Technical description and composition of the PANASONIC TX-32CR410 TV, panel type and modules used. The composition of the modules.PANASONIC LED
Model: TX-32CR410
Chassis / Version: KM25E
Panel: V320BJ7-PE1 // TZLP114KEAA1
LED driver (backlight): integrated into PSU
PWM LED driver: BL0100A (C0ZBZ0002197)
MOSFET LED driver: B1CFRR000028
Power Supply (PSU): TNP4G572
PWM Power: NCP1234AD100R2G (C0DBBYY00065)
MOSFET Power: TK8A65D (B1CERR000067)
MainBoard: TNP4G566
IC MainBoard: SPI FLASH: MX25L12835E, EEPROM: 24C64
Tuner: RE231TN
TX-32CR410 Specifications
PANASONIC TX-32CR410
General recommendations for TV LCD LED repair
Possible malfunctions
- PANASONIC TX-32CR410 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.
In such cases, you should start looking for a malfunction in the TNP4G572 power supply circuits. It is necessary to measure its output supply voltages, and in their absence, check the serviceability of the power switches (TK8A65D (B1CERR000067)) of the converters and rectifier diodes for the probability of breakdown in semiconductor PN junctions.
In case of breakdowns in the secondary circuits, the converter can operate in short-circuit mode, and in case of short-circuit in the elements of the primary circuit, the mains fuse usually breaks 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) NCP1234AD100R2G (C0DBBYY00065), if they have no visible damage to the case and an outright short circuit between the terminals, are usually checked by replacing.
- There is no picture, but there is sound and reaction to commands from the remote control. Or the image appears immediately after switching on and disappears.
The most likely problem in these cases is a malfunction of the LED backlight. 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 if you connect the probes 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 broken through in the K / Z.
- 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 TNP4G566 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). Complicated repair of MB (SSB) board is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the SPI FLASH: MX25L12835E, EEPROM: 24C64. BGA chip faults are usually easy to detect by warm-up.
Failure of the RE231TN tuner is established after checking the software and all supply voltages at its outputs. The data exchange of the tuner with the processor via the I2C bus can be monitored with an oscilloscope.
Once again, we remind TV users: do not try to repair yourself without the appropriate knowledge, experience and the necessary qualifications! Trust the repair to professionals with sufficient experience in the field of electronic repair.
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> PANASONIC TX-32CR410 Chassis KM25E
If the PANASONIC TX-32CR410 has no picture, but there is sound, the backlight of the V320BJ7-PE1 display often simply does not work. Moreover, in LED TVs, the LEDs inside the panel usually fail, less often the LED driver.
In such cases, you can see a barely noticeable image with a successful hit of external light on the screen.
Replacing the LEDs requires disassembling the V320BJ7-PE1 LCD panel - a process that requires experience and qualifications from the master. We do not recommend doing such work on your own to the owners of TVs and craftsmen who do not have experience in repairing LCD panels
If there is no image, and the backlight is on, the screen becomes slightly lighter when turned on, and in an open TV you can see the light through the holes in the panel case.
In this case, the panel may also be faulty - damage to strips, loops, for example, as a result of moisture ingress after unsuccessful washing of the screen, the T-CON (Timing Controller) board may be faulty. But the main board MainBoard TNP4G566 often turns out to be faulty, a software failure is also possible.
Then, first of all, it is necessary to check the panel supply voltage, the fuses on the T-CON board, as well as the supply and reference voltages of the column and line drivers - VGH, VGL, Vcom.
If these measurements are within normal limits, it is necessary to trace the passage of LVDS signals from the MainBoard TNP4G566 with an oscilloscope, as well as synchronizing signals to the loops with drivers.
Flooded or unsuccessfully washed screens of LED-TVs can be restored, in about half of the cases, usually if significant damage has not formed in the cables and panel strips.
MainBoard TNP4G566 is shown in the figure below:
TNP4G566
External view of the power supply
The main features of the PANASONIC TX-32CR410 device:
Installed matrix (LED panel) V320BJ7-PE1 or TZLP114KEAA1.
To power the backlight LEDs, a converter combined with a power supply is used, controlled by a BL0100A PWM controller (C0ZBZ0002197). The keys of the B1CFRR000028 type are used as power elements of the LED driver.
The formation of the necessary supply voltages for all nodes of the PANASONIC TX-32CR410 TV is carried out by the TNP4G572 power module, or its analogs using NCP1234AD100R2G microcircuits (C0DBBYY00065) and power switches of the TK8A65D type (B1CERR000067).
MainBoard - the main board (motherboard) is a TNP4G566 module, using SPI FLASH chips: MX25L12835E, EEPROM: 24C64 and others.
Tuner RE231TN provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: INNOLUX
Model: V320BJ7-PE1
Type: a-Si TFT-LCD, CELL
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: MVA, Normally Black
Active Area: 697.685x392.256 mm
Surface: Antiglare (Haze 2%), Hard coating (2H)
Glass Depth: 0.50 + 0.50 mm
Transmissivity: 6.86% (with Polarizer)
Contrast Ratio: 1400
Display Colors: 16.7M (8-bit)
Frequency: 60Hz
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
TV PANASONIC TX-32CR410 with LCD V320BJ7-PE1, diagonal size 32 "(81 cm) 16: 9 format. The technology of production of the screen of this TV model is realized with LED backlighting.
The V320BJ7-PE1 panel and TNP4G566 board firmware can display HD images 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, 1080p. Multimedia file formats supported by the video processor: MP3, WMA, MPEG4, MKV, JPEG.
The power of the acoustic audio system is 20 W (2x10 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, 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: 640x480, 800x600, 1024x768, 1360x768.
The digital tuner is capable of receiving terrestrial and cable channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
Attention! The V320BJ7-PE1 panel of the PANASONIC TX-32CR410 LED TV is the most expensive element.
Do not allow any impact on the glass and pressure on the screen surface to avoid damage to the LED panel!
It is unsafe for liquid to spill onto the screen. Sometimes one drop is enough if it drips down the glass onto the cables to make the TV unrepairable.