Technical description and composition of the PANASONIC TX-LR32X3 TV, panel type and modules used. The composition of the modules.PANASONIC LED
Model: TX-LR32X3 TX-L32X3
Chassis / Version: GLP26
Panel: VVX32H119G00
LED backlight: STM320A27R / L rev4.0_36_100927
LED driver (backlight): TNPA5377
Power Supply (PSU): TNPA5364 DD 2P
PWM Power: FA5590N, MP2C6120
MOSFET Power: TK12A60D
MainBoard: TNP8EA119 8 A
IC MainBoard: AN34043AA, LV4924, H27U1G8F2BTR
Tuner: ENGS7302D5F
Control: Remote: N2QAYB000666
TX-L32X3 Specifications
PANASONIC TX-LR32X3
General recommendations for TV LCD LED repair
Possible malfunctions
- The PANASONIC TX-LR32X3 TV does not turn on at all. No response to the remote control and front panel control buttons. Indicator lamps do not light up or flash.
In some of these cases, the main switching power supply, the TNPA5364 module, is faulty. Its output voltages should be measured and, in their absence, the serviceability of the power switches (TK12A60D) and rectifier diodes in the converters should be checked for possible breakdown.
In case of breakdowns of semiconductors in the secondary circuits of any converter, as a rule, it can operate in an emergency mode of short circuit without output voltages, and with a short circuit in the elements of the primary circuit, the mains fuse most often breaks off immediately and less often the current sensor in the source of the key.
Breakdown of Mos-Fet switches used in switching power supplies is often caused by malfunctions of other elements, for example, in the power supply circuit of the PWM controller, in frequency setting or damper circuits, as well as in negative feedback stabilization. PWM microcircuits (PWM) FA5590N, MP2C6120 are usually checked by replacing them with new ones, or knowingly working properly.
- There is no picture, but there is sound, it reacts to the remote control. Or the image appears when turned on and immediately disappears
Often in such cases, there is no backlighting of the LED panel. 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 should be remembered that it is not possible to determine an open circuit in the LED lines without disassembling the panels using a tester or multimeter without an additional device, for example, a current source. To open all PN junctions connected in series at once, a voltage of several tens of volts may be required. Then you need to open the panel and check each LED separately with a multimeter. If the capabilities of your multimeter do not allow opening the LED in the forward direction or dual LEds are used, then the PN transition of the emergency zener diode can indirectly serve as an indicator of serviceability. In the event of a malfunction of the LED-a, the PN-junction of the Zener diode will either be cut off, or broken through in the SC.
- The indicator on the front panel blinks, the TV does not turn on in operating mode, does not respond to the remote control.
Repair or diagnostics of the TNP8EA119 motherboard should begin with checking the stabilizers and power converters required to power the microcircuits and 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 - AN34043AA, LV4924, H27U1G8F2BTR 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.
Before changing the ENGS7302D5F tuner, if it is not possible to tune to TV channels, you should make sure that there are supply voltages, which must be measured at the corresponding tuner pins and check the software for correctness. The pulses of the data exchange of the tuner with the processor can be monitored with an oscilloscope
If the PANASONIC TX-L32X3 has no picture, but there is sound, the VVX32H119G00 display backlight often 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 VVX32H119G00 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 TNP8EA119 turns out to be faulty, a software failure is also possible.
Then, first of all, you need 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 use an oscilloscope to trace the passage of LVDS signals from the MainBoard TNP8EA119, 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.
Owners of the TX-LR32X3 TV are recommended to contact only qualified specialists with the necessary experience for repair! Attempts to repair yourself without the appropriate knowledge and skills can lead to irreversible negative consequences!
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> PANASONIC TX-L32X3E, TX-LR32X3 Chassis GLP26 for TX-L32X3E, TX-LR32X3
The MainBoard TNP8EA119 is shown in the figure below:TNP8EA119
External view of the power supply
The main features of the PANASONIC TX-LR32X3 device:
Installed matrix (LED panel) VVX32H119G00.
The TNPA5377 LED driver is used to power the backlight LEDs.
The formation of the necessary supply voltages for all nodes of the PANASONIC TX-LR32X3 TV is carried out by the TNPA5364 power module, or its analogs using FA5590N, MP2C6120 microcircuits and power switches of the TK12A60D type.
MainBoard - the main board (motherboard) is a TNP8EA119 module, using AN34043AA, LV4924, H27U1G8F2BTR microcircuits and others.
The ENGS7302D5F tuner provides reception of television programs and tuning to channels.
PANASONIC TX-L32X3 TV with LCD VVX32H119G00, 32 "(81 cm) 16: 9 diagonal. Dynamic contrast ratio of 2,000,000: 1 is achieved by special control of LED operation. The technology of production of the screen of this TV model is realized with LED backlighting.
The VVX32H119G00 panel and TNP8EA119 firmware enable HD viewing at 1366x768 pixels for 720p graphics resolution (HD Ready). 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, 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, RGB, HDMI x2. A headphone output is provided for individual listening. To connect a computer or laptop, a VGA (D-Sub 15) connector is used, which supports resolutions: 640x480, 1920x1080.
The digital tuner is able to receive terrestrial and cable channels in the DVB-T MPEG4, DVB-C standards.
The power consumed by the TV in operating mode from the network is 51 watts.
Dimensions: with stand 769x514x230 mm, without stand 769x480x75 mm.
TV weight: with stand: 12 kg, without stand: 9.3 kg.
Attention! The VVX32H119G00 panel of the PANASONIC TX-L32X3 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.
