Technical description and composition of the PANASONIC TX-32LX1F TV, panel type and modules used. The composition of the modules.PANASONIC
Model: TX-32LX1F
Chassis / Version: LH18
Panel: LTA320W1-L01
Lamp backlight: 16 LAMP CCFL
T-CON: 320W1-L01 WXC4LV2.6
Inverter (backlight): K021055.02 AMBIT REV: 6 SIT320WD16C01
Power Supply (PSU): TNPA3072 3 & TNPA3071 1
MainBoard: TNPA3075 3 (Digital) & TNPH0566 2 (AV)
IC MainBoard: K4S643232H, THC63LVDM83R
Tuner: ENG29526G (TNPH0566 board)
Control: IR & Button Board TNPA3070 3
TX-32LX1T Specifications
PANASONIC TX-32LX1F
General recommendations for TV LCD repair
Possible manifestations of malfunctions
- The PANASONIC TX-32LX1F TV does not turn on and does not show any signs of operability at all. No response to the remote control and front panel control buttons.
In some of these cases, the main switching power supply, the TNPA3072 module, is faulty. In the absence of the necessary supply voltages in the secondary circuits of the converters, it is necessary to check the power switches and rectifier diodes for possible partial or complete breakdown.
In case of breakdowns of semiconductors in the secondary circuits of any converter, as a rule, it can operate in an emergency mode of short circuit without output voltages, and with a short circuit in the elements of the primary circuit, the mains fuse most often breaks off immediately and less often the current sensor in the source of the key.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements, which can disable it in key mode, or provoke an excess of the maximum current or voltage values. These can be circuits supplying the PWM controller, damper or frequency setting circuits, or OOS (negative feedback) elements in the stabilization circuit. PWM controllers (PWM), in the absence of external damage and short circuit between the terminals, are checked by replacing them with a known good one.
- There is no image, there is sound, it reacts to the remote control. Or, immediately after switching on for a second, the image may appear and immediately disappear.
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.
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 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 TNPA3075 motherboard should begin with checking the stabilizers and power converters required to power the microcircuits and the matrix. If necessary, you should update or replace the software (software). Complicated repair of MB (SSB) board is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace elements K4S643232H, THC63LVDM83R. Malfunctions in BGA chips are usually easy to detect by warm-up.
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 ENG29526G tuner (TNPH0566 board) and update the software. I2C communication pulses must be monitored with an oscilloscope.
Once again, we remind TV users: do not try to repair yourself without the appropriate knowledge, experience and the necessary qualifications! Trust the repairs to professionals with sufficient experience in the field of electronic repair.
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> PANASONIC TX-32LX1F Chassis LH18 for TX-32LX1F, TX-32LX1P, TX-32LX1V and TX-32LX1X, TX-32LX1M, TX-32LX1A, TX-32LX1T, TC-32LX1H, TC-32LX1DJ, TX-26LX1X, TX-26LX1M, TX-26LX1A, TX-26LX1T, TC-26LX1H
The MainBoard TNPA3075 is shown in the figure below:TNPA3075
External view of the power supply
The main features of the PANASONIC TX-32LX1F device:
Installed matrix (LCD panel) LTA320W1-L01.
Matrix control uses a Timing Controller (T-CON) 320W1-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-32LX1F TV is carried out by the TNPA3072 power module, or its analogs.
MainBoard - the main board (motherboard) is a TNPA3075 module, using the K4S643232H, THC63LVDM83R and others.
The ENG29526G tuner (TNPH0566 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!