Technical description and composition of the PANASONIC TX-L39BL6E TV, panel type and modules used. The composition of the modules.PANASONIC LED
Model: TX-L39BL6E
Chassis / Version: LA41
Panel: V390HJ1-LE6 REV.C4 CHIMEI INNOLUX
LED backlight: EDGE LED
T-CON: V500HJ1-CE1
LED driver (backlight): TNP4G552 1LD
PWM LED driver: SMD 28pin
Power Supply (PSU): TNPA5806 2 P
PWM Power: FA5760N, FA5696N, LV5980MC
MOSFET Power: STD7NM60
MainBoard: TNPH1041 1 A
IC MainBoard: MT5590CAHJ, K4B2G1646E-BQKO, H27U4G8F2DTR, AN34043A
Tuner: TDSA-G220D
Appearance
PANASONIC TX-L39BL6E
General recommendations for TV LCD LED repair
Possible malfunctions
- The PANASONIC TX-L39BL6E does not turn on, the indicators on the front panel do not light or flash. The TV does not respond to control buttons and the remote control.
Usually, with such manifestations, the defect is caused by faulty elements in the main TNPA5806 power supply module. Then we recommend measuring its output voltages and, in their absence, you should check the serviceability of the power switches (STD7NM60) and rectifier diodes of the converters for a possible short circuit.
In case of breakdowns of semiconductors in the secondary circuits, the converter can usually 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 often breaks.
Breakdown of Mos-Fet switches used in switching power supplies is often caused by malfunctions of other elements, for example, in the power supply circuit of the PWM regulator, in frequency setting or damper circuits, as well as in negative feedback stabilization. PWM microcircuits (PWM) FA5760N, FA5696N, LV5980MC are usually checked by replacing them with new ones, or knowingly working.
- 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.
Most likely in these cases is a malfunction of the LED panel backlight. The reason for this may be an open circuit in the LED circuit, or a problem in stabilizing their power supply.
To check the health of the LED circuit, it is better to use a current source with a maximum voltage of 200V. We do not recommend using any voltage sources for this purpose. You can check each LED separately with a simple Chinese multimeter (powered by 9 volts) in the P-N transition test mode. If you connect the red probe of the multimeter to the anode of the LED, and the black one to its cathode, then the 3-volt LED will light up slightly, and in the opposite direction you can detect the transition of the emergency zener diode. The serviceability of the PN junction of the Zener diode indirectly indicates the serviceability of the LED-a
- 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 TNPH1041 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). Often the MB (SSB) board needs to be replaced in the event of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - MT5590CAHJ, K4B2G1646E-BQKO, H27U4G8F2DTR, AN34043A and replace the failed chips with new ones. Some malfunctions may be associated with the use of BGA soldering technologies in modern Main Board. Usually such defects are detected by local heating of the chip.
In cases where 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 terminals of the TDSA-G220D tuner match. 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.
Attention to TV owners! Attempts to repair PANASONIC TX-L39BL6E on your own are not recommended by the manufacturer and can lead to serious negative consequences!
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> PANASONIC TX-L39BL6E Chassis LA41
The appearance of the MainBoard TNPH1041 is shown in the figure below:TNPH1041
External view of the power supply
The main features of the PANASONIC TX-L39BL6E device:
Installed matrix (LED panel) V390HJ1-LE6 REV.C4 CHIMEI INNOLUX.
Matrix control uses the V500HJ1-CE1 Timing Controller (T-CON).
To power the backlight LEDs, the TNP4G552 LED driver is used, controlled by the SMD 28pin PWM controller.
The formation of the necessary supply voltages for all nodes of the PANASONIC TX-L39BL6E TV is carried out by the TNPA5806 power module, or its analogs using FA5760N, FA5696N, LV5980MC microcircuits and STD7NM60 type power switches.
MainBoard - the main board (motherboard) is a TNPH1041 module using MT5590CAHJ, K4B2G1646E-BQKO, H27U4G8F2DTR, AN34043A and others.
The TDSA-G220D tuner provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: CHIMEI INNOLUX
Model: V390HJ1-LE6
Type: a-Si TFT-LCD, Panel
Diagonal size: 39 inch
Resolution: 1920x1080, FHD
Display Mode: Super MVA, Normally Black, Transmissive
Active Area: 853.92x480.33 mm
Surface: Antiglare (Haze 1%), Hard coating (3H)
Brightness: 350 cd / m²
Contrast Ratio: 3500: 1
Display Colors: 16.7M (8-bit), CIE1931 68%
Response Time: 8.5 (G to G)
Frequency: 60Hz
Lamp Type: WLED Embedded (LED Driver)
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V
