LG EAX31383101 Schematic

3-38 3-39

No Power
BD101, R101 is Defective

S/W Error
IC101, IC104 is Defective

Switching Error
IC102, IC103 are Defective

No Power
D102 is Defective

13VA No Power
D124 is Defective

No Power
F101 is Defective

3.8VA No Power
D127 is Defective

33V No Power
D126 is Defective

13VA No Power
D122 is Defective

5.3VA No Power
D123 is Defective

3.3V No Power
IC153 is Defective

2.5V No Power
IC154, D156 are Defective

12V No Power
IC155 is Defective

5V No Power
IC156 is Defective

PCB : EAX31383101

5.5VA No Power
D128 is Defective

1. POWER (SMPS) CIRCUIT DIAGRAM

CIRCUIT DIAGRAMS

WHEN SERVICIN G T HIS CHASSIS, UNDER NO
CIRCUMSTANCES SHOULD THE ORIGINAL DESIGN
BE MODIFIED OR ALTERED WITHOUT PERMISSION
FROM THE LG CORPORATION. ALL COMPONENTS
SHOULD BE REPLACED ONLY WI TH TYPE S
IDENTICAL TO THOSE IN THE ORIGINAL CIRCUIT.
SPECIAL COMPONENTS ARE SH ADED O N THE

SCHEMATIC FOR EASY IDENTIFICATION. THIS
CIRCUIT DI AGRAM MAY OCCASI ONALLY DIFFER
FROM THE ACTUAL CIRCUIT USED. THIS WAY,
IMPLEMENTATION OF THE LATEST SAFETY AND
PERFORMAN CE IMPROV EMENT CHANG ES INTO
THE SET IS NOT DELAYED UNTIL THE NEW SERVICE
LITERATURE IS PRINTED.

1. Shaded( ) parts are critical for safety. Replace only
with specified part number.

2. Voltages are DC-measured with a digital voltmeter
during Play mode.

IMPORTANT SAFETY NOTE :