LG EC490W CIRCUIT free download

File name EC490W_CIRCUIT.pdf

CIRCUIT DIAGRAMS 1. Power Circuit Diagram Power is dead. No power. D109, C120 are defective. BD101, R101 are defective. D102 is defective. No 12VA and 12V. No 5.3VA and 5.1V. D106 is defective. Switching dead. IC101 is defective. Power dead. F101 is defective. Power dead. IC102, IC103 are defective. NOTE : NOTE) Warning 1. Shaded( ) parts are critical for safety. Replace only NOTES) Symbol denotes AC ground. NOTE) Parts that are shaded are critical with specified part number. NOTES) Symbol denotes DC chassis ground. NOTE) With respect to risk of fire or NOTE) electricial shock. 2. Voltages are DC-measured with a digital voltmeter during TUNER mode. 3-30 3-31 2. Tuner, NICAM, A2 Circuit Diagram EE MODE(VIDEO) TU MODE (AUDIO) 3-32 3-33 3. A/V Circuit Diagram IC301 Pin70 is defective. PB COLOR Signal disappear. D301 or IC301