Technical description and composition of the PANASONIC TX-49FXR600 TV, panel type and modules used. The composition of the modules.PANASONIC LED
Model: TX-49FXR600
Chassis / Version: KM42
Panel: LC490EQY (SL) (A2)
LED backlight: INNOTEK 49INCH_PANASONIC 3PCM00747A_REV0.5
T-CON: 6870C-0757A 6871L-5472A
LED driver (backlight): integrated into PSU
PWM LED driver: BD9486F
MOSFET LED driver: N-FET TO-220
Power Supply (PSU): TNPA6397 3P
PWM Power: FA5696N, FA6B02N, BD9E102FJ
MOSFET Power: TK10A60W, TK7A60W
MainBoard: TNPH1196 1A
IC MainBoard: CPU, eMMC, DRAM, AUDIO, DC / DC
Tuner: 24H112A
TX-49FXR600 Specifications
PANASONIC TX-49FXR600
General recommendations for TV LCD LED repair
Possible malfunctions
- The PANASONIC TX-49FXR600 TV does not turn on, does not respond to the remote control and control panel buttons, does not light or blink indicators.
In some of these cases, the main switching power supply, the TNPA6397 module, is faulty. Its output voltages should be measured and, in their absence, the serviceability of the power switches (TK10A60W, TK7A60W) and rectifier diodes in the converters should be checked for possible breakdown.
In case of breakdowns in the secondary circuits, the converter can operate in short-circuit mode, and in case of short-circuit in the elements of the primary circuit, the mains fuse 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) FA5696N, FA6B02N, BD9E102FJ, if they do not have visible damage to the case and a frank short circuit between the terminals, are usually checked by replacing.
- There is no image, the screen is black, there is sound, when the screen is illuminated outside, you can sometimes see barely noticeable outlines of the image.
The most likely problem in these cases is a malfunction of the LED backlight. The reason may be in the breakage of the LEDs, in the stabilization of their power supply, or in the violation of the contact connections of the strings connectors,
It is impossible to identify an open circuit in the LED line without disassembling the panel with a simple multimeter. The LEDs are connected in series and a voltage of several tens of volts is required to open their junctions. Ideally, a current source is suitable for such purposes. You can open the panel and check each LED separately. Usually, Chinese multimeters lightly light up one 3-volt LED if you connect the probes to it in the forward direction (red probe to the anode, black to the cathode). For dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of the LED health. In the event of a malfunction of the LED, its zener diode will either be cut off, or broken through in the K / Z.
- The TV does not turn on, the indicator signals the standby or operating mode, or blinks.
Repair or diagnostics of the TNPH1196 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). Repair of the board and replacement of CPU, eMMC, DRAM, AUDIO, DC / DC microcircuits are made if the necessary equipment and the corresponding element base are available. Malfunctions associated with the use of BGA soldering technologies can be localized by the warm-up method.
Before replacing the 24H112A tuner, if there is no tuning to the channels, you must first check the software and supply voltage at its outputs. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus.
Attention to users! Self-repair of the PANASONIC TX-49FXR600 TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> PANASONIC TX-49FXR600 Chassis KM42
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> TNPA6397 Power supply
You can download the file and update instructions on the manufacturer's website for the TX-49FXR600 model.
Update results:
Date / Version Additions / Changes
Jul, 30, 2019 Version 3.091 Improved system stability.
Oct, 30, 2018 Version 3.074 Support control from the Google Assistant / Amazon Alexa devices. Improved system stability.
Aug. 30, 2018 Version 3.061 Improved system stability.
Jun. 27, 2018 Version 3.052 Improved system stability.
Once again, we remind users and TV owners.Self-repair attempts can have serious negative consequences, up to complete non-repairability.
MainBoard TNPH1196 is shown in the figure below:TNPH1196
External view of the power supply
The main features of the PANASONIC TX-49FXR600 device:
Installed matrix (LED panel) LC490EQY (SL) (A2).
Matrix control uses a Timing Controller (T-CON) 6870C-0757A.
To power the backlight LEDs, a converter combined with a power supply is used, controlled by a BD9486F PWM controller. N-FET TO-220 switches are used as power elements of the LED driver.
The formation of the necessary supply voltages for all nodes of the PANASONIC TX-49FXR600 TV is carried out by the TNPA6397 power module, or its analogs using the FA5696N, FA6B02N, BD9E102FJ microcircuits and power switches of the TK10A60W, TK7A60W type.
MainBoard - the main board (motherboard) is a TNPH1196 module using CPU, eMMC, DRAM, AUDIO, DC / DC and others.
The 24H112A tuner provides reception of television programs and tuning to channels.
TV PANASONIC TX-49FXR600 with LCD LC490EQY, diagonal size 48.5 "(123 cm) 16: 9 format. The required screen brightness of 350 cd / m² is provided by LED backlighting. The LCD panel of the TV is equipped with direct backlighting with rear LEDs - Direct LED.
LC490EQY display The TNPH1196 software is capable of displaying images in high quality UHD 4K at 3840x2160 pixels in 4K UHD, HDR graphics. Graphic image processing is carried out using modern High Dynamic Range (HDR) technologies with an extended range of brightness gradations.
The TX-49FXR600 is equipped with SMART software, built-in applications and Internet connectivity. Internet connection can be made via Wi-Fi wireless connection. Multimedia file formats supported by the video processor: MP3, WMA, MPEG4, HEVC (H.265), 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, HDMI x3, USB x2, Ethernet (RJ-45), Wi-Fi 802.11ac, Miracast. A headphone output is provided for individual listening.
The digital tuner is capable of receiving terrestrial and cable channels in the DVB-T MPEG4, DVB-C, DVB-T2, DVB-S2 standards.
The power consumed by the TV in operating mode from the network is 154 watts.
Dimensions: with stand 1106x701x242 mm, without stand 1106x644x81 mm.
TV weight: with stand: 15 kg, without stand: 14 kg.
Attention! The LC490EQY (SL) (A2) panel of the PANASONIC TX-49FXR600 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.