LG OM5541 Service Manual

There is no sound output in the MIC FUNCTION, repair the set according to the following guide. (6) IN THE MIC FUNCTION [ Solution ] Please check and replace IC203 on MAIN board and IC420 on front MIC board. [ How to troubleshoot (Countermeasure) ] 1) Check MIC_SIG signal, from JACK421, JACK422 to IC420 (Pin3) on front MIC board. 2) Check MIC_SIG signal from IC420 (Pin4) to CN423. � If no signal, check +5 V for IC420. If NG, replace it a new one. 3) Check MIC_SIG signal from CN423 (Pin4) to CN420. 4) Check if MCS_BCK, MCS_LRCK, & MCS_MCLK are entered from IC501 to ...

MLC3730 1.2/3.3V PWM TAS5548DGG PWM_MUTE PWM_RST MCS_LRCK/BCK/ DATA_OUT AMP TAS5631BPHD 12.288M AMP_PDN AMP_SD/OTW / PROTECT/ CLIP0(FRONT_AGL) 24M 32.768K S4308 Mic 1 Mic 2 ADC CS5346 PORTABLE TUNER AUX1 PTB_SENSE MCS_MCLK/LRCK/BCK ADC_DATA MIC_SENSE BT_TX/RX/RTS/ CTS/RST BT Module MB8811C0 EAT61876201 PNZ-EAJ58881201- CN039533-AP01 MC3401 u-COM MCS_TX/RX/CS VFD_CS/CLK/DO VFD Jog 4ea SPK_LED KEY1,2 / VOL_A/B FRONT1 SPK LED FRONT2 KST-MWOO4MV0-S71W EBL60720702 KEY3/DRV_VBUS2.0 LM37102D USB1.1 USB2.0 OTG 2.0_D+/D- 1.1_D+/D- IR VFD REMOCON Debu ...

1. ICs 2. CAPACITORS Designator PIN Number Description Part Site Specifi cation SPEC REAL VALUE CHECK LOC. IC101 48 IC,Microcontrollers R5F100GHAFB Supply Voltage(VDD) 3.10~3.50 3.28 L108 IC201 6,35,46 IC,A/D Converter CS5346 Core Supply Voltage(VDD) 3.13~3.46 3.27 C231 14 PLL Supply Voltage(VDDA) 4.8~5.2 5.03 C229 IC202 IN 5.6 VA IC,LDO Voltage Regulator TJ4220GDP-ADJ 6.5V ADJ 0W SOP R/TP 8P - TAE- JIN TECHNOLOGY CO., LTD. 5.6 V±0.2 5.65 - OUT 5VU 5 V±0.2 5.03 IC203 6 IC,A/D Converter AK5358 Supply Voltage(VDD) 4.8~5.2 5.03 C242 5 PLL Supply Voltage(VDDA) ...

4. NO SOUND There is no sound output by DIGITAL AUDIO AMP DAMAGE, repair the set according to the following guide. (1) BY DIGITAL AUDIO AMP DAMAGE (IN ALL FUNCTIONS) [ Solution ] Please check and replace IC700 on MAIN board. [ How to troubleshoot (Countermeasure) ] 1) Check PWM_FL± signals from IC601 to IC700 each input function. � If no signal, check if I2S audio signals are entered to IC601. 2) Check the following I2S signal flow. < I2S audio signal Interface > - MCS_BCK: IC501_Pin E1 --> IC601_Pin23 - MCS_LRCK : IC501_Pin D1 --> IC601_Pin22 (44.1 kHz) ...

of fire or electrical shock. PRINTED CIRCUIT BOARD DIAGRAMS 1. SMPS P.C.BOARD (BOTTOM VIEW) ...

FUNCTION CHECK Check JK200, TU500. NO YES Check IC201 (CS5346) Pin23, 24, 26, 27 input. YES YES Check IC201 (CS5346) Pin41 output data. YES YES Check IC201 Pin5: +3.3 V Pin14: +5 V. Check CN501 Pin7, 8: +5.6 V. NO NO Check IC501(MLC3700) input data. YES Check IC201 Pin5: +3.3 V, Pin6: High, Pin14: +5 V. Check IC201 Pin41: SDOUT, Pin42: SLCK, Pin43: LRCK, Pin44: MCLK. NO NO IC501(MLC3730) output data. Replace IC201. OK YES 3-21 ELECTRICAL TROUBLESHOOTIHG GUIDE ...

2 REMOCON 3 DGND 4 W LED 5 12 V 12.05 11.5 ~ 12.5 CN501 1 PVDD 46.7 43.7 ~ 48.3 2 PVDD 46.7 43.7 ~ 48.3 3 PVDD 46.7 43.7 ~ 48.3 4 DGND 0 5 DGND 0 6 DGND 0 7 5.6 VA 5.69 5.4 ~ 5.8 8 5.6 VA 5.69 5.4 ~ 5.8 9 DGND ...