LG Electronics 42LN548C/549C Check Commercial Features, External speaker8OHM, 1W, Single-End

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8. Check Commercial Features.

8.1. External speaker(8OHM, 1W, Single-End)

■External speaker and Oscilloscope

■Power only mode

(1)Connect external speaker(8 ohm) to speaker out port with phone jack on TV side as below.

(2)Check the Max. speaker output is 1W or not. Sine wave with 1KHz will be displayed.

8.2.IR OUT

< Equipment & Condition >

■Simple Jig (commercial check JIG)

■Power only mode

(1)Connect each other RS232C port on the Commercial Check JIG.

(2)Press any key on Service Remote-control.

(3)Check the LED status of the Check JIG.

-IR LED(OK condition: blinking) (LED #1)

Copyright ©	LG Electronics. Inc. All rights reserved.	- 15 -	LGE Internal Use Only
Only for training and service purposes

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Contents MODEL 42LP360H/361H 42LN548C/549C SERVICE MANUALREAD THE SAFETY PRECAUTIONS IN THIS MANUAL LED TVLGE Internal Use Only Only for training and service purposesCopyright LG Electronics. Inc. All rights reservedLeakage Current Cold CheckAntenna Cold Check SAFETY PRECAUTIONSGeneral Guidance Before returning the receiver to the customerElectrostatically Sensitive ES Devices SERVICING PRECAUTIONSRemoval IC Remove/ReplacementReplacement Small-Signal Discrete Transistor Removal/Replacement3. Test method SPECIFICATION4. Model General Specification 1. Application range1/4, 1/8, 1/16, 1/32 Symbolrate 4.0Msymbols/s to 7.2Msymbols/sDVB-T Guard IntervalBitrateMbit/s5.3. RGB Input PC - FHD Model 5. Video resolutions 2D5.1. Component Input Y, CB/PB, CR/PR 5.2. RGB Input PC - HD ModelPCDVI 5.3. HDMI InputPC/DTV3. Main PCB check process ADJUSTMENT INSTRUCTION1. Application Range 2. Designation3.3. EDID data After downloading, have to adjust Tool Option again3.1. ADC Process 3.2. EDID Download4. Total Assembly line process 4.1. White Balance adjustment3.4 Function Check 4.5. Outgoing condition Configuration 5. GND and HI-POT Test6. Model name & Serial number D/L 6.1. Signal Table7.2. CI+ Key Download 7. CI+ key download6.3. Method & notice 7.1. Communication Prot connection8. Check Commercial Features 8.1. External speaker8OHM, 1W, Single-End8.2. IR OUT TROUBLE SHOOTING GUIDE 1. Check the booting Voltage2. Digital TV Video 4. AV Video 3. Analog TV Video6. HDMI Video 5. RGB Video8. TV Audio 7. Audio of All iput10. RGB Audio 9. AV AudioBLOCK DIAGRAM S7LR2 LGE211A-T8Tuner DVB- T/C EXPLODED VIEW 2013 S7LR2 2012Copyright 2013 LG Electronics. Inc. All rights reserved Normal SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESFILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS VDDC+3.3VNormal780 mA FROM LIPS & POWER B/DPowerDET +1.5VDDRNTP-7500L IC501CONTROL IR & LED THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETICFOR FHD REVERSE10bit Change in S7LR LVDS51Pin LVDS Connector For FHD 60Hz 30Pin LVDS ConnectorFor CEC HDMI EEPROMHDMI1 HDMI2RS - 232C RS232CPC AUDIO HEADPHONERGB PC SIDE USBEAN61828901 S7LRDIVXMS10DDR256 DDR13331GHYNIXSFLASH SCART AUDIO MUTE REAR COMPONENT PHONE JACKF u l l S c a r tIC1800 EXTSPEAKERAMPSPEAKER OUT JACK EXTSPKPCMCI CI POWER ENABLE CONTROLCI Region Option name of this page CI SLOT because of Hong KongTDSS-G101D GP4RGLOBALTUNERBLOCKTU2602 TU2603