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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Wednesday 19 February 2020

REPAIR / SERVICING TV LG 32LK430

Technical description and composition of the LG 32LK430 TV, panel type and applicable modules. The composition of the modules.
LG
Model: 32LK430 ZG
Chassis / Version: LD01M
Panel: LC320WUN (SC) (A2) // T315HW04 V9
T-CON: 6870C-0318B_Ver0.7; TL2428MC, BUF08832, TPS65192, TPS65170, TPS62110
Inverter (backlight): 3PEGA20003A-R PNEC-D031 A REV-0.3
PWM Inverter: OZ9966SN
MOSFET Inverter: BA123L
Trans Inverter: T2-EF32-A 11A20F-BJ
Power Supply (PSU): EAX63985401 / 6 - LGP32-11P
PWM Power: L6599AD (PWM Resonant), 3BR4765JZ (Standby)
MOSFET Power: MDF6N60
MainBoard: EAX64272803 (0) // EAX64272802 (0)
IC MainBoard: CPU: LGE2111-t8, Nand SAA35750018, SPI FLASH: W25Q80BVS1G, Eeprom: AT24C256C, 24C08
Tuner: TDSS-G101D EBL61060001
Specifications 32LK430
LG 32LK430
General recommendations for repairing TV LCD
Repair of the LG TV with the LD01M chassis should begin with a careful external inspection of all its components and modules. Often by the external signs and nature of the damage to the elements, it becomes possible to draw some conclusions and determine a further algorithm for finding a defect before making the necessary measurements at control points. In some cases, faulty elements can be seen with the naked eye, for example, charred resistors or swollen metal-ceramic capacitors, or electrolytic in rectifier filters. Ring cracks formed in the soldered terminals of transformers or heating elements of the circuit are also frequent sources of many malfunctions with a variety of external manifestations.
Sometimes the LG 32LK430 TV just doesn’t turn on. No control lights on the front panel are lit or blinking, the TV does not respond to the remote control and does not make any sounds or any signs of life when turned on. The most likely cause of the malfunction is a failure of the common power module. If it is working properly, you need to check the processor batteries on the SSB (Main Board). When repairing the power supply, it is advisable to start the diagnostics by checking the mains fuse and the electrolytic capacitors of the filters of the converter secondary rectifiers. In the event of a fuse breaking, the reason should be sought in the power semiconductor elements of the pulse converter of the main power supply. First of all, it is necessary to check the diodes of the bridge of the rectifier of the mains voltage and the power switch (s) of the converter.
In most cases, key breakdowns in switching power supplies (SMPS) do not occur for no reason and you should look for other faulty circuit elements that could provoke a defect. This can be dried electrolytic capacitors in the primary circuit, and faulty damper elements, as well as dangling resistors or punched semiconductor elements in the stabilization circuits. Possible defective PWM chip from the manufacturer.
If the LG 32LK430 does not have an image, but there is sound and the TV is controlled by the remote control, a malfunction in the display backlight nodes is likely. The lamps or the power converter - inverter may be faulty. Often in such cases, when you turn on the TV, an image appears and immediately disappears. First of all, it is necessary to verify the operability of the electrolytic capacitors of the rectifier filter supplying the inverter, and check the LCD lamps by connecting external and obviously serviceable for diagnosis to the connectors. When diagnosing a malfunction of the inverter with the protection off, special precautions must be taken, because there is a risk of failure of the power elements of the inverter. After the diagnosis, it is imperative to restore the protection circuits for the inverter to operate normally.
If the EAX64272802 (0) motherboard is faulty, first of all it is necessary to check all the linear stabilizers or power converters of its chips, and also, if necessary, update the software. Sometimes you can check the health of MB only by replacement. In some cases, it is necessary to check or replace (if necessary) the elements of the MB board (SSB) - CPU: LGE2111-t8, Nand SAA35750018, SPI FLASH: W25Q80BVS1G, Eeprom: AT24C256C, 24C08. In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
Attention! For users and owners of 32LK430 TVs who do not have the appropriate qualifications, knowledge and experience, we strongly recommend against attempting self-repair in order to avoid negative consequences that could lead to complete non-repairability of the device.
SCHEMATIC MANUAL --------------------> LG CHASSIS: LD01M 32LK430/430A/430N/430U, 32LK430/430A/430N/430U-ZG SERVICE MANUAL


Composition EAX64272803(0)
LCE2111-T8, H5TQ1G63DFR X2, H27U168F2BTR  

sticker: SAA35750022 VER.3.01.12, 25Q80BVSIG, ATML H204 2EC L (AT24C256C), 24C08, NTP7400L, MAX3232C


 The appearance of the MainBoard EAX64272803 is shown in the figure below:
EAX64272803
EAX64272803 can be used in TVs:
LG 42LK450-TG (Panel V420H2-L05), LG 32LK430 ZG (Panel LC320WUN (SC)(A2)), LG 42LK430 (Panel LC420WUE (SC)(A2)), LG 42CS560 ZD (Panel LC420WUE (SC)(A3)), LG 32LV3400 ZG (Panel LC320EUN (SD)(V2)), LG 32CS560 (Panel LC320WUN (SC)(A2)), LG 32LK455 32LK455C (Panel EAX64272803).
The appearance of the power supply
Main features of the device LG 32LK430:
Installed matrix (LCD panel) LC320WUN (SC) (A2) or T315HW04 V9.
The matrix control uses the Timing Controller (T-CON) 6870C-0318B_Ver0.7 ;.
To power the backlight, an inverter 3PEGA20003A-R is used, it is controlled by the PWM controller OZ9966SN. A transformer T2-EF32-A 11A20F-BJ is installed in the inverter converter. As power elements of the inverter, keys of type BA123L are used.
The necessary supply voltages for all nodes of the LG 32LK430 TV are generated by the EAX63985401 power module or its analogs using L6599AD (PWM Resonant), 3BR4765JZ (Standby) microcircuits and MDF6N60 power switches.
MainBoard - the main board (motherboard) is an EAX64272803 module using CPU chips: LGE2111-t8, Nand SAA35750018, SPI FLASH: W25Q80BVS1G, Eeprom: AT24C256C, 24C08 and others.
Tuner TDSS-G101D EBL61060001 provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: LG Display
Model: LC320WUN-SCA2
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1920x1080, FHD
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 698.4x392.85 mm
Surface: Antiglare (Haze 10%), Hard coating (3H)
Brightness: 380 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M / 1.06B (8-bit / 8-bit + FRC), CIE1931 72%
Response Time: 5 (G to G)
Frequency: 60Hz
Lamp Type: EEFL Embedded (Inverter)
Signal Interface: LVDS (2 ch, 8/10-bit), 51 pins
Voltage: 12.0V
Posted By: FRANK at 07:23
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