Technical description and composition of the PANASONIC TX-LR32C21 TV, panel type and modules used. The composition of the modules.PANASONIC
Model: TX-LR32C21 TX-L32C21
Chassis / Version: KM06
Panel: AX080A076G
T-CON: 19-100177
Inverter (backlight): integrated into PSU
PWM Inverter: STR-H7214, STR-H3475
MOSFET Inverter: B1CERG000030
Power Supply (PSU): TNP4G469 AA
PWM Power: STR-A6059 (Stb), FA5501AN (PFC), SSC9512
MOSFET Power: B1CERR000043, B1CER000060
MainBoard: TNP4G466 (3) A
IC MainBoard: C1AB00003250, 24C128, TAS5709
Tuner: ENG39F02GF
Control: IR: TNPA5134
TX-L32C21 Specifications
PANASONIC TX-LR32C21
General recommendations for TV LCD repair
Possible manifestations of malfunctions
- PANASONIC TX-LR32C21 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.
Most often, with such manifestations, the main power supply module TNP4G469 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 (B1CERR000043, B1CER000060) and rectifier diodes for possible partial or complete breakdown.
In case of any breakdowns in the secondary circuits, the converter can operate in an emergency mode of a short circuit, and in the event of a short circuit in the power elements of the primary circuit, the mains fuse or the current sensor in the source of the key often breaks off.
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 controller, in frequency setting or damper circuits, as well as in negative feedback stabilization. PWM microcircuits (PWM) STR-A6059 (Stb), FA5501AN (PFC), SSC9512 are usually checked by replacing them with new ones, or knowingly working.
- There is no picture, but there is sound, it reacts to the remote control. Or the image appears when turned on and disappears immediately
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 indicator blinks or is on constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the TNP4G466 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). In cases of complex MB (SSB) repairs and with the necessary skills and equipment, it may sometimes be necessary to replace its C1AB00003250, 24C128, TAS5709 chips and other possible faulty components. Malfunctions associated with the use of BGA soldering technologies are usually easily diagnosed by the warm-up method.
If you suspect a malfunction of the ENG39F02GF tuner, first of all, you need to make sure that the software is correct, as well as the presence of the required levels of supply voltages and pulses of data exchange with the processor via the I2C bus on the corresponding terminals of the tuner.
Attention to TV owners! Attempts to repair PANASONIC TX-LR32C21 on your own are not recommended by the manufacturer and can lead to serious negative consequences!
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> PANASONIC TX-LR32C21 Chassis KM06 PANASONIC TX-LR32C21
MainBoard TNP4G466 is shown in the figure below:TNP4G466
External view of the power supply
The main features of the PANASONIC TX-LR32C21 device:
Installed matrix (LCD panel) AX080A076G.
Matrix control uses Timing Controller (T-CON) 19-100177.
A converter combined with a power supply is used to power the backlight lamps, it is controlled by a STR-H7214, STR-H3475 PWM controller. The keys of the B1CERG000030 type are used as power elements of the inverter.
The formation of the necessary supply voltages for all nodes of the PANASONIC TX-LR32C21 TV is carried out by the TNP4G469 power module, or its analogs using STR-A6059 (Stb), FA5501AN (PFC), SSC9512 microcircuits and B1CERR000043, B1CER000060 power switches.
MainBoard - the main board (motherboard) is a TNP4G466 module, using C1AB00003250, 24C128, TAS5709 and others.
The ENG39F02GF tuner provides reception of television programs and tuning to channels.