Technical description and composition of the PANASONIC TX-40CSR520 TV, panel type and modules used. The composition of the modules.
PANASONIC LED
Model: TX-40CSR520
Chassis / Version: LA61
Panel: V400HJ6-LE8
LED backlight: 31A54N0L
LED driver (backlight): integrated into PSU
PWM LED driver: BD9479FV (C0ZBZ0002164)
Power Supply (PSU): TNPA6070
PWM Power: FA1A02N (C0DBBYY00089), FA6A00AN (C0DBAYY02411), NR131S
MOSFET Power: K10P60W (B1CFRR000028)
MainBoard: TNP4G568
IC MainBoard: CPU: PEAKS-sLD8A, LNBH29PT (PWM)
Tuner: TDSA-G320D
TX-40CSR520 Specifications
PANASONIC TX-40CSR520
General recommendations for TV LCD LED repair
Possible manifestations of defects
- PANASONIC TX-40CSR520 TV does not turn on. There are no signs of operability. The indicators on the front panel do not light or blink, the TV does not respond to the control buttons.
Most often, with similar manifestations, the main power supply module TNPA6070 turns out to be faulty. It is necessary to measure its secondary output voltages, and if they are absent, check the power switches (K10P60W (B1CFRR000028)) and rectifier diodes in the converters for a short circuit.
In case of any breakdowns of semiconductors in the secondary circuits, the converter can usually operate normally in an emergency short circuit mode. There are no output voltages. And with a short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and, less often, the current sensor in the source of the key.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can disable it in the key mode, or provoke an excess of the maximum current or voltage values. These can be circuits supplying the PWM controller, damper or frequency setting circuits, or OOS (negative feedback) elements in the stabilization circuit. PWM controllers (PWM) FA1A02N (C0DBBYY00089), FA6A00AN (C0DBAYY02411), NR131S, in the absence of external damage and short circuit between the terminals, are checked by replacing them with known good ones.
- There is no picture, but there is sound and all other functions work. Sometimes when you turn it on, the image appears and disappears for a second.
The most likely problem in these cases is a malfunction of the LED backlight. The reason can sometimes be in the power supply of the LEDs, but more often in their malfunction (breakdown or open circuit), sometimes in the violation of the contact connections of the 31A54N0L LED strips.
To identify an open circuit in the LED lines without disassembling the panel, a current source is required. It is impossible to open the junctions connected in series with a simple multimeter; a voltage of several tens of volts is required.
If the PANASONIC TX-40CSR520 has no picture, but there is sound, often the display backlight 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 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 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 often the main board MainBoard turns out to be faulty, a software failure is also possible.
Then, first of all, you need to check the panel supply voltage, 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 the normal range, it is necessary to use an oscilloscope to trace the passage of LVDS signals from the MainBoard, 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 loops and panel strips.
- The TV does not turn on, the indicator signals the standby or operating mode, or blinks.
Repair or diagnostics of the TNP4G568 motherboard should begin with checking the stabilizers and power converters required to power the microcircuits and the matrix. If necessary, you should update or replace the software (software). When repairing an MB board, you need to check its CPU components: PEAKS-sLD8A, LNBH29PT (PWM). Defective elements must be replaced. If chips with BGA soldering technology are used, the problem in its implementation is detected by local heating of the chip.
If you suspect a malfunction of the TDSA-G320D 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 terminals of the tuner.
Attention! Users and owners of TX-40CSR520 TVs who do not have the appropriate qualifications, knowledge and experience are strongly discouraged from attempting to repair themselves in order to avoid negative consequences that may lead to the complete non-repairability of the device. And those geniuses changing randomly the mainboards or upgrading wrongly firmware or messing with service modes are better to go to play videorealgames like "head against the wall" infinite times instead..............
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ---> PANASONIC TX-40CSR520 Chassis LA61.
The MainBoard TNP4G568 is shown in the figure below:
TNP4G568
External view of the power supply
The main features of the PANASONIC TX-40CSR520 device:
Installed matrix (LED panel) V400HJ6-LE8.
To power the backlight LEDs, a converter combined with a power supply is used, controlled by a BD9479FV PWM controller (C0ZBZ0002164).
The formation of the necessary supply voltages for all the nodes of the PANASONIC TX-40CSR520 TV is carried out by the TNPA6070 power module, or its analogs using the FA1A02N (C0DBBYY00089), FA6A00AN (C0DBAYY02411), NR131S and K10P60R0000 (B281CFR).
MainBoard - the main board (motherboard) is a TNP4G568 module, using CPU chips: PEAKS-sLD8A, LNBH29PT (PWM) and others.
The TDSA-G320D tuner provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: CHIMEI INNOLUX
Model: V400HJ6-LE8
Type: a-Si TFT-LCD, Panel
Diagonal size: 40 inch
Resolution: 1920x1080, FHD
Display Mode: Super MVA, Normally Black, Transmissive
Active Area: 878.112x485.352 mm
Surface: Antiglare (Haze 1%), Hard coating (3H)
Brightness: 300 cd / m²
Contrast Ratio: 3500: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 9.5 (G to G)
Frequency: 60Hz
Lamp Type: WLED Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V
Instructions and updates
Software Update - Software / Firmware Update:
Version Ver. 3.021 from 21 Apr. 2020. File P151_3021.zip 94 054 120 bytes.
For models TX-24CS500E, TX-24CSW504, TX-32CS510E, TX-32CS600E, TX-32CS600EW, TX-32CSF607, TX-32CSN608, TX-32CST606, TX-32CSW514, TX-32CSW514S, TX-32CSW604 TX-40CS520E, TX-40CSW524, TX-40CSW524S, TX-50CS520E, TX-50CSW524, TX-50CSW524S, TX-55CS520E, TX-55CSW524, TX-24CS500B, TX-32CS510B5, TX-32CCS 50CS520B, TX-55CS520B, TX-32CSR510, TX-40CSR520.
You can download the file and update instructions on the manufacturer's website for the TX-40CSR520 model.
Update results:
Date / Version Additions / Changes
Apr. 21, 2020 Ver. 3.021 Improved network application.
Jul. 12, 2016 Ver. 3.020 Improved system stability.
Jun. 23, 2015 Ver. 3.014 Improved system stability.
TV PANASONIC TX-40CSR520 with LCD display, diagonal size 40 "(102 cm) 16: 9 format. The technology of production of the screen of this TV model is realized with LED backlighting.
The design and technical capabilities of the TV can provide viewing of broadcasts and movies in high quality HD at a resolution of 1920x1080 pixels in graphic resolution at 1080p (Full HD).
The TX-40CSR520 is equipped with SMART software, built-in applications and Internet connectivity. Internet connection can be made via Wi-Fi wireless connection. 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.
Speaker power 20 W (2x10 W) is provided by two speakers. Uses NICAM stereo signal system and Sound Surround function.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, component, SCART, HDMI x2, USB, Ethernet (RJ-45), Wi-Fi. A headphone output is provided for individual listening. A VGA (D-Sub 15) connector is used to connect a computer or laptop, supporting resolutions: 640x480, 800x600, 1024x768, 1280x1024, 1360x768, 1920x1080. The digital tuner is capable of receiving television channels in the DVB-T, DVB-T2, DVB-C standards.
Dimensions: with stand 904x556x230 mm, without stand 904x518x47 mm.
TV weight: with stand: 12.5 kg, without stand: 10.5 kg.
Attention! The panel of the PANASONIC TX-40CSR520 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.
( AND YOUR CAT HAS TO GO TO PISS SOMEWHERE ELSE !!!! )