42LV370S-ZB, 42LV3700-ZC, 42LV370S-ZC, 42LV375G-ZC, 42LV375S-ZC, 42LV375W-ZC (CHASSIS:LD12B) - LG TV Service Manual (repair manual). Page 73

Read LG 42LV370S-ZB / 42LV3700-ZC / 42LV370S-ZC / 42LV375G-ZC / 42LV375S-ZC / 42LV375W-ZC (CHASSIS:LD12B) Service Manual online

Checking order when there is no audio
① Check the contact condition of 24V connector of Main Board
② Measure the 24V input voltage supplied from Power Board (If there is no input voltage, remove and check the 
connector)
③ Connect the tester RX1 to the speaker terminal and if you hear the Chik Chik sound when you touch the 
GND and output terminal, the speaker is normal. 
Established 
date 
Electronics 6-3
Standard Repair Process Detail Technical Manual
Revised 
date 
2008. 2 . 1
LCD TV
Error 
symptom
Voltage and speaker checking method in case of audio error
Content
C. Audio error_
Wrecked audio/discontinuation/noise 
25/33 - 9/13
Page of 74
Display

Click on the first or last page to see other 42LV370S-ZB / 42LV3700-ZC / 42LV370S-ZC / 42LV375G-ZC / 42LV375S-ZC / 42LV375W-ZC (CHASSIS:LD12B) service manuals if exist.