Technical description and composition of the PANASONIC TX-50CSR520 TV, panel type and modules used. The composition of the modules.PANASONIC LED
Model: TX-50CSR520
Chassis / Version: LA61
Panel: V500HJ1-LE8
LED backlight: M000930N31A52FAB C-1-1 - 6202B0009L101
T-CON: V500HJ1-XCME
LED driver (backlight): integrated into PSU
PWM LED driver: BD9479FV (C0ZBZ0002164)
Power Supply (PSU): TNPA6070 1 P
PWM Power: FA1A02N (C0DBBYY00089), FA6A00AN (C0DBAYY02411), NR131S (C0DBAYY01915)
MOSFET Power: TK10P60W (B1CFRR000028)
MainBoard: TNPA4G568 3 A
IC MainBoard: MN2WS0275PBS
Tuner: TDSA-G320D
Control: WiFi: DNUA-P75B, IR: TNPA6056
TX-50CSR520 Specifications
PANASONIC TX-50CSR520
General recommendations for TV LCD LED repair
Possible manifestations of malfunctions
- The PANASONIC TX-50CSR520 TV does not turn on at all. Control lamps do not light up or blink. The TV on the remote control and control panel buttons does not respond.
In such cases, the TNPA6070 power supply usually fails. Then we recommend measuring its output voltages and, if they are absent, you should check the serviceability of the power switches (TK10P60W (B1CFRR000028)) and rectifier diodes of the converters for a possible short circuit.
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) FA1A02N (C0DBBYY00089), FA6A00AN (C0DBAYY02411), NR131S (C0DBAYY01915), if they do not have visible damage to the case and an open short circuit between the terminals, are usually checked by replacement.
- There is no picture, but there is sound, it reacts to the remote control. Or the image appears when turned on and disappears immediately
The malfunction in most of these cases is found in the nodes and elements of the LED panel backlight. The reason may be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
It is impossible to check the LED bars for a break without disassembling the panel with a multimeter or tester. For these purposes, it is necessary to open all series-connected PN junctions and a voltage of the order of tens of volts will be required, and ideally a current source. Having disassembled the panel, it is necessary to check each LED separately. Chinese multimeters tend to light one 3-volt LED in the forward direction. In the case of using dual 6-volt LEDs, the PN junction of its protective zener diode can serve as an indicator of serviceability. In faulty LEDs, the zener diode will either be cut off, or pierced in the K / Z.
- 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 TNPA4G568 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). In cases of complex MB (SSB) repairs and with the necessary skills and equipment, it may sometimes be necessary to replace its MN2WS0275PBS chips and other possible faulty components. Malfunctions associated with the use of BGA soldering technologies are usually easily diagnosed by the warm-up method.
Before replacing the TDSA-G320D tuner, if there is no tuning to the channels, you must first check the software and the supply voltage at its outputs. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus.
If the PANASONIC TX-50CSR520 has no picture, but there is sound, often the V500HJ1-LE8 display backlight 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 when the external light hits the screen.
Replacing the LEDs requires disassembling the V500HJ1-LE8 LCD panel, a process that requires experience and qualifications from the technician. 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 the 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 the main board MainBoard TNPA4G568 often 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 TNPA4G568 with an oscilloscope, as well as synchronization 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 loops and panel strips.
Attention! Users and owners of TX-50CSR520 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 complete non-repairability of the device.
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> PANASONIC TX-50CS520E, TX-50CSR520 Chassis LA61 for models TX-50CS520E, TX-50CSR520
MainBoard TNPA4G568 is shown in the figure below:TNPA4G568
External view of the power supply
Main features of the PANASONIC TX-50CSR520 device:
The matrix (LED panel) V500HJ1-LE8 is installed.
Matrix control uses the Timing Controller (T-CON) V500HJ1-XCME.
To power the backlight LEDs, a converter combined with a power supply is used, controlled by a BD9479FV PWM controller (C0ZBZ0002164).
The formation of the necessary supply voltages for all the nodes of the PANASONIC TX-50CSR520 TV is carried out by the TNPA6070 power module, or its analogs using the FA1A02N (C0DBBYY00089), FA6A00AN (C0DBAYY02411), NR131S (C0DBAYY01915).
MainBoard - the main board (motherboard) is a TNPA4G568 module, using MN2WS0275PBS chips and others.
The TDSA-G320D tuner provides reception of television programs and tuning to channels.
PANASONIC TX-50CSR520 TV with LCD V500HJ1-LE8, diagonal size 50 "(127 cm) 16: 9 format. The technology of manufacturing the screen of this TV model is realized with LED backlighting.
The V500HJ1-LE8 panel and TNPA4G568 motherboard firmware provide HD and Full HD viewing at 1920x1080 pixels in 1080p (Full HD) graphics.
The TX-50CSR520 is equipped with SMART software, built-in applications and Internet connectivity. 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. Uses NICAM stereo signal system and Sound Surround function.
External interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, component, SCART, HDMI x2, USB, Ethernet (RJ-45), 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.
Dimensions: with stand 1126x690x230 mm, without stand 1126x652x47 mm.
TV weight: with stand: 17.5 kg, without stand: 15 kg.
Attention! The V500HJ1-LE8 panel of the PANASONIC TX-50CSR520 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!
Liquid spillage on the screen is unsafe. Sometimes one drop is enough if it drips down the glass onto the cables to make the TV unrepairable.
