LG / GOLDSTAR CB-29H40
Manual de Servicio

NO SOUND (PICTURE OK) (No AM Sound) NO Check the Audio signal of pin25 of IC604 normal (No NICAM or FM Sound) Check whether Sound system of MENU OSD is correct or not Incorrect

Check/Replace IC604

Yes

Correct

Set correct Sound system

Check the Audio signal of pin44 of ICN01 normal

Yes

Is the SIF signal of pin24 of IC604 normal

NO

NO Yes

Check/Replace IC101

Check AM line

Are the Audio signal of pin24, 25 of ICN01 normal?

NO

Yes

Check/Replace XN01, ICN01

Are the Audio signal of pin1, 9 of IC601 normal

NO

Yes NO

Check RO LO lines.

Check the voltage of Q601 Base.

0V Check/Replace Q601, IC101, Q602, D601, D602, R612, R614 Are the Audio signal of pin4, 6 of IC601 normal? NO

Yes

Check the voltage of pin7 of IC601

Check/Replace C614, C615, D603, D604, Speaker Yes Check/Replace IC601

NO

Check/Replace F802, D814, L801