Technical description and composition of the PANASONIC TX-32LX500P TV, panel type and modules used. The composition of the modules.PANASONIC
Model: TX-32LX500P
Chassis / Version: LH41
Panel: LQ315T3LZ22K
T-CON: CPWBX3374TPZ E
Inverter (backlight): ECXF5504 RDENC2208TPZZ
Power Supply (PSU): TNPA3487 2 & ETXMM565EBB NPX565EB-1A
PWM Power: C5HABZZ00165, MPD7S001, MPD7S001
MainBoard: TNPA3488 2 (Digital) & TNPH0617 4 (AV)
IC MainBoard: C5HABZZ00165, MPD7S001, MPD7S001
Tuner: ENG37A12GF
Control: IR: TNPA3490 4 AD
TX-32LX500P Specifications
PANASONIC TX-32LX500P
General recommendations for TV LCD repair
Possible manifestations of defects
- PANASONIC TX-32LX500P TV 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.
Most likely, in this case, the main switching power supply (SMPS) TNPA3487 is faulty. Its output voltages should be measured, and if they are absent, check the serviceability of the power switches of the converters and rectifier diodes for the probability of a short circuit.
In case of breakdowns in the secondary circuits of the converter, it can usually work in an emergency mode in a short-circuit mode, and with a short circuit in the power elements of the primary circuit, the mains fuse or current sensor in the source of the key most often breaks off.
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, in the absence of visible damage or outright short circuits between the terminals, are checked by replacing them with new ones, or knowingly 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 disappear immediately.
These manifestations can be provoked by the power module, or by defects in the inverter, as well as by the skew of currents in the lamps due to their uneven wear. After checking all the electrolytic capacitors of the filters that are involved in the power supply of the inverter, you should ring the power switches in its converter for breakdown and the secondary windings of the transformers for an open.
If, when diagnosing a malfunction, it is required to turn off the inverter protection, there is a risk of failure of the power elements of the inverter, and special care is required during work, and after they are completed, it is imperative to restore the protection circuits for further safe operation of the TV by the owner in normal mode.
- 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 TNPA3488 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 some cases, to repair the MB (SSB) board, it may be necessary to replace the chips - C5HABZZ00165, MPD7S001, MPD7S001 with new or known good ones. In cases where BGA technologies are used, defects are usually localized by heating.
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 ENG37A12GF tuner terminals are in accordance with the ratings. 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.
Attention to TV owners! Attempts to repair PANASONIC TX-32LX500P on your own are not recommended by the manufacturer and can lead to serious negative consequences!
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> PANASONIC TX-32LX500P Chassis LH41 for models TX-32LXD500, TX-26LXD500, TX-32LX500F, TX-32LX500P, TX-26LX500F, TX-26LX500P
The MainBoard TNPA3488 is shown in the figure below:TNPA3488
External view of the power supply
Main features of the PANASONIC TX-32LX500P device:
Installed matrix (LCD panel) LQ315T3LZ22K.
Matrix control uses the CPWBX3374TPZ Timing Controller (T-CON).
An ECXF5504 inverter is used to power the backlight lamps.
The formation of the necessary supply voltages for all nodes of the PANASONIC TX-32LX500P TV is carried out by the TNPA3487 power supply module, or its analogs using C5HABZZ00165, MPD7S001, MPD7S001 microcircuits.
MainBoard - the main board (motherboard) is a TNPA3488 module, using C5HABZZ00165, MPD7S001, MPD7S001 and others.
The ENG37A12GF tuner provides reception of television programs and tuning to channels.
PANASONIC TX-32LX500P TV with LCD LQ315T3LZ22K, diagonal size 32 "(81 cm) 16: 9. Contrast, as the ratio of maximum to minimum brightness, is 800: 1.
The LQ315T3LZ22K panel and TNPA3488 board firmware can display HD images 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.
The power of the acoustic audio system 20 W (2x10 W) is 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, HDMI. 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 power consumed by the TV in operating mode from the network is 168 watts.
Dimensions: with stand 857x624x300 mm, without stand 857x563x141 mm.
TV weight: with stand: 22.5 kg, without stand: 21.5 kg.
Attention! The LQ315T3LZ22K panel of the PANASONIC TX-32LX500P LCD TV is a rather expensive component.
Avoid impacts on glass and pressure on the surface of the screen to avoid irreversible damage to the LCD panel!