REPAIRING AND NOT THROWING AWAY

REPAIRING AND NOT THROWING AWAY

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!
Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

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Tuesday 3 March 2020

REPAIR / SERVICING TV LG 47LW575S

Technical description and composition of the LG 47LW575S TV, panel type and applicable modules. The composition of the modules.
LG LED
Model: 47LW575S
Chassis / Version: LD12C
Panel: LC470EUF (SD) (P1)
LED backlight: 3660L-0369A V6 EDGE FHD REV1.0 L-TYPE (R-TYPE)
T-CON: 6870C-0358A Ver 1.0; TPS65168, LG5820, TPS65194, BUF08630, 432RP
LED driver (backlight): PPW-LE42GD-0 (A) Rev 0.5
PWM LED driver: SW5508, SW5026
MOSFET LED driver: FDD850N10L, SDB5150D
Power Supply (PSU): EAX628654 rev 1.0
PWM Power: STR-A6059H
MainBoard: EAX64405501 (0) EBR73503647
IC MainBoard: CPU: LGE35230, Nand: TC58DVG3S0ETA, DDR: K4B2G1646C, H5TQ1G63DFR
Tuner: TDFQ -G031D
Specifications 47LW575S
LG 47LW575S
General repair guidelines for TV LCD LED
TV LG 47LW575S, like many other electronic devices, it is advisable to start repairing by inspecting all external and internal elements. According to some external signs of a change in the state of some elements, it is sometimes possible to make assumptions about the nature of the defect, as well as determine the further direction of the troubleshooting. Elements with visible damage, for example, capacitors swelled up after boiling the electrolyte, charred resistors in certain nodes of the circuit, as well as ring cracks in solders will help the master to guess the causes and possible consequences of the malfunction.
Failures of the EAX628654 rev 1.0 power supply module can be expressed in different ways, for example, LG 47LW575S does not turn on at all and the control lamps on its front panel do not light up and do not blink, there are no signs of operability. It is advisable to start the troubleshooting of the power supply module by checking the state of the electrolytic capacitors of the rectifier filters and the mains fuse. Defective capacitors should be replaced. If the mains fuse is broken, it is necessary to check first of all the power semiconductor elements - rectifier diodes and transistors, which are often found in such a state of breakdown.
If the power keys of the pulse converter are not equal, you should pay attention to other elements in their bundling, which may be the result or cause of their breakdown.
If the LG 47LW575S TV does not have an image, but there is sound, there may be a malfunction in the backlight circuits of the LC470EUF (SD) LED panel (P1).
To check the health of the LEDs, as well as contact connections in the ruler circuit, it is necessary to disassemble the panel.
To check the health in the LED circuit, it is better to use a current source with a maximum voltage of 200V. We do not recommend using any voltage sources for this purpose. You can check each LED individually with a simple Chinese multimeter (powered by 9 volts) in the P-N-junction test mode. If you connect the red probe of the multimeter to the anode of the LED, and the black to its cathode, then the LED will light up slightly.
Repair of the EAX64405501 (0) EBR73503647 motherboard should begin with the diagnosis and verification of all linear stabilizers and power converters of its microcircuits. Sometimes it may be necessary to update the software (software) - flashing FLASH or EEPROM.
If it is not possible to replace the MB (SSB) card, you need to check the health of its elements - CPU: LGE35230, Nand: TC58DVG3S0ETA, DDR: K4B2G1646C. Defective components should be replaced.
The malfunction of the TDFQ-6031D tuner is established after checking the software and all supply voltages at its terminals.
It should be remembered! Attempts to repair the TV LG 47LW575S, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!
Service manual / schematic diagram ----------------> LG Chassis LD12C; MODEL: 47LW570G, 47LW570S, 47LW579S-ZD, 47LW575S-ZC, 47LW573S 47LW573S-ZG SERVICE MANUAL.

PSU LGP4247-11SPL - FAN7930B, 3BR4765JZ, L6599AD, K10A60D, BYV29FX


 The appearance of the MainBoard EAX64405501 is shown in the figure below:
EAX64405501
EAX64405501 can be used in TVs:
LG 42LW575S (Panel LC420EUF (SP)(PX) L), LG 32LW575S (Panel LC320EUD (SD)(P1)), LG 47LW575S (Panel LC470EUF (SD)(P1)), LG 47LW650S 47LW650S-ZC (Panel LC470EUF (SD)(F1) ).
The appearance of the power supply
Main features of the device LG 47LW575S:
Installed matrix (LED-panel) LC470EUF (SD) (P1).
The matrix control uses the Timing Controller (T-CON) 6870C-0358A.
The LED driver PPW-LE42GD-0 (A) is used to power the backlight LEDs, it is controlled by the PWM controller SW5508, SW5026. As the power elements of the LED driver, keys of the type FDD850N10L, SDB5150D are used.
The necessary supply voltages for all nodes of the LG 47LW575S TV are generated by the EAX628654 power module, or its analogs using STR-A6059H microcircuits.
MainBoard - the main board (motherboard) is an EAX64405501 module, using CPU chips: LGE35230, Nand: TC58DVG3S0ETA, DDR: K4B2G1646C, H5TQ1G63DFR and others.
The TDFQ tuner -G031D provides TV reception and channel tuning.
Information from an alternative source:
LG 47LW575S Chassis LD12C
Panel Type (Matrix): LC470EUF (SD) (P1),
Motherboard: EAX64405501 (0) EBR73503647, K4B2G1646 x2, H5TQ1G63DFR, Tuner: TDFQ -6031D
T-con: 6870C-0358A Ver 1.0
PSU: P / N: EAX628654 rev 1.0, STR-A6059H
Additional technical information about the panel:
Brand: LG Display
Model: LC470EUF-SDP1
Type: a-Si TFT-LCD, Panel
Diagonal size: 47 inch
Resolution: 1920x1080, FHD
Display Mode: IPS, Normally Black, Transmissive
Active Area: 1039.68x584.82 mm
Surface: Antiglare (Haze 10%), Hard coating (2H)
Brightness: 350 cd / m²
Contrast Ratio: 1400: 1
Display Colors: 16.7M / 1.06B (8-bit / 8-bit + Dithering)
Response Time: 5 (G to G); 8 (MPRT)
Frequency: 120Hz
Lamp Type: WLED Without Driver
Signal Interface: LVDS (4 ch, 8/10-bit), 92 pins
Voltage: 12.0V
Posted By: FRANK at 02:44
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