LG B2050 Service Manual - Page 71
Circuit Diagram
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VCC 2 1 IN 3 GND 4 . TROUBLE SHOOTING CIRCUIT DIAGRAM 2V8_VEXT 2V8_VEXT C221 1u DATA15 DATA14 DATA13 DATA12 DATA11 DATA10 DATA09 DATA08 2V8_VEXT ADD00 _MIDI_CS _RD _WR _MIDI_RESET 13MHZ _MIDI_IRQ R233 NA R237 0 U203 ML2871HB F2 IOVDD ROUT C2 LOUT A2 D4 D7 D5 D6 D6 E6 D5 D4 E5 F6 D3 F5 D2 D1 E4 D0 DVDD B1 B2 DGND P0_PWMA E1 C6 P5_VIB AOUT B3 C224 E3 F3 ILE E2 CS RD F4 D1 WR RESET MIXIN A3 B4 MIXOUT VREF A1 C228 1u SPOUT+ A6 C222 1u 0.022u R224 20K R229 39K C226 0.022u D3 IFSEL F1 CLOCK D2 IRQ C1 VREGC SPOUT- B6 SPVDD A4 B5 SPGND1 SPGND2 C3 SPGND3 C4 C5 SPGND4 VBAT C232 10u C229 C231 C233 C234 47p 47p MIDI_VIBRATOR R227 10K C225 0.022u U204 NLAST4599DFT2 R230 NA REC_P 5 COM 0.015u R235 5.1K 0.015u R239 5.1K AMP_EN R242 56K C230 NA R238 56K U206LM4890LD 5 IN- VO1 6 4 IN+ VO2 10 1 SHUTDOWN 2 BYPASS VDD 8 C236 1u 7 NC1 9 NC2 GND1 3 GND2 11 VBAT SPK_N SPK_P C235 10u VBAT SPK_P C220 10u SPK_SEL REC_P U202 NLAS4684MR2 1 V+ 10 NO2 2 NO1 9 COM2 3 COM1 8 IN2 4 IN1 7 NC2 5 NC1 6 GND C299 NA SPK_N REC_N CN200 1 2 C298 NA - 70 -