Technical description and composition of the PANASONIC TX-LR32E3 TV, panel type and modules used. The composition of the modules.PANASONIC LED
Model: TX-LR32E3 TX-L32E3
Chassis / Version: GLP26
Panel: VVX32F123G00
LED backlight: NLAW10100R NLAW10100L 010311-L5
T-CON: TNPA5391
LED driver (backlight): TNPA5377 1LD
PWM LED driver: BD8779EFV
MOSFET LED driver: SP8K70FU7TB
Power Supply (PSU): TNPA5364 TNPA5364DD 3P
PWM Power: FA5590N, MP2C6120
MOSFET Power: TK12A60D
MainBoard: TNP8EA114 9A
IC MainBoard: MN2WS0177, 24C16WP, 24C32WP, H27U1G8F2BTR 128F
Tuner: ENGS7302D5F
Control: IR: TNPA5378 2 KA
TX-L32E3 Specifications
PANASONIC TX-LR32E3
General recommendations for TV LCD LED repair
Possible malfunctions
- The PANASONIC TX-LR32E3 TV does not turn on. There are no signs of operability. The indicators on the front panel do not light up or blink, the TV does not respond to the remote control and control buttons.
With such manifestations, a malfunction is most likely found in the TNPA5364 power supply module. It is then necessary to measure its output voltages and, if they are absent, the power switches (TK12A60D) and rectifier diodes of the converters should be checked for the probability of a short circuit.
In case of breakdowns of semiconductors in the secondary circuits, the converter can usually operate in an emergency in the short-circuit mode, and in the event of a short circuit in the power elements of the primary circuit, the mains fuse often breaks.
Mos-Fet power switches used in switching power supplies sometimes fail due to a malfunction of any other elements that can disable it in the key mode, or create an excess of the maximum permissible key parameters. These can be elements supplying a PWM regulator, frequency setting or damper circuits, or elements of negative feedback in the stabilization circuit. PWM controllers FA5590N, MP2C6120, in the absence of visible damage or outright short circuits between the terminals, are checked by replacing them with new ones, or known to be working properly.
- There is no image, there is sound, it reacts to the remote control. Or the image may appear for a second when turned on and immediately disappear.
Usually, in such cases, a malfunction is detected in the LED panel backlight nodes. 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 TV does not turn on, the indicator signals the standby or operating mode, or blinks.
Repair or diagnostics of the TNP8EA114 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). In cases of complex MB (SSB) repairs and with the necessary skills and equipment, it may sometimes be necessary to replace its chips MN2WS0177, 24C16WP, 24C32WP, H27U1G8F2BTR 128F 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 ENGS7302D5F tuner, if there is no tuning to the channels, you must first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
If the PANASONIC TX-L32E3 has no picture, but there is sound, often the VVX32F123G00 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 with a successful hit of external light on the screen.
Replacing the LEDs requires disassembling the VVX32F123G00 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 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 TNP8EA114 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, 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 TNP8EA114, as well as synchronizing signals to the loops with drivers, with an oscilloscope.
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-LR32E3 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 can lead to complete non-repairability of the device.
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> PANASONIC TX-LR32E3E Chassis GLP26
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL -----------> GLP26 Chassis for models TX-L32E3E,TX-L37E3E
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> LA18 Chassis for models TX-L32E30E, TX-LF32E30, TX-LR32E30, TX-L37E30E, TX-LF37E30
The MainBoard TNP8EA114 is shown in the figure below:TNP8EA114
External view of the power supply
The main features of the PANASONIC TX-LR32E3 device:
Installed matrix (LED-panel) VVX32F123G00.
Matrix control uses the TNPA5391 Timing Controller (T-CON).
To power the backlight LEDs, the TNPA5377 LED driver is used, controlled by the BD8779EFV PWM controller. The keys of the SP8K70FU7TB type are used as power elements of the LED driver.
The formation of the necessary supply voltages for all nodes of the PANASONIC TX-LR32E3 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 TNP8EA114 module, using microcircuits MN2WS0177, 24C16WP, 24C32WP, H27U1G8F2BTR 128F and others.
The ENGS7302D5F tuner provides reception of television programs and tuning to channels.
PANASONIC TX-L32E3 TV with VVX32F123G00 LCD, 32 "(81 cm) 16: 9 format diagonal. The LED-panel of this TV is equipped with edge LED backlighting - Edge LED.
The VVX32F123G00 panel and TNP8EA114 motherboard firmware provide HD and Full HD viewing at 1920x1080 pixels in 1080p (Full HD) graphics. 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, VGA, HDMI x3. 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: 1024x768, 1280x1024, 1360x768, 1920x1080.
The digital tuner is capable of receiving terrestrial and cable channels in the DVB-T MPEG4, DVB-C standards.
Dimensions: with stand 769x514x230 mm, without stand 769x480x41 mm.
Attention! The VVX32F123G00 panel of the PANASONIC TX-L32E3 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.
