LG CLY112TW TROUBLE free download

File name CLY112TW_TROUBLE.pdf

ELECTRICAL TROUBLESHOOTING GUIDE 1. Power Circuit(SMPS) (1) No 5.3VA. No 5.3VA. YES NO Replace the F101 Is the F101 normal? (Use the same Fuse). YES NO Is the BD01 normal? Replace the BD101. YES NO Is the R101 normal? Replace the R101. YES Does the oscillation waveform appear at NO Is Vcc(about 15~19V) permittable at the the IC101 Pin 1? IC101 Pin 4? YES NO Check or Replace the D103. NO Is there DC voltage at the IC101 Pin 4? Replace the IC102. YES NO Is there about 2.5V at the IC103 Vref ? Replace the IC103. YES NO Is the D106 normal? Replace the D106. YES Check the Main PCB 5.3VA/5.0V Line short? 3-2 7. Power Circuit(SMPS) (2) No 13VA. No 13VA. YES NO Does 5.3VA work normally? Check whether 5.3VA is out of order. YES NO Is the D109 normal? Replace the D109. YES Check 13VA/12VA Line of the Main PCB short. (3) No 12VA. No 12VA. YES NO Does 13VA work normally? Check whether 13VA is out of order. YES NO Is the D151, D153 normal? Replace the D151, 153. YES Check or Replace the Motor Vcc. 3-3 7. Power Circuit(SMPS) (4) No 5V. No 5V. YES Is 5.3VA put into the Q153/Q155 collector? YES NO Is the Q156 Base "H"? Check the Power Control. YES Is about 5.5V put into the NO Does the 13VA Line work normally?