Technical description and composition of the PANASONIC TX-23LX60P TV, panel type and modules used. The composition of the modules.PANASONIC
Model: TX-23LX60P
Chassis / Version: GLP21
Panel: LTA230W2-L03
T-CON: 230W2C4LV1.4
Inverter (backlight): SIT230WD06B04. GH179A REV1.0
Power Supply (PSU): TNP8EPL40
PWM Power: MR4030
MOSFET Power: integrated
MainBoard: TNP8EAL40 A 8
IC MainBoard: VCT6973G, TEA6422DT, 24C32AN, TDA8931T
Tuner: ENG37A21GF (board TNP8EBL40)
Control: IR: TNP8EVL40
TX-23LX60P Specifications
PANASONIC TX-23LX60P
General recommendations for TV LCD repair
Possible manifestations of defects
- PANASONIC TX-23LX60P does not turn on and does not show any signs of operability at all. Does not blink indicators and does not respond to control buttons.
In some of these cases, the fault is detected in the TNP8EPL40 power supply module. It is necessary to measure its output supply voltages, and in their absence, check the serviceability of the power switches (integrated) converters and rectifier diodes for the probability of breakdown in semiconductor PN junctions.
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.
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) MR4030, in the absence of external damage and a short circuit between the terminals, are checked by replacing them with a known good one.
- 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.
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.
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 TV does not turn on, does not respond to the remote control. The indicator blinks or signals the standby mode.
Repair or diagnostics of the TNP8EAL40 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). In cases of complex MB (SSB) repairs and with the necessary skills and equipment, it may sometimes be necessary to replace its VCT 6973G B2 000, 24C32AN, TDA8931T chips and other possible defective components. Malfunctions associated with the use of BGA soldering technologies are usually easily diagnosed by the warm-up method.
The malfunction of the ENG37A21GF tuner (board TNP8EBL40) is established after checking the software and all supply voltages at its outputs. The data exchange of the tuner with the processor via the I2C bus can be monitored with an oscilloscope.
Attention to users! Self-repair of the PANASONIC TX-23LX60P TV without appropriate qualifications and the necessary experience can lead to its complete non-repairability!
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> PANASONIC TX-23LX60P Chassis GLP21 for TX-23LX60F, TX-23LX60P
MainBoard TNP8EAL40 is shown in the figure below:TNP8EAL40
Main features of the PANASONIC TX-23LX60P device:
Installed matrix (LCD panel) LTA230W2-L03.
Matrix control uses Timing Controller (T-CON) 230W2C4LV1.4.
The SIT230WD06B04 inverter is used to power the backlight lamps.
The formation of the necessary supply voltages for all nodes of the PANASONIC TX-23LX60P TV is carried out by the TNP8EPL40 power module, or its analogs using MR4030 microcircuits and integrated power switches.
MainBoard - the main board (motherboard) is a TNP8EAL40 module with VCT6973G, TEA6422DT, 24C32AN, TDA8931T and others.
The ENG37A21GF tuner (board TNP8EBL40) provides reception of television programs and tuning to channels.
PANASONIC TX-23LX60P TV with LCD LTA230W2-L03, 23 "16: 9. Brightness of the screen 550 cd / m2 provided by CCFL (EEFL) fluorescent lamps. Contrast, as the ratio of maximum brightness to minimum, is 1200 :1.
The LTA230W2-L03 panel and TNP8EAL40 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 standards 480i, 480p, 576i, 576p, 720p, 1080i.
The power of the acoustic audio system is 6 W (2x3 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, audio x2, S-Video, component, SCART x2, 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, 800x600, 1024x768, 1280x1024, 1360x768.
Dimensions: with stand 565x453x260 mm, without stand 565x411x115 mm.
TV weight: without stand: 10 kg.
Attention! The LTA230W2-L03 panel of the PANASONIC TX-23LX60P 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!