LG TV Troubleshooting.   Remote Control Codes

LG CF21D70. When you turn on the TV, after 2-3 seconds it goes into standby mode. The reason is the breakdown of the 2N4148 (150V) diode according to the D408 circuit.

GOLDSTAR CKT-4905 TV does not turn on. At the output, instead of 115volts 40. Moreover, the voltage on the diode is normal, and after relay 40 The power supply unit works without additional overload sounds. The 115-volt diode gets very hot. When checking the secondary circuits, no suspicious parts are found. The capacitor C8075 160V \ 33Mkf turned out to be faulty. Checking the capacitance on the device showed that instead of 33 Mkf, only 0.23 Mkf, the leakage was 50 ohms. The defect is very common. I replaced the broken TDKS in TV LG: 154-375F, after which I observe a strange effect: service information (program number, menu lines) twitch vertically 2-3 cm, the main image is normal, if you reduce the SCREEN voltage on TDKS twitch stops, the brightness of the plot also affects. It turned out that the secondary voltage from the TDKS to the personnel supply was overstated - 29v instead of 24v. I put 3 diodes in series in this circuit and that's it.

TV LG CF-20D30, when turned on with the network button, blinks the LED on the front panel once and nothing more - the power supply unit did not start, there are no secondary output voltages. The culprit was the electrolyte in the STRS5707 strapping (it stands between the STRS radiator plates, C = 4.7μF * 50V), which lost its capacity to 1 μF.

Gold Star (LG) 21D16. The guys are overly clever in this model with stereo sound on an additional board and TDA2009A. In a number of boxes, after six months or a year of work, a problem appears in the form of a hoarse (farting) and weak sound. The most optimal solution to the problem, without replacing the microcircuit, turned out to be a hinge of 2 - 3 MΩ resistors between the input of the first and second TDA channels and + 12V.

TV LG-CF21D79, oversaturated color image b / w is not, as if there is no brightness signal. Replacing the TB1238BN video processor did nothing. The SECAM TA1275AZ microcircuit turned out to be faulty.

Matching Chassis Model on LG TVs Download

When using the remote control codes below, you will have to program the remote for use with your TV.

FOR PROGRAMMING LG TV ON A REMOTE REMOTE DEVICE - PRESS REMOTE IN THIS ORDER:

- Menu

- Settings

- Remote controller

- Remote control

- TV

- Enter the LG slide switch on the top of the TV, press and hold the SELECT & MUTE buttons

- Wait until the indicator flashes 4 times

- enter 10178 or correct the corresponding remote control code

- the button will turn off if the code is correct

- follow the instructions

- if the volume does not work, repeat and enter the code 11178 or correct the corresponding remote control code