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Download LG CF25H30N docs - TV - Conventional CRT, LCD Projectors, TFT, Plasma, Big Screen, HDTV, Home theater - Service manuals, repair tips| File information: | | File name: | CF25H30N.part2.rar
[preview CF25H30N] new window | | Size: | 2238 kB | | Extension: | rar | | MD5 Checksum: | 5ed33d96140f4f127126a604925840f6 | | Mfg: | LG | | Model: | | | Original Chassis: | MC-74A | | Descr: | LG model CF25H30N TV
Chassis MC-74A
Service Manual | | Group: | > > > | | Uploaded: | 2008-11-29 11:09:12 | | User: | fzabkar | | Multipart: | 0 |
| Information about the files in archive: | | Decompress result: | OK | | Extracted files: | 3 | | File name | | Text | | Schematic - Main.pdf | | Service Sheet of MC-74A (1/2)
PART NO : 3854VA0018A-S1 DATE : Nov 24 ,'97
TP
TP1 J173
CVBS/LUMINANCE CHROMA AUDIO ADJUSTMENT TEST POINT
| | Schematic - Sub.pdf | | Service Sheet of MC-74A ( 2/2)
PART NO : 3854VA0018A-S2 DATE : Nov 24 ,'97
| | Troubleshooting.pdf | | TROUBLESHOOTING
NO PICTURE/ NO COLOR
Is the CVBS signal at pin6 of IC512 normal? Yes Is the CVBS signal at pin16 of IC201 normal? Yes Are the CVBS signal at pin13, 17 of IC512 normal? Yes Is the Y signal at pin28 of IC512 normal? Yes Are the R-Y, B-Y signal at pin29, 30, 31, 32 of IC512 normal? Yes Are the R,G,B signal at pin19, 20, 21 of IC512 normal? Yes Are there R,G,B signal at pin8, 9, 10 of IC511? Yes Check the IK signal at pin18 of IC512. Yes Check CPT Board.
No Check IC512.
No Check/Replace IC201.
No Check/Replace IC201, Q201.
No Check/Replace IC512.
No Check/Replace IC512, IC590, IC591.
No Check/Replace IC512.
No Check/Replace IC511.
No Check the IK Line CPT Board.
NO TELETEXT
Check the voltage 12V of CT75. Abnormal Normal
Check the 12V line to be correct.
Abnormal
Check the voltage of 5V line.
Check/Replace ICT75. No
4.8~ 5.2V Check if video signal is input at pin8 of ICT74.
No
Check if video signal is input at pin16 of IC201. Yes Check the CVBS line.
Yes C |
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