Technical description and composition of the LG 47LM669 TV, panel type and applicable modules. The composition of the modules.LG LED
Model: 47LM669
Chassis / Version: LD22E
Panel: LC470EUG (PE) (F2)
LED driver (backlight): integrated into PSU; 67.2V 780mA
PWM LED driver: UC2843BD1 (Step-Up LED), AAT2430AISX, R5F100BCAFP
MOSFET LED driver: STF19NF20, PHT4NQ10LT * 6
Power Supply (PSU): EAX64744201 (1.5) - EAY62608902, LGP4247L-12LPB-3P
PWM Power: L6599AD (PWM Resonant), FAN7930BG (PFC), STR-A6059H (Standby), AP3843
MOSFET Power: STF13NM60N * 2, STF10NM60N * 2
MainBoard: EAX64307906 (1.0)
IC MainBoard: LGE2112, H26M21001ECR, H5TQ2G63DFR-PBC, AT24C256C
Tuner: TDSN-G351D EBL61080002
Specifications 47LM669T
LG 47LM669
General repair guidelines for TV LCD LED
In the absence of any signs of operability, when the LG 47LM669M does not turn on and does not signal anything with the control lights on the panel, there is a possibility of a malfunction of the EAX64744201 (1.5) TV power module. After checking the mains fuse and power elements of the primary power supply circuit, it should also check the absence of a short circuit in the loads of the secondary rectifiers.
If a breakdown of the power switch is detected, it should be remembered that in a switching power supply (IIP) it does not fail by itself for no reason that you should look for when checking other elements of the primary circuit - electrolytic capacitors, PWM controller A6059H, FAN7930BG, AP3843CM , L6599AD, which can only be checked by replacement, as well as other semiconductor elements (diodes, transistors, zener diodes).
Sometimes the LG 47LM669M TV does not have an image, but there is sound, or the image appears and immediately disappears. In this case, there is a possibility of a malfunction of the LED driver - power converter for the backlight LEDs of the LC470EUG (PE) panel (F2), or a break in the LED circuit is possible. In such cases, first of all, it is necessary to verify the operability of the electrolytic capacitors of the filter by supplying the backlight unit.
In most cases of lack of backlight, it becomes necessary to disassemble the panel in order to check the LEDs, connectors, loops and all contact connections. If one or several LEDs does not work in one line, therefore, they are broken and should be replaced.
When diagnosing, it is necessary to take into account that it is impossible to check the open in the chain of LED lines without disassembling the panels using a tester or multimeter. To open all PN junctions connected in series, a voltage of the order of several tens of volts is required, and ideally, a current source. By opening the panel, each LED can be checked separately. Typically, Chinese multimeters light up a single 3-volt LED, if you connect probes in the forward direction to it. In dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as a health indicator. In the event of a LED malfunction, its zener diode will either be cut off or broken into short-circuit.
On the EAX64307906 (1.0) motherboard, in case of a malfunction, you should first check the performance of all the stabilizers and power converters of the microcircuits, and also, if necessary, update the software (software).
In some cases, to repair the MB board (SSB), it may be necessary to replace the chips - LGE2112, H26M21001ECR, H5TQ2G63DFR-PBC, AT24C256C with new or obviously working ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
Before replacing the TDSN-G351D EBL61080002 tuner, if there is no channel setting, you must first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
Remember! Attempts at self-repair by users of the LG 47LM669M TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!
Service manual / schematic diagram ----------------> LG CHASSIS: LD22E; 47LM669/669S/669T, 47LM660S/660T-ZA, 47LM669S/669T-ZC SERVICE MANUAL
EAX64307906 (1.0) - LGE2112, H26M21001ECR, AT24C256C-SSHL-T, M24C16-R, H5TQ2G63DFR-PBC, TPS2554, TPS54331D, BD86180MUV, AOZ1038PI, TPS54319TRE, TPS54327DDAR, TPS54425PWPR, AZ4580MTR-E1, TPA6132A2, AP2132MP-2.5TRG1, TPS65198, R5F100GEAFB, TPS65178RSLR, STA380BW.
psu schematic diagram ----------------> LGP4247L-12LPB-3P - EAY62608902 - PLDF-L103B - EAX64744201 (1.3 - 1.5).
To reduce the backlight current in LED drivers with the AAT2430AISX controller, increase the resistance of the resistor from terminal 50 (ISET) to the housing, for example, from 3 KOhm to 4.7 KOhm. Currents will proportionally decrease in each of the 16 channels. With a parallel connection of channels, currents are summed.
The appearance of the MainBoard EAX64307906 is shown in the figure below:EAX64307906
EAX64307906 can be used in TVs:
LG 32LM640T ZA (Panel LC320EUA PE F2), LG 32LS570T (Panel LC320EUN (SE)(M2)), LG 47LM620S (Panel LC470EUE (SE)(F4)), LG 42LM670T (Panel LC420EUG(PE)(F2)), LG 42LM640T 42LM640S (Panel LC420EUG (PE)(F1)), LG 42LM620T (Panel LC420EUE (SE)(F1)), LG 47LM660T (Panel LC470EUG (PE)(F1)), LG 42LS570T (Panel T420HVN01.0), LG 42LS570S ZB (Panel LC420EUE (SE)(M1)), LG 42LM669T (Panel LC420EUG (PE)(F2)), LG 42LM669S (Panel LC420EUG (PE)(F1)), LG 37LM620T (Panel LC370EUN (SE)(F2)), LG 47LM669 (Panel LC470EUG (PE)(F2)), LG 32LS570S ZB (Panel LC320EUN (SE)(M2)), LG 47LM620T (Panel LC470EUE (SE)(F3)), LG 47LM761T ZA (Panel LC470EUH (PE)(F1), LG 32LM620S (Panel LC320EUN (SE)(F2) ), LG 47LM670T 47LM670T-ZA.BRUWLJU (Panel LC470EUG (PE)(F1)), LG 42LM660S 42LM660S-ZA.BRUWLJU (Panel LC420EUG (PE)(F1)), LG 42LM660T 42LM660T-ZA.BRUWLJU (Panel LC420EUG (PE)(F1) ), LG 32LM620T (Panel LC320EUN (SE)(F3)), LG 55LM620T 55LM620T-ZE (Panel LC550EUE (SE)(F1)).
PSU Advanced
The 47LM669 model uses the EAX64744201 power supply unit using the PFC (Power Factor Correction) node - an active filter of the highest harmonics of the current consumption. In fact, this is a boost converter based on the FAN7930BG PWM controller, which eliminates the charge current of the rectifier filter's electrolytic capacitor directly from the network through open diodes when its charging current is determined by its reactance.
As a result of the operation of the converter, the envelope of the high-frequency pulses of the input current of the converter will repeat the shape and phase of the input voltage. The health of the PFC node can be indirectly judged by the presence of an increased constant voltage (about + 380V) on the capacitor of the rectifier network in operating mode.
The appearance of the power supply
Main features of the device LG 47LM669:
Installed matrix (LED-panel) LC470EUG (PE) (F2).
To power the backlight LEDs, a converter is used, combined with a power supply unit, controlled by a PWM controller UC2843BD1 (Step-Up LED), AAT2430AISX, R5F100BCAFP. As power elements of the LED driver, keys of the type STF19NF20, PHT4NQ10LT * 6 are used.
The necessary supply voltages for all nodes of the LG 47LM669 TV are generated by the EAX64744201 power supply module or its analogs using L6599AD (PWM Resonant), FAN7930BG (PFC), STR-A6059H (Standby), AP3843 microchips and power switches of the STF13NM60N * 2, STF10NM60N * type 2.
MainBoard - the main board (motherboard) is an EAX64307906 module, using chips LGE2112, H26M21001ECR, H5TQ2G63DFR-PBC, AT24C256C and others.
The TDSN-G351D EBL61080002 tuner provides television reception and channel tuning.
Information from an alternative source:
LG 47LM669M Chassis LD22E
Panel Type (Matrix): LC470EUG (PE) (F2)
Motherboard: EAX64307906 (1.0), IC105: LGE2112, IC8100: H26M21001ECR (sticker: SAA35926602Ver.4.10.49), IC104: AT24C256C-SSHL-T, IC100: M24C16-R, IC701-704: H5TQ2303D TPS2554, IC4305: TPS54331D, IC4306: BD86180MUV, IC2400: AOZ1038PI, IC2403: TPS54319TRE, IC2404: TPS54327DDAR, IC2405: TPS54425PWPR, IC6000: AZ4580MTR002326 ICP61, IC6000: AZ4580MTR002016651, IC661, IC651, ICP65, IC6000, IC3200, IC3200 , IC7700: TPS65178RSLR, IC5800: STA380BW, Tuner: EBL61080002 TDSN-G351D
PSU: EAX64744201 (1.5), IC501: A6059H, IC801: GPCS2430A, IC701: 100BCA 241AZ0K, IC601: FAN7930BG, IC251: AP3843CM, IC101: LB599AD, 19NP20, 10NM60N x2, G41BT V5 x
Remote control: AKB73655833
