Technical description and composition of the PANASONIC TX-32ER250ZZ TV, panel type and modules used. The composition of the modules.PANASONIC LED
Model: TX-32ER250ZZ
Chassis / Version: MSD3463-T5C1
Panel: K320WDC2B
LED backlight: K320WDC1 A2 4708-K32WDC-A2113N01
T-CON: 6870C-0442B
LED driver (backlight): integrated into MainBoard
Power Supply (PSU): integrated into MainBoard
MainBoard: MSD3463-T5C1 4727-3463T5-A1233K01
IC MainBoard: SPI FLASH: 25Q64CSIG
Tuner: ST43WS-2A-E
Control: Button: 4713-3200C1-A2223K01
TX-32ER250ZZ Specifications
PANASONIC TX-32ER250ZZ
General recommendations for TV LCD LED repair
Possible manifestations of malfunctions
- TV PANASONIC TX-32ER250ZZ does not turn on at all. Control lamps do not light up or blink. The TV on the remote control and control panel buttons does not respond.
First of all, in such cases, you should make sure that the common switching power supply (SMPS) - the AC / DC voltage converter of the mains voltage - is working. All source elements in this TV model are located on the MainBoard MSD3463-T5C1. It is necessary to measure the output voltages in its secondary circuits, and if they are completely absent, the serviceability of the power switches and rectifier diodes should be checked for a possible breakdown (short circuit).
In case of breakdowns of semiconductors in the secondary circuits, the converter can usually 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 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 controller, in frequency setting or damper circuits, as well as in negative feedback stabilization. PWM microcircuits (PWM) are usually checked by replacing them with new ones, or knowingly working.
- There is no picture, 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 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 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 MSD3463-T5C1 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). Complicated MB (SSB) repair is possible only in the conditions of a service center with the necessary equipment. Checking or replacing SPI FLASH: 25Q64CSIG requires the necessary training and professional skills to repair modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by the warm-up method.
If there is no tuning for terrestrial or cable TV channels, you should make sure that the software is correct, as well as that the supply voltages on the terminals of the ST43WS-2A-E tuner match. It is also necessary to check with an oscilloscope the presence of pulses of data exchange between the tuner and the processor via the I2C bus.
If the PANASONIC TX-32ER250ZZ has no picture, but there is sound, the backlight of the K320WDC2B display 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 K320WDC2B LCD panel, a process that requires experience and qualifications from the technician. 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 the main board MainBoard MSD3463-T5C1 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, 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 MSD3463-T5C1, as well as synchronization 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.
We remind users again! Attempts to repair the PANASONIC TX-32ER250ZZ TV on your own without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
The appearance of the MainBoard MSD3463-T5C1 is shown in the figure below:MSD3463-T5C1
The main features of the PANASONIC TX-32ER250ZZ device:
Installed matrix (LED panel) K320WDC2B.
Matrix control uses the Timing Controller (T-CON) 6870C-0442B.
A converter combined with the MSD3463-T5C1 main board is used to power the backlight LEDs.
The power module is combined with the MainBoard and is made according to the AC / DC flyback converter circuit.
MainBoard - the main board (motherboard) is an MSD3463-T5C1 module, using SPI FLASH chips: 25Q64CSIG and others.
The ST43WS-2A-E tuner provides reception of television programs and tuning to channels.
TV PANASONIC TX-32ER250ZZ with LCD K320WDC2B, diagonal size 32 "(81 cm) 16: 9 format. The technology of manufacturing the screen of this TV model is realized with LED backlighting.
The K320WDC2B panel and MSD3463-T5C1 board firmware can display HD images at 1366x768 pixels for 720p (HD Ready) graphics resolution. Multimedia file formats supported by the video processor: MP3, WMA, MPEG4, MKV, JPEG.
The power of the acoustic audio system is 12 W (2x6 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, VGA, HDMI x2, MHL, USB. 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 standards.
Dimensions: with stand 732x485x184 mm, without stand 732x432x76 mm.
TV weight: 4 kg.
Attention! The K320WDC2B panel of the PANASONIC TX-32ER250ZZ LED TV is the 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.
