Technical description and composition of the PANASONIC TX-48ASR650 TV, panel type and modules used. The composition of the modules.PANASONIC
Model: TX-48ASR650
Chassis / Version: LA51
Panel: 98.40S08.1SE
T-CON: 14Y_RA_EF12TA2MB4C2LV0.3
Inverter (backlight): integrated into PSU
PWM Inverter: BD9479FV
Power Supply (PSU): TNPA5944 1 P
PWM Power: FA5696N, FA5760N, NR131S
MainBoard: TNPH1077 1 A
IC MainBoard: MN2WS0280, 24C16, AN34043AA, D2837ER
Tuner: TDSA-G370D
TX-48ASR650 Specifications
PANASONIC TX-48ASR650
General recommendations for TV LCD repair
Possible manifestations of defects
- PANASONIC TX-48ASR650 TV does not turn on. There are no signs of operability. The indicators on the front panel do not light or blink, the TV does not respond to the remote control and control buttons.
Most likely, in this case, the main switching power supply (SMPS) TNPA5944 is faulty. It is then necessary to measure its output voltages and, if they are absent, the power switches and rectifier diodes of the converters should be checked for the probability of a short circuit.
In case of breakdowns in the secondary circuits, the converter, as a rule, can operate in an emergency mode in a short circuit mode, and in case of a short circuit in the power elements of the primary circuit, the mains fuse usually breaks.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements, which can disable it in key mode, or provoke an excess of the maximum current or voltage values. These can be circuits supplying the PWM controller, damper or frequency setting circuits, or OOS (negative feedback) elements in the stabilization circuit. PWM controllers (PWM) FA5696N, FA5760N, NR131S, in the absence of external damage and short circuit between the terminals, are checked by replacing them with a known good one.
- There is no image, there is sound, it reacts to the remote control. Or, immediately after switching on for a second, the image may appear and immediately disappear.
The defect can be caused by problems in the nodes or elements of the display backlight, or in the power supply of the lamps or the inverter.If, when diagnosing a malfunction, it is required to turn off the inverter protection, there is a risk of failure of the power elements of the inverter, and special care is required during work, and after they are completed, it is imperative to restore the protection circuits for further safe operation of the TV by the owner in normal mode.
- 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 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). Complicated MB (SSB) repair is possible only in the conditions of a service center with the necessary equipment. Checking or replacing MN2WS0280, 24C16, AN34043AA, D2837ER elements requires the necessary training and professional skills in repairing modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by the warm-up method.
Before changing the TDSA-G370D tuner, if it is not possible to tune to television channels, make sure that there are supply voltages, which must be measured at the corresponding tuner terminals and check the software for correctness. The pulses of the data exchange of the tuner with the processor can be monitored with an oscilloscope
Attention! Users and owners of TX-48ASR650 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-48ASR650 Chassis LA51 for models TX-48AS640B, TX-48AS640E, TX-48ASR650
The MainBoard TNPH1077 is shown in the figure below:TNPH1077
External view of the power supply
The main features of the PANASONIC TX-48ASR650 device:
Installed matrix (LCD panel) 98.40S08.1SE.
Matrix management uses the Timing Controller (T-CON) 14Y_RA_EF12TA2MB4C2LV0.3.
A converter combined with a power supply is used to power the backlight lamps, it is controlled by the BD9479FV PWM controller.
The formation of the necessary supply voltages for all nodes of the PANASONIC TX-48ASR650 TV is carried out by the TNPA5944 power module, or its analogs using the FA5696N, FA5760N, NR131S microcircuits.
MainBoard - the main board (motherboard) is a TNPH1077 module, using MN2WS0280, 24C16, AN34043AA, D2837ER and others.
The TDSA-G370D tuner provides reception of television programs and tuning to channels.
PANASONIC TX-48ASR650 TV with LCD display 98.40S08.1SE, diagonal size 48 "(122 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 the TNPH1077 motherboard firmware provide HD and Full HD viewing at 1920x1080 pixels in 1080p (Full HD) graphics.
The TX-48ASR650 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.
Speaker power 20 W (2x10 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, component, SCART, RGB, HDMI x3, USB x2, Ethernet (RJ-45), Bluetooth, Wi-Fi. A headphone output is provided for individual listening. A VGA (D-Sub 15) connector is used to connect a computer or laptop, supporting 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 panel of the PANASONIC TX-48ASR650 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.
