Technical description and composition of the PANASONIC TX-LR32B6 TV, panel type and modules used. The composition of the modules.PANASONIC
Model: TX-LR32B6
Chassis / Version: KM21E
Panel: LC320DXN (SF) (R2)
T-CON: 32-37 R0W2.1 HD VER 0.1 6870C-0442B
Inverter (backlight): 6917L-0126A PPW-LE32RH-0 (A) Rev0.7
Power Supply (PSU): TNPA5808
PWM Power: NCP1234
MOSFET Power: B1CERR000086 (650V 10A)
MainBoard: TNP4G548
IC MainBoard: Peaks-sLD8, MT29F1G08ABAEAH, K4B1G1646G-BCK0
Tuner: TDSA-G220D
Control: IR: TNPA5822
TX-LR32B6 Specifications
PANASONIC TX-LR32B6
General recommendations for TV LCD repair
Possible manifestations of malfunctions
- PANASONIC TX-LR32B6 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 likely in this case the main switching power supply (SMPS) TNPA5808 is faulty. Its output voltages should be measured and, in their absence, the power switches (B1CERR000086 (650V 10A)) and rectifier diodes should be checked for the probability of a short circuit in the converters.
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 is often cut off.
Breakdown of power switches (MosFet) in switching sources is sometimes caused by malfunctions of other circuit elements, for example, in the circuits supplying the PWM controller, frequency setting or damper, as well as in the circuits of Negative Feedback (OOS) stabilization. PWM controllers (PWM) NCP1234, if they do not have visible damage to the case and an outright short circuit between the terminals, are usually checked by replacing.
- There is no image, there is sound, it reacts to the remote control. Or, immediately after switching on for a second, the image may appear and immediately disappear.
The defect can be caused by problems in the nodes or elements of the display backlight, or in the power supply of the lamps or the inverter.
Sometimes, for diagnostic purposes, it is necessary to disable the inverter protection. 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 TNP4G548 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 Peaks-sLD8, MT29F1G08ABAEAH, K4B1G1646G-BCK0 chips and other possible faulty components. Malfunctions associated with the use of BGA soldering technologies are usually easily diagnosed by the warm-up method.
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 TDSA-G220D tuner outputs 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.
Users and owners of TVs should remember that attempts to self-repair the PANASONIC TX-LR32B6 TV without the appropriate qualifications and the necessary experience can lead to serious negative consequences!
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> PANASONIC TX-LR32B6 Chassis KM21E for TX-LR32B6
The composition uses MainBoard TNP4G548 and LCD-panel LC320DXN (SF) (R2).
Power supply unit (PSU) TNPA5808 Power Supply.
The MainBoard TNP4G548 is shown in the figure below:TNP4G548
External view of the power supply
The main features of the PANASONIC TX-LR32B6 device:
Installed matrix (LCD panel) LC320DXN (SF) (R2).
Matrix control uses Timing Controller (T-CON) 32-37.
Inverter 6917L-0126A is used to power the backlight lamps.
The formation of the necessary supply voltages for all nodes of the PANASONIC TX-LR32B6 TV is carried out by the TNPA5808 power module, or its analogs using NCP1234 microcircuits and power switches of the B1CERR000086 type (650V 10A).
MainBoard - the main board (motherboard) is a TNP4G548 module, using Peaks-sLD8, MT29F1G08ABAEAH, K4B1G1646G-BCK0 and others.
The TDSA-G220D tuner provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: LG Display
Model: LC320DXN-SFR2
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: IPS, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare (Haze 10%), Hard coating (3H)
Brightness: 300 cd / m²
Contrast Ratio: 1200: 1
Display Colors: 16.7M (8-bit), CIE1931 68%
Response Time: 6 (G to G)
Frequency: 60Hz
Lamp Type: WLED Embedded (LED Driver)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
The composition uses MainBoard TNP4G548 and LCD-panel LC320DXN (SF) (R2).
Power supply unit (PSU) TNPA5808 Power Supply.
TV PANASONIC TX-LR32B6 with LCD LC320DXN, diagonal size 32 "(81 cm) 16: 9 format. The technology of manufacturing the screen of this TV model is realized with LED backlighting.
The LC320DXN panel and TNP4G548 board firmware enable HD viewing at 1366x768 pixels 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. Multimedia file formats supported by the video processor: MP3, WMA, MPEG4, MKV, JPEG.
The power of the acoustic audio system is 10 W (2x5 W) 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, component, SCART, RGB, HDMI x2, USB. 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: 1360x768.
The digital tuner is capable of receiving terrestrial and cable channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
The power consumed by the TV in operating mode from the network is 67 W.
Dimensions: with stand 741x515x184 mm, without stand 741x450x78 mm.
TV weight: with stand: 7 kg, without stand: 6 kg.
Attention! The LC320DXN (SF) (R2) panel of the PANASONIC TX-LR32B6 LED TV is its most expensive element.
Do not allow any impact on the glass and pressure on the screen surface to avoid damage to the LED panel!
Liquid spillage on the screen is unsafe. Sometimes one drop is enough if it drips down the glass onto the cables to make the TV unrepairable.