Technical description and composition of the PANASONIC TX-40ASR650 TV, panel type and modules used. The composition of the modules.PANASONIC LED
Model: TX-40ASR650
Chassis / Version: LA51
Panel: 98.40S08.1SE (98.40S08.001)
LED backlight: L5EDDYY00634
T-CON: 14Y_RA_EF12TA2MB4C2LV0.3
LED driver (backlight): integrated into PSU
PWM LED driver: BD9479FV (C0ZBZ0002164), NJW4840R (C0ZBZ0001936)
Power Supply (PSU): TNPA5914 1P
PWM Power: FA5760N (C0DBAYY01329), FA5696N (C0DBBYY00058)
MainBoard: TNPH1077 1A TXN-A1LKVE
IC MainBoard: MN2WS0280, 24C16, AN34043AA, D2837ER
Tuner: TDSA-G370D
Control: Remote: N2QAYB000829
TX-40ASR650 Specifications
PANASONIC TX-40ASR650
General recommendations for TV LCD LED repair
Possible manifestations of defects
- The PANASONIC TX-40ASR650 TV does not turn on, does not respond to the remote control and control panel buttons, the indicators do not light up or flash.
In such cases, the fault should be looked for primarily in the TNPA5914 power supply module. Its output voltages should be measured and, in their absence, the power switches and rectifier diodes should be checked for the probability of a short circuit in the converters.
In the event of diode breakdowns in the secondary circuits, the converter can operate in an emergency mode of short circuit without output voltages, and in the event of a short circuit in the power elements of the primary circuit, the mains fuse and / or the current sensor in the source of the key usually breaks 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) FA5760N (C0DBAYY01329), FA5696N (C0DBBYY00058), if they have no visible damage to the case and an outright short circuit between the terminals, are usually checked by replacing.
- There is no picture, but there is sound and reaction to the remote control. Or, for a second, the image may appear immediately after switching on.
The malfunction in most of these cases is found in the nodes and elements of the LED panel backlight. The reason for this may be an open circuit in the LED circuit, or a problem in stabilizing their power supply.
To test the LED strips, in order to open all the transitions of the LEDs, several tens of volts or more are needed, it is best to use a current source for such purposes. The breakage of several PN junctions connected in series cannot be detected with a multimeter or tester. In such cases, it is necessary to open the panel and check each LED. If your multimeter cannot open the LED junctions in forward bias, you can sometimes detect the presence of a protective zener diode PN junction by connecting the probes in the opposite direction. If the zener diode is cut off or broken in K / Z, then the LED is faulty and needs to be replaced.
- The TV does not turn on, does not respond to the remote control. The indicator blinks or signals the standby mode.
Repair or diagnostics of the TNPH1077 motherboard should begin with checking the stabilizers and power converters necessary 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 - MN2WS0280, 24C16, AN34043AA, D2837ER and replace the failed chips with new ones. Some malfunctions may be associated with the use of BGA soldering technologies in modern Main Board. Usually such defects are detected by local heating of the chip.
If the PANASONIC TX-40ASR650 has no picture, but there is sound, often the display backlight 98.40S08.1SE simply does not work. Moreover, in LED TVs, the LEDs inside the panel usually fail, less often the LED driver.
In such cases, you can see a barely noticeable image with a successful hit of external light on the screen.
Replacing the LEDs requires disassembling the 98.40S08.1SE LCD panel - a process that requires experience and qualifications from the master. We do not recommend doing such work on your own to the owners of TVs and craftsmen who do not have experience in repairing LCD panels
If there is no image, and the backlight is on, the screen becomes slightly lighter when turned on, and in an open TV you can see the light through the holes in the panel case.
In this case, the panel may also be faulty - damage to strips, loops, for example, as a result of moisture ingress after unsuccessful washing of the screen, the T-CON (Timing Controller) board may be faulty. But often the main board MainBoard TNPH1077 turns out to be faulty, a software failure is also possible.
Then, first of all, it is necessary to check the panel supply voltage, the fuses on the T-CON board, as well as the supply and reference voltages of the column and line drivers - VGH, VGL, Vcom.
If these measurements are within the normal range, it is necessary to trace the passage of LVDS signals from the MainBoard TNPH1077 with an oscilloscope, as well as synchronizing signals to the loops with drivers.
Flooded or unsuccessfully washed screens of LED-TVs can be restored, in about half of the cases, usually if significant damage has not formed in the cables and panel strips.
If you suspect a malfunction of the TDSA-G370D tuner, first of all, you need to make sure the software is correct, as well as the presence of the required supply voltage levels and pulses of data exchange with the processor via the I2C bus on the corresponding tuner pins.
Attention! Users and owners of TX-40ASR650 TVs who do not have the appropriate qualifications, knowledge and experience are strongly discouraged from attempting to repair themselves in order to avoid negative consequences that may lead to the complete non-repairability of the device.
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> PANASONIC TX-40ASR650 Chassis LA51 for TX-40AS640B, TX-40AS640E, TX-40ASR650
The MainBoard TNPH1077 is shown in the figure below:TNPH1077
External view of the power supply
The main features of the PANASONIC TX-40ASR650 device:
Installed matrix (LED-panel) 98.40S08.1SE (98.40S08.001).
Matrix management uses Timing Controller (T-CON) 14Y_RA_EF12TA2MB4C2LV0.3.
To power the backlight LEDs, a converter combined with a power supply is used, controlled by the PWM controller BD9479FV (C0ZBZ0002164), NJW4840R (C0ZBZ0001936).
The formation of the necessary supply voltages for all nodes of the PANASONIC TX-40ASR650 TV is carried out by the TNPA5914 power module, or its analogs using the FA5760N (C0DBAYY01329), FA5696N (C0DBBYY00058) microcircuits.
MainBoard - the main board (motherboard) is a TNPH1077 module, using the MN2WS0280, 24C16, AN34043AA, D2837ER and others.
The TDSA-G370D tuner provides reception of television programs and tuning to channels.
Display technologies: Panel type: LCD screen with LED backlight. Format: 16: 9. Clear Panel technology. Scan Backlight: 1200Hz Scan Backlight (Intelligent Frame). Viewing angle: 176 degrees
Imaging technology: Advanced dual-core processor. 3D support: Yes (active). 2D to 3D conversion. Supported media formats: AVI / MKV / WMV / MP4 / M4v / FLV / 3GPP / VRO / VOB / TS / PS, MP3 / AAC / WMA Pro / FLAC / Apple Lossless / WAV, JPEG / MPO.
Sound technologies: Surround mode: VR-Audio True Surround. Acoustic Systems: Full Range x 2. Sound Output: 20W (10 + 10). Reverse audio channel (input 2).
Sound modes: "Standard", "Music", "Atmospheric", "User".
Picture modes: "Dynamic", "Standard", "Cinema", "True Cinema", "Custom"
Input and output connectors (wired interface): SCART: 1 (back). Component Input: RCA jack x 1 (bottom). HDMI: HDMI 1 (side), 2 (bottom). USB: 2 (side; USB 2.0 x 2) Digital audio output (optical) SD: 1 (bottom). Headphone jack: 1 (side).
Modern LED TVs PANASONIC, currently sold on the Russian market, can be manufactured in the Czech Republic (Pilsen). Their quality and reliability are quite high, according to their status and price.
We recommend that you treat PANASONIC TVs from a low price category assembled in Belarus and China with some caution ...
PANASONIC TX-40ASR650 TV with LCD display 98.40S08.1SE, diagonal size 40 "(102 cm) 16: 9 format. The LCD panel of the TV is equipped with direct backlighting with rear LEDs - Direct LED.
There is support for 3D images with active (shutter) separation technology of the right and left channels.
The 98.40S08.1SE panel and TNPH1077 motherboard firmware provide HD and Full HD viewing at 1920x1080 pixels in 1080p (Full HD) graphics.
The TX-40ASR650 TV is equipped with SMART software, built-in applications and the ability to work on the Internet. Internet connection can be made via Wi-Fi wireless connection. 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, 1080p. Multimedia file formats supported by the video processor: MP3, WMA, MPEG4, MKV, JPEG.
The power of the acoustic audio system is 20 W (2x10 W) provided by two speakers. NICAM STEREO sound processing system is used.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, component, SCART, RGB, HDMI x3, USB x2, Ethernet (RJ-45), Bluetooth, Wi-Fi. 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, 1920x1080.
The digital tuner is capable of receiving terrestrial and cable channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
Attention! The 98.40S08.1SE (98.40S08.001) panel of the PANASONIC TX-40ASR650 LED TV is its most expensive element.
Do not allow any impact on the glass and pressure on the screen surface to avoid damage to the LED panel!
It is unsafe for liquid to spill onto the screen. Sometimes one drop is enough if it drips down the glass onto the cables to make the TV unrepairable.