PHILIPS LED
Model: 32PHS4062 / 60
Chassis / Version: KTS17.2E LA
Panel: K320WDK3B
LED backlight: 4708-K32WDC
T-CON: 6870C-0442B
LED driver (backlight): integrated into MainBoard
PWM LED driver: OB3353CP
MOSFET LED driver: TO-252
Power Supply (PSU): integrated into MainBoard
MainBoard: MSD3663-T5C1
IC MainBoard: SPI FLASH: GD25Q64B
Tuner: ST43WS-2A-E, CDT-9NS16J-RD41 (DVB-S)
Specifications 32PHS4062
PHILIPS 32PHS4062
General recommendations for TV LCD LED repair
Possible manifestations of defects
- PHILIPS 32PHS4062 does not turn on, does not respond to buttons and the remote control, indicators on the front panel do not light or flash.
In this case, the main power supply, the AC / DC voltage converter, may be faulty, the elements of which in this model are located on the main board MainBoard MSD3663-T5C1. It is necessary to make sure that its output voltages are present and, if they are completely absent, check the power switches and rectifier diodes for a possible short circuit.
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.
Mos-Fet power switches used in switching power supplies sometimes fail due to a malfunction of any other elements that can disable it in the key mode, or create an excess of the maximum permissible key parameters. These can be elements supplying a PWM regulator, frequency setting or damper circuits, or elements of negative feedback in the stabilization circuit. PWM controllers, in the absence of visible damage or outright short circuits between the terminals, are checked by replacing them with new ones, or known to be working properly.
- There is no image, the screen is black, there is sound, when the screen is illuminated outside, you can sometimes see barely noticeable outlines of the image.
Often in such cases, there is no backlighting of the LED panel. The reason may be in the breakage of the backlight LEDs, in the stabilization of their power supply, or in the violation of the contact connections of the strings 4708-K32WDC connectors.
When trying to detect a break in the LED lines, it should be borne in mind that it is difficult to do this without disassembling the panel. For example, a current source is needed to open PN junctions connected in series.
If the PHILIPS 32PHS4062 has no picture, but there is sound, the backlight of the K320WDK3B 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 K320WDK3B LCD panel - a process that requires experience and qualifications from the master. I 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 MSD3663-T5C1 often turns out to be faulty; a software failure is also possible.
Then, first of all, you need 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 the normal range, it is necessary to trace the passage of LVDS signals from the MainBoard MSD3663-T5C1 with an oscilloscope, as well as synchronization 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 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 MSD3663-T5C1 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). Complicated repair of MB (SSB) board in some cases is possible and is practiced by repairmen. To do this, check and, if necessary, replace the SPI FLASH: GD25Q64B elements. BGA chip failures are usually easy to detect by warm-up.
If you suspect a malfunction of the ST43WS-2A-E, CDT-9NS16J-RD41 (DVB-S) 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 corresponding tuner pins.
I REMIND THAT Owners and users of the PHILIPS 32PHS4062 TV should remember that self-repair without special knowledge, skills and qualifications may be fraught with negative consequences that can lead to complete non-repairability of the device!
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> PHILIPS 32PHS4062 Chassis KTS17.2E LA FOR MODELS:
Revision after repair of the backlight. MSD3663-T5C1. Information from the master.
Decrease the backlight current from 560 mA to 340 mA - removed two 3.6 Ohm measuring resistors. There are still two 2.0 Ohm resistors in the current sensor of the OB3353CP driver on the MSD3663-T5C1 board.
Additional MainBoard Repair
The appearance of the MainBoard MSD3663-T5C1 is shown in the figure below:
MSD3663-T5C1
The main features of the PHILIPS 32PHS4062 device:
Installed matrix (LED panel) K320WDK3B.
Matrix control uses the Timing Controller (T-CON) 6870C-0442B.
To power the backlight LEDs, a converter combined with the MSD3663-T5C1 main board is used, controlled by the OB3353CP PWM controller. TO-252 switches are used as power elements of the LED driver.
The power module is combined with the MainBoard and is made according to the AC / DC flyback converter circuit.
MainBoard - the main board (motherboard) is an MSD3663-T5C1 module, using SPI FLASH chips: GD25Q64B and others.
Tuner ST43WS-2A-E, CDT-9NS16J-RD41 (DVB-S) provides reception of television programs and tuning to channels.
PHILIPS 32PHS4062 TV with LCD K320WDK3B, diagonal size 31.5 "(80 cm) 16: 9. The required brightness of the screen of 250 cd / m² is provided by LED backlighting. The LCD panel is implemented with backlighting from Direct LED LEDs.
The K320WDK3B sensor and MainBoard MSD3663-T5C1 software provide high quality HD viewing at 1366x768 pixels in 720p (HD Ready). Supported media file formats: MP3, WMA, MPEG4, HEVC (H.265), MKV, JPEG.
Speaker power 16 W (2x8 W) is provided by two speakers. Uses NICAM stereo processing system and Sound Surround function.
External interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, HDMI x2, USB. A headphone output is provided. The digital tuner is capable of receiving television channels in the DVB-T, DVB-T2, DVB-C, DVB-S, DVB-S2 standards.
The power consumed when operating from the network is 55 W. MainBoard power supply.
Dimensions: with stand 732x492x183 mm, without stand 732x432x76 mm.
TV weight: with stand: 3.9 kg, without stand: 3.8 kg.
Attention! Panel K320WDK3B LED TV PHILIPS 32PHS4062 is an expensive and unreliable element.
Avoid any impacts on the glass and pressure on the screen surface to avoid damage to the LED panel!
It is also 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.
Documentation:
Quick start guide PDF file, 2.2 MB, published January 17, 2018
Brochure Version: 2.1.1, PDF file, 465.7 kB, published July 19, 2019
User manual PDF file, 574.8 kB, published March 15, 2018
Files can be downloaded from the manufacturer's website for model 32PHS4062 / 60.