Technical description and composition of the PANASONIC TX-LR32C3 TV, panel type and modules used. The composition of the modules.PANASONIC
Model: TX-LR32C3 TX-L32C3
Chassis / Version: KM10E
Panel: VVX32H100G00 11092M N 635898
Inverter (backlight): integrated into PSU
PWM Inverter: BD9247F
MOSFET Inverter: K8A55DA
Trans Inverter: A995 N1H1
Power Supply (PSU): TNPA5361 AA 4
PWM Power: 2A11337 5591, 1B11906 5640
MOSFET Power: K12A60D, K4013
MainBoard: TNP8EA112 9
IC MainBoard: AN34043A, LV4924
Tuner: ENGS7302D5F
Control: IR: TNPA5378 1
TX-L32C3 Specifications
PANASONIC TX-LR32C3
General recommendations for TV LCD repair
Possible malfunctions
- The PANASONIC TX-LR32C3 TV does not turn on at all. No response to the remote control and front panel control buttons. Indicator lamps do not light up or flash.
In such cases, the TNPA5361 power supply usually fails. Its output voltages should be measured and, in their absence, the serviceability of the power switches (K12A60D, K4013) and rectifier diodes in the converters should be checked for possible breakdown.
In case of breakdowns in the secondary circuits, the converter, as a rule, can operate in an emergency mode in a short circuit mode, and in case of a short circuit in the power elements of the primary circuit, the mains fuse usually breaks.
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) 2A11337 5591, 1V11906 5640, 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 the remote control. Or, for a second, the image may appear immediately after switching on.
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 TNP8EA112 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). Repair of the board and replacement of the AN34043A, LV4924 microcircuits are made if the necessary equipment and the corresponding element base are available. Malfunctions associated with the use of BGA soldering technologies can be localized by the warm-up method.
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 ENGS7302D5F tuner 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-LR32C3 Chassis KM10E for models TX-L32C3E, TX-L32C3ES, TX-L32CX3E.
MainBoard TNP8EA112 is shown in the figure below:
TNP8EA112
External view of the power supply
The main features of the PANASONIC TX-LR32C3 device:
Installed matrix (LCD panel) VVX32H100G00 11092M N 635898.
A converter combined with a power supply is used to power the backlight lamps, it is controlled by the BD9247F PWM controller. The transformer A995 N1H1 is installed in the inverter converter. Keys of type K8A55DA are used as power elements of the inverter.
The formation of the necessary supply voltages for all nodes of the PANASONIC TX-LR32C3 TV is carried out by the TNPA5361 power module, or its analogs using 2A11337 5591, 1V11906 5640 microcircuits and power switches of the K12A60D, K4013 type.
MainBoard - the main board (motherboard) is a TNP8EA112 module, using AN34043A, LV4924 and others.
The ENGS7302D5F tuner provides reception of television programs and tuning to channels.
PANASONIC TX-L32C3 TV with LCD VVX32H100G00, 32 "(81 cm) diagonal, 16: 9 format.
The VVX32H100G00 panel and TNP8EA112 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 480i, 480p, 576i, 576p, 720p, 1080i, 1080p standards. Multimedia file formats supported by the video processor: MP3, 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, component, SCART, RGB, HDMI x2. 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, 1024x768, 1360x768, 1920x1080.
The digital tuner is able to receive terrestrial and cable channels in the DVB-T MPEG4, DVB-C standards.
The power consumed by the TV in operating mode from the network is 88 watts.
Dimensions: with stand 779x531x207 mm, without stand 779x497x84 mm.
TV weight: with stand: 9.5 kg, without stand: 8.5 kg.
Attention! Panel VVX32H100G00 11092M N 635898 LCD TV PANASONIC TX-L32C3 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!