Technical description and composition of the PANASONIC TX-LR32E30 TV, panel type and modules used. The composition of the modules.PANASONIC LED
Model: TX-LR32E30
Chassis / Version: LA18
Panel: VVX32F115G00
T-CON: 19-100317
LED driver (backlight): TNPA5377 1LD
Power Supply (PSU): TNPA5364 TNPA5364AD TNPA5364AD 3P
PWM Power: FA5590N, MP2C6120
MOSFET Power: TK12A60D
MainBoard: TNPH0931 1 A
IC MainBoard: MN2WS0200LE, X24CL32E30E
Tuner: ENGS7302D5F DVB-T / T2 / C
Appearance
PANASONIC TX-LR32E30
General recommendations for TV LCD LED repair
Possible manifestations of malfunctions
- The PANASONIC TX-LR32E30 TV does not turn on, does not respond to the remote control and control panel buttons, the indicators do not light up or flash.
Most often, with similar manifestations, the main power supply module TNPA5364 turns out to be faulty. In the absence of the necessary supply voltages in the secondary circuits of the converters, it is necessary to check the power switches (TK12A60D) and rectifier diodes for possible partial or complete breakdown.
In case of any breakdowns 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 power switches used in switching power supplies sometimes fail due to a malfunction of any other elements that can disable it in the key mode, or create an excess of the maximum permissible key parameters. These can be elements supplying a PWM regulator, frequency setting or damper circuits, or elements of negative feedback in the stabilization circuit. PWM controllers FA5590N, MP2C6120, in the absence of visible damage or outright short circuits between the terminals, are checked by replacing them with new ones, or known to be working properly.
- There is no picture, but there is sound, it reacts to the remote control. Or the image appears when turned on and disappears immediately
In some of these cases, the malfunction is caused by the lack of display backlighting. The reason may be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
Without a special current source, it is impossible to check the line of series-connected LEDs, and it is unsafe for them to use any voltage sources over 12V for this purpose. Then all that remains is to open the panel and check each LED separately. Usually, Chinese multimeters with 9V power supply lightly light up one 3-volt LED, if you connect the probes to it in the forward direction, the red probe to the anode, the black one to the cathode. For dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of the LED health. In the event of a malfunction of the LED, its zener diode will either be cut off or pierced in the K / Z.
- The TV does not turn on, the indicator signals the standby or operating mode, or blinks.
Repair or diagnostics of the TNPH0931 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 microcircuits MN2WS0200LE, X24CL32E30E 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 you suspect a malfunction of the ENGS7302D5F DVB-T / T2 / C tuner, first of all, you need to make sure that the software is correct, as well as the presence of the required supply voltage levels and pulses of data exchange with the processor via the I2C bus on the corresponding tuner pins.
Owners and users of the PANASONIC TX-LR32E30 TV should remember that self-repair without special knowledge, skills and qualifications may be fraught with negative consequences that can lead to complete non-repairability of the device!
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> PANASONIC TX-LR32E30 Chassis LA18 for models TX-L32E30E, TX-LF32E30, TX-LR32E30, TX-L37E30E, TX-LF37E30
The MainBoard TNPH0931 is shown in the figure below:TNPH0931
External view of the power supply
Main features of the PANASONIC TX-LR32E30 device:
Installed matrix (LED-panel) VVX32F115G00.
Matrix control uses Timing Controller (T-CON) 19-100317.
The TNPA5377 LED driver is used to power the backlight LEDs.
The formation of the necessary supply voltages for all nodes of the PANASONIC TX-LR32E30 TV is carried out by the TNPA5364 power module, or its analogues using FA5590N, MP2C6120 microcircuits and power switches of the TK12A60D type.
MainBoard - the main board (motherboard) is a TNPH0931 module, using MN2WS0200LE, X24CL32E30E and others.
The ENGS7302D5F DVB-T / T2 / C tuner provides reception of television programs and tuning to channels.
