LG Electronics 37LC2D(B), 32LC2D(B), 42LC2D(B) service manual No image

Page 22

Manual background

No image	Is the	YES	Is the input cable	NO Attach the input
No image	Set ON?		attached?	cable(s)
	Set ON?		attached?	cable(s)
	NO		YES
	Push the POWER
	ON key		Check the		What is			Power Error
			Condition of all	PASS				Power Error
			Condition of all	PASS
			Connectors, wafers,		the input signal
			I2C In the		mode?			FAIL
			system.
						Check CVBS	FAIL	Check 3.3V
					AV4	Signal at R169		At L110 on jack
						on jack board		board
- 22 -						PASS		PASS
						PASS
		PASS	Check 24bit	PASS				Replace Jack Board
								Replace Jack Board
	Check LVDS				Check Main_V	Check Sub_V
	Check LVDS		RGB at AR700-		Check Main_V	Check Sub_V
	Output of Cortez		RGB at AR700-		At R309	At R302
PASS	Output of Cortez		AR705		At R309	At R302
			AR705

Check for S/W error	FAIL		FAIL		FAIL
Check for S/W error
	Replace Cortez				Check Q303
			Check Power		Check Q303	PASS
			Check Power		Circuit and 9V	PASS
			Levels and crystal		Circuit and 9V	Replace CXA2069
	PASS		Levels and crystal		at L300
					at L300

	Replace Hudson				FAIL	Correct the circuit
	Replace Hudson		FAIL			Correct the circuit
		Power Error

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Contents BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUALCHASSIS LD61A FACTORY NAME 32LC2DB-EC/37LC2DB-EC/42LC2DB-EC SERVICE MANUALPRODUCT SAFETY CONTENTSCONTENTS SPECIFICATIONGeneral Guidance SAFETY PRECAUTIONSIMPORTANT SAFETY NOTICE Leakage Current Hot Check circuitSERVICING PRECAUTIONS Electrostatically Sensitive ES DevicesSmall-Signal Discrete Transistor Removal/Replacement IC Remove/ReplacementReplacement Power Output, Transistor Device Removal/ReplacementSPECIFICATION 1.General SpecificationTV2. General Specification reatment of the front polarizer3.Optical FeatureLCD Module 4.Component Video Input Y, PB, PR6. RGB DTV INPUT Mode Table 5. RGB PC INPUT Mode TableRGB-PC EDID DATA 8. HDMI DTV Mode Table 7. HDMI INPUT Mode TableHDMI EDID DATA 32LC2D 7. Mechanical specification8. Mechanical specification Table 1 Scart Arrangement 1.Full ScartTable 2 Scart Arrangement 2.Half Scart 1. Application Range ADJUSTMENT INSTRUCTION2. Specification 3. Channel MemoryBefore AV ADC Calibration, should be executed the 5. Select method of Panel size6. ADC Calibration Panel size selectionCase1 EC and FC model use PAL-BGDHI composite signal 7. White BalanceBefore White-balance, the AV ADC should be done Cool11000K - x 0.274±0.003, y 0.286±0.003SVC REMOCON FUNTIONTROUBLESHOOTING No image Is the input cable attached?No image PASS No image No image No image No image No image AV4/S-Video L/R signal TROUBLESHOOTING AV1, 2, 3, 4/S-VideoVolume level Of AV1,AV2 ,AV3TROUBLESHOOTING DTV/HDMI-Audio TROUBLESHOOTING RF/Component/PC Wafer BLOCK DIAGRAMMainTDFB-G236P DVB/PAL FFC WaferCXA2069Q BLOCK DIAGRAMJackAUDIO/VI DEO SW Sound processorEXPLODED VIEW32LC2D 010 020050EXPLODED VIEW PARTS LIST32LC2D DESCRIPTIONEXPLODED VIEW37LC2D EXPLODED VIEW PARTS LIST37LC2D EXPLODED VIEW42LC2D 020080 130030 150 090EXPLODED VIEW PARTS LIST42LC2D MAIN BOARD REPLACEMENT PARTS LISTCAPACITOR DATE 2006. 05 DATE 2006. 05 DATE 2006. 05 DIODEs COIL & CORE & INDUCTOR TRANSISTOR RESISTORsDATE 2006. 05 DATE 2006. 05 DATE 2006. 05 DATE 2006. 05 OTHERs JACK BOARDDATE 2006. 05 DIODEs COIL & CORE & INDUCTORTRANSISTOR RESISTORsDATE 2006. 05 CONTROL BOARD SIDE A/V BOARD IR/LED BOARDPage Page Page Page Page P/NO 38289S0043 Printed in Korea