Technical description and composition of the PANASONIC TX-L32CX3 TV, panel type and modules used. The composition of the modules.PANASONIC
Model: TX-L32CX3 TX-L32CX3E
Chassis / Version: GLP26
Panel: VVX32H100G00
Inverter (backlight): integrated into PSU
PWM Inverter: BD9247F
MOSFET Inverter: K8A55DA
Trans Inverter: A995 N1H1
Power Supply (PSU): TNPA5361 DA 2 P
PWM Power: 2A11337 5591, 1B11906 5640
MOSFET Power: K12A60D, K4013
MainBoard: TNP8EA112 9 A
IC MainBoard: AN34043A, LV4924
Tuner: ENGS7302D5F
Control: IR: TNPA5378
TX-L32CX3 Specifications
PANASONIC TX-L32CX3
General recommendations for TV LCD repair
Possible manifestations of defects
- TV PANASONIC TX-L32CX3 does not turn on and does not show any signs of turning on, does not respond to control buttons and to the remote control.
In such cases, the fault should be found primarily in the TNPA5361 power supply module. 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 any breakdown of semiconductors in the secondary circuits, the converter can usually operate normally in an emergency short-circuit mode. There are no output voltages. And with a short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks 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) 2A11337 5591, 1B11906 5640, in the absence of external damage and short circuit between the terminals, are checked by replacing them with known good ones.
- 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). In cases of attempts to repair the MB (SSB) board, it is necessary to check the serviceability of its elements - AN34043A, LV4924, which may need to be replaced with new ones. If a BGA processor is installed, there is a possibility of a violation of the soldering of the contacts of its pins with the board (indicated by heating).
A malfunction of the ENGS7302D5F tuner is established after checking the software and all supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can 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-L32C3E, TX-L32C3ES, TX-L32CX3E Chassis GLP26 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-L32CX3 device:
Installed matrix (LCD panel) VVX32H100G00.
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-L32CX3 TV is carried out by the TNPA5361 power module, or its analogs using 2A11337 5591, 1B11906 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-L32CX3 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, 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! The VVX32H100G00 panel of the PANASONIC TX-L32CX3 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!