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 2 September 2020

REPAIRING / SERVICING TV PANASONIC TX-26LE60P

Technical description and composition of the PANASONIC TX-26LE60P TV, panel type and modules used. The composition of the modules.
PANASONIC
Model: TX-26LE60P TX-26LE60PK
Chassis / Version: GLP21
Panel: T260XW02 V.8
Lamp backlight: 8 Lamp CCFL
T-CON: 05A09-1E T315XW01 V5 CTRL / T260XW02 V2 CTRL
Inverter (backlight): VIT71014.52 LOGAN REV: 2
MOSFET Inverter: AOD606
Power Supply (PSU): TNP8EPL50
PWM Power: F9222L
MOSFET Power: 2SK3767
MainBoard: TNP8EAL40 A 5
IC MainBoard: VCT 6973G B2 000, 24C32AN, TDA8931T
Tuner: TXN / BL50AFPS
TX-26LE60P Specifications
PANASONIC TX-26LE60P
General recommendations for TV LCD repair
Possible malfunctions
- PANASONIC TX-26LE60P TV does not turn on at all. No response to the remote control and front panel control buttons. Indicator lamps do not light up or flash.
In some of these cases, the main switching power supply, the TNP8EPL50 module, is faulty. It is necessary to measure its secondary output voltages, and if they are absent, check the power switches (2SK3767) and rectifier diodes in the converters for a short circuit.
In case of any breakdowns in the secondary circuits, the converter can operate in an emergency mode of a short circuit, and in the event of a short circuit in the power elements of the primary circuit, the mains fuse or the current sensor in the source of the key is often cut off.
Breakdown of power switches (MosFet) in switching sources is sometimes caused by malfunctions of other circuit elements, for example, in the circuits supplying the PWM controller, frequency setting or damper, as well as in the circuits of Negative Feedback (OOS) stabilization. PWM controllers (PWM) F9222L, if they do not have visible damage to the case and an outright short circuit between the terminals, are usually checked by replacing.
- There is no image, there is sound, it reacts to the remote control. Or the image may appear for a second when turned on and immediately disappear.
These manifestations can be triggered by the power module, or by defects in the inverter, as well as by skewed currents in the lamps due to their uneven wear. If all the electrolytic capacitors of the filter for the power supply of the inverter are in good working order, you should make sure that the lamps are in good condition, 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 protective circuits must be restored immediately after the repair is completed.
- The indicator blinks or is on constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the TNP8EAL40 motherboard should begin with checking the stabilizers and power converters required to power the microcircuits and the matrix. If necessary, you should update or replace the software (software). Often the MB (SSB) board needs to be replaced in the event of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - VCT 6973G B2 000, 24C32AN, TDA8931T and replace the failed chips with new ones. Some malfunctions can be associated with the use of BGA soldering technologies in modern Main Board. Typically, such defects are detected by local heating of the chip.
The TXN / BL50AFPS tuner malfunction is established after checking the software and all supply voltages at its outputs. The data exchange of the tuner with the processor via the I2C bus can be monitored with an oscilloscope.
We remind users again! Attempts to repair the PANASONIC TX-26LE60P TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
DOWNLOAD SCHEMATIC DIAGRAM  / SERVICE MANUAL   ------------------>    PANASONIC TX-26LE60P Chassis GLP21 for models    TX-32LE60F, TX-32LE60P, TX-26LE60F, TX-26LE60P


 MainBoard TNP8EAL40 is shown in the figure below:
TNP8EAL40
External view of the power supply
Main features of the PANASONIC TX-26LE60P device:
The matrix (LCD-panel) T260XW02 V.8 is installed.
Matrix control uses Timing Controller (T-CON) 05A09-1E.
The VIT71014.52 inverter is used to power the backlight lamps. The keys of the AOD606 type are used as the power elements of the inverter.
The formation of the necessary supply voltages for all nodes of the PANASONIC TX-26LE60P TV is carried out by the TNP8EPL50 power module, or its analogs using F9222L microcircuits and 2SK3767 power switches.
MainBoard - the main board (motherboard) is a TNP8EAL40 module, using the VCT 6973G B2 000, 24C32AN, TDA8931T and others.
The TXN / BL50AFPS tuner provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: AUO
Model: T260XW02 V8
Type: a-Si TFT-LCD, Panel
Diagonal size: 26.0 inch
Resolution: 1366x768, WXGA
Display Mode: VA, Normally Black, Transmissive
Active Area: 575.769x323.712 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 15/5 (Tr / Td)
Frequency: 60Hz
Lamp Type: 8 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V
PANASONIC TX-26LE60P TV with LCD T260XW02, 26 "(66 cm) diagonal in 16: 9 format. Contrast, as the ratio of maximum brightness to minimum, is 1200: 1.
The T260XW02 panel and TNP8EAL40 board firmware can display HD images at 1366x768 pixels for 720p graphics resolution (HD Ready). The input analog video signal can be processed in PAL, SECAM, NTSC systems. Graphic processing and formation of a digital signal picture occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i.
Speaker power 16 W (2x8 W) is provided by two speakers. NICAM STEREO sound processing system is used.
External interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, audio x2, S-Video, component, SCART x2, RGB, HDMI. A headphone output is provided for individual listening. To connect a computer or laptop, a VGA (D-Sub 15) connector is used that supports resolutions: 640x480, 800x600, 1024x768, 1280x1024, 1360x768.
The power consumed by the TV in operating mode from the network is 104 watts.
Dimensions: with stand 657x525x301 mm, without stand 657x473x107 mm.
TV weight: without stand: 14 kg.
Attention! The panel T260XW02 V.8 of the PANASONIC TX-26LE60P LCD TV is a rather expensive component.
Avoid impacts on glass and pressure on the surface of the screen to avoid irreversible damage to the LCD panel!
Posted By: FRANK at 05:59
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