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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Friday 14 February 2020

REPAIR / SERVICING TV LG 26LX2R-ZE

Technical description and composition of the LG 26LX2R-ZE TV, panel type and applicable modules. The composition of the modules.
LG
Model: 26LX2R-ZE
Chassis / Version: ML-051A
Panel: LC260WX2-SL03 TFT COLOR IPS WIDE (16-9)
Lamp backlight: 18 Lamp EEFL
T-CON: 6870C-0054B (SL) (03) LC260WX2-SL03-E11
Inverter (backlight): 6632L-0134C & 6632L-0135C
Power Supply (PSU): YP2632T REV: A.2 6871TPT316B PWB (PCB) ASSEMBLY POWER 26LX2R-ZE
PWM Power: I3002L (PFC), 7601 (8), MIC4428BM (8), PQ05DZ11 (5)
MainBoard: 6870TA88A62 & 6870TC77B61
IC MainBoard: FLI8532-LF
Tuner: TAEM-W103P
Control: 6710T00017B
Technical Specifications RZ-26LX2R
LG 26LX2R-ZE
General recommendations for repairing TV LCD
Possible malfunctions
- The LG 26LX2R-ZE TV does not turn on, does not respond to the remote control and the control panel buttons, does not light up or blink indicators.
Typically, with such manifestations, the defect is caused by faulty elements in the main power module YP2632T. Then we recommend that you measure its output voltages and, if they are absent, you should check the health of the power switches and rectifier diodes of the converters for possible short-circuit.
In case of breakdowns of semiconductors in the secondary circuits, the converter can usually work abnormally in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse often breaks.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke an excess of the maximum current or voltage. These can be circuits supplying the PWM controller, damping or frequency-setting circuits, or elements of OOS (negative feedback) in the stabilization circuit. PWM controllers (PWM) I3002L (PFC), 7601 (8), MIC4428BM (8), PQ05DZ11 (5), in the absence of external damage and short circuit between the terminals, are checked by replacing with obviously good ones.
- There is no image, there is sound, it is responding to the remote control. Or immediately after turning on for a second, the image may appear and immediately disappear.
The defect can be caused by problems in the nodes or elements of the backlight of the display, or in the power supply of the lamps or inverter. If all the electrolytic capacitors of the filter according to the power supply of the inverter are working, make sure that the lamps are working, then you need to check the converter keys and the secondary windings of the transformers.
Sometimes, for diagnostic purposes, it is necessary to disable the inverter protection. In such cases, special care must be taken during work, and the protection circuits should be restored immediately after the repair is completed.
- The TV does not turn on, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the 6870TA88A62 motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software). In some cases, to repair the MB board (SSB), it may be necessary to replace the chips - FLI8532-LF with new or obviously good ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
In the absence of tuning to the channels of on-air or cable television, you should make sure that the software is correct, as well as in accordance with the ratings of the supply voltages on the terminals of the TAEM-W103P tuner. It is also necessary to check the presence of pulses of data exchange between the tuner and the processor via the I2C bus using an oscilloscope.
Owners and users of the LG 26LX2R-ZE TV should remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!


SCHEMATIC MANUAL ---------------------------->LG 26LX2R-ZE Chassis ML-051A


 The appearance of MainBoard 6870TA88A62 is shown in the figure below:
6870TA88A62
The appearance of the power supply
Main features of the device LG 26LX2R-ZE:
Installed matrix (LCD panel) LC260WX2-SL03 TFT COLOR IPS WIDE (16-9).
The matrix control uses the Timing Controller (T-CON) 6870C-0054B.
To power the backlight used inverter 6632L-0134C.
The necessary supply voltages for all nodes of the LG 26LX2R-ZE TV are generated by the YP2632T power module or its analogs using I3002L (PFC), 7601 (8), MIC4428BM (8), PQ05DZ11 (5) microcircuits.
MainBoard - the main board (motherboard) is a 6870TA88A62 module, using FLI8532-LF chips and others.
The TAEM-W103P tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: LG.Philips LCD
Model: LC260WX2-SL03
Type: a-Si TFT-LCD, Panel
Diagonal size: 26.0 inch
Resolution: 1366x768, WXGA
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 575.769x323.712 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1200: 1
Display Colors: 16.7M (8-bit)
Response Time: 8/9 (Tr / Td)
Frequency: 60Hz
Lamp Type: 18 pcs EEFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
Posted By: FRANK at 02:08
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