Technical description and composition of the PANASONIC TX-LR32EM5A TV, panel type and modules used. The composition of the modules.PANASONIC LED
Model: TX-LR32EM5A TX-L32EM5A
Chassis / Version: KM19E
Panel: T320HVN01.2
T-CON: T315HW07 VB CTRL BD 31T14-C0J
LED driver (backlight): V341-001 4H + 3416.001 / B
PWM LED driver: DF3421
MOSFET LED driver: PA610AD
Power Supply (PSU): TNP4G531 1 P
PWM Power: CODBBYY00047 34A65 NCP1234AD65
MOSFET Power: B1CERR000067
MainBoard: TNP4G535 1 A
IC MainBoard: CPU: MT5367PAHU, DRAM: H5Q2G63DFR, SPI Flash: 25Q128BVFG, EEPROM: 24C64, SOUND: D5452A
Tuner: ENVS9301D5F
Control: IR: TNPA5719
TX-L32EM5A Specifications
PANASONIC TX-LR32EM5A
General recommendations for TV LCD LED repair
Possible malfunctions
- TV PANASONIC TX-L32EM5A does not turn on and does not give any signs of turning on, does not respond to control buttons and to the remote control.
Often in such cases the TNP4G531 power supply module is faulty. It is necessary to measure its output supply voltages, and in their absence, check the serviceability of the power switches of the converters and rectifier diodes for the probability of breakdown in semiconductor PN junctions.
In case of breakdowns of semiconductors in the secondary circuits of any converter, as a rule, it can operate in an emergency mode of short circuit without output voltages, and with a short circuit in the elements of the primary circuit, the mains fuse most often breaks off immediately 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 34A65, in the absence of visible damage or outright short circuits between the terminals, are checked by replacing them with new ones, or knowingly working properly.
- There is no image, there is sound, it reacts to the remote control, the channels are switched. In some cases, the image appears when turned on and disappears immediately.
Usually, in such cases, a malfunction is detected in the LED panel backlight nodes. 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.
When diagnosing, it must be borne in mind that it is impossible to check for an open in the circuit of the LED lines without disassembling the panels using a tester or multimeter. To open all PN junctions connected in series, a voltage of the order of several tens of volts is required, and ideally a current source. Opening the panel, you can check each LED separately. Typically, Chinese multimeters will lightly light one 3-volt LED when the probes are connected to it in the forward direction. 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, does not respond to the remote control. The indicator blinks or signals the standby mode.
Repair or diagnostics of the TNP4G535 motherboard should begin with checking the stabilizers and power converters required to power the microcircuits and matrix. If necessary, you should update or replace the software (software). If it is not possible to replace the MB (SSB) board, it is necessary to check the serviceability of its elements - CPU: MT5367PAHU, DRAM: H5Q2G63DFR, SPI Flash: 25Q128BVFG, EEPROM: 24C64, SOUND: D5452A. Defective components must be replaced.
If the TV operates normally from external devices, but does not tune to TV channels, the ENVS9301D5F tuner may be faulty. In such cases, first of all, you should make sure that there are supply voltages at its corresponding terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus. Sometimes the reason for the inoperability of the tuner may be a software failure.
We remind users again! Attempts to self-repair the PANASONIC TX-L32EM5A TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> PANASONIC TX-LR32EM5A Chassis KM19E
MainBoard TNP4G535 is shown in the figure below:TNP4G535
External view of the power supply
The main features of the PANASONIC TX-LR32EM5A device:
Installed matrix (LED panel) T320HVN01. 2.
The matrix control uses the T315HW07 Timing Controller (T-CON).
The LED driver V341-001 is used to power the backlight LEDs, controlled by the PWM controller DF3421. The keys of the PA610AD type are used as power elements of the LED driver.
The formation of the necessary supply voltages for all nodes of the PANASONIC TX-LR32EM5A TV is carried out by the TNP4G531 power module, or its analogs using CODBBYY00047 34A65 NCP1234AD65 microcircuits and B1CERR000067 power switches.
MainBoard - the main board (motherboard) is a TNP4G535 module using CPU: MT5367PAHU chips, DRAM: H5Q2G63DFR, SPI Flash: 25Q128BVFG, EEPROM: 24C64, SOUND: D5452A and others.
Tuner ENVS9301D5F provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: AUO
Model: T320HVN01.2
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1920x1080, FHD
Display Mode: AMVA, Normally Black, Transmissive
Active Area: 698.4x392.85 mm
Surface: Antiglare (Haze 2%), Hard coating (3H)
Brightness: 350 cd / m²
Contrast Ratio: 3000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 6.5 (G to G)
Frequency: 60Hz
Lamp Type: WLED Embedded (LED Driver)
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V
Brand: PANASONIC, Model:.
Briefly from TV:.
Manufacturer: HORIZON plant, Belarus, Minsk, st. S. Kovalevskaya, 62. Or - Czech Republic, Pilsen.
Developer: Panasonic Corporation. Japan.
