Please note this service information for your service.
Model Model name Serial number range
LC-13S1E 835936 ~ 838287
LC-15S1E 865940 ~ 869096
LC-15S1E K 838474 ~ 842853
LC-15S1E RU 813393 ~ 814344
LC-20S1E 908084 ~ 915775
LC-20S1E K 830405 ~ 832794
LC-20S1E RU 816790 ~ 817484
Phenomenon Buzzing noise is heard from the speakers when the brightness is set to 'medium' or 'dark'.
Cause In the version △6 of tuner unit, the GND pattern of inverter circuit and the GND pattern of
audio circuit have been jointed. Due to this, a noise from the inverter circuit goes into the
audio signal through the GND line when the brightness adjustment is working.
Servicing When you service the set within the serial number above, which has the version △6 of tuner
unit, please modify the tuner unit as follows.
1. Cut a position of GND pattern.
2. Add a jumper wire (QCNW-D512WJQZ) between the L3301 and the pin 10 of IC3301.
For details, please refer to the figure in the next page.
