Technical description and composition of the PANASONIC TX-LR32C20 TV, panel type and modules used. The composition of the modules.PANASONIC
Model: TX-LR32C20 TX-L32C20
Chassis / Version: KM06
Panel: AX080A076G
T-CON: 19-100177
Inverter (backlight): integrated into PSU
PWM Inverter: STR-H3475, STR-H7214
MOSFET Inverter: B1CERG000030
Power Supply (PSU): TNP4G469 AA
PWM Power: FA5501AN (PFC), SSC9512, STR-A6059
MOSFET Power: B1CER000060, B1CERR000043
MainBoard: TNP4G466 2 A
IC MainBoard: C1AB00003250, 24C128, TAS5709
Tuner: ENG39F02GF
Control: IR: TNPA5134 1 V
TX-L32C20 Specifications
PANASONIC TX-LR32C20
General recommendations for TV LCD repair
Possible malfunctions
- The PANASONIC TX-LR32C20 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.
In such cases, the TNP4G469 power supply usually fails. It is necessary to measure its output voltages, and if they are absent (full or partial), the serviceability of the power switches (B1CER000060, B1CERR000043) of the converters and rectifier diodes should be checked for a possible short circuit.
In case of any breakdowns in the secondary circuits, the converter can operate in an emergency mode of a short circuit, and in the event of a short circuit in the power elements of the primary circuit, the mains fuse or the current sensor in the source of the key often breaks off.
The 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) FA5501AN (PFC), SSC9512, STR-A6059, if they do not have visible damage to the case and an open short circuit between the terminals, are usually checked by replacing.
- There is no picture, but there is sound, it reacts to the remote control. Or the image appears when turned on and disappears 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. If all the electrolytic capacitors of the filter for the power supply of the inverter are in good working order, you should make sure that the lamps are in good condition, then you need to check the keys of the converter and the secondary windings of the transformers.
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 TNP4G466 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). Complicated MB (SSB) repair is possible only in the conditions of a service center with the necessary equipment. Checking or replacing C1AB00003250, 24C128, TAS5709 elements requires the necessary training and professional skills in repairing modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by the warm-up method.
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 ENG39F02GF 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.
Users and owners of TVs need to remember that attempts to repair the PANASONIC TX-LR32C20 TV on their own without the appropriate qualifications and the necessary experience can lead to serious negative consequences!
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> PANASONIC TX-LR32C20 Chassis KM06 for TX-L32C20E, TX-L32C20ES
MainBoard TNP4G466 is shown in the figure below:TNP4G466
External view of the power supply
The main features of the PANASONIC TX-LR32C20 device:
Installed matrix (LCD panel) AX080A076G.
Matrix control uses Timing Controller (T-CON) 19-100177.
A converter combined with a power supply is used to power the backlight lamps, it is controlled by the STR-H3475, STR-H7214 PWM controller. The keys of the B1CERG000030 type are used as power elements of the inverter.
The formation of the necessary supply voltages for all nodes of the PANASONIC TX-LR32C20 TV is carried out by the TNP4G469 power module, or its analogs using FA5501AN (PFC), SSC9512, STR-A6059 microcircuits and power switches of the B1CER000060, B1CERR000043 type.
MainBoard - the main board (motherboard) is a TNP4G466 module, using C1AB00003250, 24C128, TAS5709 and others.
The ENG39F02GF tuner provides reception of television programs and tuning to channels.
PANASONIC TX-L32C20 TV with LCD AX080A076G, 32 "(81 cm) in 16: 9 format. Dynamic contrast ratio of 20,000: 1 is provided by special control of the backlight depending on the illumination of areas in the scene.
The AX080A076G panel and TNP4G466 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 480i, 480p, 576i, 576p, 720p, 1080i, 1080p standards. 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. 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 x2, audio x2, component, VGA, HDMI x3. 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 mains is 93 W.
Dimensions: with stand 798x551x217 mm, without stand 798x511x93 mm.
TV weight: with stand: 10 kg, without stand: 9 kg.
Attention! The AX080A076G panel of the PANASONIC TX-L32C20 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!