42)-A-5505-10:01 5 6 7 8 9 10 AA TX_RAMP R402 1K C401 39p (50V,J,NP0) (16V,K,X7R) (10V,Z,Y5V) C403 12p C404 C402 0.01u 10u (2012) C405 33p C406 18p (50V,J,NP0) (50V,J,NP0) VBAT VBAT C407 27p C408 0.01u R404 0 R405 0 L402 NA C409 NA DCS_PCS_OUT VAPC 20 VBATT 17 VCC1B 6 VCC1A 2 R406 0 C411 C412 NA NA 15 DCS_PCS_OUT DCS_PCS_IN 3 11 EGSM_OUT 19 RSVD_GND U400 SKY77318 4 EGSM_IN ENABLE 18 21 P_GND BS 1 (50V,J,NP0) (16V,K,X7R) TXON_PA BS R407 0 R408 NA R409 NA GSM_OUT GND2 GND1 GND3 GND5 GND4 GND6 GND8 GND7 16 GND9 R410 0 14 13 12 10 9 8 7 5 C413 27p C414 27p C415 NA C416 NA C 2 3 5 10 G4 G3 G2 G1 4 I2 O2_2 6 O2_1 7 O1_2 8 1 I1 O1_1 9 FL401 B9308 PART_NO SFSB0001401 IN CASE OF GSM850/PCS1900 CHANGE THIS DUAL SAW FILTER TO PART_NO SFSB0001301 C419 3p L403 18nH C420 3p C421 3p C422 3p L404 5.1nH GSM_RXN GSM_RXP DCS_RXN DCS_RXP TP406 DEFAULT_BANDSEL D Section Designer Date 11/16 2006 Checked 2006 Approved 2006 Sign & Name KEE-OUN.PARK MODEL DRAWING NAME GB3_RADIO Sheet/Sheets 4/4 RF LG Electronics Inc. DRAWING NO. 5 6 7 VER-1.1 LG Electronics Inc. - 92 -