Technical description and composition of the PANASONIC TX-R32LM70K TV, panel type and modules used. The composition of the modules.PANASONIC
Model: TX-R32LM70K TX-32LM70
Chassis / Version: GLP21MA
Panel: LTA320WT-L15
Lamp backlight: CCFL
T-CON: 320WTC4LV5.2
Inverter (backlight): KLS-S320BCI-M REV: 01
PWM Inverter: BD9886FV
MOSFET Inverter: BA662V
Power Supply (PSU): TNP0EP009 P 9
PWM Power: MR4040
MOSFET Power: integrated
MainBoard: TNP0EA009 A 9
IC MainBoard: CPU: VCT69 ***, EEPROM: 24C32 HDMI: SII9023
Tuner: ENGF7701GF
Control: IR: TNP0EV009 V 9
TX-32LM70 Specifications
PANASONIC TX-R32LM70K
General recommendations for TV LCD repair
Possible manifestations of malfunctions
- TV PANASONIC TX-R32LM70K 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 TNP0EP009 power supply module is faulty. In the absence of the necessary supply voltages in the secondary circuits of the converters, it is necessary to check the power switches (integrated) 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 with a short circuit in the power elements of the primary circuit, the mains fuse or the current sensor at the source of the key often breaks off.
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 a PWM controller, damper or frequency setting circuits, or OOS (negative feedback) elements in the stabilization circuit. PWM controllers (PWM) MR4040, 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, it reacts to the remote control. Or the image appears when turned on and immediately 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. If all the electrolytic capacitors of the filter for the power supply of the inverter are in good working order, you should make sure that the lamps are in good condition, then you need to check the converter keys and the secondary windings of the transformers.
Sometimes it is necessary to disable the inverter protection for diagnostic purposes. In such cases, special care must be taken during work, and the protective circuits must be restored immediately after the repair is completed.
- 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 TNP0EA009 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). In cases of complex MB (SSB) repairs and with the necessary skills and equipment, it may sometimes be necessary to replace its chips CPU: VCT69 ***, EEPROM: 24C32 HDMI: SII9023 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 ENGF7701GF tuner, first of all, you need to make sure that the software is correct, as well as the presence of the necessary levels of supply voltages and pulses of data exchange with the processor via the I2C bus on the corresponding tuner pins.
Attention to users! Self-repair of the PANASONIC TX-R32LM70K TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
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The appearance of the MainBoard TNP0EA009 is shown in the figure below:TNP0EA009
External view of the power supply
Main features of the PANASONIC TX-R32LM70K device:
Installed matrix (LCD panel) LTA320WT-L15.
Matrix control uses a Timing Controller (T-CON) 320WTC4LV5.2.
The KLS-S320BCI-M inverter is used to power the backlight lamps, it is controlled by the BD9886FV PWM controller. Keys of BA662V type are used as power elements of the inverter.
The formation of the necessary supply voltages for all nodes of the PANASONIC TX-R32LM70K TV is carried out by the TNP0EP009 power module, or its analogs using MR4040 microcircuits and integrated power switches.
MainBoard - the main board (motherboard) is a TNP0EA009 module, using CPU: VCT69 *** chips, EEPROM: 24C32 HDMI: SII9023 and others.
The ENGF7701GF tuner provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA320WT-L15
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: Normally Black, Transmissive
Active Area: 697.68x392.26 mm
Frequency: 60Hz
Lamp Type: CCFL
PANASONIC TX-32LM70 TV with LCD display LTA320WT-L15, 32 "(81 cm) 16: 9 format diagonal. Screen brightness of 500 cd / m² backlit by CCFL (EEFL) fluorescent lamps. Contrast as the ratio of maximum brightness to the minimum is 1200: 1.
The LTA320WT-L15 panel and TNP0EA009 firmware enable HD viewing at 1366x768 resolution 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 20 W (2x10 W) is 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, which supports resolutions: 640x480, 800x600, 1024x768, 1360x768.
The power consumed by the TV in operating mode from the network is 144 watts.
Dimensions: with stand 791x615x248 mm, without stand 791x563x107 mm.
TV weight: without stand: 16.5 kg.
Attention! The LTA320WT-L15 panel of the PANASONIC TX-32LM70 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!
