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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Thursday, 13 February 2020

REPAIR / SERVICING TV LG 26LG3050-ZA

Technical description and composition of the LG 26LG3050-ZA TV, panel type and applicable modules. The composition of the modules.
LG
Model: 26LG3050-ZA
Chassis / Version: LD84A
Panel: V260B1-L03
T-CON: LC260WX2-SLE1 (6870C-0145B) LGDP4801A M12L16161A-5T TPS65161
Inverter (backlight): 6632l-0438B
PWM Inverter: OZ9966SN A393F
MOSFET Inverter: FDD8447L PPW-EE26NC-L KE 090206
Power Supply (PSU): OPVP0059 REV: J EAY40503202
PWM Power: STR-W6253, L6599D (PWM Resonant), UCC28051 (PFC)
MOSFET Power: K4100, 2SK3528
MainBoard: EAX56818401 (0) (EBR48904604)
IC MainBoard: LGE7363C-LF, HY5DU561622FTP-4, 25L3205DM2I, NTP-3000A, MAX3232C
Tuner: EBL42367001 TDFV-G135D
Control: MKJ40653802
Specifications 52LG5030
LG 26LG3050-ZA
General recommendations for repairing TV LCD
LG TV, made on the LD84A chassis, like many other electronic devices, it is advisable to start repairing by inspecting all external and internal elements. Sometimes, based on visible changes in the components of the device, it is possible to draw some conclusions and determine the direction of further troubleshooting even before the necessary measurements are taken. 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.
In the case when the 26LG3050-ZA does not turn on, does not respond to the remote control and the front panel buttons, does not blink bulbs and does not show any signs of operability, the OPVP0059 REV: J (EAY40503202) power supply module is probably faulty in this case. If it is serviceable with such manifestations, it is necessary to check the stabilizer (converter) of the processor power supply on the motherboard. If there are no swollen filter capacitors of the secondary rectifiers, the diagnostics of the power supply should be started by checking the fuse and, if it is broken, it is necessary to check all power semiconductor elements first primary circuit - diodes and transistors K4100 2SK3528 for the likelihood of an avalanche or thermal breakdown.
Power switches in switching power supplies (SMPS) fail extremely rarely for no reason and, if they are broken, it is necessary to look for a malfunction in the stabilization circuits by checking electrolytic capacitors, semiconductor devices, and resistors in the primary circuit. The reason may be a malfunction of the PWM controller chip STR-W6253 L6599D UCC28051, which can only be checked by replacing it with a new or obviously working one.
If the LG 26LG3050-ZA has no image, but there is sound, there is a possibility of a malfunction of the backlight or power converter. You should also make sure that the electrolytic capacitors of the secondary rectifiers of the common power supply are working. Turning off the protection for diagnostic purposes, it must be remembered that in this case there is a risk of failure of the power elements of the inverter. Upon completion of the diagnosis, all regular protection circuits should be restored.
In cases of attempts to repair the motherboard EAX56818401 (0) (EBR48904604), it is necessary to check the operability of the stabilizers or power converters of its microcircuits and, if possible, update the software (software). BGA chips can in most cases be diagnosed by local heating. In some cases, it is necessary to check or replace (if necessary) the elements of the MB board (SSB) - LGE7363C-LF, HY5DU561622FTP-4, 25L3205DM2I, NTP-3000A, MAX3232C, tuner EBL42367001 TDFV-G135D. In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
It should be remembered! Attempts to repair the LG 26LG3050-ZA TV, 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!


SCHEMATIC MANUAL --------------------------------> LG 26LG3050, 26LG3050-ZA Chassis LD84A


 The appearance of the MainBoard EAX56818401 is shown in the figure below:
EAX56818401
EAX56818401 can be used in TVs:
LG 26LG3050-ZA (Panel V260B1-L03), LG 32LG3000 (Panel LK315T3LZ94), LG 32LG3200 (Panel LC320WXN (SA) (A2)).
The appearance of the power supply
Main features of the device LG 26LG3050-ZA:
Installed matrix (LCD panel) V260B1-L03.
The matrix control uses the Timing Controller (T-CON) LC260WX2-SLE1.
To power the backlight, an inverter 6632l-0438B is used, it is controlled by the PWM controller OZ9966SN A393F. As the power elements of the inverter, keys of the type FDD8447L PPW-EE26NC-L KE 090206 are used.
The necessary supply voltages for all nodes of the LG 26LG3050-ZA TV are generated by the OPVP0059 power module or its analogs using the STR-W6253, L6599D (PWM Resonant), UCC28051 (PFC) microcircuits and power switches of the K4100, 2SK3528 type.
MainBoard - the main board (motherboard) is an EAX56818401 module, using LGE7363C-LF, HY5DU561622FTP-4, 25L3205DM2I, NTP-3000A, MAX3232C, and others microcircuits.
The tuner EBL42367001 TDFV-G135D provides the reception of television programs and tuning to channels.
Information from an alternative source:
LG 26LG3050-ZA Chassis LD84A
Panel Type (Matrix): V260B1-L03,
Motherboard: EAX56818401 (0) (EBR48904604), Processor - LGE7363C-LF, SDRAM - HY5DU561622FTP-4 (x2), FLASH - 25L3205DM2I (x2), EEPROM - 24512W6, Audio - NTP-3000A, HDMI35 datasheet1; -232 - MAX3232C, Tuner - EBL42367001 TDFV-G135D
T-con: LC260WX2-SLE1 (6870C-0145B), LGDP4801A, M12L16161A-5T, TPS65161
Inverter: 6632l-0438B, OZ9966SN, A393F, FDD8447L (x4), PPW-EE26NC-L KE 090206 (x2)
PSU: OPVP0059 REV: J (EAY40503202), STR-W6253, L6599D & K4100 (x2), PFC: UCC28051 & 2SK3528 Remote control: MKJ40653802
Additional technical information about the panel:
Brand: CMO
Model: V260B1-L03
Type: a-Si TFT-LCD, Panel
Diagonal size: 26.0 inch
Resolution: 1366x768, WXGA
Display Mode: TN, Normally White, Transmissive
Active Area: 575.769x323.712 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 800: 1
Display Colors: 16.2M (6-bit + FRC), CIE1931 72%
Response Time: 3/5 (Tr / Td)
Frequency: 60Hz
Lamp Type: 12 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
Posted By: FRANK at 02:34
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