Technical description and composition of the SAMSUNG UE32C6540 TV, panel type and modules used. The composition of the modules.SAMSUNG LED
Model: UE32C6540
Chassis / Version: N96A
Panel: LTF320HF02
LED driver (backlight): integrated into PSU
PWM LED driver: SELC2010
Power Supply (PSU): BN44-00355A
PWM Power: ICE3BR1765J, UCC25600
MOSFET Power: FQPF9N50CF
MainBoard: BN41-01444C BN94-04235L
IC MainBoard: CPU: SDP92, Weltrend: WT61P802, DRAM: K4T1G164QF, NAND Flash: KFG8GH6U4M, EEPROM: 24C256
Tuner: BN40-00172A DT0S40CVH081A
UE32C6540 Specifications
SAMSUNG UE32C6540
General recommendations for TV LCD LED repair
Possible manifestations of defects
- SAMSUNG UE32C6540 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.
With similar manifestations, a malfunction is most likely found in the BN44-00355A power module. Its output voltages should be measured and, in their absence, the serviceability of the power switches and rectifier diodes in the converters should be checked for possible breakdown.
In the event of diode breakdowns in the secondary circuits, the converter can operate in an emergency mode of short circuit without output voltages, and in the event of a short circuit in the power elements of the primary circuit, the mains fuse and / or the current sensor in the source of the key usually 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 the PWM controller, damper or frequency setting circuits, or OOS (negative feedback) elements in the stabilization circuit. PWM controllers (PWM) ICE3BR1765J, UCC25600, in the absence of external damage and short circuit between the terminals, are checked by replacing them with a known good one.
- 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.
Often in such cases, there is no backlighting of the LED panel. Often the cause of a malfunction is the lack of current in the LED circuit, for example, their open or short circuit, or a violation of the contact connections of the connectors.
It is impossible to check the line of series-connected LEDs without a special current source, and it is unsafe for them to use any voltage sources above 12V for this purpose. Then all that remains is to open the panel and check each LED separately. Typically, Chinese multimeters with a 9V power supply lightly light up one 3-volt LED if you connect the probes to it in the forward direction, the red probe to the anode, and the black one to the cathode. For dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of 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 TV does not go into operation, does not respond to the remote control. The indicator on the front panel is on or blinking.
If SAMSUNG UE32C6540 has no picture, but there is sound, often the LTF320HF02 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 LTF320HF02 LCD panel, a process that requires experience and qualifications from the technician. 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 the 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 BN41-01444C 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 normal limits, it is necessary to trace the passage of LVDS signals from the MainBoard BN41-01444C, as well as synchronizing signals to the loops with drivers, with an oscilloscope.
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 ............
Repair or diagnostics of the BN41-01444C motherboard should begin with checking the stabilizers and power converters necessary to power the microcircuits and matrix. If necessary, you should update or replace the software (software). In some cases, to repair the MB (SSB) board, it may be necessary to replace the chips - CPU: SDP92, Weltrend: WT61P802, DRAM: K4T1G164QF, NAND Flash: KFG8GH6U4M, EEPROM: 24C256 with new or known good ones. In cases where BGA technologies are used, defects are usually localized by heating.
Before replacing the tuner BN40-00172A DT0S40CVH081A, if there is no tuning to the channels, you must first check the software and the supply voltage at its outputs. You also need to make sure that the tuner and processor can exchange data via the I2C bus
Users and owners of TVs need to remember that attempts to self-repair a SAMSUNG UE32C6540 TV without the appropriate qualifications and the necessary experience can lead to serious negative consequences!
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Chassis N96A for models UE32C6000RW, UE37C6000RW, UE40C6000RW, UE46C6000RW, UE55C6000RW, UE32C6500, UE40C6540, UE46C6500, UE46C6510, UE46C6530, UE32C6510, UE32C6530, UE32C6540, UE37C6500, UE37C6530, UE37C6540, UE40C6500, UE40C6510, UE40C6530, UE46C6540, UE55C6500, UE32C6700, UE32C6710, UE32C6730, UE37C6700, UE37C6710, UE37C6730, UE40C6700, UE40C6710, UE40C6730, UE46C6700, UE46C6710, UE46C6730, UE55C6700, UE55C6710
Additional MainBoard Repair
The appearance of the MainBoard BN41-01444C is shown in the figure below:
BN41-01444C
BN41-01444C can be used in TVs:
SAMSUNG UE40C6510UW (Panel T400FBE2-DB), SAMSUNG UE32C6510UW (Panel LTF320HF02), SAMSUNG UE55C6000RW UE55C6000 (Panel LTF550HJ03), SAMSUNG UE40C6000 UE40C6000RW (Panel LTF400HJ05 (BN07-00913A)).
External view of the power supply
Main features of SAMSUNG UE32C6540 device:
Installed matrix (LED panel) LTF320HF02.
To power the backlight LEDs, a converter combined with a power supply is used, controlled by the SELC2010 PWM controller.
The formation of the necessary supply voltages for all nodes of the SAMSUNG UE32C6540 TV is carried out by the BN44-00355A power module, or its analogs using ICE3BR1765J, UCC25600 microcircuits and FQPF9N50CF power switches.
MainBoard - the main board (motherboard) is a BN41-01444C module, using a microcircuit CPU: SDP92, Weltrend: WT61P802, DRAM: K4T1G164QF, NAND Flash: KFG8GH6U4M, EEPROM: 24C256 and others.
Tuner BN40-00172A DT0S40CVH081A provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTF320HF02
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1920x1080, FHD
Display Mode: S-PVA, Normally Black, Transmissive
Display Colors: 16.7M (8-bit)
Frequency: 120Hz
Lamp Type: WLED.
SAMSUNG UE32C6540 TV with LCD display LTF320HF02, 32 "(81 cm) diagonal 16: 9 format. This model uses a panel with edge LED backlighting - Edge LED.
The LTF320HF02 sensor and MainBoard BN41-01444C software allow viewing of broadcasts and movies in high quality HD at a resolution of 1920x1080 pixels in graphics resolution at 1080p (Full HD).
The UE32C6540 TV is equipped with SMART software, built-in applications and the ability to work on the Internet. The connection to the network can be carried out via Wi-Fi wireless connection. The input analog video signal is decoded in PAL, SECAM, NTSC systems. Graphic processing of a digital signal is performed in the 480i, 480p, 576i, 576p, 720p, 1080i, 1080p standards. Supported media file formats: MP3, WMA, MPEG4, Xvid, DivX, MKV, JPEG.
Sound speaker system power 20 W. The NICAM stereo audio processing system and the Sound Surround function are used.
Communication with other devices via an external interface is supported by standard input and output connectors: antenna input (RF), AV, audio x2, component, SCART, RGB, VGA, HDMI x4, USB x2, Ethernet (RJ-45). A headphone jack is provided. To connect a computer or laptop to this TV model, a VGA (D-Sub 15) connector is provided. This interface supports standard resolutions: 640x480, 800x600, 1024x768, 1280x1024, 1360x768, 1920x1080.
The digital tuner can receive TV channels in DVB-T MPEG4, DVB-C standards.
The power consumed when operating from the network is 120 W. Power supply BN44-00355A.
Dimensions: with stand 771x542x240 mm, without stand 771x480x30 mm.
TV weight: with stand: 9.6 kg, without stand: 8.3 kg.
Attention! Panel LTF320HF02 LED TV SAMSUNG UE32C6540 is an expensive and unreliable element.
Do not allow any impact 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.
