Technical description and composition of the PANASONIC TX-32AR400 TV, panel type and modules used. The composition of the modules.PANASONIC LED
Model: TX-32AR400
Panel: TPT315B5-DXJSFE
LED backlight: GJ-315-D508-V5
T-CON: 32-37 R0W2.1 HD VER 0.1 6870C-0442B
LED driver (backlight): integrated into PSU
PWM LED driver: PF7903BS
Power Supply (PSU): 715G6197-P01-001-003E PLTVDL291XAP2
PWM Power: PF6200S, FAN7530 (PFC), ICE3BR1765J, FSFR1800U
MOSFET Power: STD432S, 2SK3569
MainBoard: 715G6173-M0F-000-004K
IC MainBoard: 25L12835F, TAS5721
Tuner: RE231TN
Control: IR: 715G6517-K01-000-004I
TX-32AR400 Specifications
PANASONIC TX-32AR400
General recommendations for TV LCD LED repair
Possible malfunctions
- PANASONIC TX-32AR400 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.
In such cases, you should start looking for a fault in the circuits of the 715G6197-P01-001-003E power supply. Its output voltages should be measured, and in their absence, check the serviceability of the power switches (STD432S, 2SK3569) of the converters and rectifier diodes for the probability of short circuit.
In case of any breakdowns in the secondary circuits, the converter can operate in an emergency mode of a short circuit, and with a short circuit in the power elements of the primary circuit, the mains fuse or the current sensor at the source of the key often breaks off.
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) PF6200S, FAN7530 (PFC), ICE3BR1765J, FSFR1800U are usually checked by replacing them with new ones, or knowingly working.
- 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 disappear immediately.
The malfunction in most of these cases is found in the nodes and elements of the LED panel backlight. 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 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 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 indicator blinks or is on constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the 715G6173-M0F-000-004K 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). In cases of complex MB (SSB) repairs and with the necessary skills and equipment, it may sometimes be necessary to replace its 25L12835F, TAS5721 chips and other possible faulty components. Malfunctions associated with the use of BGA soldering technologies are usually easily diagnosed by the warm-up method.
Failure of the RE231TN tuner is established after checking the software and all supply voltages at its outputs. The data exchange of the tuner with the processor via the I2C bus can be monitored with an oscilloscope.
If the PANASONIC TX-32AR400 does not have an image, but there is sound, often the TPT315B5-DXJSFE 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 TPT315B5-DXJSFE 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 715G6173-M0F-000-004K 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 trace the passage of LVDS signals from MainBoard 715G6173-M0F-000-004K with an oscilloscope, as well as synchronization signals to 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.
Remember! Attempts to self-repair the PANASONIC TX-32AR400 TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!
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The appearance of the MainBoard 715G6173-M0F-000-004K is shown in the figure below:715G6173-M0F-000-004K
External view of the power supply
The main features of the PANASONIC TX-32AR400 device:
Installed matrix (LED panel) TPT315B5-DXJSFE.
Matrix control uses Timing Controller (T-CON) 32-37.
A converter combined with a power supply is used to power the backlight LEDs and is controlled by a PF7903BS PWM controller.
The formation of the necessary supply voltages for all nodes of the PANASONIC TX-32AR400 TV is carried out by the 715G6197-P01-001-003E power module, or its analogs using PF6200S, FAN7530 (PFC), ICE3BR1765J, FSFR1800U and power switches of the STD432S, 2SK3569 type.
MainBoard - the main board (motherboard) is a 715G6173-M0F-000-004K module, using 25L12835F, TAS5721 and others.
Tuner RE231TN provides reception of television programs and tuning to channels.
TV PANASONIC TX-32AR400 with LCD TPT315B5-DXJSFE, diagonal size 32 "(81 cm) 16: 9 format. The LCD panel of the TV is equipped with direct backlighting with rear LEDs - Direct LED.
TPT315B5-DXJSFE panel and 715G6173-M0F-000-004K firmware enable HD viewing at 1366x768 resolution for 720p (HD Ready) graphics decomposition. 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. Multimedia file formats supported by the video processor: MP3, WMA, MPEG4, MKV, JPEG.
The power of the acoustic audio system is 10 W (2x5 W) 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 x2, 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 727x464x194 mm, without stand 727x432x67 mm.
TV weight: with stand: 5.5 kg, without stand: 5 kg.
Attention! Panel TPT315B5-DXJSFE LED TV PANASONIC TX-32AR400 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.
