LG TV 32LA615V repair

Device information

32LA615V TV


LG LED
Chassis / version: LD31B

Panel: LC320DUE (SF) (U2)

LED backlight: 6916L-1107A, 6916L-1108A

T-CON: 6870C-0452A, LC500DUE-SFR1

PWM LED Driver: MAP3202 (MAP3202SIRH)
Drive driver MOSFET: FDT86106, AP18N20GH

Power Supply (PSU): EAX64905001 (2.6) - LGP32-13PL1 EAY62810301
Motherboard: EAX64891306 (1.1) EBR76922719


 Flash: MX25L8006E,

Sound: STA380BWF
Тuner: TDSQ-G601D (B)
Remote control: IR: EBR77031901 RSD7CG000P
When the TV is turned on and no LEDs are lit on the front panel

And if the TV does not respond to the remote control (the remote) and the buttons, and does not make any sounds or any signs of operation when it is turned on, there is a high possibility that the problem is in the power supply unit (Power), whose number is EAX64905001 (2.6) then the feeding efforts of the screen must be measured And to try to repair. By examining the main transistors and the state of the electrolytic (chemical) capacitors, the damaged and swollen capacitors should be replaced with a new one. It is advised to check thoroughly when tracking any malfunction, and above all, check the electrical elements of semiconductors, transistors and modules for the transformer and the high-voltage uniformity circuit in the input, as well as the large capacitor that softens the input voltage.
As a rule, SMPS transistors are reliable enough and rarely malfunction without any reason to look for by examining other circuit components - capacitors, resistors and semiconductor elements in the primary circuit or the input circuit. PWM AISI is verified by replacing it with a known good one.

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In cases where the LG 32LA615V TV lost its image, the sound was present and all other functions are working properly, there is a possibility of a LED backlight malfunction in the LC320DUE (SF) (U2).


When turning on the TV, the image may briefly appear and disappear. It should be borne in mind that this malfunction indicates that there is a malfunction in the same LED rulers that carry LED number 32 FHD ROW2.1 Rev1.0 2 A1-TYPE 6916L-1107A / 1108A.
In the event of a malfunction in the LED rulers or backlight, the entire screen needs to be dismantled, and the LEDs are tested and the damaged ones are changed


To reduce the backlight current in televisions with the LGP32-13PL1 power supply (EAX64905001), you can increase the value of the resistors R822-R829, from 3.9 ohms to 4.3 ohms ............

The screen is off, but the stand by any light flashes. In such a case, if the power circuit is working properly and all efforts are intact and have no problem, the problem may be in updating the program or the so-called flash copies of the screen. Before that, you must check the CPU elements and make sure that there are no Short or short in the main board around the following components

 LGE2121-MS, DRAM: H5TQ2G63DFR, Flash: MX25L8006E, AUDIO: STA380BWF

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In cases where there is no tuning for the local TV channels, you must check the program (flash version), as well as the presence of the voltage on the ends of the tuner, which has the number TDSQ-G601D (B).
Owners and users of LG 32LA615V TV must remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that may lead to the inability to fully repair the device

 Download the Data Sheet for the main board

 

 LG CHASSIS: LD31B; 32LA61**, 32LN61**-Z* SERVICE MANUAL

Download Data Sheet Power Strip
 LG LGP32-13PL1, LGP32I-13PL1