Technical description and composition of the SAMSUNG LE32S62B TV, panel type and applicable modules. The composition of the modules.SAMSUNG
Model: LE32S62B
Chassis / Version: GSA32HEU
Panel: CLAA320WB02
Lamp backlight: 16 Lamp CCFL
T-CON: 320WTC2L V3.7
Inverter (backlight): 4H.V1448.451 / C1
PWM Inverter: MSC16921PW
Power Supply (PSU): BN44-00155A MK32P (DLC32P)
PWM Power: TDA4863G, MC33067P, STR-A6159
MOSFET Power: STP20NM60, FQPF9N50C
MainBoard: BN41-00811B
IC MainBoard: MT8202EG, 24C32P, S29AL016D70TFI01
Tuner: N40-00079A
Specifications LE32S62B
SAMSUNG LE32S62B
General repair guidelines for TV LCD
Possible manifestations of defects
- The SAMSUNG LE32S62B TV does not turn on and does not show any signs of turning on, it does not respond to the control buttons or the remote control.
In such cases, the fault should be sought first in the BN44-00155A power supply module. It is necessary to measure its output voltages and, if they are absent, check the power switches (STP20NM60, FQPF9N50C) and rectifier diodes for the probability of short circuit in the converters.
In case of breakdowns of the diodes in the secondary circuits, the converter can operate in emergency short circuit mode without output voltages, and during short circuit in the power elements of the primary circuit, the mains fuse and / or current sensor at the source of the key usually breaks.
The breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in the circuits supplying the PWM controller, frequency-setting or damper ones, as well as in the circuits of Negative Feedback (OOS) stabilization. PWM controllers (PWM) TDA4863G, MC33067P, STR-A6159, if they do not have visible damage to the case and open fault between the terminals, are usually checked by replacement.
- There is no image, there is sound, there is a reaction to the remote control. Or immediately after turning on for a second, the image may appear and immediately disappear.
These manifestations can be triggered by a power supply module, or by inverter defects, as well as distortion of the currents in the lamps due to their uneven wear. After checking all the electrolytic capacitors of the filters that are involved in the power supply of the inverter, it is necessary to ring in its converter the power switches for breakdown and the secondary windings of the transformers for an open.
Sometimes, for diagnostic purposes, it is necessary to disable the inverter protection. In such cases, special care must be taken during work, and the protection circuits should be restored immediately after the repair is completed.
- The indicator on the front panel blinks, the TV does not turn on in the operating mode, it does not respond to the remote control.
Repair or diagnostics of the BN41-00811B motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, you should update or replace the software (software). Often, the MB (SSB) card must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - MT8202EG, 24C32P, S29AL016D70TFI01 and replace failed chips with new ones. Some malfunctions may be due to the use of BGA soldering technologies in modern Main Board. Typically, such defects are detected by local heating of the chip.
If there is no reception of television channels, but the TV is working properly from external devices, first of all you need to check the voltage of the tuner N40-00079A and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
Owners and users of the SAMSUNG LE32S62B TV should remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!
The appearance of the MainBoard BN41-00811B is shown in the figure below:BN41-00811B
BN41-00811B can be used in TVs:
SAMSUNG LE37S62B (Panel CLAA370WA03 SC), SAMSUNG LE40S62B (Panel T400XW01 V.1).
The appearance of the power supply
Main features of the SAMSUNG LE32S62B device:
Installed matrix (LCD-panel) CLAA320WB02.
The matrix control uses the Timing Controller (T-CON) 320WTC2L.
To power the backlight, an inverter 4H.V1448.451 is used, it is controlled by the PWM controller MSC16921PW.
The necessary supply voltages for all nodes of the SAMSUNG LE32S62B TV are generated by the BN44-00155A power module or its analogs using TDA4863G, MC33067P, STR-A6159 microchips and power switches of the STP20NM60, FQPF9N50C type.
MainBoard - the main board (motherboard) is a BN41-00811B module, using chips MT8202EG, 24C32P, S29AL016D70TFI01 and others.
The N40-00079A tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: CPT
Model: CLAA320WB02
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: MVA, Normally Black, Transmissive
Active Area: 697.68x392.26 mm
Surface: Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1200: 1
Display Colors: 16.7M (8-bit), CIE1931 75%
Response Time: 10/6 (Tr / Td); 8 (G to G)
Frequency: 60Hz
Lamp Type: 16 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V