LG MC74ATS free download

File name MC74ATS.PDF

TROUBLESHOOTING NO PICTURE/ NO COLOR Is the CVBS signal at pin6 of IC512 normal? No Check IC512. Yes Is the CVBS signal at pin16 of IC201 normal? No Yes Check/Replace IC201. Are the CVBS signal at pin13, 17 of IC512 normal? No Check/Replace IC201, Yes Q201. Is the Y signal at pin28 of IC512 normal? No Yes Check/Replace IC512. Are the R-Y, B-Y signal at pin29, 30, 31, 32 of IC512 normal? No Check/Replace IC512, Yes IC590, IC591. Are the R,G,B signal at pin19, 20, 21 of IC512 normal? No Yes Check/Replace IC512. Are there R,G,B signal at pin8, 9, 10 of IC511? No Yes Check/Replace IC511. Check the IK signal at pin18 of IC512. No Check the IK Line CPT Yes Board. Check CPT Board. NO TELETEXT Check the voltage 12V of CT75. Abnormal Normal Check the 12V line to be Abnormal Check the voltage of 5V line. correct. Check/Replace ICT75. 4.8~ 5.2V No Check if video signal is input at pin8 of ICT74. No Check if video signal is Yes input at pin16 of IC201. Check I2C Bus lines. Check/Replace Yes (SDA, SCL) IC201. Check the CVBS line. OK No Check the R,G,B signal at pin15,16,17,19 of ICT74. Check/Replace ICT74, XT75. Yes No Check the R,G,B signal at