Technical description and composition of the PANASONIC TX-49DSR500 TV, panel type and modules used. The composition of the modules.PANASONIC LED
Model: TX-49DSR500
Chassis / Version: KM29E
Panel: TZLP151KHAB
LED backlight: CEM-3-N 49Inch_Panasonic_REV0.4
T-CON: 6870C-0532B
LED driver (backlight): TNPA5935 1
PWM LED driver: BD9486F-GE2 (C0ZBZ0002179)
MOSFET LED driver: B1CERM000055
Power Supply (PSU): TNPA5916 1
PWM Power: C0DBBYY00058, C0DBAYY01329
MOSFET Power: B1CFRR000028, B1CERR000096
MainBoard: TNP4G592 1 A
IC MainBoard: MN2WS0275, AN34043AAV
Tuner: TDSA-G320D
Control: IR: TNPA6010 1, WiFi: DNUA-P75B N5HBZ0000120
TX-49DSR500 Specifications
PANASONIC TX-49DSR500
General recommendations for TV LCD LED repair
Possible manifestations of malfunctions
- The PANASONIC TX-49DSR500 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.
Usually, with such manifestations, the defect is caused by faulty elements in the main TNPA5916 power supply module. It is necessary to measure its secondary output voltages, and if they are absent, check the power switches (B1CFRR000028, B1CERR000096) and rectifier diodes in the converters for a short circuit.
In case of breakdowns in the secondary circuits, the converter, as a rule, can operate in an emergency in the short-circuit mode, and in case of a short circuit in the power elements of the primary circuit, the mains fuse is usually 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) C0DBBYY00058, C0DBAYY01329, 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 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 for this may be an open circuit in the LED circuit, or a problem in stabilizing their power supply.
When trying to detect a break in the LED lines, it should be borne in mind that it is difficult to do this without disassembling the panel. For example, a current source is needed to open PN junctions connected in series.
- 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 TNP4G592 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 must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - MN2WS0275, AN34043AAV and replace the failed chips with new ones. Some malfunctions may be associated with the use of BGA soldering technologies in modern Main Board. Typically, such defects are detected by local heating of the chip.
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-49DSR500 has no picture, but there is sound, often the backlight of the TZLP151KHAB display 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 TZLP151KHAB 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 the main board MainBoard TNP4G592 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 TNP4G592 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 cables and panel strips.
Once again, we remind TV users: you should not try to repair yourself without the appropriate knowledge, experience and the necessary qualifications! Trust the repair to professionals with sufficient experience in the field of electronic repair.
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> PANASONIC TX-49DSR500 Chassis KM29E
MainBoard TNP4G592 is shown in the figure below:TNP4G592
External view of the power supply
The main features of the PANASONIC TX-49DSR500 device:
Installed matrix (LED panel) TZLP151KHAB.
Matrix control uses a Timing Controller (T-CON) 6870C-0532B.
To power the backlight LEDs, the TNPA5935 LED driver is used, controlled by the BD9486F-GE2 PWM controller (C0ZBZ0002179). The keys of the B1CERM000055 type are used as power elements of the LED driver.
The formation of the necessary supply voltages for all nodes of the PANASONIC TX-49DSR500 TV is carried out by the TNPA5916 power module, or its analogs using C0DBBYY00058, C0DBAYY01329 microcircuits and B1CFRR000028, B1CERR000096 power switches.
MainBoard - the main board (motherboard) is a TNP4G592 module, using MN2WS0275, AN34043AAV and others.
The TDSA-G320D tuner provides reception of television programs and tuning to channels.
TV PANASONIC TX-49DSR500 with LCD TZLP151KHAB, diagonal size 49 "(124 cm) 16: 9 format. The technology of manufacturing the screen of this TV model is realized with LED backlighting.
The TZLP151KHAB panel and the TNP4G592 motherboard firmware provide HD and Full HD viewing at 1920x1080 pixels in 1080p (Full HD) graphics.
The TX-49DSR500 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, HDMI x2, USB, Ethernet (RJ-45), Wi-Fi 802.11n. 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 1106x693x235 mm, without stand 1106x644x80 mm.
TV weight: with stand: 15.5 kg, without stand: 13.5 kg.
Attention! The panel TZLP151KHAB of the PANASONIC TX-49DSR500 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.