Technical description and composition of the PANASONIC TX-32LX1T TV, panel type and modules used. The composition of the modules.PANASONIC
Model: TX-32LX1T
Chassis / Version: LH18
Panel: LTA320W1-L01
Lamp backlight: 16 Lamp CCFL
Inverter (backlight): K021055.02 AMBIT REV: 6 SIT320WD16C01
Power Supply (PSU): TNPA3071 1 & 1TNPA3072 4
MainBoard: TNPH0607 1 (AV) & TNPA3075 3 (Digital)
IC MainBoard: K4S643232H, THC63LVDM83R
Tuner: ENG39609G (TNPH0607 board)
Control: IR & Button Board TNPA3070 AC 3
TX-32LX1T Specifications
PANASONIC TX-32LX1T
General recommendations for TV LCD repair
Possible manifestations of malfunctions
- The PANASONIC TX-32LX1T TV does not turn on, does not respond to the remote control and control panel buttons, the indicators do not light up or flash.
In such cases, the TNPA3071 power supply usually fails. It is then necessary to measure its output voltages and, if they are absent, the power switches and rectifier diodes of the converters should be checked 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 is most often cut off.
Breakdown of power switches (MosFet) in switching sources is sometimes caused by malfunctions of other circuit elements, for example, in the circuits supplying the PWM controller, frequency setting or damper, as well as in the circuits of Negative Feedback (OOS) stabilization. PWM controllers (PWM), if they do not have visible damage to the case and an outright short circuit between the terminals, are usually checked by replacing.
- There is no picture, but there is sound and reaction to commands from the remote control. Or the image appears immediately after switching on and disappears.
A defect can be caused by problems in the nodes or elements of the display backlight, or in the power supply of lamps or the inverter.After checking all the electrolytic capacitors of the filters that are involved in the power supply of the inverter, ring the power switches in its converter for breakdown and the secondary windings of the transformers for an open circuit.
Sometimes, for diagnostic purposes, it is necessary to disable the inverter protection. In such cases, special care must be taken during work, and the protective circuits must be restored immediately after the repair is completed.
- The TV does not go into operation, does not respond to the remote control. The indicator on the front panel is on or blinking.
Repair or diagnostics of the TNPH0607 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).
Before changing the ENG39609G tuner (TNPH0607 board), if it is not possible to tune to TV channels, you should make sure that there are supply voltages, which must be measured at the corresponding tuner pins and check the software for correctness. The pulses of data exchange between the tuner and the processor can be monitored with an oscilloscope
Users and owners of TVs should remember that attempts to repair the PANASONIC TX-32LX1T TV on their own without the appropriate qualifications and necessary experience can lead to serious negative consequences!
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> PANASONIC TX-32LX1T Chassis LH18 for models TX-32LX1X, TX-32LX1M, TX-32LX1A, TX-32LX1T, TC-32LX1H, TC-32LX1DJ, TX-26LX1X, TX-26LX1M, TX-26LX1A, TX-26LX1T, TC-26LX1H TX-32LX1X, TX-32LX1M, TX-32LX1A, TX-32LX1T, TC-32LX1H, TC-32LX1DJ, TX-26LX1X, TX-26LX1M, TX-26LX1A, TX-26LX1T, TC-26LX1H
MainBoard TNPH0607 is shown in the figure below:TNPH0607
External view of the power supply
Main features of the PANASONIC TX-32LX1T device:
Installed matrix (LCD panel) LTA320W1-L01.
The inverter K021055.02 is used to power the backlight lamps.
The formation of the necessary supply voltages for all nodes of the PANASONIC TX-32LX1T TV is carried out by the TNPA3071 power module, or its analogs.
MainBoard - the main board (motherboard) is a TNPH0607 module, using K4S643232H, THC63LVDM83R and others.
The ENG39609G tuner (TNPH0607 board) provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA320W1-L01
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1280x768, WXGA
Display Mode: PVA, Normally Black, Transmissive
Active Area: 687.36x412.42 mm
Surface: Antiglare (Haze 44%), Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 500: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 15/8 (Tr / Td)
Frequency: 60Hz
Lamp Type: 16 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V
PANASONIC TX-32LX1T TV with LCD display LTA320W1-L01, 32 "(81 cm) 16: 9 format diagonal. Screen brightness of 450 cd / m² provided by CCFL (EEFL) fluorescent lamps. Contrast as a ratio of maximum brightness to the minimum is 500: 1. The input analog video signal can be processed in PAL, SECAM, NTSC systems Graphic processing and image formation of the digital signal occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i.
The power of the acoustic audio system is 20 W (2 x 10 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 x4, S-Video x3, component, RGB, VGA. A headphone output is provided for individual listening. To connect a computer or laptop, a VGA connector (D-Sub 15) is used, which supports resolutions: 640x480, 800x600, 1024x768.
Dimensions: with stand 1000x652x321 mm,.
TV weight: 27 kg.
Attention! The LTA320W1-L01 panel of the PANASONIC TX-32LX1T 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!