Technical description and composition of the PANASONIC TX-LR32E5 TV, panel type and modules used. The composition of the modules.PANASONIC LED
Model: TX-LR32E5 TX-L32E5
Chassis / Version: LA35
Panel: VVX32F125G00
LED backlight: NLAW10171R 32Y36R & NLAW10171L 32Y36L
LED driver (backlight): integrated into PSU
PWM LED driver: BD9287FP
Power Supply (PSU): TNPA5596 4 [A] A09581IX
PWM Power: NCP1234AD65 (C0DBBYY00047) - 34A65
MOSFET Power: TK8A65D (B1CERR000067)
MainBoard: TNPH0992 2 A (A11370EG)
IC MainBoard: MN2WS0250E, AN34043, 29F4G08ABADA, K4B2G1646C
Tuner: ENVS9302D5F
Control: IR: TNPA5719
TX-L32E5 Specifications
PANASONIC TX-LR32E5
General recommendations for TV LCD LED repair
Possible manifestations of malfunctions
- The PANASONIC TX-LR32E5 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.
Often in such cases, the TNPA5596 power supply module is faulty. Its output voltages should be measured and, in their absence, the power switches (TK8A65D (B1CERR000067)) and rectifier diodes should be checked for the probability of a short circuit in the converters.
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.
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 regulator, in frequency setting or damper circuits, as well as in negative feedback stabilization. PWM microcircuits (PWM) NCP1234AD65 (C0DBBYY00047) - 34A65 are usually 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, the channels are switched. In some cases, the image appears when turned on and disappears immediately.
Often in such cases, there is no backlighting of the LED panel. The reason for this may be an open circuit in the LED circuit, or a problem in stabilizing their power supply.
It is impossible to check the LED bars for a break without disassembling the panel with a multimeter or tester. For these purposes, it is necessary to open all series-connected PN junctions and a voltage of the order of tens of volts is required, and ideally a current source. Having disassembled the panel, it is necessary to check each LED separately. Chinese multimeters tend to lightly light one 3-volt LED in the forward direction. In the case of using dual 6-volt LEDs, the PN junction of its protective zener diode can serve as an indicator of serviceability. In faulty LEDs, the zener diode will either be cut off, or pierced 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 TNPH0992 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 attempts to repair the MB (SSB) board, it is necessary to check the serviceability of its elements - MN2WS0250E, AN34043 which may require replacement with new ones. If a BGA processor is installed, there is a possibility that the soldering of the contacts of its pins with the board is broken (detected by warming up).
If the PANASONIC TX-L32E5 has no picture, but there is sound, often the VVX32F125G00 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 VVX32F125G00 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 TNPH0992 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 normal limits, it is necessary to trace the passage of LVDS signals from the MainBoard TNPH0992 with an oscilloscope, 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 loops and panel strips.
The malfunction of the ENVS9302D5F tuner is established after checking the software and all supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be monitored with an oscilloscope.
We remind users again! Attempts to repair the PANASONIC TX-LR32E5 TV on your own without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> PANASONIC TX-LR32E5 Chassis LA35
The appearance of MainBoard TNPH0992 is shown in the figure below:TNPH0992
External view of the power supply
The main features of the PANASONIC TX-LR32E5 device:
Installed matrix (LED panel) VVX32F125G00.
To power the backlight LEDs, a converter combined with a power supply is used, controlled by a BD9287FP PWM controller.
The formation of the necessary supply voltages for all nodes of the PANASONIC TX-LR32E5 TV is carried out by the TNPA5596 power module, or its analogs using NCP1234AD65 (C0DBBYY00047) - 34A65 microcircuits and TK8A65D (B1CERR000067) power switches.
MainBoard - the main board (motherboard) is a TNPH0992 module, using MN2WS0250E, AN34043, 29F4G08ABADA, K4B2G1646C and others.
Tuner ENVS9302D5F provides reception of television programs and tuning to channels.
TV PANASONIC TX-L32E5 with LCD VVX32F125G00, diagonal size 32 "(81 cm) 16: 9 format. The technology of manufacturing the screen of this TV model is realized with LED backlighting.
The VVX32F125G00 panel and the TNPH0992 motherboard firmware provide HD and Full HD viewing at 1920x1080 pixels in 1080p (Full HD) graphics.
The TX-L32E5 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, DivX, MKV, 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 x4, USB x2, Ethernet (RJ-45). 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.
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 mains is 69 W.
Dimensions: with stand 764x519x230 mm, without stand 764x473x52 mm.
TV weight: with stand: 11 kg, without stand: 9 kg.
Attention! The VVX32F125G00 panel of the PANASONIC TX-L32E5 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.
