Technical description and composition of the PANASONIC TX-R32LX86K TV, panel type and modules used. The composition of the modules.PANASONIC
Model: TX-R32LX86K TX-32LX86
Chassis / Version: LH76
Panel: AX080A015A
Lamp backlight: 8 Lamp CCFL
T-CON: TCON103-F
Inverter (backlight): MPV8A081 PCPV0068
Power Supply (PSU): TNPA4638 1 P & MPV8A081 PCPV0068
PWM Power: MP2B6120 (C0DABYY00008), FA5501AN (C0DBBZG00004), C0DBBYG00001
MOSFET Power: B1CERQ000041
MainBoard: TNPH0729 2 A
IC MainBoard: EEPROM: 24C16, Tuner: WJCE6353
Tuner: ENG39E04GF
Control: IR: TNPA4480 1 V
TX-32LX86 Specifications
PANASONIC TX-R32LX86K
General recommendations for TV LCD repair
Possible manifestations of defects
- The PANASONIC TX-R32LX86K 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.
Usually, with such manifestations, the defect is caused by faulty elements in the main TNPA4638 power supply module. It is necessary to make sure that its output voltages are present and, if they are completely absent, check the power switches and rectifier diodes for a possible short circuit.
In the event of diode breakdowns in the secondary circuits, the converter can operate in an emergency mode of short circuit without output voltages, and in the event of a short circuit in the power elements of the primary circuit, the mains fuse and / or the current sensor in the source of the key usually 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 picture, but there is sound and reaction to the remote control. Or, for a second, the image may appear immediately after switching on.
A defect can be caused by problems in the nodes or elements of the display backlight, or in the power supply of lamps or inverter.If all electrolytic capacitors of the filter for the power supply of the inverter are in good order, you should make sure that the lamps are in good working order, then you need to check the converter keys and secondary windings of the transformers.
Sometimes it is necessary to disable the inverter protection for diagnostic purposes. In such cases, special care must be taken during work, and the protective circuits must be restored immediately after the repair is completed.
- The indicator on the front panel blinks, the TV does not turn on in operating mode, does not respond to the remote control.
Repair or diagnostics of the TNPH0729 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).
If there is no reception of TV channels, but the TV is working properly from external devices, first of all, you need to check the supply voltage of the ENG39E04GF tuner and update the software. I2C communication pulses must be monitored with an oscilloscope.
PANASONIC TX-32LX86 has no image when there is a signal, and it is often caused by a malfunction of the display backlight. Moreover, the problem can be both inside the LCD panel (matrix) AX080A015A, for example, a malfunction of the CCFL (EEFL) lamps, and outside in their power source - the inverter.
Without backlighting, sometimes you can see a barely noticeable image with a certain successful hit of external light on the screen.
Often, repairing the backlight requires disassembling the LCD panel AX080A015A - a painstaking process that requires increased attention and accuracy from the master. In such cases, there is a possibility, with the slightest negligence, to damage the glass or loops and the TV may become unrepairable.
We strongly do not recommend doing such work to owners of TVs and craftsmen who do not have experience in repairing LCD panels! Moreover, at home (at the owner's home).
If there is no image in the presence of backlight, the screen becomes slightly lighter when turned on, and if the TV is open, the light from the lamps can be seen through the holes in the panel case.
In this case, there may be a malfunction inside the panel, damage to strips, loops, the T-CON board (Timing Controller) may be defective. But often the main board MainBoard TNPH0729 also turns out to be faulty, a software failure is also possible.
In such cases, the master first of all needs to check the main supply voltage of the panel at the LVDS connector, the fuses on the T-CON board or the panel brackets, as well as the supply and reference voltages for line and column drivers - VGH, VGL, Vcom.
If all of the above measurements are within the normal range, then the oscilloscope must track the passage of LVDS signals from the MainBoard TNPH0729, as well as synchronization signals from T-CON to loops with drivers.
Remember! Attempts to self-repair the PANASONIC TX-R32LX86K 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!
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> PANASONIC TX-R32LX86K Chassis LH76 The composition uses MainBoard TNPH0729 and LCD-panel AX080A015A.
Power supply unit (PSU) TNPA4638 1 MPV8A081 PCPV0068 Power Supply.
MainBoard TNPH0729 is shown in the figure below:TNPH0729
External view of the power supply
Main features of the PANASONIC TX-R32LX86K device:
Installed matrix (LCD panel) AX080A015A.
Matrix control uses the TCON103-F Timing Controller (T-CON).
The inverter MPV8A081 is used to power the backlight lamps.
The formation of the necessary supply voltages for all the nodes of the PANASONIC TX-R32LX86K TV is carried out by the TNPA4638 power module, or its analogs using the MP2B6120 (C0DABYY00008), FA5501AN (C0DBBZG00004), C0DBBYG00001 and power switches of the B1CERQ000041 type.
MainBoard - the main board (motherboard) is a TNPH0729 module, using EEPROM chips: 24C16, Tuner: WJCE6353 and others.
The ENG39E04GF tuner provides reception of television programs and tuning to channels.
PANASONIC TX-32LX86 TV with LCD AX080A015A, 32 "(81 cm) in 16: 9 format. Dynamic contrast ratio 10000: 1 is provided by special control of the backlight depending on the illumination of areas in the scene.
The AX080A015A panel and TNPH0729 firmware enable HD viewing 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, 1080p. Multimedia file formats supported by the video processor: JPEG.
The power of the acoustic audio system is 20 W (2x10 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, audio x3, S-Video, component, SCART x2, 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 that supports resolutions: 640x480, 800x600, 1024x768, 1280x1024.
The power consumed by the TV in operating mode from the network is 140 watts.
Dimensions: with stand 820x572x250 mm, without stand 820x534x119 mm.
TV weight: with stand: 17 kg, without stand: 14 kg.
Attention! The AX080A015A panel of the PANASONIC TX-32LX86 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!